CN106909717A - Method for determining main oil production layer of lake-phase low-abundance and multi-production-layer compact oil field - Google Patents
Method for determining main oil production layer of lake-phase low-abundance and multi-production-layer compact oil field Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
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- 208000035126 Facies Diseases 0.000 claims abstract description 48
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 238000000280 densification Methods 0.000 claims description 43
- 230000001186 cumulative effect Effects 0.000 claims description 37
- 230000015572 biosynthetic process Effects 0.000 claims description 26
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- 238000007654 immersion Methods 0.000 claims description 3
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Abstract
The invention provides a method for determining a main oil-producing layer of a lake-phase low-abundance and multi-producing-layer compact oil field, which comprises the following steps: obtaining core test results of each layer of a typical lake-facies low-abundance tight oil field of a multi-producing zone, well drilling oil gas display data, single well logging interpretation results of all single wells, single well test yield and single well oil extraction accumulated yield; determining a selection standard of the high-yield and stable-yield well according to the acquired data, and selecting the high-yield and stable-yield well in all the single wells; judging the development interval and display grade of the reservoir where the high-yield and stable-yield well is located, the reservoir physical property, oil content and crack development degree of the development interval of the reservoir where the high-yield and stable-yield well is located, and the source storage configuration relation of the reservoir where the high-yield and stable-yield well is located; and determining a main oil production layer according to the judgment indexes and the corresponding preset weight coefficients. The method provided by the invention can determine the main oil producing layer of the lake-facies low-abundance and multi-zone compact oil field, and reduce the exploration and development cost and the development risk.
Description
Technical field
The present invention relates to oil-gas mining technical field, more particularly to a kind of low abundance of lacustrine facies, the multilayered reservoir densification oil field main force
The determination method of oil-producing formation.
Background technology
With the deep layer of conventional oil-gas reservior's exploration ＆ exploitation object, hiddenization, complicate, to realize crude output stable yields,
Upper product difficulty is increasing.With recognize in geological theory deeply, innovation and technology constantly improve, aboundresources,
The big densification oil just frontier as oil exploration of reserves.The Sichuan Basin fine and close oil stock number of Jurassic lacustrine Daanzhai member is accounted for
More than the 60% of the fine and close oil stock number in basin, oil-bearing layer is vertical more on longitudinal direction and disperses.Fine and close oil is because reservoir porosity is poor, infiltration
The features such as rate is extremely low, pore throat is tiny, non-average is strong, causes fluid neuron network resistance big, flow difficulties in recovery process.Both at home and abroad
Fine and close exploration activity Development Practice shows that the fine and close effective development technique in oil field is transformed using horizontal well volume fracturing technology
And production.Therefore for the low abundance of lacustrine facies, the fine and close oil field of multilayered reservoir, it is thus necessary to determine that main force's oil-producing well, to reduce exploration and development
Cost and exploitation risk.
At present, do not set up a kind of suitable for the low abundance of lacustrine facies, the determination side of multilayered reservoir densification oil field main force oil-producing formation also
Method, in fine and close oil field development, cost of exploration ＆ development and development risk are higher.
The content of the invention
In view of this, the present invention provides a kind of low abundance of lacustrine facies, the determination method of multilayered reservoir densification oil field main force oil-producing formation,
The low abundance of lacustrine facies, main force's oil-producing formation of multilayered reservoir densification oil well are can determine that, so as to reduce cost of exploration ＆ development and development risk.
Specifically, including following technical scheme：
The invention provides a kind of low abundance of lacustrine facies, the determination method of multilayered reservoir densification oil field main force oil-producing formation, including：
Obtain the typical low abundance of lacustrine facies, each layer core test result in multilayered reservoir densification oil field, drilling well oil/gas show data,
The low abundance of typical lacustrine facies, the individual well well log interpretation achievement of all individual wells in multilayered reservoir densification oil field, individual well test yield, list
Well oil recovery cumulative production；
Individual well according to the typical low abundance of lacustrine facies, all individual wells in multilayered reservoir densification oil field tests yield and single well
Oily cumulative production, determines the selection standard of stable high yield well；
According to the selection standard of the stable high yield well, the fine and close oil field of the low abundance of typical lacustrine facies, multilayered reservoir is determined
Stable high yield well in all individual wells；
Drilling well oil/gas show data according to the stable high yield well, judge the development of reservoir where the stable high yield well
Interval and display level；
Individual well well log interpretation achievement according to the stable high yield well, determines the development of reservoir where the stable high yield well
The reservoir properties of interval, oiliness and development degree of micro cracks in oil；
Individual well well log interpretation achievement according to the stable high yield well, obtains the source storage of reservoir where the stable high yield well
Configuration relation；
Hair according to where the development interval and display level, the stable high yield well of reservoir where the stable high yield well
Educate reservoir properties, oiliness and development degree of micro cracks in oil, the source storage configuration relation of the stable high yield well, each layer rock of interval
Heart test result and corresponding default weight coefficient, determine main force's oil-producing formation.
