CN107218024A - Method for adjusting rhombus inverted nine-point well pattern in high water-cut period of multilayer low-permeability sandstone oil reservoir - Google Patents
Method for adjusting rhombus inverted nine-point well pattern in high water-cut period of multilayer low-permeability sandstone oil reservoir Download PDFInfo
- Publication number
- CN107218024A CN107218024A CN201710301343.5A CN201710301343A CN107218024A CN 107218024 A CN107218024 A CN 107218024A CN 201710301343 A CN201710301343 A CN 201710301343A CN 107218024 A CN107218024 A CN 107218024A
- Authority
- CN
- China
- Prior art keywords
- water
- well
- oil
- reservoir
- cut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000003129 oil well Substances 0.000 claims abstract description 75
- 238000002347 injection Methods 0.000 claims abstract description 64
- 239000007924 injection Substances 0.000 claims abstract description 64
- 230000035699 permeability Effects 0.000 claims abstract description 50
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims abstract description 33
- 230000000694 effects Effects 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims description 47
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 230000015572 biosynthetic process Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000004087 circulation Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 235000003283 Pachira macrocarpa Nutrition 0.000 description 1
- 241001083492 Trapa Species 0.000 description 1
- 235000014364 Trapa natans Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 235000009165 saligot Nutrition 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a method for adjusting a rhombus inverted nine-point well pattern in a high water-cut period of a multilayer low-permeability sandstone reservoir, which comprises the following steps: the method comprises the following steps: judging the dominant direction on the plane of the reservoir; step two: on the plane, judging a high water-cut oil well; in the longitudinal direction, judging high water-bearing layers in the multiple sets of oil layers; step three: dividing a development layer system based on the water drive effect of the oil layer; step four: for high water content oil wells, plugging high water content oil layers; for the water injection well, separate-layer water injection is carried out; step five: and (4) adjusting the structure of the rhombic nine-point reverse well pattern in a mode of converting the high-water-content oil well in the step four into a water injection well. The adjusting method provided by the invention can reduce the ineffective water circulation of the layer with relatively high permeability and large thickness, and improve the water drive effect and reserve utilization degree of the layer with relatively low permeability and small thickness, thereby improving the oil well yield, and improving the oil extraction speed, the final water drive recovery rate and the economic benefit of oil reservoir development.
Description
Technical field
The invention belongs to the field of petroleum exploitation of multilayer sandstone oil reservoir, and in particular to a kind of multilayer low permeability sandstone reservoir is high
The method of adjustment of Water-cut Period rhombic inverted nini-spot well pattern.
Background technology
Low-permeability oil deposit refers to that ground level air infiltration rate is less than 50mD oil reservoir.China has put into the hyposmosis of exploitation at present
Oil field, largely belongs to river-delta deposit type, reservoir have in the plane certain anisotropism and it is infiltrative it is each to
The opposite sex.On longitudinal direction, the oil-containing number of plies is more, and well section is longer, and interlayer heterogeneity is stronger.The type oil reservoir development is typically anti-using rhombus
Nine-spot pattern (see Fig. 1).After long-term injecting water, oil reservoir comprehensive water cut is begun to ramp up.When comprehensive water cut is more than 60%, the oil reservoir enters
Enter high water-cut development period.In this period, due to the influence of interlayer permeability contrast, there is individual layer water filling and dashed forward in multilayer sandstone oil reservoir
Enter the problems such as phenomenon is serious, each layer waterflooding effect difference is big, reserves exploitation degree is unbalanced, water consumption increases.This is because, oozing
The filtrational resistance for the layer that rate is of a relatively high, core intersection is larger thoroughly is small, and injection water is preferential to be flowed in this kind of layer, causes this layer
Oil well water breakthrough is early, aqueous rising is fast, and waterflooding effect is good, and reserves exploitation degree is high, and invalid water circulation is serious, and water consumption is big；And ooze
Saturating rate is relatively low, thinner thickness layer filtrational resistance is larger, under the conditions of commingled water injection, and injection water enters relative difficulty,
Waterflooding effect is poor, and reserves exploitation degree is low.Therefore, in order to solve these technical problems, it is necessary to study that a kind of to be applied to multilayer low
The method of adjustment of the rhombic inverted nini-spot well pattern of permeability sandstone oil reservoir high water-cut stage.
The content of the invention
To reach above-mentioned purpose, the invention provides a kind of anti-9 wells of multilayer low permeability sandstone reservoir high water-cut stage rhombus
The method of adjustment of net.To solve the exploitation of multilayer low permeability sandstone reservoir high water-cut stage, to there is individual layer water filling phenomenon of advancing by leaps and bounds serious, each
The problems such as layer waterflooding effect difference is big, reserves exploitation degree is unbalanced, water consumption increases.
