CN104847302A - Heavy oil reservoir cone-pressing water plugging method - Google Patents
Heavy oil reservoir cone-pressing water plugging method Download PDFInfo
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- CN104847302A CN104847302A CN201510131797.3A CN201510131797A CN104847302A CN 104847302 A CN104847302 A CN 104847302A CN 201510131797 A CN201510131797 A CN 201510131797A CN 104847302 A CN104847302 A CN 104847302A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000295 fuel oil Substances 0.000 title abstract 3
- 239000000126 substance Substances 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000007864 aqueous solution Substances 0.000 claims abstract description 6
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 6
- 235000018553 tannin Nutrition 0.000 claims abstract description 6
- 229920001864 tannin Polymers 0.000 claims abstract description 6
- 239000001648 tannin Substances 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims description 35
- 238000002347 injection Methods 0.000 claims description 35
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 28
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 14
- 239000001569 carbon dioxide Substances 0.000 claims description 14
- 239000010883 coal ash Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 67
- 230000000903 blocking effect Effects 0.000 abstract description 11
- 239000002981 blocking agent Substances 0.000 abstract description 4
- 239000010881 fly ash Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000003129 oil well Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000011161 development Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000010793 Steam injection (oil industry) Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000002028 premature Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 235000020681 well water Nutrition 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002349 well water Substances 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a thickened oil reservoir cone-pressing water plugging method, which comprises the following steps: determining an effluent oil layer caused by bottom water coning; injecting a predetermined amount of gas into the effluent oil layer; and injecting a chemical plugging agent into the water outlet oil layer after the gas is injected for selective water plugging. The chemical blocking agent consists of a first slug and a second slug, wherein the first slug consists of 0.4-0.5% of polyacrylamide, 2-3% of rubber particles and 1-3% of tannin extract powder by mass percentage concentration, and the second slug is an aqueous solution prepared from 15-25% of resin fly ash. According to the method for blocking water of the heavy oil reservoir by pressing the cone, before injecting the chemical blocking agent into the water outlet oil layer caused by bottom water coning for selective water blocking, gas with certain pressure is injected into the water outlet oil layer in advance, the injected gas preferentially occupies the top space of the water outlet oil layer, heavy oil at the top of the oil layer is driven to move downwards, and the quick cone pressing is realized.
Description
Technical field
The invention belongs to oil reservoir water-plugging technique field, particularly relate to a kind of heavy crude reservoir pressure cone shutoff method.
Background technology
Bottom water reservoir accounts for very large ratio in China's oil reservoir, and its reserves are quite abundant.Except having a large amount of natural bottom-water, along with oil field enter two, tertiary recovery, more the development features in heavy wool field constantly tends to the oil reservoir of end water type.Bottom water reservoir has the advantages that oil area all contacts with end water, and this is the place that bottom water reservoir is better than other oil reservoirs in exploitation, is also the where the shoe pinches of bottom water reservoir exploitation simultaneously.Oil reservoir and end water engaging surface amass large, and the ability that end water immerses oil reservoir is strengthened greatly, and the stratum energy that crude oil extraction consumes can be supplemented in time from end water, and most of bottom water reservoir all shows the feature of energy abundance at initial stage of development; But the existence of end water brings serious product water problems, in its manufacturing process to oil well production again, bottom water reservoir often show water breakthrough early, water-free oil production period is short, the feature of the fast even waterflooded reservoir of moisture content rising after water breakthrough, thus cause the recovery ratio of oil reservoir to reduce, oil mining risk increases.
Bottom water coning is very general phenomenon in Oil/gas Well is produced.Refer to Fig. 1.For straight well, when penetrating out the oil reservoir of bottom water reservoir, along with oil well is with certain yield production, can there is the tapered rising of oil-water interfaces in shaft bottom near zone, this phenomenon is called bottom water coning.Pressure Drop is created around pit shaft when the main cause of bottom water coning is oil well production, namely in recovery process, oil reservoir bottom defines direction close to vertical barometric gradient, due to density ratio oil large of water, make oil-water interfaces when tapered rising, hydrostatic pressure increases, if oil well output is less than critical output (end water has just bored oil well output when entering shaft bottom), water cone tends towards stability, but when oil well output exceedes critical output, production along with oil well is constantly risen by oil-water interfaces, and water cone becomes unstable, and rises until scurry into shaft bottom always.Therefore, oil well output is higher, and bottom water coning power is stronger, and oil well water breakthrough more early.Bottom water coning can make oil well premature water breakthrough, water saturation near shaft bottom is increased, reduces oleic permeability and cause water blocking.Oil well premature water breakthrough not only increases the weight of the load of well pump, and oil production is reduced, but also meeting erode downhole and ground installation; In addition oil well premature water breakthrough, increases the consumption of dehydration pumping plant workload and energy, cost for oil production is increased.
