CN113313610A - Method for adjusting flow channel of water injection well of dissolution-interrupted oil reservoir - Google Patents
Method for adjusting flow channel of water injection well of dissolution-interrupted oil reservoir Download PDFInfo
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q50/02—Agriculture; Fishing; Mining
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
Abstract
The invention discloses a method for adjusting a flow channel of a water injection well of an oil-gas reservoir, which relates to the field of oil-gas resource development, wherein a static communication relation of a water injection well group is analyzed according to an oil reservoir with a dissolved state, a dynamic effect relation of the water injection well group is analyzed according to the oil reservoir with the dissolved state, a fracture-cave combination model of the well group is judged according to the analysis of the static communication relation and the dynamic effect relation, whether the well group is a composite fracture-cave structure model of a longitudinal fracture-cave zone and a plane fracture-cave zone is judged according to the conditions of well completion, static analysis and dynamic effect, a flow channel adjusting scheme is determined according to the determined fracture-cave combination model, a flow channel adjusting agent is selected according to the determined flow channel adjusting scheme, an injection slug and a construction process are determined according to the selected flow channel adjusting agent, a water injection scheme is determined according to the determined injection slug and the construction process, and a well opening scheme is completed; according to the dissolved gas reservoir on the surface layer of the carbonate rock of the tower river, the flow channel scheme of the water injection well group is adjusted, and the efficient water injection development of the dissolved gas reservoir of the tower river is ensured.
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 passage of a Tahe carbonate rock dissolved solid reservoir and ensuring efficient water injection development of the Tahe dissolved solid reservoir.
Background
The document (Rong Yuan Shuai, carbonate fracture-cave type oil reservoir residual oil distribution mode and potential excavation strategy [ J ]. Petroleum institute, 2014,35(6): 1138-. 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 control factors of residual oil distribution and enhanced recovery ratio approach [ J ] after water flooding of a fracture-cavity type carbonate reservoir in a tower river oil field, petroleum exploration and development, 2019,46(4):746-754) the main control factors of residual oil distribution after water flooding of the fracture-cavity type carbonate reservoir can be classified into 4 categories including 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 mining of carbonate reservoir) reports a method for improving recovery efficiency in middle and later periods of secondary mining of carbonate reservoir, which determines the geological type of residual oil in middle and later periods of secondary mining 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 accumulated production condition, the secondary oil extraction measure and the failure condition of the oil well; and aiming at different types of residual oil, different oil-utilizing and water-weakening schemes are adopted, wherein the types of the residual oil are jointly limited by the geological type of the residual oil and the occurrence mode of the residual oil, different oil-utilizing and water-weakening materials are selected for the different oil-utilizing and water-weakening schemes, and different injection processes are selected for the different selected materials.
Patent CN108625833A (method for adjusting flow channels of fracture-cavity carbonate reservoir to improve water drive) reports a method for adjusting flow channels of fracture-cavity carbonate reservoir to improve water drive, which comprises 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 accumulated in the crack passage to be blocked or settled and accumulated in the crack, so that a water injection passage with the advantages of shrinkage joint or crack joint is realized; 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, use the residual oil of the secondary channel and is suitable for the fracture-cavity carbonate reservoir. 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 both of the above documents and patents do not address the research of the solution reservoir, it is necessary to research the method for adjusting the flow channels of the injection wells of such reservoirs in order to control the influence of the bottom water of the solution reservoir on the production of the oil wells and to improve the effect of water injection development of the well group, thereby improving the recovery efficiency of such reservoirs.
Disclosure of Invention
The embodiment of the invention provides a method for adjusting a flow channel of a water injection well of an oil reservoir with a dissolved gas. 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 a water injection well of a solution reservoir, including:
s1: analyzing the static communication relation of the water injection well group according to the solution reservoir;
s2: analyzing the dynamic effect relationship of the water injection well group according to the solution reservoir;
s3: judging a fracture-cavity combination model of the well group according to the analysis of the steps S1 and 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 the determined flow channel 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 according to the determined injection slug and the construction process, and completing the well opening scheme.
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 fracture-cavity combination model of the well group is judged according to the analysis of the steps S1 and S2, specifically: and (3) judging whether the well group is a composite fracture-cave structure model of a longitudinal fracture-cave zone-plane fracture zone or not by combining the well completion condition, the static analysis result and the dynamic effect condition, if so, adjusting by adopting the broken solution reservoir water injection well flow channel adjusting method, and if not, adopting the broken solution 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 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 the development of reservoirs among the well groups and the communication among the reservoirs and the communication position and mode according to the cross section of the wells; 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 determining the decision of the near wellbore intervention or the far wellbore intervention.
Preferably, determining a fracture-cavity combination model of the well group according to the analysis of the steps S1 and S2; the method specifically comprises the following steps of combining the well completion condition, the static analysis result and the dynamic effect condition, judging whether a well group is a composite fracture-cave structure model of a longitudinal fracture-cave zone and a plane fracture-cave zone, and judging a fracture-cave combination model of the well group, wherein the method specifically comprises the following steps: and (3) judging whether the well group is a composite fracture-cave structure model of a longitudinal fracture-cave zone-plane fracture zone or not by combining the well completion condition, the static analysis result and the dynamic effect condition, if so, adjusting by adopting the broken solution reservoir water injection well flow channel adjusting method, and if not, adjusting by adopting the broken solution reservoir water injection well flow channel adjusting method.
The method for adjusting the flow channel of the water injection well of the fractured-solution reservoir is suitable for a well group of a composite fracture-cavity structure model of a longitudinal fracture-cavity zone-a plane fracture-cavity zone.
Preferably, the specific adjustment scheme of the agent for adjusting the selected flow channel is as follows:
according to the specific and working condition of the fractured-solvent oil reservoir, three types of medicaments are simultaneously selected, the first type of medicaments can be used as materials for bridging large-scale cracks in the oil reservoir environment, the second type of medicaments can be used for effectively settling blocked solid particles on the basis of bridging, and the third type of medicaments can play a role in fixing and adhering a fluid system after bridging and blocking.
Preferably, the injection slug determination and construction process comprises the following specific construction processes:
the first type of bridging material is injected by adopting small displacement and low pump pressure;
the second type of blocking material is injected by adopting a small-displacement multi-section plug, and the pressure climbing phenomenon should occur in the injection process;
the third type of fixed adhesive is pushed in by a post-positioned slug at a specific flow rate according to the blocking position required and the consolidation time of the material.
Preferably, the water injection scheme is determined according to the flow regulation scheme, and the specific scheme is as follows:
the well is adjusted, the residual oil is rich, and a water injection scheme or an original water injection scheme of the well is adopted;
the well is adjusted, the residual oil is between wells, and the original water injection scheme is adopted;
and (4) adjusting the well far away, and pressurizing and injecting water into the residual oil in the affected well by adopting an adjusting well.
Preferably, the pressure of the pressurized water injection by the adjusting well is 10-24 MPa.
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 channel 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 method for adjusting a flow channel of a water injection well of a dissolved-fluid reservoir, which can adjust a flow channel scheme of a water injection well group according to the characteristics of a carbonate rock dissolved-fluid reservoir of a tower river and ensure the efficient water injection development of the dissolved-fluid reservoir of the tower river.
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.
Drawings
FIG. 1 is a schematic diagram of a preferred embodiment of a method for adjusting a flow channel of a water injection well of a weathered crust karst reservoir according to the present invention.
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, as well as 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 by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
The invention is further described with reference to the following figures and examples:
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 solution reservoir;
s2: analyzing the dynamic effect relationship of the water injection well group according to the solution reservoir;
s3: judging a fracture-cavity combination model of the well group according to the analysis of the steps S1 and 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 the determined flow channel 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 according to the determined injection slug and the construction process, and completing the well opening scheme.
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, drilling data, well logging curves, interwell reservoir portrayal and static data.
Specifically, further, the analysis of the dynamic effect relationship of the water injection well group includes 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.
Determining a fracture-cavity combination model of the well group according to the analysis of the steps S1 and S2, wherein the specific scheme is that whether the well group is a composite fracture-cavity structure model of a longitudinal fracture-cavity belt-a plane fracture belt is judged by combining the well completion condition, the static analysis result and the dynamic effect condition; if the adjustment is carried out by adopting the method for adjusting the flow channel of the water injection well of the dissolved-water reservoir, otherwise, the method for adjusting the flow channel of the water injection well of the dissolved-water reservoir is not adopted.
According to the above scheme, 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 the development of reservoirs among the well groups and the communication among the reservoirs and the communication position and mode according to the cross section of the wells; 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 adjusting scheme of the agent for adjusting the selected flow channel is as follows: according to the specific and working condition of the fractured-solvent oil reservoir, three types of medicaments are simultaneously selected, the first type of medicament can be a material which can be bridged in a large-scale crack under the oil reservoir environment, the second type of medicament can effectively settle blocked solid particles on the basis of bridging, and the third type of medicament can play a role in fixing and adhering a fluid system after bridging and blocking; the three medicaments can ensure certain stability in an oil reservoir environment, are easy to store and convenient to transport under the ground condition; the method can be accompanied with the injection of the formation water of the tower river or injected independently, and has no pump blockage, no solidification, no floating aggregation and no agglomeration and sedimentation.
Further, the concrete construction process of determining the injection slug and the construction process is as follows: the first type of bridging material is injected by adopting small displacement and low pump pressure; the second type of blocking material is injected by adopting a small-displacement multi-section plug, and the pressure climbing phenomenon should occur in the injection process; the third type of fixed adhesive is pushed in by a post-positioned slug at a specific flow rate according to the blocking position required and the consolidation time of the material.
According to the above scheme, further, the water injection scheme is determined according to the flow channel adjustment scheme, and the specific scheme is as follows: the well is adjusted, the residual oil is rich, and a water injection scheme or an original water injection scheme of the well is adopted; the well is adjusted, the residual oil is between wells, and the original water injection scheme is adopted; and (4) adjusting the well far away, and pressurizing and injecting water into the residual oil in the affected well by adopting an adjusting well.
The well opening scheme can also comprise 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 channel adjusting scheme and the water injection scheme.
Example 2:
according to the technical scheme in the embodiment 1, the A well group is taken as an example to be clamped by a great northeast fracture and a great nearly east fracture, and the A well is a typical fractured solution reservoir. Determining a plurality of sets of reservoir body modes of the well groups A-B in the direction of longitudinal fracture-interwell fracture zone-periwell fracture by analyzing the static communication relation and the dynamic effect relation of the water injection well groups; the A-C well group direction is a plurality of sets of reservoir body modes of longitudinal fracture-hole bodies, inter-well fracture-hole bodies and periwell fracture-hole bodies; A-D well group longitudinal fracture-interwell fracture zone-periwell fracture-cavity body multi-set reservoir body mode.
Analysis thinks, during A well water injection, the injected water mainly oozes into the river along the fracture, leads to the water injection invalid, consequently, considers adopting the deep dominant passageway of flow control agent shutoff, improves shallow runner water drive and uses the degree, uses the reservoir body of secondary crack passageway in top layer and intercommunication, concrete scheme 1: and (3) using the residual oil on the surface layer of the well C to regulate the flow of the well A, plugging the deep water channeling channel 2 of the well A-C group, injecting water into the well A, and submerging the residual oil on the surface layer between the well A and the well C.
Example 3:
according to the embodiment 2, the analysis shows that during the water injection of the well A, the injected water mainly seeps into the underground river along the fracture to cause ineffective water injection, so that the flow regulating agent is considered to be adopted to block the deep superior channel, the water driving degree of the shallow channel is improved, and the surface secondary fracture channel and the communicated reservoir body are used, and the specific scheme 2 is as follows: and D, utilizing the residual oil around the well B in the longitudinal direction, regulating the flow of the oil A, injecting water into the deep water channeling channel 1A from the well A to the deep water channeling channel C, and excavating and submerging the residual oil on the surface layer between the well A and the well B.
Example 4:
according to the embodiment 2, the analysis shows that during the water injection of the well A, the injected water mainly seeps into the underground river along the fracture to cause ineffective water injection, so that the flow regulating agent is considered to be adopted to block the deep superior channel, the water driving degree of the shallow channel is improved, and the surface secondary fracture channel and the communicated reservoir body are used, and the specific scheme 3 is as follows: and D, residual oil on the surface layer in the direction D is used for regulating the flow of the oil A, water is injected into the oil A to plug the deep water channeling passages 1 and 2, and the oil A is submerged between the wells A and D.
To summarize examples 2-4, the analysis suggests that the injected water mainly runs along the deep channels, the remaining oil is mainly concentrated in the upper part, and scheme 1 has the greatest potential, so scheme 1 is preferred, although schemes 2-3 are also possible.
In the embodiment, the construction adopts the scheme 1-2 that the density flow-regulating particles are 13.6t, the particles with the diameter of 2-3mm are 1.6t, the pressure of the large-size particles injected by a pump is rapidly increased, the pressure is increased from 10MPa to 24MPa, and the particles form strong plugging close to a well; the highest pressure of water injection is recovered to 13MPa, the adjacent well B, C has obvious effect, and the oil increment in the stage is about 4000 t.
According to the embodiment, the invention provides a method for adjusting a flow channel of a water injection well of a dissolved gas reservoir, which can adjust a flow channel scheme of a water injection well group according to the characteristics of a dissolved gas reservoir of a carbonate rock of a tower river, and ensure the efficient water injection development of the dissolved gas 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 only limited by the appended claims
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made according to the technical spirit of the present invention are within the scope of the present invention as claimed.
Claims (10)
1. A method for adjusting a flow channel of a water injection well of an oil reservoir with a dissolved gas cut-off structure is characterized by comprising the following steps:
s1: analyzing the static communication relation of the water injection well group according to the solution reservoir;
s2: analyzing the dynamic effect relationship of the water injection well group according to the solution reservoir;
s3: judging a fracture-cavity combination model of the well group according to the analysis of the steps S1 and 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 the determined flow channel 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 according to the determined injection slug and the construction process, and completing the well opening scheme.
2. The method for adjusting the flow channel of the water injection well of the fractured-fluid reservoir according to claim 1, wherein the static communication relation of the water injection well group is analyzed 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.
3. The method for adjusting the flow channel of the water injection well of the solution-breaking oil reservoir according to any one of claims 1 to 2, wherein the dynamic effect relationship of the water injection well group is analyzed 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.
4. The method for adjusting the flow channel of the water injection well of the solution-breaking oil reservoir according to claim 1, wherein the fracture-cavity combination model of the well group is judged according to the analysis of the steps S1 and S2, and specifically comprises the following steps: and (3) judging whether the well group is a composite fracture-cave structure model of a longitudinal fracture-cave zone-plane fracture zone or not by combining the well completion condition, the static analysis result and the dynamic effect condition, if so, adjusting by adopting the broken solution reservoir water injection well flow channel adjusting method, and if not, adopting the broken solution reservoir water injection well flow channel adjusting method.
5. The method for adjusting the flow channel of the water injection well of the solution reservoir according to claim 1, wherein 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 the development of reservoirs among the well groups and the communication among the reservoirs and the communication position and mode according to the cross section of the wells; 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 determining the decision of the near wellbore intervention or the far wellbore intervention.
6. The method for adjusting the flow channel of the water injection well of the fractured-fluid reservoir according to claim 5, wherein the specific adjustment scheme of the flow channel selection adjusting agent is as follows:
according to the specific and working condition of the fractured-solvent oil reservoir, three types of medicaments are simultaneously selected, the first type of medicaments can be used as materials for bridging large-scale cracks in the oil reservoir environment, the second type of medicaments can be used for effectively settling blocked solid particles on the basis of bridging, and the third type of medicaments can play a role in fixing and adhering a fluid system after bridging and blocking.
7. The method for adjusting the flow channel of the water injection well of the solution reservoir according to claim 6, wherein the specific construction process for determining the injection slug and the construction process is as follows:
in the first type, the bridging material is injected by adopting small displacement and low pump pressure;
in the second type, the blocking material is injected by adopting a small-displacement multi-section plug, and the pressure climbing phenomenon should occur in the injection process;
and in the third category, the fixed adhesive is pushed in by a rear slug at a specific flow rate according to the blocking position required and the consolidation time of the material.
8. The method for adjusting the flow channel of the water injection well of the solution-breaking oil reservoir according to claim 7, wherein the water injection scheme is determined according to the flow regulation scheme, and the specific scheme is as follows:
the well is adjusted, the residual oil is rich, and a water injection scheme or an original water injection scheme of the well is adopted;
the well is adjusted, the residual oil is between wells, and the original water injection scheme is adopted;
and (4) adjusting the well far away, and pressurizing and injecting water into the residual oil in the affected well by adopting an adjusting well.
9. The method for adjusting the flow channel of the water injection well of the fractured-fluid reservoir according to claim 8, wherein the pressure of the pressurized water injection by the adjusting well is 10-24 MPa.
10. The method for adjusting the flow channel of the water injection well of the solution reservoir according to claim 8, wherein 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 (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1654546A1 (en) * | 1987-01-04 | 1991-06-07 | Московский институт нефтехимической и газовой промышленности им.И.М.Губкина | Method of isolating fractured and karsted beds |
| CN106640027A (en) * | 2016-09-28 | 2017-05-10 | 中国石油化工股份有限公司 | Spatial structure well pattern construction method for underground river type carbonate karst reservoir of fractured-vuggy reservoir |
| CN107083939A (en) * | 2017-06-26 | 2017-08-22 | 中国石油化工股份有限公司 | Three-dimensional development method for the disconnected solution oil reservoir of carbonate rock |
| CN107191175A (en) * | 2017-07-11 | 2017-09-22 | 中国石油化工股份有限公司 | Flooding pattern construction method for the disconnected solution oil reservoir of carbonate rock |
| KR101818405B1 (en) * | 2017-09-11 | 2018-01-15 | 수풍산업 주식회사 | Assembly equipment for handrails |
| 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 |
| CN110007344A (en) * | 2019-04-08 | 2019-07-12 | 中国石油化工股份有限公司 | A kind of seismic identification and device of disconnected solution reservoir communication |
| 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 |
| CN110644957A (en) * | 2019-10-10 | 2020-01-03 | 王学忠 | Novel method for improving development effect of super heavy oil edge water reservoir |
-
2020
- 2020-02-26 CN CN202010120762.0A patent/CN113313610B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1654546A1 (en) * | 1987-01-04 | 1991-06-07 | Московский институт нефтехимической и газовой промышленности им.И.М.Губкина | Method of isolating fractured and karsted beds |
| CN106640027A (en) * | 2016-09-28 | 2017-05-10 | 中国石油化工股份有限公司 | Spatial structure well pattern construction method for underground river type carbonate karst reservoir of fractured-vuggy reservoir |
| CN107083939A (en) * | 2017-06-26 | 2017-08-22 | 中国石油化工股份有限公司 | Three-dimensional development method for the disconnected solution oil reservoir of carbonate rock |
| CN107191175A (en) * | 2017-07-11 | 2017-09-22 | 中国石油化工股份有限公司 | Flooding pattern construction method for the disconnected solution oil reservoir of carbonate rock |
| KR101818405B1 (en) * | 2017-09-11 | 2018-01-15 | 수풍산업 주식회사 | Assembly equipment for handrails |
| 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 |
| CN110007344A (en) * | 2019-04-08 | 2019-07-12 | 中国石油化工股份有限公司 | A kind of seismic identification and device of disconnected solution reservoir communication |
| CN110644957A (en) * | 2019-10-10 | 2020-01-03 | 王学忠 | Novel method for improving development effect of super heavy oil edge water reservoir |
Non-Patent Citations (2)
| Title |
|---|
| JI, YJ ET AL.: "Analysis on inflowing of the injecting Water in faulted formation", 《ADVANCES IN MECHANICAL ENGINEERING》, vol. 7, no. 6, pages 1 - 2 * |
| 牟建业等: "缝洞型储层酸压暂堵剂封堵性能研究", 《缝洞型储层酸压暂堵剂封堵性能研究》, vol. 11, no. 3, pages 258 - 262 * |
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