CN111738584B - Method for analyzing oil well productivity applied to mining site - Google Patents
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- 239000003129 oil well Substances 0.000 title claims abstract description 85
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- 230000008859 change Effects 0.000 claims abstract description 74
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- 238000007405 data analysis Methods 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 189
- 239000003921 oil Substances 0.000 claims description 56
- 238000012423 maintenance Methods 0.000 claims description 54
- 230000009467 reduction Effects 0.000 claims description 47
- 238000007726 management method Methods 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 230000000694 effects Effects 0.000 claims description 38
- 238000002347 injection Methods 0.000 claims description 38
- 239000007924 injection Substances 0.000 claims description 38
- 238000011084 recovery Methods 0.000 claims description 17
- 230000008901 benefit Effects 0.000 claims description 15
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Abstract
The invention provides a method for analyzing the capacity of a mining field application oil well, which comprises the following steps: step 1, establishing an oil well productivity analysis model and making a drawing board; step 2, determining a selected area and analysis time for capacity analysis; step 3, calculating the oil well productivity, and carrying out data analysis according to the plate model; step 4, finding out the variable in the capacity change, putting the variable into an analysis plate, and calculating the quantity of each capacity change; and 5, carrying out capacity analysis, finding out main factors influencing capacity change, and making corresponding adjustment countermeasures. The mining field application oil well productivity analysis method can analyze the single well variation productivity of the development layer or the development unit oil well, analyze the main factors restricting the productivity variation at the stage, find the main adjustment direction for improving the productivity of the development layer or the development unit, and form a single well productivity classification analysis technical route applicable to different oil reservoir types and different development units.
Description
Technical Field
The invention relates to the technical field of oilfield development, in particular to a method for analyzing the productivity of a mining field application oil well.
Background
The oil well productivity refers to the productivity or oil production capacity of an oil well when the oil well works at full time rate (24 hours of production of the whole day well), and the unit is t/d, and is used for describing and representing the injection and production conditions and development effects of the oil field.
At present, the analysis of the oil well productivity in the mine mainly focuses on macroscopic factors such as oil reservoir recognition degree, crude oil physical properties, oil field exploitation strategies and the like, is suitable for the construction and planning of the productivity, and has weak adaptability to the dynamic management work of a guiding site. One of the core tasks of oil field development is to keep the productivity of an oil well stable, discover the root cause of the productivity change of the oil well in time in the production of a mine, and make corresponding adjustment countermeasures, which is one of the important works for keeping the stable development of the oil field, so that a productivity analysis method capable of closely reflecting the actual conditions of the production of the mine is urgently needed to guide the dynamic management works of complete injection and production, adjustment of injection and production, optimization of measures, optimization of working conditions, management of a problem well and the like in the production of the mine.
Therefore, the invention provides a novel method for analyzing the capacity of the oil well applied to the mining field, and solves the technical problems.
Disclosure of Invention
The invention aims to provide a mining field application oil well productivity analysis method suitable for well groups, development layers, oil reservoir types and development units, which can finely analyze the productivity change reasons of each single well and clearly find one or more main factors influencing the productivity change.
The object of the invention can be achieved by the following technical measures that a method for analyzing the capacity of a mining field application oil well comprises the following steps: step 1, establishing an oil well productivity analysis model and making a drawing board; step 2, determining a selected area and analysis time for capacity analysis; step 3, calculating the oil well productivity, and carrying out data analysis according to the plate model; step 4, finding out the variable in the capacity change, putting the variable into an analysis plate, and calculating the quantity of each capacity change; and 5, carrying out capacity analysis, finding out main factors influencing capacity change, and making corresponding adjustment countermeasures.
The aim of the invention can be achieved by the following technical measures:
in step 1, an oil well productivity analysis model is established, wherein the model comprises three major categories 57 small items, and three major categories of new wells, measures and old wells are determined according to the changes of production horizons and production time, and codes are A, B, C respectively.