Compared to common bottom water reservoir, the heavy crude reservoir of end water energy abundance is subject to the impact of bottom water coning more very.Main cause is that comparatively conventional crude is larger for viscosity of thickened oil, aqueous phase stream kinetic force is considerably beyond the fluid ability of viscous crude oil phase, the oil reservoir water outlet phenomenon that bottom water coning causes is more outstanding, if can not effectively solve edge and bottom water invasion problem, will have a strong impact on the whole development effect of heavy crude reservoir.
After bottom water coning causes well water, first to determine water exit, then adopt shutoff method to carry out shutoff.Water-plugging technology can be divided into water pack off and the large class of chemical water shutoff two, and chemical water shutoff comprises again non-selective water blockoff and selective water plugging.Water pack off is with the water exit in packer and down-hole kit card oil sealing well, Ceng Cai lower floor can be sealed up, upper strata is adopted by envelope lower floor, or two is adopted in envelope intermediate layer and position, intermediate layer is adopted at envelope two, but the object of " only envelope is not blocked up " can only be reached, oil reservoir goes out water problem and is not fundamentally resolved, and the shortcoming such as water pack off needs that the packer used and corresponding kit thereof also exist complicated in mechanical structure, fragile, equipment runs and maintenance cost is high.Chemical water shutoff is that chemical plugging agent is injected water exit, and the material utilizing the chemical property of blocking agent or chemical reactant to change generation in the earth formation reaches shutoff formation water output duct, reduces oil well comprehensive water cut; Non-selective water blockoff is by deposit seed blocking duct, stratum mostly, this shutoff method, while stifled water outlet duct, by fuel-displaced duct in the lump shutoff, finally makes water outlet oil reservoir " be blocked ", this oil reservoir cannot produce oil again, and therefore non-selective water blockoff is not a kind of desirable water-plugging technology.Selective water plugging is by high molecular polymer or meets that water generates precipitation, the inorganic matter that solidifies is clamp-oned in stratum, hydrophilic group in high molecular polymer has affinity, adsorptivity to water after meeting water, expand, meet oil then to shrink, there is no suction-operated, meet water generate precipitation, the inorganic matter that solidifies then can shutoff formation water output duct, meet oil and can not produce precipitation or solidify, reach the object of " stifled and not dead ".Before employing selective water-plugging technology carries out water blockoff, usual reply cone enters water at the bottom of certain altitude and carries out pressure cone, and pressure cone method conventional is at present closing well pressure cone, closing well pressure cone is simple to operate, but the effect implemented after pressure cone is general all undesirable, not only well shut-in period can affect the oil production of oil well, and after driving a well, well water can be increased to again closing well fast and press the level before boring; In addition, the pressure cone power of closing well pressure cone is profit gravitational difference in stratum, by salinity and end water for a long time with the impact of the factor such as viscous crude contacts, the density of end water can trend towards the direction growth of viscous crude density, profit density contrast is caused to diminish, pressure cone power reduces, and pressure cone time and closed-in time extend, and finally affect output.
Summary of the invention
For the problems referred to above that oriented perforating exists, the invention provides a kind of heavy crude reservoir pressure cone shutoff method, its technical scheme is as follows:
A kind of heavy crude reservoir pressure cone shutoff method, comprises the following steps:
Determine the water outlet oil reservoir because bottom water coning causes;
Scheduled volume gas is injected to described water outlet oil reservoir;
Inject chemical plugging agent to the water outlet oil reservoir after injecting gas and carry out selective water plugging.
