CN114086930B - Method for accelerating reuse of waste layer residual oil after aggregation by reinforced water injection - Google Patents
Method for accelerating reuse of waste layer residual oil after aggregation by reinforced water injection Download PDFInfo
- Publication number
- CN114086930B CN114086930B CN202010793223.3A CN202010793223A CN114086930B CN 114086930 B CN114086930 B CN 114086930B CN 202010793223 A CN202010793223 A CN 202010793223A CN 114086930 B CN114086930 B CN 114086930B
- Authority
- CN
- China
- Prior art keywords
- oil
- well
- layer
- water injection
- water
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000002347 injection Methods 0.000 title claims abstract description 45
- 239000007924 injection Substances 0.000 title claims abstract description 45
- 239000002699 waste material Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004220 aggregation Methods 0.000 title claims abstract description 15
- 230000002776 aggregation Effects 0.000 title claims abstract description 14
- 239000003921 oil Substances 0.000 claims abstract description 89
- 239000003129 oil well Substances 0.000 claims abstract description 23
- 239000010779 crude oil Substances 0.000 claims abstract description 16
- 230000005012 migration Effects 0.000 claims abstract description 13
- 238000013508 migration Methods 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 12
- 230000002349 favourable effect Effects 0.000 claims abstract description 9
- 238000004064 recycling Methods 0.000 claims abstract description 3
- 230000035699 permeability Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000000704 physical effect Effects 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 8
- 230000001965 increasing effect Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 2
- 230000005465 channeling Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention relates to the field of submergence and recovery ratio improvement in the later development stage of a water-flooding reservoir, in particular to a method for accelerating the reuse of residual oil in a waste layer after aggregation by reinforced water injection. The method comprises the following steps: step 1, determining a waste layer for recycling residual oil; step 2, optimizing a reinforced water injection mode of the water well; step 3, evaluating the enrichment effect of the residual oil; and 4, opening the oil well. The method of the invention promotes the residual crude oil in the oil layer to accelerate migration and aggregation to the high-position favorable region by carrying out intensified water injection on the waste layer, improves the effect of reusing the residual oil in the waste oil layer, achieves the aim of utilizing the found resources to the greatest extent, and provides a new thought for preserving and increasing the value of the existing assets in the oil field.
Description
Technical Field
The invention relates to the field of submergence and recovery ratio improvement in the later development stage of a water-flooding reservoir, in particular to a method for accelerating the reuse of residual oil in a waste layer after aggregation by reinforced water injection.
Background
At present, the eastern old oil field in China enters a high-water-content development stage, after years of water injection development, part of the dominant small layer enters a high-water-content waste stage, and from the view of yield statistical data, the extraction degree of the waste layer is generally less than 40%, and 60% of crude oil reserves remain underground and cannot be extracted. After long-term water injection development, most of the residual oil in the abandoned well layers is in a relatively dispersed state, and after a sufficiently long standing period, the dispersed residual oil can still be reagglomerated at the favorable positions of the oil reservoir, and the utilization of the mechanism for reagglomerating the residual oil is realized in the mine.
The existing method in the mine mainly comprises the steps of passively waiting for scattered residual oil to migrate to form an enrichment area and then using the enrichment area, wherein the aggregation period and the residual oil aggregation effect of the enrichment area depend on oil reservoir conditions excessively, and the obvious residual oil re-aggregation effect can be obtained in the mine generally in a period of years, so that the utilization efficiency is low. How to use the mechanism to realize the rapid aggregation and efficient utilization of the waste residual oil has not been an effective method.
Disclosure of Invention
The invention mainly aims to provide a method for accelerating the re-use of the accumulated waste oil in the waste well layer by strengthening water injection.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The invention provides a method for accelerating the reuse of residual oil in a waste layer after aggregation by reinforced water injection, which comprises the following steps:
step 1, determining a waste layer for recycling residual oil;
Step 2, optimizing a reinforced water injection mode of the water well;
step 3, evaluating the enrichment effect of the residual oil;
And 4, opening the oil well.