Selectively, the individual well according to the typical low abundance of lacustrine facies, all individual wells in multilayered reservoir densification oil field is surveyed
Test manufacture amount and single well production cumulative production, determine the selection standard of stable high yield well, including：
It is tired according to the typical low abundance of lacustrine facies, the individual well test yield of all individual wells in multilayered reservoir densification oil field and individual well
Yield is counted, fitting obtains testing the regression curve of yield and cumulative production, added up according to default cumulative production value and described presetting
Yield values corresponding test yield values on the test regression curve of the yield with cumulative production, determine the choosing of stable high yield well
Take standard.
Selectively, the selection standard of the stable high yield well is：Individual well cumulative production value is more than the default accumulative product
Value, and individual well test yield values are bent with the recurrence of cumulative production in the test yield more than the default cumulative production value
Corresponding test yield values on line.
Selectively, the development interval includes sub- section, substratum.
Selectively, the display level includes gas logging abnormal, gas leaching, oil immersion, well kick and leakage.
Selectively, the development interval and display level, the high yield of the reservoir according to where the stable high yield well
The reservoir properties of the development interval of reservoir where stable yields well, oiliness and development degree of micro cracks in oil, the source storage of the stable high yield well
Configuration relation, each layer core test result and corresponding default weight coefficient, determine main force's oil-producing formation, including：
It is development interval and corresponding first numerical value of display level according to reservoir where the stable high yield well, described
The reservoir properties for developing interval, oiliness and the corresponding second value of development degree of micro cracks in oil, the height where stable high yield well
Produce the corresponding third value of source storage configuration relation, corresponding 4th numerical value of each layer core test result and the correspondence of stable yields well
Default weight coefficient, where obtaining the stable high yield well each development interval comprehensive numerical value, so that it is determined that the main force produce
Oil reservoir.
Selectively, each layer core test result includes core observation description record, rock core physical data, thin slice mirror
Fixed number evidence, lithification analyze data, X diffraction analysis datas and pressure mercury supplemental characteristic.
Selectively, the individual well well log interpretation achievement according to the stable high yield well, obtains the stable high yield well
The source storage configuration relation of place reservoir, including：
Individual well well log interpretation achievement according to the stable high yield well, analysis hydrocarbon source rock parameter is closed with the configuration of reservoir parameter
System, obtains the source storage configuration relation of reservoir where the stable high yield well.
The beneficial effect of technical scheme provided in an embodiment of the present invention：
The invention provides a kind of low abundance of lacustrine facies, the determination method of multilayered reservoir densification oil field main force oil-producing formation, according to allusion quotation
The low abundance of type lacustrine facies, each layer core test result in multilayered reservoir densification oil field, drilling well oil/gas show data, typical lacustrine facies are low rich
Degree, the individual well well log interpretation achievement of all individual wells in multilayered reservoir densification oil field, individual well test yield, single well production cumulative production,
The low abundance of lacustrine facies, all stable high yield wells in multilayered reservoir densification oil field are chosen, and determines the development of reservoir where stable high yield well
Interval and display level, the reservoir properties of the development interval of stable high yield well place reservoir, oiliness and development degree of micro cracks in oil, height
The source storage configuration relation of reservoir where stable yields well is produced, and then determines the low abundance of the lacustrine facies, main force's oil-producing in multilayered reservoir densification oil field
Layer, so as to reduce cost of exploration ＆ development and development risk.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Accompanying drawing 1 is a kind of low abundance of lacustrine facies, the determination of multilayered reservoir densification oil field main force oil-producing formation in one embodiment of the invention
The flow chart of method；
Accompanying drawing 2 is A sections of the X oil fields block diagram of reservoir integrated information in one embodiment of the invention；
Accompanying drawing 3 is the regression curve of the test yield with cumulative production of A sections of X oil fields reservoir in one embodiment of the invention；
Accompanying drawing 4 is the contrast of the well log interpretation achievement of A sections of X oil fields 9 mouthfuls of stable high yield wells of reservoir in one embodiment of the invention
Figure；
Accompanying drawing 5 is that A section of X oil fields reservoir longitudinally goes up the individual well sources of 9 mouthfuls of stable high yield oil wells and stores up and match somebody with somebody in one embodiment of the invention
Put graph of a relation.