Present invention also offers the multilayer low permeability sandstone reservoir high water-cut stage rhombus obtained by above-mentioned method of adjustment is anti-
Nine-spot pattern.
To reach above-mentioned purpose, the invention provides a kind of anti-9 wells of multilayer low permeability sandstone reservoir high water-cut stage rhombus
The method of adjustment of net, wherein, this method comprises the following steps：
Step one：Judge the predominant direction in reservoir plane；
Step 2：In plane, high-water-cut oil-producing well is judged；On longitudinal direction, the high aquifer formation in many set oil reservoirs is judged；
Step 3：Using the waterflooding effect of oil reservoir as foundation, straticulate exploration is divided；
Step 4：For high-water-cut oil-producing well, high watercut layer is blocked；For water injection well, seperated layer water injection is carried out；
Step 5：By way of the high-water-cut oil-producing well in step 4 is changed into water injection well, anti-9 wells of rhombus are adjusted
Web frame.
The method of adjustment that the present invention is provided is that reservoir infiltration is considered on the predominant direction that reservoir is considered in a kind of plane, longitudinal direction
Sex differernce, with reference to the method for adjustment of the rhombic inverted nini-spot well pattern of the technologies such as seperated layer water injection, water blockoff and artificial fracturing, with good
Application prospect.
In the art, when the moisture content of oil well is higher than 60%, it is considered that the oil well is high-water-cut oil-producing well；When aqueous
When the moisture content of layer is higher than 60%, it is considered that the water-bearing layer is high aquifer formation.
In the method for adjustment of above-mentioned multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is preferable that upper
State in step one, judge predominant direction in reservoir plane foundation include sand thickness distributed data, reservoir permeability respectively to
Different in nature data, the intrinsic fracture data of core observation, artificial fracture directional surveillance data or dynamic analysis of data.
In the method for adjustment of above-mentioned multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is preferable that upper
State in step 2, judging the foundation of the high aquifer formation in many set oil reservoirs includes oil well liquid-producing sectional data, profile-log of water injection
Data or Submerged Layer Logging Interpretation data.
In the method for adjustment of above-mentioned multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is preferable that upper
State in step 3, judging the data of reservoir water flooding effect includes core intersection data, permeability value data or every thickness of interlayer money
Material.The step is that the oil reservoir of the good oil reservoir of waterflooding effect and waterflooding effect difference is distinguished, so as to divide straticulate exploration；Generally
In the case of, the waterflooding effect for the oil reservoir that core intersection is big, permeability is of a relatively high is good；Core intersection is smaller, permeability relatively
The waterflooding effect of small oil reservoir is poor.
In the method for adjustment of above-mentioned multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is preferable that upper
State in step 4, the mode of closure high watercut layer is machine plugging or chemical plugging.
In the method for adjustment of above-mentioned multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is preferable that upper
State in step 4, be to realize seperated layer water injection by way of packer card is sealed.
In the method for adjustment of above-mentioned multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is preferable that upper
State in step 5, the detailed process that high-water-cut oil-producing well is changed into water injection well includes：
(1) normal production is implemented to blocking the high-water-cut oil-producing well after high watercut layer in step 4, until moisture content is again
More than High water cut boundary；
(2) and then the oil well is changed into water injection well and carries out water injection work.
In the method for adjustment of above-mentioned multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is preferable that upper
State in step (2), the water injection work is to use to carry out seperated layer water injection with the water injection well identical mode in step 4.
The present invention separately provides a kind of multilayer low permeability sandstone reservoir high water-cut stage water chestnut obtained by above-mentioned method of adjustment
Shape inverted nine-spot pattern, in the well pattern, at least a bite high-water-cut oil-producing well in former well pattern has been converted to the water filling in existing well pattern
Well.
In above-mentioned multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is preferable that the height in former well pattern
Aqueous well all has been converted to the water injection well in existing well pattern.