In step 1, the new well production capacity (A) analyzes the production capacity change of the new well production in the current year, wherein the production capacity rise (A1) is divided into 2 items of new well production (A1 (1)), new well production (A1 (2)); the productivity reduction (A2) is divided into 2 items of new well production stopping (A2 (1)) and new well descending (A2 (2)), and the change condition of new well succession capacity and new well production capacity in the current year is analyzed to reflect the production increase, production stabilizing capacity and descending rule of new throwing wells.
In step 1, the measure well productivity (B) analyzes the change of the annual measure well productivity, wherein the productivity rise (B1) is classified into 3 items of measure well opening (B1 (1)), measure yield increase (B1 (2)), measure change (B1 (3)); the productivity reduction (B2) is divided into 3 items of measure stopping production (B2 (1)), measure decreasing (B2 (2)), measure changing (B2 (3)), analyzing the taking over capacity of the measure well in the current year, the decreasing condition of the measure well, and changing the production capacity of the measure well into and out of the development layer across, and reflecting the increase production, the stable production capacity and the decreasing rule of the measure well in the current year.
In step 1, the old well productivity (C) analyzes the productivity change of the unchanged well of the annual production horizon, and is divided into productivity increase (C1), productivity decrease (C2) and regular change (C3).
In the step 1, the old well (C1) with increased productivity is divided into four subclasses of well opening (C1-1), injection and production adjustment effect (C1-2), working condition well condition management (C1-3) and maintenance well (C1-4), and the production capacity increasing rule brought by oil reservoir, shaft, water well management and other works is reflected.
In the step 1, old well opening (C1-1) is subdivided into maintenance well opening (C1-1(1)), direct well opening (C1-1(2)) 2 items, capacity increase caused by well opening number increase is reflected, and old well utilization effect and benefit are evaluated.
In the step 1, the injection and production adjustment effect (C1-2) is subdivided into 6 items of increasing the water injection direction (C1-2(1), injection and production allocation (C1-2(2), water shutoff and profile control (C1-2(3), water well re-layering (C1-2(4)), problem water well treatment (C1-2(5) and underinjection treatment (C1-2(6)), and the capacity increase brought by various injection and production adjustment works is reflected and used for evaluating the effect and benefit of the injection and production adjustment works.
In step 1, the working condition well condition management (C1-3) is subdivided into 3 items of well condition management (C1-3(1)), working condition management (C1-3(2)), parameter optimization (C1-3(3)), and capacity recovery brought by casing management, downhole tool repair and parameter optimization is reflected to evaluate the effect and benefit of well shaft management.
In step 1, the maintenance well (C1-4) is subdivided into maintenance recovery (C1-4(1)), maintenance stimulation (C1-4(2)) 2 items, wherein the productivity rises to maintenance recovery within 30 days of maintenance open; after the maintenance well is opened for 30 days, the productivity is increased to be maintained and increased, and the maintenance well recovery effect is evaluated.
In the step 1, the old well (C2) with lowered productivity is divided into nine categories of well closing (C2-1), imperfect well pattern (C2-2), unbalanced injection and production relation (C2-3), well failure (C2-4), reservoir factors (C2-5), well condition working condition influence (C2-6), maintenance influence (C2-7), daily management (C2-8) and heavy oil recovery (C2-9).
In step 1, the well shut-in energy (C2-1) of the old well analyzes the productivity of the well shut-in influence, including the well transfer (C2-1(1)), the engineering factor shut-in (C2-1(2)), the sleeve damage shut-in (C2-1(3)), the low benefit shut-in (C2-1(4)), the adjacent well drilling (operation) shut-in (C2-1(5)), and the other factor shut-in (C2-1(6), and analyzes the well shut-in due to the factors of well pattern adjustment, downhole tubular column, benefit deterioration, and production operation, and reflects the productivity reduction caused by the shut-in.
In the step 1, the productivity is reduced (C2-2) caused by the imperfect well pattern, the productivity influenced by the poor well pattern perfection degree is analyzed, wherein the productivity comprises 5 items of only non-perfect potential (C2-2(1), only non-perfect potential (C2-2(2), unidirectional receiving effect non-perfect potential (C2-2(3), unidirectional receiving effect effective perfect potential (C2-2(4) and side bottom water propulsion (C2-2(5), the productivity change of an imperfect well pattern is analyzed, and the influence of the current well pattern adaptability on the productivity is reflected.