Specific embodiment
To make technical scheme and advantage clearer, below in conjunction with accompanying drawing embodiment of the present invention is made into
One step ground is described in detail.
One embodiment of the invention provides a kind of low abundance of lacustrine facies, the determination side of multilayered reservoir densification oil field main force oil-producing formation
Method, as shown in figure 1, including step S101, S102, S103, S104, S105, S106 and S107.
Step S101：Obtain the low abundance of typical lacustrine facies, each layer core test result, the drilling well oil gas in multilayered reservoir densification oil field
Display data, the low abundance of typical lacustrine facies, the individual well well log interpretation achievement of all individual wells in multilayered reservoir densification oil field, individual well test are produced
Amount, single well production cumulative production.
In this step, each layer core test result includes core observation description record, rock core physical data, thin section identification
Data, lithification analyze data, X diffraction analysis datas and pressure mercury supplemental characteristic.
It is objective for implementation to choose X oil field A section densifications oil field.The fine and close oil field stratum thickness in A sections of X oil fields is 70-90m, is buried
Depth 2400-2500m, its lithology group shows the deposition characteristicses of a set of shallow-half deep lacustrine facies black shale and biogenic limestone alternating layers.
In half deep lake mud of big Sanya section, reservoir major developmental is situated between hydrocarbon source rock major developmental in the shelly limestone of big by one, big Sanya section
Muschelkalk thickness 5-20m, reservoir matrix sillar porosity is generally less than 2%, and permeability is generally less than 0.1 × 10-4μm2, individual other style
More than 1 × 10-3μm2More with the presence of crack, generally, A sections of X oil fields reservoir is the ultralow hole of lacustrine facies, oozes reservoir.As shown in Fig. 2 being
A sections of the X oil fields block diagram of oil reservoir integrated information.
Step S102：According to the low abundance of typical lacustrine facies, multilayered reservoir densification oil field all individual wells individual well test yield and
Single well production cumulative production, determines the selection standard of stable high yield well.
In this step, the individual well according to the low abundance of typical lacustrine facies, all individual wells in multilayered reservoir densification oil field tests yield
And individual well cumulative production, fitting obtains testing the regression curve of yield and cumulative production, according to default cumulative production value and default
Cumulative production value corresponding test yield values on test regression curve of the yield with cumulative production, determine the choosing of stable high yield well
Take standard：Individual well cumulative production value is more than default cumulative production value, and individual well test yield values are more than default cumulative production value
The corresponding test yield values on test regression curve of the yield with cumulative production.
Specifically, settable default cumulative production is 10,000 tons.
As shown in figure 3, being the test yield and the regression curve of cumulative production of A sections of X oil fields reservoir, tire out on this curve
Meter yield is that the corresponding test yield of 10,000 ton hours is 8 ton days, then can determine that the selection standard of stable high yield well is test yield
It is more than 10,000 tons more than 8 ton days, cumulative production.
Step S103：According to the selection standard of stable high yield well, it is determined that the low abundance of typical lacustrine facies, multilayered reservoir densification oil field
Stable high yield well in all individual wells.
According to the selection standard of stable high yield well, A sections of X oil fields reservoir selects 11,17,26,47,35,57,003-1,
Nine mouthfuls of stable high yield wells of 026-1,108x.
Step S104：Drilling well oil/gas show data according to stable high yield well, judge the hair of reservoir where stable high yield well
Educate interval and display level.
In this step, display level includes gas logging abnormal, gas leaching, oil immersion, well kick and leakage, and development interval includes Asia
Section, substratum.
The drilling well display data of A sections of the 9 of the reservoir mouthfuls of stable high yield wells in X oil fields is as shown in the table：
As can be seen that the display interval of 9 mouthfuls of stable high yield wells is mainly distributed on big Sanya section shelly limestone, display level compared with
Height, predominantly gas soak and more than.
Step S105：Individual well well log interpretation achievement according to stable high yield well, the germinal layer where determining stable high yield well
The reservoir properties of section, oiliness and development degree of micro cracks in oil.
According to the well log interpretation achievement of A sections of X oil fields 9 mouthfuls of stable high yield wells of reservoir, storage is counted respectively by sub- section or substratum
Layer porosity, permeability, oil saturation, fracture development index, as shown in figure 4, being A sections of X oil fields 9 mouthfuls of stable high yield wells of reservoir
Well log interpretation achievement comparison diagram.Comprehensive analysis shows that big Sanya section reservoir properties are of a relatively high, and development degree of micro cracks in oil is high.