The scheme that the present invention is provided can be good at the high water-cut stage exploitation of solution multilayer low permeability sandstone reservoir and there is individual layer
Water filling is advanced by leaps and bounds the problems such as phenomenon is serious, each layer waterflooding effect difference big, reserves exploitation degree is unbalanced, water consumption increases.This hair
The method of adjustment of bright offer can reduce that permeability is of a relatively high, thickness larger layers invalid water circulations, improve permeability it is relatively low,
The waterflooding effect and reserves exploitation degree of thinner thickness layer, and then oil well output is improved, improve rate of oil production, the harvesting of final water drive
The economic benefit of rate and oil reservoir development.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Constitute limitation of the invention.In the accompanying drawings：
Fig. 1 is the rhombic inverted nini-spot well pattern schematic diagram in background technology；
Fig. 2 is the flow chart of a specific embodiment of the rhombic inverted nini-spot well pattern method of adjustment of the present invention；
Seperated layer water injections and oilwell water shutoff schematic diagram of the Fig. 3 for embodiments of the invention 1；
Fig. 4 adjusts the schematic diagram of structure for the rhombic inverted nini-spot well pattern of the embodiment of the present invention 2；
Fig. 5 adjusts the schematic diagram of structure for the rhombic inverted nini-spot well pattern of the embodiment of the present invention 3.
The reference of the figures above：1st, corner well；2nd, end hole；3rd, corner well；4th, end hole；5th, corner well；6th, end hole；7th, corner well；
8th, end hole；9th, water injection well；10th, the line of the anti-9 flooding pattern construction units of rhombus；11st, packer；12nd, distributing tap.
Embodiment
In order to which technical characteristic, purpose and beneficial effect to the present invention are more clearly understood from, now to the skill of the present invention
Art scheme carry out it is described further below, but it is not intended that to the present invention can practical range restriction.
Following embodiment is specifically described the implementation process of the present invention by taking anti-9 well groups of a rhombus as an example.Rhombus is anti-
The long-diagonal of nine-spot pattern is partly called well spacing, is designated as a；Short diagonal is partly called array pitch, is designated as b.
Embodiment 1
Present embodiments provide a kind of method of adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern
Specific implementation process.Such as the flow chart that Fig. 2 is rhombic inverted nini-spot well pattern method of adjustment in the present embodiment.
In step 201, the predominant direction in reservoir plane is judged；Detailed process is：
According to sand thickness distributed data, reservoir permeability anisotropy data, the intrinsic fracture data of core observation, people
The data such as work pressure-break directional surveillance and dynamic analysis, judges the predominant direction in reservoir plane.
The basically identical direction of sand thickness, is the predominant direction in reservoir plane；On the contrary, be perpendicularly to the direction, it is
Non-advantage direction in reservoir plane.
According to reservoir permeability anisotropy data, the big direction of penetration value is the predominant direction in reservoir plane；
On the contrary, be perpendicularly to the direction, it is the non-advantage direction in reservoir plane.
The direction of rock core intrinsic fracture extension, is the predominant direction in reservoir plane；Opposed vertical, in the direction, is storage
Non-advantage direction on layer plane.
The direction of artificial fracture extension, is the predominant direction in reservoir plane；Opposed vertical, in the direction, is reservoir
Non-advantage direction in plane.
According to dynamic analysis, in a rhombic inverted nini-spot well pattern unit, in the oil well closed on being connected with water injection well,
The line direction of daily fluid production rate highest, moisture content highest oil well and water injection well is the predominant direction of reservoir.
Under normal circumstances, the predominant direction in reservoir plane differentiated according to this five kinds of data is consistent.In example 1
In, by permeability anisotropy's data and dynamic analysing method, judge the folder of reservoir predominant direction and rhombus long-diagonal
Angle is less than 0.5arctan (2b/a), i.e. reservoir predominant direction and No. 7 wells and No. 3 well line directions are basically identical.Flow is entered
Step 202.
In step 202, plane, high-water-cut oil-producing well is judged；On longitudinal direction, the high aquifer formation in many set oil reservoirs is judged；Specifically
Process is：
In plane, the oil well of High water cut is judged.When the moisture content of oil well is higher than 60%, that is, it is High water cut to think the oil well
Oil well.For example in Fig. 1, the moisture content of No. 1 oil well is 58%, and the moisture content of No. 2 oil wells is 70%, and the moisture content of No. 3 oil wells is
58%, the moisture content of No. 4 oil wells is 70%, and the moisture content of No. 5 oil wells is 58%, and the moisture content of No. 6 oil wells is 70%, No. 7 oil
The moisture content of well is 58%, and the moisture content of No. 8 oil wells is 70%.So, the oil well of High water cut be No. 2, No. 4, No. 6 and No. 8 this
Four mouthfuls of oil wells (referred to as " end hole ") in the rhombus length of side, low aqueous oil well is No. 1, No. 3, No. 5 and No. 7 this four mouthfuls and is located at
Oil well (referred to as " corner well ") on dicing.
On longitudinal direction, according to data such as oil well liquid-producing section, profile-log of water injection and Submerged Layer Logging Interpretations, judge many
Cover the high aquifer formation in oil reservoir.Table 1 is the production profile tables of data of No. 2 oil wells, and the layer position of no data is non-oil reservoir.It can be seen that the well
The moisture content of No. 9 floor is higher than 60%, and it is the oil reservoir of High water cut to show this layer.