Heavy crude reservoir pressure cone shutoff method as above, described gas is air or carbon dioxide, and the injection pressure of described air or carbon dioxide is 8-15MPa.
Heavy crude reservoir pressure cone shutoff method as above, after completing selective water plugging, injects steam to the described oil reservoir completing stifled selective water plugging and carries out steam soak exploitation to described water outlet oil reservoir injection chemical plugging agent.
Heavy crude reservoir pressure cone shutoff method as above, the injection ratio of described steam and described air or carbon dioxide is 1:20-1:80.
Heavy crude reservoir pressure cone shutoff method as above, the injection ratio of described steam and described air or carbon dioxide is 1:50.
Heavy crude reservoir pressure cone shutoff method as above, described chemical plugging agent is made up of the first slug and the second slug, in mass percent concentration, wherein the first slug is made up of the rubber grain of 0.4-0.5% polyacrylamide, 2-3%, the tannin extract powder of 1-3%, and the second slug is the aqueous solution of the resin-oatmeal coal ash preparation of 15-25%.
Heavy crude reservoir pressure cone shutoff method as above, the first described slug injection rate is 300-500m
3, the second described slug injection rate is 100-150m
3.
Heavy crude reservoir pressure cone shutoff method as above, described chemical plugging agent injection pressure is 10-20Mpa.
For prior art adopt closing well to bore into end water carry out pressure cone time, pressure cone weak effect, pressure cone and closed-in time be long, the deficiency that affect oil well output, the invention provides a kind of heavy crude reservoir and press and bore shutoff method.Injecting before chemical plugging agent carries out selective water plugging in the water outlet oil reservoir caused because of bottom water coning, the gas with certain pressure is injected in advance in described water outlet oil reservoir, the gas injected preferentially occupies the headroom of water outlet oil reservoir, the viscous crude ordering about top of oil horizon moves downward, and realizes fast ram compression cone;
In addition, due to the existence of gas of injecting in advance, force the chemical plugging agent injected subsequently in oil reservoir lateral extension, thus add the blocking radius of chemical plugging agent; When steam soak exploitation is carried out in follow-up steam injection, the gas injected in advance can reduce its thermal energy exchange, steam is better heated the oil reservoir away from position, well point, thus increases the sweep area of steam, improve utilization rate and the steam soak development effectiveness of steam; When oil well turn adopt time, gas inclusions crude oil, makes viscosity of crude diminish, and reduces oil flow resistance, improves the production effect of oil well.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is straight well bottom water coning schematic diagram;
Fig. 2 is the flow chart of a kind of heavy crude reservoir pressure cone shutoff method of embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 2.A kind of heavy crude reservoir pressure cone shutoff method, comprises the following steps: determine the water outlet oil reservoir because bottom water coning causes; The gas of scheduled volume is injected to described water outlet oil reservoir; Chemical plugging agent is injected to the water outlet oil reservoir after injecting gas.
A kind of heavy crude reservoir pressure cone shutoff method of present embodiment, by injecting before chemical plugging agent carries out selective water plugging in the water outlet oil reservoir caused because of bottom water coning, the gas with certain pressure is injected in advance in described water outlet oil reservoir, the gas injected preferentially occupies the headroom of water outlet oil reservoir, the viscous crude ordering about top of oil horizon moves downward, and realizes fast ram compression cone.After completing selective water plugging to described water outlet oil reservoir injection chemical plugging agent, inject steam to the described oil reservoir completing selective water plugging and carry out steam soak exploitation.
Due to the existence of gas of injecting in advance, force the chemical plugging agent injected subsequently in oil reservoir lateral extension, thus add the blocking radius of blocking agent; When steam soak exploitation is carried out in follow-up steam injection, the gas of prior injection can reduce its thermal energy exchange, steam is better heated the oil reservoir away from position, well point, thus increases the sweep area of steam, improve utilization rate and the steam soak development effectiveness of steam; When oil well turn adopt time, gas inclusions crude oil, makes original viscosity diminish, and reduces oil flow resistance, improves the production effect of oil well.