In the step 1, the productivity reduction (C2-3) caused by unbalanced injection and production relation is analyzed, the productivity variation caused by the variation of injection and production relation is analyzed, the productivity variation comprises 4 items of long-term fixation (C2-3(1) of a streamline, rebound (C2-3(2) after injection and production adjustment effect, change (C2-3(3) of a streamline and interlayer interference (C2-3(4)), the oil well productivity influenced by unbalanced three fields is analyzed, and the reduction of the production capacity of the oil well with unbalanced injection and production in stages is reflected.
In the step 1, the capacity drop (C2-4) caused by the failure of the water well is analyzed, the capacity drop caused by untimely management of the water well is included, the method comprises 4 steps of water well sleeve damage (C2-4(1), tool failure (C2-4(2), water well underinjection (C2-4(3) and water well overinjection and yield reduction (C2-4(4)), the oil well capacity influenced by abnormal working conditions and water injection quality change of the water well is analyzed, and the influence of the water well management in the stage on the production capacity of the oil well is reflected.
In step 1, the productivity is reduced (C2-5) caused by reservoir factors, the productivity influenced by reservoir oil production index change is analyzed, the productivity comprises thickened oil (C2-5(1)), sand production (C2-5(2)) class 2, and the change of the productivity of the oil well due to thickened oil and sand production is analyzed, so that a basis is provided for the next treatment.
In step 1, the capacity reduction (C2-6) caused by the influence of the well condition working condition comprises 4 items of pump pipe leakage and yield reduction (C2-6(1), seal failure and yield reduction (C2-6(2), sleeve failure and yield reduction (C2-6(3)) and parameter adjustment (C2-6(4), and the changes of pipe column leakage, packer failure, casing variation and parameter adjustment oil well capacity are analyzed to reflect the capacity reduction caused by the working condition and well condition change.
In step 1, the productivity is reduced (C2-7) caused by maintenance influence, comprising 2 items of maintenance to be recovered (C2-7(1)), and maintenance yield reduction (C2-7(2), wherein the productivity is reduced to be recovered within 30 days of maintenance open; the productivity is reduced after the maintenance is started for 30 days, and the productivity reduction caused by the maintenance operation quality is reflected.
In step 1, the daily management capacity is reduced (C2-8), and the production capacity reduction caused by the well flushing effect (C2-8(1), the water mixing effect (C2-8(2) and the equipment maintenance (C2-8(3) in the daily management process is analyzed.
In step 1, the productivity of the heavy oil produced by three recovery is reduced (C2-9), and the productivity reduction caused by the water return in the three recovery period (C2-9(1) and the decrease in the heavy oil thermal recovery period (C2-9(2) is analyzed.
In the step 1, the well productivity (C3) is changed regularly, and the other oil well productivity with sufficient production time rate and regular change of productivity, including fluctuation rising (C3-1(1)), and regular decreasing (C3-1(2) 2 items are analyzed to reflect the change condition of the dynamic situation of the oil reservoir.
In step 2, determining the selection area and analysis time for capacity analysis, selecting different development layers or production wells of different development units as analysis objects, and comparing the analysis time with the time, or comparing the analysis time with the time.
In step 3, the calculation of the oil well productivity is carried out, wherein the calculation comprises the steps of arranging the oil well production horizon, working system, production time and working fluid level, calculating daily fluid production capacity, daily oil production capacity and comprehensive water content,
the calculation formula is as follows: daily liquid (oil) capacity = cumulative liquid amount (oil quantity)/actual days of production
Wherein the accumulated liquid (oil) is the sum of the actual liquid production amount (oil quantity) in the stage, the unit is t; the actual production days are the actual production days in the stage, namely the actual production hours per 24 units, d.