If there is no production profile table, it can also be judged with the intake profile data binder course position connected relation of water injection well
The oil reservoir of High water cut.Table 2 is the intake profile tables of data of No. 9 water injection wells, and the layer position of no data is non-oil reservoir.Geological research is thought
No. 9 floor of No. 4 oil wells and No. 9 floor of No. 9 water injection wells have preferable connected relation, but No. 4 oil wells do not have production profile data.
As long as the relative injectivity of a certain oil reservoir of so No. 9 water injection wells is more than 70%, you can judge that the height in No. 4 adjacent oil wells contains
Water layer is exactly the layer.It can be seen that, the high watercut layer of No. 4 oil wells is No. 9 floor.Flow enters step 203.
The production profile tables of data of 1 No. 2 oil wells of table
| Layer position | Thickness (m) | Permeability (mD) | Produce liquid (t/d) daily | Moisture content (%) | Relative production liquid (%) |
| 1 | |||||
| 2 | |||||
| 3 | 1.8 | 2.4 | 1.4 | 36 | 9.6 |
| 4 | |||||
| 5 | 2.6 | 6.2 | 2 | 48 | 13.7 |
| 6 | |||||
| 7 | 1.5 | 1.8 | 1.2 | 42 | 8.2 |
| 8 | |||||
| 9 | 4.2 | 10.6 | 10.4 | 82 | 71.2 |
The intake profile tables of data of 2 No. 9 water injection wells of table
| Layer position | Thickness (m) | Permeability (mD) | Absolute water absorption (m3/d) | Relative injectivity (%) |
| 1 | ||||
| 2 | ||||
| 3 | 1.4 | 1.8 | 3 | 6.7 |
| 4 | ||||
| 5 | 2.8 | 6.4 | 8 | 17.8 |
| 6 | ||||
| 7 | 1.6 | 2.0 | 4 | 8.9 |
| 8 | ||||
| 9 | 4.8 | 14.2 | 32 | 71.1 |
In step 203, the oil reservoir of the good oil reservoir of waterflooding effect and waterflooding effect difference is distinguished, straticulate exploration is divided；
Detailed process is：
According to data such as core intersection, permeability values, the oil reservoir of the good oil reservoir of waterflooding effect and waterflooding effect difference is distinguished
Come, divide straticulate exploration.Under normal circumstances, the waterflooding effect for the oil reservoir that core intersection is big, permeability is of a relatively high is good；Oil reservoir
The waterflooding effect for the oil reservoir that thickness is smaller, permeability is relatively small is poor.The high watercut layer identified according to step 202 is
Therefore No. 3 floor, No. 5 floor and No. 7 floor, are divided into the first series of strata, No. 9 floor are divided into the second series of strata by No. 9 floor.Flow enters
To step 204.
In step 204, for high-water-cut oil-producing well, high watercut layer is blocked；For water injection well, seperated layer water injection is carried out；Specifically
Process is (schematic diagram is shown in Fig. 3)：
For high-water-cut oil-producing well, using mechanically or chemically blocking high watercut layer.By taking No. 2 oil wells as an example,
High aquifer formation is No. 9 floor, between No. 7 and No. 9 floor, will insulate high aquifer formation under packer.For water injection well 9, pass through " double envelopes
The mode of dispensing ", i.e., by under the first packer at more than No. 3 floor 3 meters, by under the second packer to No. 7 floor and No. 9 floor it
Between, the first distributing tap is loaded onto on the oil pipe between the first and second packers, is loaded onto on the oil pipe below the second packer
Second distributing tap, the depth of distributing tap is equal to the middle part depth of No. 9 floor, is divided to two sections of water fillings to realize.Flow enters step
205。
In step 205, by way of the high-water-cut oil-producing well in step 4 is changed into water injection well, anti-9 points of rhombus is adjusted
Well pattern structure；Detailed process is：
By way of oil well is changed into water injection well (referred to as " metaideophone "), rhombic inverted nini-spot well pattern structure is adjusted, changed
The flow circuits (referred to as " streamline ") of water in the earth formation are injected, so as to improve development effectiveness.Reservoir predominant direction and rhombus length pair
When the angle of linea angulata is less than 0.5arctan (2b/a), i.e. reservoir predominant direction and No. 7 wells and basically identical No. 3 well line directions,
No. 2, No. 4, No. 6 and No. 8 oil wells take packing high aquifer formation operation, No. 3 floor of continuation production, No. 5 floor and No. 7 according to step 204
First series of strata of layer composition；No. 9 water injection wells take " double envelope dispensings " operation according to step 204；No. 1, No. 3, No. 5 and No. 7 oil well
Continue normal production.