Step S106：Individual well well log interpretation achievement according to stable high yield well, the source storage configuration for obtaining stable high yield well is closed
System.
According to A sections of X oil fields 9 mouthfuls of log analysis datas of stable high yield oil well of reservoir, the upper 9 mouthfuls of stable high yield oil in longitudinal direction is set up
The individual well source storage configuration relation figure of well, as shown in Figure 5.Analysis hydrocarbon source rock parameter (organic carbon content and hydrocarbon source rock thickness) and reservoir
The configuration relation of parameter (reservoir porosity, reservoir permeability, fracture development index), respectively obtains 9 mouthfuls of stable high yield oil wells
Configuration relation is stored up in source, and is carried out source storage configuration relation with reference to cumulative oil production and be analyzed, and determines that the storage configuration of best source is closed
System, the main force producing horizon on further clear and definite longitudinal direction is big Sanya section.
Step S107：Storage where development interval and display level, the stable high yield well of reservoir according to where stable high yield well
The reservoir properties of interval of layer, oiliness and development degree of micro cracks in oil, the source storage configuration relation of stable high yield well, each layer core test
Result and corresponding default weight coefficient, determine main force's oil-producing formation.
Specifically, according to the development interval and corresponding first numerical value of display level, high yield of stable high yield well place reservoir
The reservoir properties of the interval of reservoir, oiliness and the corresponding second value of development degree of micro cracks in oil, stable high yield well where stable yields well
The corresponding third value of source storage configuration relation, corresponding 4th numerical value of each layer core test result and corresponding default weight system
Number, obtains the comprehensive numerical value of each interval of reservoir where stable high yield well, so that it is determined that main force's oil-producing formation.
In this step, can rule of thumb respectively to the development interval and display level, height of reservoir where stable high yield well
Produce the reservoir properties of the development interval of reservoir, oiliness and development degree of micro cracks in oil where stable yields well, the source storage of stable high yield well is matched somebody with somebody
Put relation and each layer core test result this four indices are given a mark respectively, so as to obtain each single item index pair of each reservoir
The score answered, further according to the corresponding weight coefficient of each single item index, obtains the score of each reservoir, and then determine main force's oil-producing
Layer.
In this step, reservoir where development interval and display level, the stable high yield well of reservoir where stable high yield well
The development reservoir properties of interval, oiliness and development degree of micro cracks in oil, source storage configuration relation and each layer rock core of stable high yield well
The corresponding weight coefficient of this four indices of test result can be 0.2,0.2,0.2,0.4, but the invention is not restricted to this, can be according to reality
Border situation determines the weight coefficient of four indices.
The final main force's oil-producing formation for determining X oil field A section reservoirs is big Sanya section.
A kind of low abundance of lacustrine facies, the determination method of multilayered reservoir densification oil field main force oil-producing formation that the present embodiment is provided, according to
The typical low abundance of lacustrine facies, each layer core test result in multilayered reservoir densification oil field, drilling well oil/gas show data, typical lacustrine facies are low rich
Degree, the individual well well log interpretation achievement of all individual wells in multilayered reservoir densification oil field, individual well test yield, single well production cumulative production,
The low abundance of lacustrine facies, all stable high yield wells in multilayered reservoir densification oil field are chosen, and determines the development of reservoir where stable high yield well
Interval and display level, the reservoir properties of the development interval of stable high yield well place reservoir, oiliness and development degree of micro cracks in oil, height
The source storage configuration relation of reservoir where stable yields well is produced, and then determines the low abundance of the lacustrine facies, main force's oil-producing in multilayered reservoir densification oil field
Layer, so as to cost of exploration ＆ development and development risk can be reduced.
The above is for only for ease of it will be understood by those skilled in the art that technical scheme, is not used to limit
The present invention.All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in this
Within the protection domain of invention.