According to the mining field application oil well productivity analysis method, the influence of a large class is determined firstly according to the productivity change condition, and then the influence is analyzed layer by layer, so that the root cause of the influence on the productivity change is found, and the analysis requirements of different technicians are met. The oil reservoir engineer can accurately control the dynamic situation of the oil reservoir, timely develop oil reservoir management work such as well pattern perfection, water well treatment, streamline adjustment and the like, formulate the workload of measures for increasing and stabilizing yield and ensure the dynamic stability of the oil reservoir; the process engineer can accurately analyze the influence of well conditions and well bore changes on productivity, and timely perform work such as working condition optimization, well condition management, on-site well bore management and the like, so that the high efficiency and long-acting of a production well bore are ensured; the production operation department timely carries out coordination work of operation power according to the capacity condition, optimizes the repair sequence of the operation well and improves the production time rate of the production well; the operation well management department analyzes the operation quality in time to ensure the recovery rate of the operation well; the management department can control the overall operation dynamic, accurately optimize and adjust the investment direction of development funds, and ensure the long-acting and high-efficiency of development management.
Drawings
FIG. 1 is a flow chart of one embodiment of a method for analyzing the capacity of a mine application well according to the present invention.
Detailed Description
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
The mining field application oil well productivity analysis method provided by the invention comprises the following steps of:
step 1, establishing an oil well productivity analysis model which comprises three major 57 small items;
and establishing an oil well productivity analysis model which comprises three major 57 small items.
According to the changes of the production horizon and the production time, three major categories of new wells, measures and old wells are determined, and the codes are A, B, C respectively.
The new well production capacity (A) mainly analyzes the production capacity change of the new well production in the current year, wherein the production capacity rising (A1) is divided into 2 items of new well production (A1 (1)), new well production (A1 (2)); the productivity reduction (A2) is divided into 2 items of new well production stopping (A2 (1)) and new well descending (A2 (2)), and the change condition of new well succession capacity and new well production capacity in the current year is analyzed to reflect the production increase, production stabilizing capacity and descending rule of new throwing wells.
The capacity (B) of the measure well mainly analyzes the capacity change of the measure well in the year, wherein the capacity rise (B1) is divided into 3 items of measure well opening (B1 (1)), measure yield increase (B1 (2)) and measure improvement (B1 (3)); the productivity reduction (B2) is divided into 3 items of measure stopping production (B2 (1)), measure decreasing (B2 (2)), measure changing (B2 (3)), analyzing the taking over capacity of the measure well in the current year, the decreasing condition of the measure well, the changing in and out of the production capacity of the well across a development layer (development unit), and reflecting the increase production, the production stabilizing capacity and the decreasing rule of the measure well in the current year.
The old well productivity (C) mainly analyzes the productivity change of the unchanged well of the annual production horizon, and is divided into productivity increase (C1), productivity decrease (C2) and regular change (C3).
The capacity rising old well (C1) is divided into four categories of well opening (C1-1), injection and production adjustment and effect taking (C1-2), working condition well condition management (C1-3) and maintenance well (C1-4), and the capacity rising rule brought by oil deposit, shaft, water well management and other works is reflected.
Old well opening (C1-1) is subdivided into maintenance well opening (C1-1(1)), direct well opening (C1-1(2)) 2 items, capacity increase caused by well opening number increase is reflected, and old well utilization effect and benefit are evaluated.
The injection and production adjustment effect (C1-2) is subdivided into 6 items of increasing the water injection direction (C1-2(1)), injection and production allocation (C1-2(2)), water shutoff and profile control (C1-2(3), water well re-layering (C1-2(4)), problem water well treatment (C1-2(5)), underinjection treatment (C1-2(6)), and capacity increase brought by various operations of injection and production adjustment is reflected, so that the injection and production adjustment effect and the production adjustment effect are evaluated.
The working condition well condition management (C1-3) is subdivided into 3 items of well condition management (C1-3(1)), working condition management (C1-3(2)), parameter optimization (C1-3(3), and capacity recovery brought by casing management, downhole tool repair and parameter optimization is reflected to evaluate the effect and benefit of well shaft management.