In order to achieve the above purpose, the present invention may further adopt the following technical scheme:
In step 1, the waste layer should satisfy the following conditions:
(1) The abandoned layer is provided with more than or equal to 1 port of an available oil well with good well condition in the layer, and the water well is more than or equal to 1 port;
(2) The available oil well should be located in the beneficial areas of residual oil migration and accumulation;
(3) The physical properties of the abandoned layer are good, the permeability of the reservoir is more than 200mD, and the viscosity of underground crude oil is less than 20 mPa.s.
Preferably, the beneficial areas for migration and accumulation of residual oil comprise a high-construction area, a high-forward micro-construction area and an area shielded by a seepage barrier at a high position of the oil well.
In the step 2, the method for optimizing the reinforced water injection mode of the water well comprises the following steps: and (5) analyzing the well condition of the abandoned layer well, and optimizing the well position of the reinforced water injection well and the well working system.
Preferably, the water injection-reinforced well should change at least one water injection direction compared with the original water flooding direction of the abandoned layer so as to increase the hydrodynamic force of the region with high oil phase permeability and accelerate the crude oil in the region with high saturation in the oil layer to gather in the favorable region.
Preferably, the water injection-enhanced well adopts a pulse type large-displacement water injection mode for injecting water. The water power in the oil reservoir can be changed by large amplitude pulse by adopting a pulse type large-displacement water injection mode for the water well, and the starting and migration of residual oil are facilitated.
In step 3, judging migration and enrichment change conditions of residual oil in the constructed favorable region by one or more of a new logging curve of the bypass of other layers, logging data of saturation of an old well and a numerical simulation method of a abandoned layer, and evaluating production conditions of the oil well after the well is opened in different stages.
In a specific oil reservoir and a development stage, namely the permeability, the water saturation and the viscosity of underground crude oil of the oil reservoir are fixed values, for scattered residual oil, the migration and aggregation speed (shown in the following formula) of the crude oil in a construction favorable direction is related to the hydrodynamic size, the oil-water density difference, the construction dip angle and the capillary seepage resistance, wherein the oil-water density difference, the construction dip angle and the capillary seepage resistance are the inherent properties of the oil reservoir, the oil reservoir can not be changed without modifying and converting the development mode, and the hydrodynamic size of the crude oil migration can be changed through water injection.
Wherein v of is the seepage velocity of scattered residual oil along the stratum direction, cm/s; k f is reservoir permeability, mD; k ro is the relative permeability of the oil phase, f; mu o is the viscosity of the underground crude oil, mPa.s; Δp is the pressure difference of water injection of scattered residual oil along the displacement direction and MPa; Δl is the length of scattered residual oil along the displacement direction, m; The dynamic gradient is produced by the oil-water density difference, and the pressure is MPa/m; Δp cow is the capillary resistance at two sides of scattered residual oil and MPa; ρ w is the formation water density, g/cm 3;ρo is the subsurface crude oil density, g/cm 3. Wherein,
The invention provides a method for accelerating the reuse of the accumulated residual oil of the waste layer by reinforcing water injection based on the knowledge of the driving mechanism.
Compared with the prior art, the invention has the following advantages:
The method of the invention promotes the residual crude oil in the oil layer to accelerate migration and aggregation to the high-position favorable region by carrying out intensified water injection on the waste layer, improves the effect of reusing the residual oil in the waste oil layer, achieves the aim of utilizing the found resources to the greatest extent, and provides a new thought for preserving and increasing the value of the existing assets in the oil field.
The method accelerates the reaggregation speed of the residual oil through manual intervention, solves the problem that the reaggregation of the residual oil is difficult to consider to be controlled, and realizes the efficient reuse of the residual oil of the waste layer.
The method provides technical support for the oil mining and the recovery ratio improvement of the residual oil in the later development stage of the water-driven reservoir, and particularly provides technical support for the reutilization of the residual oil of the ultra-high water content waste reservoir, and has wide popularization and application prospects and remarkable economic and social benefits.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a flow chart of a method for enhancing water injection to accelerate the re-use of the collected waste layer residual oil according to an embodiment of the invention;
FIG. 2 is a plan view of a facet in an embodiment of the invention;
FIG. 3 is a graph showing production curves of an oil well after opening according to an embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail with reference to specific embodiments.
As shown in fig. 1, fig. 1 is a flowchart of a method for accelerating the reuse of the accumulated residual oil of the waste layer by reinforced water injection according to the present invention.
In step 101, a discard layer for the surplus oil reuse is determined. The waste layer should satisfy the following conditions:
(1) The abandoned layer is provided with more than or equal to 1 port of an available oil well with good well condition in the layer, and the water well is more than or equal to 1 port;
(2) The available oil well should be located in the beneficial areas of residual oil migration and accumulation;
(3) The physical properties of the abandoned layer are good, the permeability of the reservoir is more than 200mD, and the viscosity of underground crude oil is less than 20 mPa.s.
The beneficial areas of the residual oil migration and accumulation comprise a constructed high-position and high-position forward micro-constructed area, and the high-position of the oil well is provided with a seepage barrier shielding area.
Fig. 2 is a plan view of a small layer of abandoned sand two 61 small layers in an oilfield. The oil layer is abandoned in the year 2016 and 4, the end oil well is H68-CX36, the end daily production liquid is 60t/d, the daily production oil is 0.7t/d, and the comprehensive water content is 98.7%. And analyzing the small layer to determine that the small layer accords with the screening conditions of accelerating the aggregation of the residual oil of the waste layer by strengthening water injection and then using the waste layer. The oil layer is provided with 2 reusable oil wells before being implemented, and the well conditions of the layer are good; 2 oil wells can be utilized to be positioned at the high part of the oil layer structure, and the condition of uniform aggregation of residual oil is provided; there are 2 wells for water injection. The average permeability of the oil layer was 750mD, and the viscosity of the crude oil under ground was 6.5 mPa.s. The oil-water well condition and the reservoir physical property condition meet the requirements.
In step 102, optimizing the water injection enhancement mode of the water well: and (5) analyzing the well condition of the abandoned layer well, and optimizing the well position of the reinforced water injection well and the well working system. Compared with the original water flooding direction of the abandoned layer, the reinforced water flooding well at least changes one water flooding direction so as to increase the hydrodynamic force of the region with high oil phase permeability and accelerate the crude oil in the region with high saturation in the oil layer to gather in the favorable region. The water injection well adopts a pulse type large-displacement water injection mode to inject water.
Before the oil layer is abandoned, water is injected into the water well H68X34 well at the layer, the enhanced water injection of the water well H68CX36 at the layer is added in consideration of the oil enrichment effect of a high saturation region, and the pulse water injection mode is that the first period is 70m 3/d and the second period is 40m 3/d; meanwhile, the water injection of the original water injection well H68X34 in the target interval is adjusted to be a pulse water injection mode, wherein the first period is 40m 3/d, and the second period is 70m 3/d. The pulse water injection period of the water well is 1 month. After the residual oil reaches the enrichment effect, the oil well is started for production, and in order to prevent water channeling, two water wells are subjected to injection downward adjustment, so that the oil layer production balance is maintained.
In step 103, the residual oil enrichment effect is evaluated. The method comprises the steps of evaluating the available oil wells of the oil layer, comprehensively considering the construction height and the current condition of the oil layer, determining and selecting an H68X48 well as a utilization oil well for reusing the residual oil of the abandoned layer, predicting the well to be opened at 30m 3/d for production through numerical simulation, predicting the daily oil of the well to be 2.5t/d if intensive water injection is not implemented, comprehensively containing 91.7% of water, predicting the daily oil of the well to be 5.5t/d after intensive water injection is implemented, comprehensively containing 81.7% of water, predicting the daily oil to be increased by 3t/d compared with the daily oil under the natural condition, reducing the water content by 10%, and obviously predicting the implementation effect.
In step 104, the well is opened. The economic benefit of the oil well H68X48 after well opening is measured, the yield of the crude oil 1460t can be increased within the effective period of the well, and the profit is expected to be increased by 68.7 ten thousand yuan according to the measurement of 50$/bbl of the oil price, so that the economic benefit is good. After economic benefit evaluation, the oil well implements the recovery measures on the small layer, after the recovery measures are implemented, the initial daily oil is 4.4t/d, the water content is 74.4 percent, the accumulated oil is 1095t, and the utilization effect of the enhanced water injection to accelerate the enrichment of residual oil is obvious.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (1)
1. A method for enhancing water injection to accelerate the reuse of residual oil in a waste layer after aggregation, which is characterized by comprising the following steps:
step 1, determining a waste layer for recycling residual oil;
Step 2, optimizing a reinforced water injection mode of the water well;
step 3, evaluating the enrichment effect of the residual oil;
step4, opening the oil well;
In step 1, the waste layer should satisfy the following conditions:
(1) The abandoned layer is provided with more than or equal to 1 port of an available oil well with good well condition in the layer, and the water well is more than or equal to 1 port;
(2) The available oil well should be located in the beneficial areas of residual oil migration and accumulation;
(3) The physical properties of the abandoned layer are good, the permeability of the reservoir is more than 200mD, and the viscosity of underground crude oil is less than 20 mPa.s;
the beneficial areas for migration and accumulation of the residual oil comprise a constructed high-position forward micro-constructed area and a constructed higher-position forward micro-constructed area, and the upper position of the oil well is provided with a seepage barrier shielding area;
In the step 2, the method for optimizing the reinforced water injection mode of the water well comprises the following steps: analyzing the well condition of the abandoned layer well, and optimizing the well position of the reinforced water injection well and the well working system; compared with the original water flooding direction of the abandoned layer, the reinforced water flooding well at least changes one water flooding direction so as to increase the hydrodynamic force of the region with high oil phase permeability and accelerate the crude oil in the region with high saturation in the oil layer to gather in the favorable region; the water injection well is filled with water in a pulse type large-displacement water injection mode;
In step 3, judging migration and enrichment change conditions of residual oil in the constructed favorable region by one or more of a new logging curve of the bypass of other layers, logging data of saturation of an old well and a numerical simulation method of a abandoned layer, and evaluating production conditions of the oil well after the well is opened in different stages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010793223.3A CN114086930B (en) | 2020-08-07 | 2020-08-07 | Method for accelerating reuse of waste layer residual oil after aggregation by reinforced water injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010793223.3A CN114086930B (en) | 2020-08-07 | 2020-08-07 | Method for accelerating reuse of waste layer residual oil after aggregation by reinforced water injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114086930A CN114086930A (en) | 2022-02-25 |
| CN114086930B true CN114086930B (en) | 2024-04-16 |
Family
ID=80295360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010793223.3A Active CN114086930B (en) | 2020-08-07 | 2020-08-07 | Method for accelerating reuse of waste layer residual oil after aggregation by reinforced water injection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114086930B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4159037A (en) * | 1978-05-01 | 1979-06-26 | Texaco Inc. | High conformance oil recovery process |
| RU2096596C1 (en) * | 1996-07-05 | 1997-11-20 | Акционерное общество открытого типа "Ноябрьскнефтегаз" | Method for development of oil deposit |
| 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 |
| CN104100246A (en) * | 2013-04-08 | 2014-10-15 | 中国石油化工股份有限公司 | Monolayer new chemical development method for thick-layer fault block oil reservoir in suspend production for years |
| CN104110241A (en) * | 2013-04-16 | 2014-10-22 | 中国石油化工股份有限公司 | Method for combination exploitation of multiple longitudinal small fault blocks by multiple-target directional well |
| CN104727790A (en) * | 2013-12-23 | 2015-06-24 | 中国石油化工股份有限公司 | Method for predicting period of re-enriching remaining oil of water flooding reservoir into new reservoir |
| CN108301813A (en) * | 2017-12-20 | 2018-07-20 | 中国石油化工股份有限公司 | The multilayer sandstone oil reservoir modification scenario method of scattered sand body development |
| CN110714755A (en) * | 2019-10-17 | 2020-01-21 | 中国石油化工股份有限公司 | Method for rapidly predicting secondary enrichment speed of residual oil in water-drive reservoir |
| CN111396021A (en) * | 2020-03-04 | 2020-07-10 | 中国石油天然气股份有限公司 | Well arrangement optimization method for newly drilled and encrypted well in old oil field developed by water injection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2010276423A1 (en) * | 2009-07-18 | 2012-03-01 | University Of Wyoming | Single-well diagnostics and increased oil recovery by oil injection and sequential waterflooding |
-
2020
- 2020-08-07 CN CN202010793223.3A patent/CN114086930B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4159037A (en) * | 1978-05-01 | 1979-06-26 | Texaco Inc. | High conformance oil recovery process |
| RU2096596C1 (en) * | 1996-07-05 | 1997-11-20 | Акционерное общество открытого типа "Ноябрьскнефтегаз" | Method for development of oil deposit |
| 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 |
| CN104100246A (en) * | 2013-04-08 | 2014-10-15 | 中国石油化工股份有限公司 | Monolayer new chemical development method for thick-layer fault block oil reservoir in suspend production for years |
| CN104110241A (en) * | 2013-04-16 | 2014-10-22 | 中国石油化工股份有限公司 | Method for combination exploitation of multiple longitudinal small fault blocks by multiple-target directional well |
| CN104727790A (en) * | 2013-12-23 | 2015-06-24 | 中国石油化工股份有限公司 | Method for predicting period of re-enriching remaining oil of water flooding reservoir into new reservoir |
| CN108301813A (en) * | 2017-12-20 | 2018-07-20 | 中国石油化工股份有限公司 | The multilayer sandstone oil reservoir modification scenario method of scattered sand body development |
| CN110714755A (en) * | 2019-10-17 | 2020-01-21 | 中国石油化工股份有限公司 | Method for rapidly predicting secondary enrichment speed of residual oil in water-drive reservoir |
| CN111396021A (en) * | 2020-03-04 | 2020-07-10 | 中国石油天然气股份有限公司 | Well arrangement optimization method for newly drilled and encrypted well in old oil field developed by water injection |
Non-Patent Citations (1)
| Title |
|---|
| 聚合物驱油藏剩余油综合调整措施研究;张海翔;海上疏松砂岩油田聚合物驱油藏精细描述及综合调整研究;第125-133页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114086930A (en) | 2022-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105626036B (en) | A kind of reasonable Liquid output reservoir engineering calculation method of determining oil reservoir | |
| CN102733789B (en) | Staged fracturing construction yield increment method for waterpower in deep thickened oil deposit thick-bedded sandstone storage layer | |
| CN105952427B (en) | A kind of prediction of low-permeability oil deposit water filling induced fractures and evaluation method | |
| CN102865060B (en) | Determining method of amount of shale oil deposit hydrofracture propping agent | |
| CN104234677B (en) | A kind of vertical displacement of gas injection improves gas condensate reservoir condensate recovery ratio method | |
| CN103046910B (en) | Ultra-high water cut stage reservoir water drive development approach | |
| CN103670350B (en) | A kind of variable intensity water injection exploitation method for carbonate fracture-cavity oil reservoir | |
| CN102052067B (en) | In-depth profile control step by step method employing equipressure drop gradient | |
| CN101122224A (en) | Gravity-assisted steam flooding exploitation method for heavy laver common heavy oil reservoir | |
| CN102287172A (en) | Oil extraction method for heavy oil reservoir | |
| CN107939357A (en) | Improve oilfield development system efficiency method | |
| CN106651158B (en) | Quantitative evaluation method for water injection development effectiveness degree of ultra-low permeability tight reservoir horizontal well | |
| CN107832540A (en) | A kind of compact oil reservoir technical limit well space determines method | |
| CN104727790A (en) | Method for predicting period of re-enriching remaining oil of water flooding reservoir into new reservoir | |
| CN110259421A (en) | A kind of broken up compact oil reservoir water filling supplement ENERGY METHOD | |
| CN104033137B (en) | Oilfield sewage is utilized to improve fault block oil reservoir recovery ratio method | |
| CN105134151B (en) | Hot nitrogen energization Viscosity Reduction And Stimulation | |
| CN102364041B (en) | Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture | |
| CN114086930B (en) | Method for accelerating reuse of waste layer residual oil after aggregation by reinforced water injection | |
| CN110118079A (en) | A kind of pressure break recovery method of high-content wax oil reservoir | |
| CN110630230B (en) | Development method for controlling water content of water flooding after ultra-high water content period | |
| CN104675372A (en) | Method for distributing polymer flooding injection rate and polymer flooding produced rate | |
| Su et al. | A new method to calculate sweep efficiency of horizontal wells in heterogeneous reservoir | |
| CN105298385A (en) | Drilling method of reinforcing-while-drilling shale | |
| CN105625992A (en) | Reasonable liquid extracting method specific to roof ridge fault block oil reservoir |
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 |