For the gas that pressure is bored and inject in advance will meet certain thermal insulation, dilatancy and compressibilty, and source of the gas should extensively easily obtain, also should be taken into account the safety of cost and construction, comprehensive above-mentioned Consideration, what embodiment of the present invention selected injection is air or carbon dioxide, the needs of steam soak exploitation are carried out in the feature that injection rate should be grown in conjunction with heavy crude reservoir high angle fracture and follow-up steam injection, in present embodiment, the injection rate ratio of steam and air or carbon dioxide is comparatively suitable at 1:20-1:80, preferred proportion is 1:50, simultaneously in order to ensure that gas pressure cone can reach good effect before chemical water shutoff, the control of injection pressure of air or carbon dioxide is at 8-15MPa.
Described chemical plugging agent is made up of the first slug and the second slug, in mass percent concentration, wherein the first slug is made up of the rubber grain of 0.4-0.5% polyacrylamide, 2-3%, the tannin extract powder of 1-3%, and the second slug is the aqueous solution of the resin-oatmeal coal ash preparation of 15-25%.
The first described slug injection rate is 300-500m
3, the second described slug injection rate is 100-150m
3.Described chemical plugging agent injection pressure is 10-20Mpa.
Introduce the application of a kind of heavy crude reservoir pressure cone shutoff method in Practical Project of embodiment of the present invention below.
Pressure cone blocking water is carried out to certain oil field well.Design and construct according to above-mentioned implementation step, first inject air pressure cone: follow-up steam development phase steam injection amount of handling up is 1044m
3, be 1:50 according to the ratio of steam and air, design air injection rate 5.22 ten thousand m
3, rear because of pressure low, after-teeming air to 7.04 ten thousand m
3, injection pressure is raised to 12MPa and stops note, and bottom water coning height is reduced to-1031m by original-1025m; Inject chemical plugging agent and carry out selective water plugging: the first slug adopts 0.4% polyacrylamide, 2% rubber grain, and 1.8% tannin extract powder, add water mixture, injection rate 320m
3, injection pressure 16MPa, the second slug adopts 20% resin-oatmeal coal ash to be made into the aqueous solution, injection rate 100m
3, injection pressure rises to 17MPa.Inject steam to the oil reservoir completing selective water plugging and carry out steam soak exploitation: produce oil 893t of upper cycle, aquifer yield 7790t, after enforcement the inventive method carries out pressure cone blocking water, cycle produce oil 1624t, produces water 5086t, and the cycle contrasts, and increases oily 731t, precipitation 2704t.
Pressure cone blocking water is carried out to certain oil field well.Design and construct according to above-mentioned implementation step, first injecting carbon dioxide pressure cone: follow-up steam development phase steam injection amount of handling up is 1600m
3, according to the ratio of the 1:50 of steam and carbon dioxide, design carbon dioxide injection amount 80,000 m
3, note to 7.53 ten thousand m
3time, injection pressure is raised to 13MPa and stops note; Inject chemical plugging agent and carry out selective water plugging: the first slug adopts 0.5% polyacrylamide, 3% rubber grain, and 2.5% tannin extract powder, add water mixture, injection rate 300m
3, injection pressure 17MPa, the second slug adopts 25% resin-oatmeal coal ash to be made into the aqueous solution, injection rate 100m
3, injection pressure rises to 18MPa.Inject steam to the oil reservoir completing selective water plugging and carry out steam soak exploitation: produce oil 2272t of upper cycle, produce water 10186t, after enforcement the inventive method carries out pressure cone blocking water, cycle produce oil 2780t, produces water 8593t, and the cycle contrasts, and increases oily 508t, precipitation 1593t.
A kind of heavy crude reservoir pressure cone blocking water easy construction of embodiment of the present invention, success rate are high, and integrated cost falls and increases with benefit, and economic benefit increases fairly obvious, provide new effective ways for solving oriented perforating mid-later development phase High water cut problem.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various change or modification to the embodiment of the present invention according to content disclosed in application documents and not depart from the spirit and scope of the present invention.
Claims (8)
1. a heavy crude reservoir pressure cone shutoff method, is characterized in that comprising the following steps:
Determine the water outlet oil reservoir because bottom water coning causes;
Scheduled volume gas is injected to described water outlet oil reservoir;
Inject chemical plugging agent to the water outlet oil reservoir after injecting gas and carry out selective water plugging.