Embodiment 2：
Present embodiments provide a kind of method of adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern
Specific implementation process.Fig. 2 flow chart is also suitable the present embodiment.
In step 201, by permeability anisotropy's data and dynamic analysing method, judge the predominant direction of reservoir with
The angle of rhombus long-diagonal be more than 0.5arctan (2b/a) and less than 1.5arctan (2b/a) when, i.e., reservoir predominant direction with
No. 6 wells and No. 2 well line directions are basically identical.Flow enters step 202.
In step 202, the moisture content of No. 1 oil well is 58%, and the moisture content of No. 2 oil wells is 70%, the moisture content of No. 3 oil wells
It is 58%, the moisture content of No. 4 oil wells is 58%, the moisture content of No. 5 oil wells is 58%, the moisture content of No. 6 oil wells is 70%, No. 7
The moisture content of oil well is 58%, and the moisture content of No. 8 oil wells is 58%.So, the oil well of High water cut is No. 2 and No. 6 this two mouthfuls of oil
Well, remaining is low aqueous well.On longitudinal direction, the oil reservoir of High water cut is No. 9 floor.
In step 203, No. 3 floor, No. 5 floor and No. 7 floor are divided into the first series of strata, No. 9 floor are divided into the second series of strata.Stream
Journey enters step 204.
In step 204, for No. 2 and No. 6 oil wells, between No. 7 and No. 9 floor, high aquifer formation will be insulated under packer.It is right
In water injection well, by way of " double envelope dispensings ", i.e., by under the first packer at more than No. 3 floor 3 meters, by under the second packer
To between No. 7 floor and No. 9 floor, the first distributing tap is loaded onto on the oil pipe between the first and second packers, in the second packer
The second distributing tap is loaded onto on following oil pipe, the depth of distributing tap is equal to the middle part depth of No. 9 floor, is divided to two sections of water fillings to realize.
Flow enters step 205.
In step 205, No. 2 and No. 6 oil wells take packing high aquifer formation operation according to step 204, continue to produce No. 3 floor,
First series of strata of No. 5 floor and No. 7 floor compositions；No. 9 water injection wells take " double envelope dispensings " operation according to step 204；Remaining oil well is just
Often production.Produce after a period of time, when the moisture content of No. 2 and No. 6 oil wells reaches 60%, no longer insulate the High water cut of No. 9 floor
Layer, using with No. 9 water injection well identical methods, take " double envelope dispensings " operation, form the adjustment well pattern such as Fig. 4.Now streamline
Become, No. 5, No. 7 and No. 8 oil wells of injection current direction of No. 6 converted production wells；The injection current direction of No. 9 water injection wells No. 4, No. 5, No. 8
With No. 1 oil well；No. 3, No. 4 and No. 1 oil wells of injection current direction of No. 2 converted production wells.The swept volume of injection water is expanded, is improved
Development effectiveness.
Embodiment 3：
Present embodiments provide a kind of method of adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern
Specific implementation process.Fig. 2 flow chart is also suitable the present embodiment.
In step 201, by permeability anisotropy's data and dynamic analysing method, judge the predominant direction of reservoir with
When the angle of rhombus long-diagonal is more than [180 ° of -1.5arctan (2b/a)] and is less than [180 ° of -0.5arctan (2b/a)], i.e.,
Reservoir predominant direction and No. 8 wells and No. 4 well line directions are basically identical.Flow enters step 202.
In step 202, the moisture content of No. 1 oil well is 58%, and the moisture content of No. 2 oil wells is 58%, the moisture content of No. 3 oil wells
It is 58%, the moisture content of No. 4 oil wells is 70%, the moisture content of No. 5 oil wells is 58%, the moisture content of No. 6 oil wells is 58%, No. 7
The moisture content of oil well is 58%, and the moisture content of No. 8 oil wells is 70%.So, the oil well of High water cut is No. 4 and No. 8 this two mouthfuls of oil
Well, remaining is low aqueous well.On longitudinal direction, the oil reservoir of High water cut is No. 9 floor.
In step 203, No. 3 floor, No. 5 floor and No. 7 floor are divided into the first series of strata, No. 9 floor are divided into the second series of strata.Stream
Journey enters step 204.