Claims (8)
1. a kind of low abundance of lacustrine facies, the determination method of multilayered reservoir densification oil field main force oil-producing formation, it is characterised in that including：
Obtain the typical low abundance of lacustrine facies, each layer core test result in multilayered reservoir densification oil field, drilling well oil/gas show data, described
The typical low abundance of lacustrine facies, the individual well well log interpretation achievement of all individual wells in multilayered reservoir densification oil field, individual well test yield, single well
Oily cumulative production；
It is tired according to the typical low abundance of lacustrine facies, the individual well test yield of all individual wells in multilayered reservoir densification oil field and single well production
Meter yield, determines the selection standard of stable high yield well；
According to the selection standard of the stable high yield well, all of the fine and close oil field of the low abundance of typical lacustrine facies, multilayered reservoir are determined
Stable high yield well in individual well；
Drilling well oil/gas show data according to the stable high yield well, judge the development interval of reservoir where the stable high yield well
And display level；
Individual well well log interpretation achievement according to the stable high yield well, determines the development interval of reservoir where the stable high yield well
Reservoir properties, oiliness and development degree of micro cracks in oil；
Individual well well log interpretation achievement according to the stable high yield well, obtains the source storage configuration of reservoir where the stable high yield well
Relation；
Germinal layer according to where the development interval and display level, the stable high yield well of reservoir where the stable high yield well
The reservoir properties of section, oiliness and development degree of micro cracks in oil, the source storage configuration relation of the stable high yield well, each layer rock core are surveyed
Test result and corresponding default weight coefficient, determine main force's oil-producing formation.
2. the low abundance of lacustrine facies according to claim 1, the determination method of multilayered reservoir densification oil field main force oil-producing formation, its feature
It is that the individual well according to the typical low abundance of lacustrine facies, all individual wells in multilayered reservoir densification oil field tests yield and individual well
Oil recovery cumulative production, determines the selection standard of stable high yield well, including：
According to the typical low abundance of lacustrine facies, the individual well test yield of all individual wells in multilayered reservoir densification oil field and the accumulative product of individual well
Amount, fitting obtains testing the regression curve of yield and cumulative production, according to default cumulative production value and the default cumulative production
Value corresponding test yield values on the test regression curve of the yield with cumulative production, determine the selection mark of stable high yield well
It is accurate.
3. the low abundance of lacustrine facies according to claim 2, the determination method of multilayered reservoir densification oil field main force oil-producing formation, its feature
It is that the selection standard of the stable high yield well is：Individual well cumulative production value is more than the default cumulative production value, and individual well
Test yield values are more than the default cumulative production value corresponding survey on the test regression curve of the yield with cumulative production
Test manufacture value.
4. the low abundance of lacustrine facies according to claim 1, the determination method of multilayered reservoir densification oil field main force oil-producing formation, its feature
It is that the development interval includes sub- section, substratum.
5. the low abundance of lacustrine facies according to claim 1, the determination method of multilayered reservoir densification oil field main force oil-producing formation, its feature
It is that the display level includes gas logging abnormal, gas leaching, oil immersion, well kick and leakage.
6. the low abundance of lacustrine facies according to claim 1, the determination method of multilayered reservoir densification oil field main force oil-producing formation, its feature
It is, storage where development interval and display level, the stable high yield well of the reservoir according to where the stable high yield well
It is the development reservoir properties of interval of layer, oiliness and development degree of micro cracks in oil, the source storage configuration relation of the stable high yield well, described
Each layer core test result and corresponding default weight coefficient, determine main force's oil-producing formation, including：
The development interval and corresponding first numerical value of display level, the high yield of reservoir according to where the stable high yield well
The reservoir properties for developing interval, oiliness and the corresponding second value of development degree of micro cracks in oil, the high yield where stable yields well are steady
Produce the corresponding third value of source storage configuration relation of well, corresponding 4th numerical value of each layer core test result and corresponding pre-
If weight coefficient, the comprehensive numerical value of each development interval where obtaining the stable high yield well, so that it is determined that main force's oil-producing formation.
7. the low abundance of lacustrine facies according to claim 1, the determination method of multilayered reservoir densification oil field main force oil-producing formation, its feature
It is that each layer core test result includes core observation description record, rock core physical data, thin section identification data, lithification
Analyze data, X diffraction analysis datas and pressure mercury supplemental characteristic.
8. the low abundance of lacustrine facies, multilayered reservoir densification oil field main force oil-producing formation according to claim 1-7 any of which is really
Determine method, it is characterised in that the individual well well log interpretation achievement according to the stable high yield well, obtain the stable high yield well
The source storage configuration relation of place reservoir, including：
The configuration relation of the individual well well log interpretation achievement according to the stable high yield well, analysis hydrocarbon source rock parameter and reservoir parameter,
Obtain the source storage configuration relation of reservoir where the stable high yield well.
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| CN111749687A (en) * | 2020-07-23 | 2020-10-09 | 中海石油国际能源服务(北京)有限公司 | Method, device and equipment for determining main force horizon of multilayer oil reservoir and storage medium |
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