Carbonate reservoir horizontal well development adjustment method and device

Abstract

The invention discloses a method and device for adjusting the development of horizontal wells in carbonate oil reservoirs. The method comprises: determining the water breakthrough mechanism of different types of horizontal wells in water injection development in carbonate oil reservoirs; dynamically monitoring the production data of different types of horizontal wells according to the water breakthrough mechanism of different types of horizontal wells, and clustering the horizontal wells according to the dynamic monitoring results to obtain clustering analysis results; according to the clustering analysis results, referring to the water breakthrough mechanism of different types of horizontal wells in water injection development, establishing a classification chart for reflecting the water content rising law of different types of horizontal wells; according to the classification chart, determining the reason for the rapid rise of water content in the horizontal well; and developing and adjusting the on-site injection and production operation of the horizontal well according to the reason for the rapid rise of water content in the horizontal well. The invention has a short cycle and can realize effective adjustment of the development of horizontal wells in carbonate oil reservoirs.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploration, and in particular to a method and a device for adjusting the development of a horizontal well in a carbonate reservoir. Background Art

[0002] Horizontal well technology was proposed in 1928, implemented in the 1940s, and widely used in the United States, Canada, France and other countries in the 1980s, forming a technical climax of horizontal well research and application. Now, horizontal well drilling technology has been increasingly improved, and various supporting technologies for horizontal wells have been developed based on this. However, there are still some problems in the development of some complex porous carbonate reservoirs.

[0003] In the existing technology, if the production time is long and the data is sufficient and complete, a geological model that can reflect the structural morphology, reservoir characteristics and fluid seepage law of the oil field can be established. On this basis, the whole oil field reservoir digital model is used for simulation prediction, and then the single well is studied, optimized and predicted. This method has a long operation cycle. It usually takes more than 1.5 years to establish a high-precision full reservoir dynamic model and historical matching. Moreover, it focuses on prediction and cannot achieve effective adjustment of horizontal well development in carbonate reservoirs. Summary of the invention

[0004] The embodiment of the present invention provides a method for adjusting the development of a horizontal well in a carbonate oil reservoir, which has a short cycle and can achieve effective adjustment of the development of a horizontal well in a carbonate oil reservoir. The method includes:

[0005] Determine the water breakthrough mechanism of different types of horizontal well waterflooding development in carbonate reservoirs;

[0006] According to the water breakthrough mechanism of different types of horizontal well water injection development, the production data of different types of horizontal wells are dynamically monitored, and cluster analysis is performed on the horizontal wells based on the dynamic monitoring results to obtain cluster analysis results;

[0007] According to the cluster analysis results, referring to the water breakthrough mechanism of different types of horizontal well water injection development, a classification chart is established to reflect the water content rise law of different types of horizontal wells;

[0008] According to the classification chart, determine the reason for the rapid increase of water content in the horizontal well;

[0009] Based on the reasons for the rapid increase in water content in the horizontal well, development adjustments are made to the on-site injection and production operations of the horizontal well.

[0010] The embodiment of the present invention further provides a carbonate reservoir horizontal well development adjustment device, which has a short cycle and can achieve effective adjustment of carbonate reservoir horizontal well development. The device includes:

[0011] The water breakthrough mechanism determination module is used to determine the water breakthrough mechanism of different types of horizontal well water injection development in carbonate reservoirs;

[0012] The cluster analysis module is used to dynamically monitor the production data of different types of horizontal wells according to the water breakthrough mechanism of water injection development of different types of horizontal wells, and to perform cluster analysis on the horizontal wells according to the dynamic monitoring results to obtain cluster analysis results;

[0013] A classification chart establishment module is used to establish a classification chart reflecting the water content rise law of different types of horizontal wells according to the cluster analysis results and with reference to the water breakthrough mechanism of different types of horizontal well water injection development;

[0014] A cause determination module, used to determine the cause of the rapid increase of water content in the horizontal well according to the classification chart;

[0015] The development adjustment module is used to adjust the on-site injection and production operations of the horizontal well according to the reasons for the rapid increase of water content in the horizontal well.