In step 204, for No. 4 and No. 8 oil wells, between No. 7 and No. 9 floor, high aquifer formation will be insulated under packer.It is right
In water injection well, by way of " double envelope dispensings ", i.e., by under the first packer at more than No. 3 floor 3 meters, by under the second packer
To between No. 7 floor and No. 9 floor, the first distributing tap is loaded onto on the oil pipe between the first and second packers, in the second packer
The second distributing tap is loaded onto on following oil pipe, the depth of distributing tap is equal to the middle part depth of No. 9 floor, is divided to two sections of water fillings to realize.
Flow enters step 205.
In step 205, No. 4 and No. 8 oil wells take packing high aquifer formation operation according to step 204, continue to produce No. 3 floor,
First series of strata of No. 5 floor and No. 7 floor compositions；No. 9 water injection wells take " double envelope dispensings " operation according to step 204；Remaining oil well is just
Often production.Produce after a period of time, when the moisture content of No. 4 and No. 8 oil wells reaches 60%, no longer insulate the High water cut of No. 9 floor
Layer, using with No. 9 water injection well identical methods, take " double envelope dispensings " operation, form the adjustment well pattern such as Fig. 5.Now streamline
Become, No. 2, No. 3 and No. 5 oil wells of injection current direction of No. 4 converted production wells；The injection current direction of No. 9 water injection wells No. 1, No. 2, No. 5
With No. 6 oil wells；No. 1, No. 6 and No. 7 oil well of injection current direction of No. 8 converted production wells.The swept volume of injection water is expanded, is improved
Development effectiveness.
Claims (10)
1. a kind of method of adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern, it is characterised in that the party
Method comprises the following steps：
Step one：Judge the predominant direction in reservoir plane；
Step 2：In plane, high-water-cut oil-producing well is judged；On longitudinal direction, the high aquifer formation in many set oil reservoirs is judged；
Step 3：Using the waterflooding effect of oil reservoir as foundation, straticulate exploration is divided；
Step 4：For high-water-cut oil-producing well, high watercut layer is blocked；For water injection well, seperated layer water injection is carried out；
Step 5：By way of the high-water-cut oil-producing well in step 4 is changed into water injection well, rhombic inverted nini-spot well pattern knot is adjusted
Structure.
2. the method for adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern according to claim 1,
Characterized in that, in above-mentioned steps one, judge the predominant direction in reservoir plane foundation include sand thickness distributed data,
Reservoir permeability anisotropy data, the intrinsic fracture data of core observation, artificial fracture directional surveillance data or dynamic point
Analysis data.
3. the adjustment side of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern according to claim 1 or 2
Method, it is characterised in that in above-mentioned steps two, judges that the foundation of the high aquifer formation in many set oil reservoirs is provided including oil well liquid-producing section
Material, profile-log of water injection data or Submerged Layer Logging Interpretation data.
4. the tune of the multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern according to claim any one of 1-3
Adjusting method, it is characterised in that in above-mentioned steps three, judging the data of reservoir water flooding effect includes core intersection data, infiltration
Rate value data or every thickness of interlayer data.
5. the tune of the multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern according to claim any one of 1-4
Adjusting method, it is characterised in that in above-mentioned steps four, the mode of closure high watercut layer is machine plugging or chemical plugging.
6. the tune of the multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern according to claim any one of 1-5
Adjusting method, it is characterised in that in above-mentioned steps four, is to realize seperated layer water injection by way of packer card is sealed.
7. the tune of the multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern according to claim any one of 1-6
Adjusting method, it is characterised in that in above-mentioned steps five, the detailed process that high-water-cut oil-producing well is changed into water injection well includes：
(1) implement normal production to blocking the high-water-cut oil-producing well after high watercut layer in step 4, until moisture content again above
High water cut boundary；
(2) and then the oil well is changed into water injection well and carries out water injection work.
8. the method for adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern according to claim 7,
Characterized in that, in above-mentioned steps (2), the water injection work is to use to carry out with the water injection well identical mode in step 4
Seperated layer water injection.
9. the multilayer low permeability sandstone reservoir high water-cut stage rhombus that a kind of method of adjustment by any one of claim 1-8 is obtained
Inverted nine-spot pattern, it is characterised in that in the well pattern, at least a bite high-water-cut oil-producing well in former well pattern has been converted to existing well pattern
In water injection well.
10. multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern according to claim 9, its feature exists
In in the well pattern, the high-water-cut oil-producing well in former well pattern all has been converted to the water injection well in existing well pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301343.5A CN107218024B (en) | 2017-05-02 | 2017-05-02 | Method for adjusting rhombus inverted nine-point well pattern in high water-cut period of multilayer low-permeability sandstone oil reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301343.5A CN107218024B (en) | 2017-05-02 | 2017-05-02 | Method for adjusting rhombus inverted nine-point well pattern in high water-cut period of multilayer low-permeability sandstone oil reservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107218024A true CN107218024A (en) | 2017-09-29 |
| CN107218024B CN107218024B (en) | 2019-06-11 |
Family
ID=59943710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710301343.5A Active CN107218024B (en) | 2017-05-02 | 2017-05-02 | Method for adjusting rhombus inverted nine-point well pattern in high water-cut period of multilayer low-permeability sandstone oil reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107218024B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869334A (en) * | 2017-10-23 | 2018-04-03 | 中国石油天然气股份有限公司 | Layer system recombination and exploitation method of multi-layer sandstone oil reservoir in middle and later stages of water injection development |
| CN108915649A (en) * | 2018-07-25 | 2018-11-30 | 大庆油田有限责任公司 | A kind of oil reservoir pressure is stifled to drive technology pattern preferred method |
| CN108952658A (en) * | 2018-07-03 | 2018-12-07 | 成都北方石油勘探开发技术有限公司 | Water injection well well choosing method for Fracturing Technology |
| CN109113732A (en) * | 2018-08-09 | 2019-01-01 | 中国石油天然气股份有限公司 | Reservoir heterogeneity determination method and device |
| CN110318719A (en) * | 2018-03-28 | 2019-10-11 | 中国石油化工股份有限公司 | A kind of two-way displacement method of positive rhythm thick formation |
| CN110454123A (en) * | 2019-08-08 | 2019-11-15 | 大港油田集团有限责任公司 | A kind of more wells collaboration energizations of LOW PERMEABILITY RESERVOIR are handled up method |
| CN111749660A (en) * | 2019-03-29 | 2020-10-09 | 中国石油天然气股份有限公司 | Well pattern injection and production method and device |
| CN111749671A (en) * | 2019-03-29 | 2020-10-09 | 中国石油天然气股份有限公司 | Method and device for injection-production among development layers of well pattern |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148985A (en) * | 2007-10-26 | 2008-03-26 | 大庆油田有限责任公司 | Adjusting method for oil field injection and extraction system in ultra-high water-containing period |
| CN102146788A (en) * | 2011-03-30 | 2011-08-10 | 中国石油化工股份有限公司 | Method for enhancing recovery ratio through three-dimensional streamline regulation of water drive reservoir |
| CN102606117A (en) * | 2012-04-05 | 2012-07-25 | 中国石油天然气股份有限公司 | Air nitrogen alternate flooding exploitation method for middle-deep low-permeability thin oil reservoir |
| CN102839958A (en) * | 2012-09-04 | 2012-12-26 | 中国石油天然气股份有限公司 | Longitudinally-superposed-development three-layer-system oil reservoir well pattern and deployment method thereof |
| CN103046910A (en) * | 2013-01-10 | 2013-04-17 | 中国石油天然气股份有限公司 | Water drive development method for oil reservoir in ultrahigh water cut period |
| WO2015199799A2 (en) * | 2014-05-28 | 2015-12-30 | Exxonmobil Upstream Research Company | Method of forming directionally controlled wormholes in a subterranean formation |
| CN205532556U (en) * | 2016-03-29 | 2016-08-31 | 中国石油天然气股份有限公司 | Can improve thick-layer sandstone oil reservoir water drive ripples and well pattern structure of volume |
-
2017
- 2017-05-02 CN CN201710301343.5A patent/CN107218024B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148985A (en) * | 2007-10-26 | 2008-03-26 | 大庆油田有限责任公司 | Adjusting method for oil field injection and extraction system in ultra-high water-containing period |
| CN102146788A (en) * | 2011-03-30 | 2011-08-10 | 中国石油化工股份有限公司 | Method for enhancing recovery ratio through three-dimensional streamline regulation of water drive reservoir |
| CN102606117A (en) * | 2012-04-05 | 2012-07-25 | 中国石油天然气股份有限公司 | Air nitrogen alternate flooding exploitation method for middle-deep low-permeability thin oil reservoir |
| CN102839958A (en) * | 2012-09-04 | 2012-12-26 | 中国石油天然气股份有限公司 | Longitudinally-superposed-development three-layer-system oil reservoir well pattern and deployment method thereof |
| CN103046910A (en) * | 2013-01-10 | 2013-04-17 | 中国石油天然气股份有限公司 | Water drive development method for oil reservoir in ultrahigh water cut period |
| WO2015199799A2 (en) * | 2014-05-28 | 2015-12-30 | Exxonmobil Upstream Research Company | Method of forming directionally controlled wormholes in a subterranean formation |