2. heavy crude reservoir pressure cone shutoff method as claimed in claim 1, it is characterized in that: described gas is air or carbon dioxide, the injection pressure of described air or carbon dioxide is 8-15MPa.
3. heavy crude reservoir pressure cone shutoff method as claimed in claim 2, is characterized in that: after completing selective water plugging to described water outlet oil reservoir injection chemical plugging agent, inject steam carry out steam soak exploitation to the described oil reservoir completing stifled selective water plugging.
4. heavy crude reservoir pressure cone shutoff method as claimed in claim 3, is characterized in that: the injection ratio of described steam and described air or carbon dioxide is 1:20-1:80.
5. heavy crude reservoir pressure cone shutoff method as claimed in claim 4, is characterized in that: the injection ratio of described steam and described air or carbon dioxide is 1:50.
6. heavy crude reservoir pressure cone shutoff method as claimed in claim 1, it is characterized in that: described chemical plugging agent is made up of the first slug and the second slug, in mass percent concentration, wherein the first slug is made up of the rubber grain of 0.4-0.5% polyacrylamide, 2-3%, the tannin extract powder of 1-3%, and the second slug is the aqueous solution of the resin-oatmeal coal ash preparation of 15-25%.
7. heavy crude reservoir pressure cone shutoff method as claimed in claim 6, is characterized in that: the first described slug injection rate is 300-500m
3, the second described slug injection rate is 100-150m
3.
8. heavy crude reservoir pressure cone shutoff method as claimed in claim 7, is characterized in that: described chemical plugging agent injection pressure is 10-20Mpa.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105332672A (en) * | 2015-11-17 | 2016-02-17 | 中国石油集团长城钻探工程有限公司 | Multi-element composite water-control oil-enhancement method for extracting oil |
| CN105484697A (en) * | 2015-12-22 | 2016-04-13 | 中国石油天然气股份有限公司 | Profile control channeling sealing method for super heavy oil reservoir |
| CN105804714A (en) * | 2016-04-01 | 2016-07-27 | 中国石油化工股份有限公司 | Production-increasing method adopting combination of in-situ gas generation and water plugging technology |
| CN109356561A (en) * | 2016-08-23 | 2019-02-19 | 中国石油化工股份有限公司 | A kind of method that heavy crude heat extraction gel foam inhibits bottom water to alter |
| CN111852394A (en) * | 2020-07-23 | 2020-10-30 | 西安诚科石油工程技术服务有限公司 | Method for blocking bottom water coning |
| CN113882837A (en) * | 2021-09-26 | 2022-01-04 | 中国石油大学(华东) | Water cone state simulation and water control and viscosity reduction experimental device and method for horizontal well of bottom water heavy oil reservoir |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332672A (en) * | 2015-11-17 | 2016-02-17 | 中国石油集团长城钻探工程有限公司 | Multi-element composite water-control oil-enhancement method for extracting oil |
| CN105484697A (en) * | 2015-12-22 | 2016-04-13 | 中国石油天然气股份有限公司 | Profile control channeling sealing method for super heavy oil reservoir |
| CN105484697B (en) * | 2015-12-22 | 2018-04-06 | 中国石油天然气股份有限公司 | Profile control channeling sealing method for super heavy oil reservoir |
| CN105804714A (en) * | 2016-04-01 | 2016-07-27 | 中国石油化工股份有限公司 | Production-increasing method adopting combination of in-situ gas generation and water plugging technology |
| CN109356561A (en) * | 2016-08-23 | 2019-02-19 | 中国石油化工股份有限公司 | A kind of method that heavy crude heat extraction gel foam inhibits bottom water to alter |
| CN111852394A (en) * | 2020-07-23 | 2020-10-30 | 西安诚科石油工程技术服务有限公司 | Method for blocking bottom water coning |
| CN113882837A (en) * | 2021-09-26 | 2022-01-04 | 中国石油大学(华东) | Water cone state simulation and water control and viscosity reduction experimental device and method for horizontal well of bottom water heavy oil reservoir |
| CN113882837B (en) * | 2021-09-26 | 2024-02-02 | 中国石油大学(华东) | Water cone morphological simulation and water control viscosity reduction experimental device and method for bottom water heavy oil reservoir horizontal well |
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