[0016] An embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above method when executing the computer program.

[0017] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above method.

[0018] In an embodiment of the present invention, the water breakthrough mechanism of different types of horizontal wells in water injection development in carbonate oil reservoirs is determined; according to the water breakthrough mechanism of different types of horizontal wells in water injection development, the production data of different types of horizontal wells are dynamically monitored, and the horizontal wells are clustered according to the dynamic monitoring results to obtain cluster analysis results; according to the cluster analysis results, with reference to the water breakthrough mechanism of different types of horizontal wells in water injection development, a classification chart reflecting the law of water content increase in different types of horizontal wells is established; according to the classification chart, the reason for the rapid increase of water content in the horizontal well is determined; according to the reason for the rapid increase of water content in the horizontal well, the on-site injection and production operation of the horizontal well can be developed and adjusted, and the cycle is short, so that effective adjustment of the development of horizontal wells in carbonate oil reservoirs can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 This is a flow chart of a method for adjusting the development of a horizontal well in a carbonate oil reservoir according to an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a carbonate oil reservoir horizontal well development adjustment device according to an embodiment of the present invention;

[0022] Figure 3 This is an example flow chart of a water injection development effect evaluation method in an embodiment of the present invention;

[0023] Figure 4 This is an example diagram of the theoretical flow curve of the oil field diversion phase in the embodiment of the present invention;

[0024] Figure 5 This is an example diagram of the classification chart of the water content rise law of horizontal wells in an embodiment of the present invention;

[0025] Figure 6 It is an example diagram of different water discharge mechanisms and water discharge mode diagrams in the embodiments of the present invention;

[0026] Figure 7 This is an example diagram of the dynamic characteristics of different water-rising well types and the water-drive oil mechanism in the embodiment of the present invention. DETAILED DESCRIPTION

[0027] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0028] Figure 1 A flowchart of a method for adjusting the development of a horizontal well in a carbonate reservoir provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the method includes:

[0029] Step 101: Determine the water breakthrough mechanism of different types of horizontal well water injection development in carbonate oil reservoirs.

[0030] In specific implementation, the water breakthrough mechanism of different types of horizontal well water injection development in carbonate reservoirs can be determined based on numerical simulation research combined with field tests and indoor experimental simulation results.

[0031] The water breakthrough mechanism includes: linear water breakthrough and overall flooding, multi-point water breakthrough and overall flooding, and point water breakthrough and local flooding. Each water breakthrough mechanism has the following signs:

[0032] Overall water flooding with linear water breakthrough: linear advancement, water ridge phenomenon is not obvious, water-free oil production period is long, and water content rises rapidly after water breakthrough; Overall water flooding with multiple point water breakthrough: multiple water ridges advance, water-cut oil production period is long, and water content rises slowly; Local water flooding with point water breakthrough: local water ridges advance rapidly to cause water flooding, no or short water oil production period, water content rises rapidly after water breakthrough, less oil is produced during the water cut period, and more residual oil is available. For details, please refer to Figure 6 .

[0033] In addition, the reasonable pressure maintenance level and bottom hole flow pressure are optimized by numerical simulation methods. The oil field production practice shows that the bottom hole flow pressure is slightly lower than the saturation pressure, which will not cause large-scale degassing of the oil well. According to the current actual bottom hole flow pressure control of oil wells, the reasonable reservoir pressure maintenance level can be controlled at around 80% of the original reservoir pressure, which can achieve a longer stable production period. Therefore, after the new oil field is put into development, water injection should be started when the reservoir pressure drops to 80% of the original reservoir pressure. When the reservoir pressure of the old oil field is lower than 80% of the original reservoir pressure, it is necessary to increase the injection volume and injection-production ratio at the new water injection time to restore the reservoir pressure.

[0034] Step 102: According to the water breakthrough mechanism of water injection development of different types of horizontal wells, the production data of different types of horizontal wells are dynamically monitored, and cluster analysis is performed on the horizontal wells according to the dynamic monitoring results to obtain cluster analysis results.

[0035] In an embodiment, the dynamic monitoring includes: formation pressure monitoring, PLT logging, and PVT high-pressure physical property sampling.

[0036] In the specific implementation, according to the water breakthrough mechanism of different types of horizontal well water injection development and the water injection timing in step 101, based on the daily development indicators of oil and water wells and dynamic monitoring data, the oil well production capacity, electric pump production rules, and formation energy changes are tracked, and the production curve change characteristics (including daily liquid production, daily oil production, daily gas production, daily water content, etc.) are timely analyzed, abnormal conditions (violent flooding, rapid decrease in production, rapid increase in water content, stoppage of spraying or pump failure, pump gas lock, pump jam, etc.) are diagnosed, and cluster analysis of oil wells is performed.

[0037] In addition, the inter-well seepage parameters and the development of high-permeability zones can be understood through the horizontal well production profile and the application of tracers; according to the total number of wells, 10% oil wells + 10% water wells are distributed as fixed-point pressure monitoring wells (pressure recovery and pressure drop), covering the center and edge in plane and high, medium and low parts in structural height; in addition, 5% mobile monitoring wells are deployed, which gradually extend outward with the outward rolling development, and the mobile well locations are mainly selected oil wells. Based on the monitoring results, through the multi-index analysis and scoring method of the well group, the future potential and problems of oil and water wells in the process of oil field development can be discovered and diagnosed in time, and solutions can be proposed in time, laying a good foundation for the rational and efficient development of oil fields.

[0038] Among them, the parameters that need to be dynamically monitored include:

[0039] a. Changes in oil well production, including daily oil production, daily liquid production, and gas production.

[0040] b. Production rules of electric pump wells, including dynamic liquid level, pump hanging depth, pump type and other parameters.

[0041] c. Pressure recovery test: Select no less than 3 wells (oil wells + water wells) in each area for fixed monitoring, and measure the pressure recovery or pressure observation once every 3 months during the monitoring period.

[0042] d. Static pressure measurement is required for newly commissioned wells before completion and acidization or when the production wells have stopped spraying or the drainage period has ended.

[0043] e. Monitor the flow pressure periodically at fixed-point monitoring wells, measure the flow pressure one month after the static pressure well is put into production, and measure the flow pressure before the electric pump is lowered.

[0044] f. Use temporarily idle wells as pressure monitoring wells to conduct continuous pressure monitoring.

[0045] g. Carry out pressure drop test on water injection wells. Through pressure monitoring and system well testing, analyze the control factors of high-yield wells in the reservoir, pressure distribution law, predict the flow pattern, boundary type, interference between wells and reservoir dynamic characteristics of oil wells, and provide pressure support for production dynamic analysis, injection plan determination, drilling and workover, etc.

[0046] h.PVT high-pressure physical property sampling: At least 1-3 wells are obtained each year to determine the physical property parameters of oil layer fluids at different stages. Through PLT logging, we can understand and analyze the production of oil reservoirs and solve the problems of oil and water well engineering. We can measure the production profile, water injection profile and apply tracer tracking technology to study the location and time of water breakthrough in oil wells, and take timely measures to reduce the water injection volume or implement effective plugging measures on oil wells to ensure that horizontal wells can operate at a higher level.

[0047] Step 103: Based on the cluster analysis results and referring to the water breakthrough mechanisms of different types of horizontal well water injection development, a classification chart is established to reflect the water content rise rules of different types of horizontal wells.

[0048] In the embodiment, the cluster analysis results refer to: the water injection development effect under different main controlling factors, including high permeability layer, high viscosity oil, fracture zone, and bottom water. For details, please refer to Figure 6 .

[0049] Step 104: Determine the reason for the rapid increase in water content in the horizontal well based on the classification chart.

[0050] In the embodiment, due to the unique problems of natural fractures and high permeability bands in many carbonate oil reservoirs, water often flows into the water layer or the injection well water flows in. This channel often causes early water breakthrough in the production well. Many operators are unwilling to actively control water before water breakthrough occurs, and they want to get returns faster by transforming the lower permeability layer. Phase flow prediction shows that under the same water content and flow rate conditions, there is a big difference in the final formation water saturation. Curve A shows that there is still a lot of crude oil left in the formation, and some areas are low and not flooded. Curve B shows that almost all the crude oil has been produced. Figure 4 .

[0051] The water-recovery curve derived from the phase permeability curve is combined with the water drive characteristic curve to form a horizontal well water rise classification chart: Category 1: core displacement water rise curve and water drive calibration recovery rate are above 60%; Category 2: water drive calibration recovery rate is between 50%-60%; Category 3: water drive calibration recovery rate is 40%-50%; Category 4: water drive calibration recovery rate is 30%-40%; Category 5: water drive calibration recovery rate is less than 30%, see Figure 5 .

[0052] Category 1-2 wells: Wells with slowly rising water content, longer water-free oil production period and water-free recovery rate; with water content of 0% to 25%, as the water content rises, the liquid volume decreases, and the production decreases rapidly; with water content of 25% to 40%, as the water content rises, the liquid volume increases, and the production rebounds; with water content of 40% to 80%, the speed of water content increase slows down, the liquid volume tends to be stable, and the production decreases relatively slowly.

[0053] Category 3-4 wells: Rapidly rising water content, water content 0% to 55%, as the water content rises, the liquid volume increases and the production rebounds; the water content stabilizes at 55%, the liquid volume tends to be stable, and the production tends to be stable; 55-80%, the water content rises faster, the liquid volume is stable, and the production decreases rapidly.

[0054] Category 5 wells: sudden increase in water content, low water-free recovery factor and water-free cumulative oil production; water injection breakthrough, rapid increase in water content, and finally stabilized at 55%, and production remained stable at a low level; 55-80%, liquid extraction, water content rises faster, and production recovers rapidly in the initial stage of liquid extraction, and then begins to decrease.

[0055] Among the 151 horizontal wells, 35 wells were of the slow-rising water-cut type, accounting for 23.2%, 36 wells were of the fast-flooding + slow-rising high-water-cut type, accounting for 23.8%, 28 wells were of the fast-flooding + fast-rising water-cut type, accounting for 18.5%, 48 wells were of the sudden-flooding + slow-rising high-water-cut type, accounting for 31.8%, and 5 wells were of the violent-flooding + fast-rising high-water-cut type, accounting for 3.3%. The classification of water-cut rising types is shown in Table 1.

[0056] Table 1

[0057]

[0058] In the embodiment, according to the classification chart, the reasons for the rapid increase of water content in the horizontal well can be determined by referring to Figure 7 .

[0059] Step 105: Perform development adjustments on the on-site injection and production operations of the horizontal well according to the reason for the rapid increase in water content in the horizontal well.

[0060] In the embodiment, the reasons for the rapid increase of water content in horizontal wells are:

[0061] The main influencing factors are the development of high permeability zones in the reservoir after horizontal well water injection, the development of caves, the early high injection-production intensity, and the plane heterogeneity.

[0062] Due to the existence of high permeability layers, the water content rises too fast after water injection. The oil wells in the main water injection blocks have obvious channeling characteristics and the water content rises quickly. Usually, the high permeability layer of sparry limestone is generally developed in the whole area or locally developed, with a core permeability of 230-1042mD (average 762mD) and a thickness of about 1.5m. The permeability of the pure sparry limestone high permeability layer is very different from that of other reservoirs, resulting in the injected water quickly entering the high permeability layer and breaking through to the oil wells along the high permeability layer. By setting up a high permeability layer, the water content of the well group and the single well can achieve a good historical fitting, while the water content historical fitting cannot be achieved without a permeable layer, indicating that the high permeability layer is the cause of water channeling in the well group. The reservoir thickness is relatively thin, and the reservoir (bioclastic limestone, green algae limestone) between the high permeability layer and the water injection well has a certain seepage capacity, so the barrier effect on water is limited. The injected water can quickly reach the high permeability layer of sparry limestone and break through to the water injection wells on both sides along this layer.

[0063] The cave development area forms a dominant channel, and the water content rises quickly. Low-intensity water injection should be adopted in this area. The five leaking wells in the AD2 well area are all located around the predicted caves. The water content of the adjacent wells with production dynamics is relatively high. After the 16th row of wells began to inject water, the 15th and 17th rows of wells saw water within 2 months; the wells around the fracture-cave development area of ​​the five wells in the AD4 well area have high water content. The injected water in the local area of ​​the AD1 well area quickly broke through, and the water content rose to 40%-60%.

[0064] In areas with strong pressure depletion before water injection, the water injection intensity is large, the injection-production ratio is between 1.5-2, the pressure recovery is obvious, but the water content rises rapidly. In the later stage, the injection-production ratio is reduced and the water content remains stable. In addition, PLT logging shows that the heterogeneity of physical properties on the plane leads to large differences in water injection volume in different well sections.

[0065] In the specific implementation, fine models of different types of well groups are established to study the critical point of reasonable injection-production ratio, determine the principle of water injection development optimization, and guide the real-time adjustment of on-site water injection work. The phase permeability curve and the water drive curve are combined to determine the critical point of rapid water rise. The well group with relatively good homogeneity enters the stage of rapid water rise when the geological reserve recovery degree is >17%, while the critical value of the well group with strong inhomogeneity may be lower, between 10% and 17%. Numerical modeling studies have shown that well groups with high permeability belts are more sensitive to changes in injection-production ratio. The larger the injection-production ratio, the shorter the water-free oil production period and the lower the recovery rate. The highest recovery rate can be obtained when the injection-production ratio is around 0.9. The well trajectory can appropriately extend the water-free oil production period and improve the recovery rate by avoiding high permeability belts.

[0066] The optimization principles for improving waterflooding development effects are as follows:

[0067] ① Well

[0068] The reasonable injection-production ratio of the late water injection well group is distributed in the range of 1.2-1.5. The formation deficit is compensated by the initial large water injection, the reservoir pressure is restored, and the single well production is guaranteed;

[0069] For the water-bearing well groups with a cumulative injection-production ratio of 0.4 and a production degree of more than 17%, and the corresponding oil wells with a fast water cut increase rate, the injection-production ratio is adjusted to about 1.0-1.2, the injection rate is reduced, the water cut is controlled to rise rapidly, and the horizontal and vertical balanced sweep is achieved;

[0070] For well groups with strong heterogeneity, when the cumulative injection-production ratio reaches about 0.3 and the recovery rate is 10-17%, low-speed water injection is required. The reasonable injection-production ratio is about 0.9 to prevent the formation of a dominant water flow channel too quickly.

[0071] ②Oil wells

[0072] After the oil wells in the well group are effective, the liquid production is gradually increased to ensure that the water injection effect is fully exerted;

[0073] When the water content rises too fast, dynamic production and injection allocation is implemented to reduce the injection rate, control the water content, and achieve stable oil and water control production;

[0074] Rapid flooding caused by high permeability zones is a cause for periodic water injection and water control tests in horizontal wells.

[0075] In the embodiment of the present invention, in order to facilitate the evaluation of the water injection development effects of different types of horizontal wells, according to the water breakthrough mechanism of water injection development of different types of horizontal wells, the production data of different types of horizontal wells are dynamically monitored, and cluster analysis is performed on the horizontal wells according to the dynamic monitoring results. After obtaining the cluster analysis results, the method further includes:

[0076] The water injection development effects of different types of horizontal wells were evaluated based on the cluster analysis results.

[0077] In specific implementation, a comprehensive evaluation method for waterflooding development effect can be established based on dynamic analysis, production decline analysis, water drive characteristic curve diagnosis, etc., and a multi-index waterflooding development effect evaluation system can be established to form a three-level evaluation of single well / well group → block → oil field to evaluate the development effect of waterflooding block / well group. For specific process example diagrams, please refer to Figure 3 .

[0078] The following is a specific example to illustrate this step:

[0079] The production characteristics and changing patterns of 151 water injection effective well groups, water injection breakthrough well groups and ineffective well groups were analyzed. Among them, 103 water injection well groups were effective, and the effective time was more than 4 months. The oil wells maintained stable production, the decline slowed down, the pressure was stable, and the effective well groups had a high degree of recovery. Among them, the recovery degrees of AD2-8-1H and AD2-8-3H well groups were 21.58% and 19.13% respectively; 44 well groups had water content exceeding 70% due to high permeability zones, faults, etc., which were the oil wells corresponding to AD-205H and AD2-8-4H well groups. Due to the increase in water content, the production decline accelerated, and the gas-oil ratio remained stable; 4 water injection well groups have not seen the water injection effect yet, all of which are newly converted injection wells with a water injection time of less than 4 months and some of the corresponding oil wells are newly put into production wells.

[0080] Effective oil wells: The production of oil wells is normal, the water content is stable, the overall water injection is stable, the oil well production has a recovery trend and has a stable section (1000bbl / d), the decline rate is lower than that of the non-injected well group, the geological reserve recovery rate of the well group is high, between 18-26%, and the pressure recovers.

[0081] Unproductive well groups: Due to late water injection, the production is lower than that of the effective well groups, only 200-800bbl / d, the production declines rapidly, and the gas-oil ratio is relatively high. The local pressure is low, and the monthly decline rate of some wells is 5%-9%. The geological reserve recovery rate of the well group is between 7-15%.

[0082] Based on the above, the present invention conducted a reasonable injection study on a complex medium-porosity and low-permeability large-scale carbonate oilfield within 5 years, optimized the single-well production and injection plan, optimized and adjusted the production system 163 times throughout the year, realized refined water injection adjustment, and currently 102 oil wells have been affected.

[0083] Waterflooding has achieved significant results, with a water-driven production of 3 million tons and an increase of 1.2 million tons. The reservoir pressure has recovered well, the production decline trend has slowed down, and the water-driven effect has increased. The reservoir pressure has recovered well, and the pressure maintenance level has been maintained from 65%Pi in 2014 to 73%Pi in 2018; the production of the AD1 well area, which was water-flooded earlier, has been steadily increasing, and the annual decline has slowed from 30% in 2013 to 20% in 2015, and the decline in the AD2 well area is controlled within 10%.

[0084] The method for adjusting the development of horizontal wells in carbonate oil reservoirs provided in an embodiment of the present invention determines the water breakthrough mechanism of water injection development of different types of horizontal wells in carbonate oil reservoirs; dynamically monitors the production data of different types of horizontal wells according to the water breakthrough mechanism of water injection development of different types of horizontal wells, and performs cluster analysis on the horizontal wells according to the dynamic monitoring results to obtain cluster analysis results; establishes a classification chart reflecting the law of water content increase in different types of horizontal wells according to the cluster analysis results and with reference to the water breakthrough mechanism of water injection development of different types of horizontal wells; determines the reason for the rapid increase of water content in the horizontal wells according to the classification chart; and adjusts the on-site injection and production operations of the horizontal wells according to the reason for the rapid increase of water content in the horizontal wells, with a short cycle, so as to achieve effective adjustment of the development of horizontal wells in carbonate oil reservoirs.

[0085] Based on the same inventive concept, a text file configuration device is also provided in the embodiments of the present invention, as described in the following embodiments. Since the principle of solving the problem by the text file configuration device is similar to that of the text file configuration method, the implementation of the text file configuration device can refer to the implementation of the text file configuration method, and the repeated parts will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0086] Figure 2 A structural diagram of a carbonate reservoir horizontal well development adjustment device provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the device comprises:

[0087] A water breakthrough mechanism determination module 201 is used to determine the water breakthrough mechanism of different types of horizontal well water injection development in carbonate reservoirs;

[0088] The cluster analysis module 202 is used to dynamically monitor the production data of different types of horizontal wells according to the water breakthrough mechanism of water injection development of different types of horizontal wells, and to perform cluster analysis on the horizontal wells according to the dynamic monitoring results to obtain cluster analysis results;

[0089] A classification chart establishment module 203 is used to establish a classification chart reflecting the water content rise law of different types of horizontal wells according to the cluster analysis results and with reference to the water breakthrough mechanism of different types of horizontal well water injection development;

[0090] The cause determination module 204 is used to determine the cause of the rapid increase of water content in the horizontal well according to the classification chart;

[0091] The development adjustment module 205 is used to adjust the on-site injection and production operations of the horizontal well according to the reasons for the rapid increase of water content in the horizontal well.

[0092] In an embodiment of the present invention, the device further includes:

[0093] The evaluation module is used to evaluate the water injection development effects of different types of horizontal wells based on the cluster analysis results.

[0094] In the embodiment of the present invention, the water breakthrough mechanism includes: linear water breakthrough and overall flooding, multi-point water breakthrough and overall flooding, and point water breakthrough and local flooding.

[0095] In the embodiment of the present invention, the dynamic monitoring includes: formation pressure monitoring, PLT logging, and PVT high-pressure physical property sampling.

[0096] In order to achieve the above purpose, according to another aspect of the present application, a computer device is provided. The computer device includes a memory, a processor, a communication interface and a communication bus, and a computer program that can be run on the processor is stored in the memory, and the processor implements the steps in the above embodiment method when executing the computer program.

[0097] The processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0098] The memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer executable programs and units, such as the corresponding program units in the above method embodiments of the present invention. The processor executes various functional applications of the processor and works data processing by running the non-transitory software programs, instructions and modules stored in the memory, that is, implementing the method in the above method embodiments.

[0099] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created by the processor, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0100] The one or more units are stored in the memory, and when executed by the processor, the method in the above embodiment is performed.

[0101] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above method.

[0102] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0103] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0104] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0105] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0106] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for adjusting the development of a horizontal well in a carbonate reservoir, characterized in that: include: Determine the water breakthrough mechanism of different types of horizontal well waterflooding development in carbonate reservoirs; According to the water breakthrough mechanism of different types of horizontal well water injection development, the production data of different types of horizontal wells are dynamically monitored, and cluster analysis is performed on the horizontal wells based on the dynamic monitoring results to obtain cluster analysis results; According to the cluster analysis results, referring to the water breakthrough mechanism of different types of horizontal well water injection development, a classification chart is established to reflect the water content rise law of different types of horizontal wells; According to the classification chart, determine the reason for the rapid increase of water content in the horizontal well; According to the reasons for the rapid increase of water content in the horizontal well, development and adjustment are made to the on-site injection and production operations of the horizontal well; Determine the water breakthrough mechanisms of different types of horizontal well waterflooding development in carbonate reservoirs, including: Based on numerical simulation research, combined with field tests and laboratory experimental simulation results, the water breakthrough mechanism of different types of horizontal wells in carbonate reservoirs is determined; According to the water breakthrough mechanism of different types of horizontal well water injection development, the production data of different types of horizontal wells are dynamically monitored, and cluster analysis is performed on the horizontal wells based on the dynamic monitoring results to obtain cluster analysis results, including: Based on the daily production development indicators of oil and water wells and dynamic monitoring data, track the oil well production capacity, electric pump production rules, and formation energy changes, timely analyze the characteristics of production curve changes, diagnose abnormal situations, and perform cluster analysis on oil wells; The dynamic monitoring includes: formation pressure monitoring, PLT logging, and PVT high-pressure physical property sampling; The cluster analysis results include: the effect of water injection development under different main controlling factors, including high permeability layers, high viscosity oil, fracture zones, and bottom water; According to the reasons for the rapid increase of water cut in the horizontal well, the on-site injection and production operations of the horizontal well are adjusted, including: Adjustment of the reasons for the rapid increase of water content in horizontal wells: Establish fine models of different types of well groups, study the critical point of reasonable injection-production ratio, determine the principles of water injection development optimization, and guide the real-time adjustment of on-site water injection work; Adjustment of optimization principles to improve waterflooding development effects: Establish a comprehensive evaluation method for waterflooding development effects based on dynamic analysis, production decline analysis, and water drive characteristic curve diagnosis; establish a multi-index waterflooding development effect evaluation system; form a three-level evaluation of single well / well group → block → oil field to evaluate the development effect of waterflood blocks / well groups.

2. The method according to claim 1, characterized in that According to the water breakthrough mechanism of water injection development of different types of horizontal wells, the production data of different types of horizontal wells are dynamically monitored, and cluster analysis is performed on the horizontal wells according to the dynamic monitoring results. After the cluster analysis results are obtained, the method further includes: The water injection development effects of different types of horizontal wells were evaluated based on the cluster analysis results.

3. The method according to claim 1, characterized in that The water breakthrough mechanisms include: linear water breakthrough and overall flooding, multi-point water breakthrough and overall flooding, and point water breakthrough and local flooding.

4. A carbonate reservoir horizontal well development adjustment device, characterized in that: include: The water breakthrough mechanism determination module is used to determine the water breakthrough mechanism of different types of horizontal well water injection development in carbonate reservoirs; The cluster analysis module is used to dynamically monitor the production data of different types of horizontal wells according to the water breakthrough mechanism of water injection development of different types of horizontal wells, and to perform cluster analysis on the horizontal wells according to the dynamic monitoring results to obtain cluster analysis results; A classification chart establishment module is used to establish a classification chart reflecting the water content rise law of different types of horizontal wells according to the cluster analysis results and with reference to the water breakthrough mechanism of different types of horizontal well water injection development; A cause determination module, used to determine the cause of the rapid increase of water content in the horizontal well according to the classification chart; A development adjustment module, used to adjust the on-site injection and production operation of the horizontal well according to the reason for the rapid increase of water content in the horizontal well; The water breakthrough mechanism determination module is specifically used to determine the water breakthrough mechanism of different types of horizontal well water injection development in carbonate reservoirs based on numerical simulation research, combined with field tests and indoor experimental simulation results; The cluster analysis module is specifically used to track the oil well production capacity, electric pump production rules, and formation energy changes based on the daily production development indicators of oil and water wells and dynamic monitoring data, timely analyze the characteristics of production curve changes, diagnose abnormal situations, and perform cluster analysis on oil wells; The dynamic monitoring includes: formation pressure monitoring, PLT logging, PVT high-pressure physical property sampling; cluster analysis results include: water injection development effects under different main controlling factors, including high permeability layers, high-viscosity oil, fracture zones, and bottom water; The development adjustment module is specifically used to adjust the reasons for the rapid increase of water content in horizontal wells: establish detailed models of different types of well groups, study the critical point of reasonable injection-production ratio, determine the principles of water injection development optimization, and guide the real-time adjustment of on-site water injection work; improve the adjustment of optimization principles for water injection development effects: establish a comprehensive evaluation method for water injection development effects based on dynamic analysis, production decline analysis, and water drive characteristic curve diagnosis, establish a multi-indicator water injection development effect evaluation system, form a three-level evaluation of single well / well group → block → oil field, and evaluate the development effect of water injection blocks / well groups.

5. The device according to claim 4, characterized in that The device also includes: The evaluation module is used to evaluate the water injection development effects of different types of horizontal wells based on the cluster analysis results.

6. The device according to claim 4, characterized in that The water breakthrough mechanisms include: linear water breakthrough and overall flooding, multi-point water breakthrough and overall flooding, and point water breakthrough and local flooding.

7. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 3 is implemented.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 3 is implemented.

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