| CN205532556U (en) * | 2016-03-29 | 2016-08-31 | 中国石油天然气股份有限公司 | Can improve thick-layer sandstone oil reservoir water drive ripples and well pattern structure of volume |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869334A (en) * | 2017-10-23 | 2018-04-03 | 中国石油天然气股份有限公司 | Layer system recombination and exploitation method of multi-layer sandstone oil reservoir in middle and later stages of water injection development |
| CN107869334B (en) * | 2017-10-23 | 2020-08-11 | 中国石油天然气股份有限公司 | Layer system recombination and exploitation method of multi-layer sandstone oil reservoir in middle and later stages of water injection development |
| CN110318719A (en) * | 2018-03-28 | 2019-10-11 | 中国石油化工股份有限公司 | A kind of two-way displacement method of positive rhythm thick formation |
| CN108952658A (en) * | 2018-07-03 | 2018-12-07 | 成都北方石油勘探开发技术有限公司 | Water injection well well choosing method for Fracturing Technology |
| CN108915649A (en) * | 2018-07-25 | 2018-11-30 | 大庆油田有限责任公司 | A kind of oil reservoir pressure is stifled to drive technology pattern preferred method |
| CN108915649B (en) * | 2018-07-25 | 2020-11-24 | 大庆油田有限责任公司 | Oil reservoir pressure plugging and flooding process mode optimization method |
| CN109113732A (en) * | 2018-08-09 | 2019-01-01 | 中国石油天然气股份有限公司 | Reservoir heterogeneity determination method and device |
| CN111749660A (en) * | 2019-03-29 | 2020-10-09 | 中国石油天然气股份有限公司 | Well pattern injection and production method and device |
| CN111749671A (en) * | 2019-03-29 | 2020-10-09 | 中国石油天然气股份有限公司 | Method and device for injection-production among development layers of well pattern |
| CN111749671B (en) * | 2019-03-29 | 2022-05-06 | 中国石油天然气股份有限公司 | Method and device for injection-production between development layers of well pattern |
| CN110454123A (en) * | 2019-08-08 | 2019-11-15 | 大港油田集团有限责任公司 | A kind of more wells collaboration energizations of LOW PERMEABILITY RESERVOIR are handled up method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107218024B (en) | 2019-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107218024B (en) | Method for adjusting rhombus inverted nine-point well pattern in high water-cut period of multilayer low-permeability sandstone oil reservoir | |
| CN105888630B (en) | Method for improving recovery efficiency by huff-puff oil recovery of tight oil fracturing horizontal well | |
| CN105114048B (en) | A kind of staged fracturing of horizontal well single-well injection-production oil production method | |
| CN103993862B (en) | Layering development method for complex fault block thin oil reservoir | |
| CN104989403B (en) | Method for reconstructing floor limestone aquifer into natural-artificial composite integrated aquiclude | |
| CN101876241B (en) | Method for improving water drive recovery ratio of positive rhythm thick oil layer | |
| CN102777157B (en) | CO2 drive oil-gas-water separate well injecting oil reservoir mixing drive development method | |
| CN104234677B (en) | Method for improving condensate recovery ratio of condensate gas reservoir through gas injection vertical displacement | |
| CN109958411B (en) | Horizontal well cluster perforation staged fracturing method | |
| CN103628850B (en) | A kind of waterflooding oil field integral profile control water blockoff decision-making technique | |
| CN104963671B (en) | A kind of fracturing reform method of High angle from formula well reservoir | |
| CN105822269B (en) | Remaining oil distribution pattern and modification scenario method after stratified reservoir binary is driven | |
| CN106761606B (en) | The asynchronous note CO of different well of symmetrical cloth seam2Oil production method | |
| CN104632157A (en) | Low permeability reservoir equilibrium displacement method | |
| CN106437674A (en) | Imitation horizontal well waterflooding well pattern adapting method | |
| CN106761612B (en) | The asynchronous water injection oil extraction method of double different wells of pressure break horizontal well of zip mode cloth seam | |
| CN108825177A (en) | A kind of horizontal well transfer drive technique | |
| CN106437642A (en) | Injection-production asynchronous mining method for horizontal well of fractured reservoir | |
| CN110306965A (en) | A kind of method for increasing for coal bed gas low yield wellblock | |
| CN104929597B (en) | Chemical flooding exploitation method for horizontal well | |
| CN104594869A (en) | reservoir reconstruction method | |
| CN105587300B (en) | Oil recovery method for horizontal well | |
| CN106869888B (en) | Improve the method for low-permeability oil deposit waterflooding effect | |
| CN110259421A (en) | Fractured compact oil reservoir water injection energy supplementing method | |
| CN110529089A (en) | A kind of open-hole horizontal well refracturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |