CN113309505B - Weathered crust karst reservoir water injection well flow passage adjusting method - Google Patents
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- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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Abstract
The invention discloses a method for adjusting a water injection well flow passage of a weathered crust karst reservoir, which relates to the field of oil and gas resource development, and comprises the steps of analyzing the static communication relation of a water injection well group according to the characteristics of the weathered crust karst reservoir, analyzing the dynamic effect relation of the water injection well group according to the characteristics of the weathered crust karst reservoir, judging a fracture-cavity combination model of the well group according to the analysis results of S1 and S2, determining a flow passage adjusting scheme according to the judged fracture-cavity combination model, selecting a flow passage adjusting agent according to the adjusting scheme, determining an injection slug and a construction process according to the selected flow passage adjusting agent, determining a water injection scheme according to the determined injection slug and the construction process, and determining a well opening scheme; by using the scheme provided by the patent, the flow channel scheme of the water injection well group is adjusted according to the characteristics of the surface weathered crust oil reservoir of the Tahe carbonatite, so that the water injection efficient development of the karst oil reservoir of the Tahe weathered crust is ensured, and the process success rate of the oil reservoir is increased to 100%.
Description
Technical Field
The invention relates to the field of oil and gas resource development, in particular to a method for adjusting a water injection well group flow channel of a Tahe carbonate rock surface layer weathering crust oil reservoir and ensuring efficient water injection development of the Tahe weathering crust karst oil reservoir.
Background
The document (Rong Yuan Shuai, carbonate fracture-cavity type reservoir residual oil distribution mode and potential excavation strategy [ J ]. Petroleum institute, 2014,35 (6): 1138-1146) proposes a carbonate reservoir 7 major-class 13-subclass residual oil distribution mode on the basis of reservoir fine description, test and production dynamic data analysis from the actual reservoir for solving the problem that the residual oil distribution in the middle and later development stages is not clear due to the fracture-cavity structure of the carbonate fracture-cavity type reservoir in the Tahe oil field. And combines production practice, and proposes a residual oil submergence strategy aiming at different residual oil distribution modes: carrying out excavation and submergence on various residual oil in the non-well control fracture holes between the wells with larger well spacing by deploying a new well or by utilizing lateral drilling of an old well; various residual oil with small well spacing is purposefully excavated and submerged by utilizing conventional measures; large-scale acid fracturing, hydraulic expansion, drainage oil extraction and gas injection oil displacement are respectively the effective potential excavation which is unique to the separated fracture-cavity type and attic type residual oil.
The documents (main factors of residual oil distribution and enhanced recovery ratio approach [ J ] after water flooding of a fracture-cavity type carbonate reservoir in a Tahe oil field, oil exploration and development, 2019,46 (4): 746-754) the main factors of residual oil distribution after water flooding of the fracture-cavity type carbonate reservoir can be classified into 4 categories of local high points, insufficient well control, shielding of a communicating channel and weak water power. In the middle and later stages of water injection development, according to the main control factors and the distribution characteristics of the distribution of the residual oil, the precise excavation and the submergence are implemented by means of strengthening well control, utilizing the gravity differentiation and the capillary suction effect, disturbing (transforming) a flow field and the like.
Patent CN107387042B (method for improving recovery efficiency in middle and later periods of secondary recovery of carbonate reservoir) reports a method for improving recovery efficiency in middle and later periods of secondary recovery of carbonate reservoir, and the method determines the geological type of residual oil in the middle and later periods of secondary recovery of carbonate reservoir according to the carbonate reservoir, geological data, oil well drilling conditions and production characteristics; judging the occurrence mode of the residual oil according to the cumulative production condition of the oil well, the secondary oil extraction measures and the failure condition; and aiming at different types of the residual oil, different oil-benefiting and water-weakening schemes are adopted, wherein the types of the residual oil are jointly defined by the geological types of the residual oil and the occurrence modes of the residual oil, different materials for oil-benefiting and water-weakening are selected for the different oil-benefiting and water-weakening schemes, and different injection processes are selected for the selected different materials.
Patent CN108625833A (method for modifying water drive by flow channel adjustment of fracture-cavity carbonate reservoir) reports a method for modifying water drive by flow channel adjustment of fracture-cavity carbonate reservoir, which includes the following steps: determining a fracture-cavity body needing to be adjusted, and selecting an adaptive flow channel regulating agent according to injection and production characteristics of different types of fracture-cavity bodies; carrying out on-site injection test on the selected degradable flow regulating agent so as to carry out formation matching test; injecting the tested adaptive flow regulating agent into the water drive flow passage on site, wherein the flow regulating agent moves along with the passage of injected water, and is blocked or settled and accumulated in the crack passage to realize a shrinkage or crack dominant water injection passage; the recovery unit is injected with water, and the injected water is mainly driven along the secondary channel or the secondary channel, so that the unit water drive development effect is improved. The method can effectively adjust the water drive dominant channel, uses the residual oil of the secondary channel, and is suitable for fracture-cavity carbonate reservoirs. And the on-site test effect is good, and the method is particularly suitable for improving the water flooding development effect after water injection of the fracture-cavity carbonate rock oil reservoir.
As mentioned above, the literature and patent do not make targeted research on the weathering crust oil reservoir, and therefore, an economical and effective flow channel adjustment method is found for the weathering crust oil reservoir, which is a key for exploiting residual oil between wells of the reservoir to improve the recovery ratio of the carbonate reservoir.
Disclosure of Invention
The embodiment of the invention provides a method for adjusting a flow channel of a water injection well of a weathered crust karst reservoir. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the embodiments of the present invention, there is provided a method for adjusting a flow channel of an injection well of a reservoir of a weathering crust karst, including:
s1: analyzing the static communication relation of the water injection well group according to the characteristics of the weathered crust karst reservoir (karst background, seismic data, geological reservoir data, drilling data, well logging curves, interwell reservoir portrayal and static data);
s2: analyzing the dynamic effect relationship of the water injection well group according to the characteristics (production data, water injection data and tracer data) of the weathered crust karst oil reservoir;
s3: judging a fracture-cave combination model of the well group according to the analysis results of the S1 and the S2;
s4: determining a flow passage adjusting scheme according to the judged slot-hole combination model;
s5: selecting a flow channel adjusting agent according to an adjusting scheme;
s6: determining an injection slug and a construction process according to the selected flow channel adjusting agent;
s7: and determining a water injection scheme and a well opening scheme according to the determined injection slug and the construction process.
Preferably, the analysis of the static communication relationship of the water injection well group is specifically as follows:
and determining all reservoirs in the well group control range and development and communication conditions thereof according to the karst background, seismic data, geological oil deposit data, drilling data, well logging curves, interwell reservoir portrayal and static data.
Preferably, the analysis of the dynamic effect relationship of the water injection well group is specifically as follows:
and determining the injection-production effect relationship according to the injection-production curve and the response condition of the water injection tracer, and analyzing the water injection failure or deterioration and quality change condition.
Preferably, the determination of the fracture-cavity combination model of the well group is as follows:
and judging whether the well group is a plane fracture-cave structure model of 'near well gap-far well cave' or 'near well gap-far well gap' according to the well completion condition, the static analysis result and the dynamic effect condition, if so, adopting the weathered crust karst reservoir water injection well flow channel adjusting method, and if not, not adopting the weathered crust karst reservoir water injection well flow channel adjusting method.
Preferably, the specific scheme for determining the flow channel adjustment scheme is as follows:
judging whether the development of the reservoir is shallow development, deep development or multiple sets of reservoirs developed simultaneously according to the seismic data and well drilling and completion and production data; judging the development of reservoirs among the well groups and the communication among the reservoirs and the communication positions and modes according to the cross-well profile; determining that residual oil exists at the periphery of a well, between wells, or simultaneously between wells at the periphery of the well; and giving the decision of the near well intervention or the far well intervention.
Preferably, the agent for flow channel adjustment is selected according to the following specific adjustment scheme:
and selecting flow channel adjusting particles which can deform and pass through the weathering crust stratum at the oil reservoir temperature and have displacement capacity according to the specific and working condition of the surface weathering crust karst oil reservoir.
Preferably, the injection slug determination and construction process comprises the following specific construction processes:
aiming at a structure of 'near well seam-far well hole', a proper flow regulating agent system is selected, and through low-displacement and low-pump pressure construction, the 'water channeling main seam' of a near well is fully blocked, and a secondary fracture system is released; aiming at a 'near-well hole-far-well seam' structure, a far-well water channeling seam needs to be plugged by crossing a near-well hole, a 'water channeling main seam' of a far well is plugged by adopting three processes of large discharge capacity, high-viscosity carrier fluid and non-settling water density particles, and meanwhile, in order to keep long-term effectiveness, small dosage and multiple rounds of secondary flow regulation are designed, and the water channeling seam is plugged in a stepped manner, so that an effective hole-sealing system is realized.
Preferably, the water injection scheme is determined as follows:
the structure of a near well seam-far well hole is adjusted in the well, and the original water injection scheme of a well group is adopted;
the structure of near well gap-far well hole is adjusted among wells, and the original water injection scheme of a well group is adopted;
the structure of 'near hole-far well gap' is that the residual oil of the well is rich and adjusted in the well, and the original water injection scheme of the well group is adopted to continue water injection or the well is produced by water injection.
Preferably, the structure of the near well gap-far well hole is adjusted among wells, a well group original water injection scheme is adopted, and a low-density soft elastomer flow passage adjustment scheme is specifically adopted to carry out dynamic flow adjustment.
Preferably, the well opening scheme comprises the following specific scheme:
and determining the well opening mode and the production system after the flow channel is adjusted and the water injection is resumed according to the flow adjusting scheme and the water injection scheme.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the invention provides a water injection well flow passage adjusting method for a weathering crust karst reservoir, which can adjust a flow passage scheme of a water injection well group according to the characteristics of a weathering crust reservoir on a surface layer of a carbonate rock of a tower river, and ensure the efficient development of the water injection of the karst reservoir of the tower river by using the scheme provided by the invention, the process success rate of the reservoir is improved to 100%.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Examples
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, and all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed in the embodiments, the description is simple because the structures, the products and the like correspond to the parts disclosed in the embodiments, and the relevant parts can be referred to the description of the method part.
Example 1:
the adjusting method for the water injection well flow channel of the weathering crust karst reservoir shown in figure 1 comprises the following steps:
s1: analyzing the static communication relation of the water injection well group according to the characteristics of the weathered crust karst oil reservoir;
s2: analyzing the dynamic effect relationship of the water injection well group according to the characteristics of the weathered crust karst reservoir;
s3: judging a fracture-cave combination model of the well group according to the analysis results of the S1 and the S2;
s4: determining a flow channel adjusting scheme according to the judged slot and hole combination model;
s5: selecting a flow channel adjusting agent according to an adjusting scheme;
s6: determining an injection slug and a construction process according to the selected flow channel adjusting agent;
s7: and determining a water injection scheme and a well opening scheme according to the determined injection slug and the construction process.
According to the scheme, further, the analysis of the static communication relation of the water injection well group comprises the following specific analysis: and determining all reservoirs in the well group control range and development and communication conditions thereof according to the karst background, seismic data, geological oil deposit data, well drilling data, well logging curves, interwell reservoir portrayal and other static data.
According to the scheme, further, the analysis of the dynamic effect relationship of the water injection well group comprises the following specific analysis: and determining the injection-production effect relationship according to the injection-production curve and the response condition of the water injection tracer, and analyzing the water injection failure or deterioration and quality change condition.
Specifically, the determination of the fracture-cavity combination model of the well group includes the following specific models: and (3) judging whether the well group is a plane fracture-cave structure model of 'near-well-seam-far-well' or 'near-well-seam-far-well' according to the well completion condition, the static analysis result and the dynamic effect condition by combining the well completion condition, the static analysis result and the dynamic effect condition, if so, adopting the weathered crust karst reservoir water injection well flow passage adjusting method, and if not, not adopting the weathered crust karst reservoir water injection well flow passage adjusting method.
Further, the flow channel adjustment scheme is determined as follows: judging whether the reservoir body develops into a shallow layer development, a deep layer development or a plurality of sets of reservoir bodies which develop simultaneously according to the seismic data, the drilling completion data and the production data; judging whether reservoir development still exists among well groups and whether the reservoirs are communicated or not and the communication positions and modes according to the cross-well profile; by combining the analysis, the residual oil is definitely existed at the periphery of the well, between wells or between wells at the periphery of the well; and giving the decision of the near well intervention or the far well intervention.
The specific adjustment scheme is as follows: selecting flow passage adjusting particles which can deform and pass through a weathering crust karst reservoir at the reservoir temperature and have displacement capacity according to the specific and working condition of the surface layer weathering crust karst reservoir, and simultaneously requiring that the particles are easy to store and convenient to transport under the ground condition; can be injected with the formation water of the tower river without blocking a pump, floating and gathering and agglomeration sedimentation.
According to the scheme, further, the injection slug and the construction process are determined, and the specific construction process is as follows: aiming at a structure of 'near well seam-far well hole', a proper flow regulating agent system is preferably selected, and through low-displacement and low-pump pressure construction, the 'water channeling main seam' full plugging of the near well is realized, and a secondary fracture system is released; aiming at a 'near-well hole-far-well seam' structure, a far-well water channeling seam needs to be plugged by crossing a near-well hole, three processes of high-discharge capacity, high-viscosity carrier fluid and non-settling equal-water-density particles are mainly adopted to plug a 'water channeling main seam' of a far well, and meanwhile, in order to keep long-term effectiveness, a small-dose and multi-round secondary flow regulation is designed, water channeling cracks are plugged in a stepped mode, and an effective seam hole system is started.
Wherein, the water injection scheme is determined as follows:
the structure of a near well seam-far well hole is adjusted in the well, and the original water injection scheme of a well group is adopted;
the structure of near well gap-far well hole is adjusted among wells, and the original water injection scheme of a well group is adopted;
the structure of a near well hole-far well gap is that the residual oil of the well is rich and is adjusted in the well, and the original water injection scheme of a well group is adopted to continue water injection or the water injection production of the well is adopted.
In summary, the well opening scheme comprises the following specific schemes: and determining the well opening mode and the production system after the flow channel is adjusted and the water injection is resumed according to the flow adjusting scheme and the water injection scheme.
Example 2:
according to the scheme of the embodiment 1, by taking the well group A as a weathering crust karst oil reservoir as an example, the static communication relation and the dynamic effect relation of the water injection well group are analyzed, and the well group A-A1 is determined to be a pressure hole type reservoir body, a crack zone and a small reservoir body; the A-A2 well group is communicated with an acid fracturing hole type reservoir body, a crack belt and a small reservoir body; the A-A3 well group is in fracture zone-small reservoir-karst cave type reservoir communication, the specific analysis result is that a 'near well seam-far well hole' structure is adjusted among wells, the original water injection scheme of the well group is adopted, the low-density soft elastomer is specifically selected for flow regulation, dynamic flow regulation is carried out, and the transverse residual oil utilization among wells is improved.
According to the embodiment, the water injection well flow channel adjusting method for the weathering crust karst reservoir can adjust the flow channel scheme of the water injection well group according to the characteristics of the weathering crust reservoir on the surface layer of the carbonate rock of the tower river, and ensures the efficient water injection development of the karst reservoir of the tower river.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (7)
1. A method for adjusting a channel of a water injection well of a weathering crust karst reservoir is characterized by comprising the following steps:
s1: analyzing the static communication relation of the water injection well group according to the characteristics of the weathered crust karst oil reservoir, and specifically analyzing as follows:
determining all reservoirs in the well group control range and development and communication conditions thereof according to karst background, seismic data, geological oil deposit data, well drilling data, well logging curves, interwell reservoir portrayal and static data;
s2: according to the characteristics of the weathered crust karst oil reservoir, analyzing the dynamic effect relationship of the water injection well group, and specifically analyzing as follows:
determining the injection-production effect relationship according to the injection-production curve and the response condition of the water injection tracer, and analyzing the water injection failure or variation condition;
s3: and judging a fracture-cave combination model of the well group according to the analysis results of the S1 and the S2, wherein the specific model is as follows:
judging whether a well group is a plane fracture-cave structure model of 'near well fracture-far well cave' or 'near well cave-far well fracture' according to the well completion condition, the static analysis result and the dynamic effect condition, if so, adopting the weathered crust karst reservoir water injection well flow channel adjusting method, and if not, not adopting the weathered crust karst reservoir water injection well flow channel adjusting method;
s4: determining a flow passage adjusting scheme according to the judged slot-hole combination model;
s5: selecting a flow channel adjusting agent according to an adjusting scheme;
s6: determining an injection slug and a construction process according to the selected flow channel adjusting agent;
s7: and determining a water injection scheme and a well opening scheme according to the determined injection slug and the construction process.
2. The method for adjusting the flow channel of the water injection well of the weathered crust karst reservoir according to claim 1, wherein the flow channel adjustment scheme is determined, and the specific scheme is as follows:
judging whether the reservoir body develops into a shallow layer development, a deep layer development or a plurality of sets of reservoir bodies which develop simultaneously according to the seismic data, the drilling completion data and the production data; determining the development of reservoirs among the well groups, the communication among the reservoirs, the communication position and the communication mode according to the cross-well profile; determining that the remaining oil exists at the same time around the well, between wells, or between wells around the well; and giving the decision of the near well intervention or the far well intervention.
3. The method for adjusting the flow channel of the water injection well of the weathering crust karst reservoir according to claim 2, wherein the specific adjustment scheme is as follows:
and selecting flow passage adjusting particles which can deform and pass through the weathering crust stratum and have displacement capacity at the oil reservoir temperature according to the specific and working condition of the surface layer weathering crust karst oil reservoir.
4. The adjusting method for the flow channel of the water injection well of the reservoir of the weathering crust karst according to claim 3, wherein the specific construction process for determining the injection slug and the construction process is as follows:
aiming at a structure of 'near well seam-far well hole', a proper flow regulating agent system is selected, and through low-displacement and low-pump pressure construction, the 'water channeling main seam' of a near well is completely blocked, and a secondary fracture system is released; aiming at a 'near-well hole-far-well seam' structure, a far-well water channeling seam needs to be plugged by crossing a near-well hole, a 'water channeling main seam' of a far well is plugged by adopting three processes of large discharge capacity, high-viscosity carrier fluid and non-settling water density particles, and meanwhile, in order to keep long-term effectiveness, small dosage and multiple rounds of secondary flow regulation are designed, and the water channeling seam is plugged in a stepped manner, so that an effective hole-sealing system is realized.
5. The method for adjusting the flow channel of the water injection well of the weathered crust karst reservoir according to claim 4, wherein the water injection scheme is determined, and the specific scheme is as follows:
the structure of a near well seam-far well hole is adjusted in the well, and the original water injection scheme of a well group is adopted;
the structure of a near well gap-far well hole is adjusted among wells, and the original water injection scheme of a well group is adopted;
the structure of a near well hole-far well gap is that the residual oil of the well is rich and is adjusted in the well, and the original water injection scheme of a well group is adopted to continue water injection or the water injection production of the well is adopted.
6. The method for adjusting the flow channel of the water injection well of the weathering crust karst reservoir according to claim 5, wherein the structure of the near well-seam-far well is adjusted among wells, and dynamic flow adjustment is carried out by adopting a well group original water injection scheme, particularly a low-density soft elastomer flow channel adjustment scheme.
7. The method for adjusting the flow channel of the water injection well of the reservoir for reservoir of weathering crust karst according to any of the claims 1 to 6, characterized in that the well-opening scheme is as follows:
and determining the well opening mode and the production system after the flow channel is adjusted and the water injection is resumed according to the flow channel adjusting scheme and the water injection scheme.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007006239A1 (en) * | 2005-07-14 | 2007-01-18 | Shengcun Wang | An extracting remaining oil method using horizontal wells to inject profile control agent for blocking water injection channel of oil reservoir |
| CN107474807A (en) * | 2017-08-25 | 2017-12-15 | 中国石油化工股份有限公司 | Fracture-pore reservoir runner regulator and preparation method thereof |
| CN108546550A (en) * | 2018-04-09 | 2018-09-18 | 中国石油化工股份有限公司 | Fracture hole type water drive flexibility tune stream particle and preparation method thereof |
| CN108570150A (en) * | 2018-04-09 | 2018-09-25 | 中国石油化工股份有限公司 | Elasticity adjusts stream particle and preparation method thereof |
| CN108625833A (en) * | 2018-04-26 | 2018-10-09 | 中国石油化工股份有限公司 | The method that fractured-cavernous carbonate reservoir runner adjusts improving ecology |
| US10442976B1 (en) * | 2018-10-31 | 2019-10-15 | China University Of Geosciences (Beijing) | Oil-soluble coated particle flow modifier for fractured-vuggy carbonate reservoir and preparation method and use thereof |
-
2020
- 2020-02-26 CN CN202010120269.9A patent/CN113309505B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007006239A1 (en) * | 2005-07-14 | 2007-01-18 | Shengcun Wang | An extracting remaining oil method using horizontal wells to inject profile control agent for blocking water injection channel of oil reservoir |
| CN107474807A (en) * | 2017-08-25 | 2017-12-15 | 中国石油化工股份有限公司 | Fracture-pore reservoir runner regulator and preparation method thereof |
| CN108546550A (en) * | 2018-04-09 | 2018-09-18 | 中国石油化工股份有限公司 | Fracture hole type water drive flexibility tune stream particle and preparation method thereof |
| CN108570150A (en) * | 2018-04-09 | 2018-09-25 | 中国石油化工股份有限公司 | Elasticity adjusts stream particle and preparation method thereof |
| CN108625833A (en) * | 2018-04-26 | 2018-10-09 | 中国石油化工股份有限公司 | The method that fractured-cavernous carbonate reservoir runner adjusts improving ecology |
| US10442976B1 (en) * | 2018-10-31 | 2019-10-15 | China University Of Geosciences (Beijing) | Oil-soluble coated particle flow modifier for fractured-vuggy carbonate reservoir and preparation method and use thereof |
Non-Patent Citations (2)
| Title |
|---|
| 塔河奥陶系缝洞型碳酸盐岩油藏开发对策探讨;李宗宇;《石油与天然气地质》;20071231;第27卷(第6期);第856-862页 * |
| 缝洞型碳酸盐岩油藏缝洞单元划分方法研究;陈志海;《石油与天然气地质》;20071231;第28卷(第6期);第847-855页 * |
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