Maintenance well (C1-4) is subdivided into maintenance recovery (C1-4(1)), maintenance stimulation (C1-4(2)), 2, wherein the productivity rises to maintenance recovery within 30 days of maintenance open; after the maintenance well is opened for 30 days, the productivity is increased to be maintained and increased, and the maintenance well recovery effect is evaluated.
The old well (C2) with lowered productivity is divided into nine categories of well closing (C2-1), well pattern imperfection (C2-2), unbalanced injection and production relation (C2-3), well failure (C2-4), reservoir factors (C2-5), well condition working condition influence (C2-6), maintenance influence (C2-7), daily management (C2-8) and heavy oil production (C2-9).
The old well shut-in energy (C2-1) is mainly used for analyzing the productivity of the well shut-in influence of the oil well, and comprises the oil well shut-in caused by well pattern adjustment, underground pipe columns, poor benefits, production operation and other factors, namely, the well shut-in caused by well shut-in is analyzed, namely, the production capacity is 6, namely, the well is stopped due to the fact that the well is transferred, the engineering factors are stopped (C2-1(2), the casing is damaged, the production is stopped (C2-1(3), the low-benefit production is stopped (C2-1(4), the well is shut-in caused by the well drilling (operation), and the productivity reduction caused by well shut-in is reflected.
The productivity reduction (C2-2) caused by the well pattern imperfection mainly analyzes the productivity influenced by the poor well pattern perfection degree, including the production without injection (C2-2(1), the production without injection (C2-2(2)), the unidirectional receiving effect (C2-2(3)), the unidirectional receiving effect (C2-2(4)), the side bottom water propulsion (C2-2(5)), and the productivity change of the well pattern imperfection oil well is mainly analyzed to reflect the influence of the current well pattern adaptability on the productivity.
The productivity reduction (C2-3) caused by unbalanced injection and production relation is mainly analyzed, the productivity change caused by the injection and production relation change is mainly analyzed, the productivity change comprises 4 items of long-term fixation (C2-3(1) of a streamline, rebound (C2-3(2) after injection and production adjustment becomes effective, change (C2-3(3) of the streamline and interlayer interference (C2-3(4)), the oil well productivity influenced by unbalanced three fields is mainly analyzed, and the reduction of the production capacity of the oil well with unbalanced injection and production in stages is reflected.
The productivity reduction (C2-4) caused by well failure is mainly analyzed, the productivity reduction caused by untimely well management is mainly analyzed, the productivity reduction comprises 4 items of well casing damage (C2-4(1), tool failure (C2-4(2), well underinjection (C2-4(3) and well overejection and yield reduction (C2-4(4)), the oil well productivity influenced by abnormal well working condition and water injection quality change is analyzed, and the influence of the stage well management on the oil well production capacity is reflected.
The productivity reduction (C2-5) caused by reservoir factors mainly analyzes the productivity influenced by reservoir oil production index change, including thickened oil (C2-5(1)), sand production (C2-5(2)) class 2, analyzes the change of the productivity of the oil well due to thickened oil and sand production, and provides a basis for the next treatment.
The productivity reduction (C2-6) caused by the influence of the working condition of the well comprises 4 items of pump pipe leakage and yield reduction (C2-6(1), seal failure and yield reduction (C2-6(2), sleeve failure and yield reduction (C2-6(3)) and parameter adjustment (C2-6(4), and the method mainly analyzes the changes of pipe column leakage, packer failure, casing deterioration and parameter adjustment well productivity and reflects the productivity reduction caused by the working condition and the well condition change.
Capacity reduction (C2-7) due to maintenance impact, including maintenance to be recovered (C2-7(1)), maintenance to reduce production (C2-7(2)), 2, wherein the capacity reduction is maintenance to be recovered within 30 days of maintenance open; the productivity is reduced after the maintenance is started for 30 days, and the productivity reduction caused by the maintenance operation quality is reflected.
The productivity of daily management is reduced (C2-8), and the productivity reduction caused by well flushing effect (C2-8(1), water mixing effect (C2-8(2) and equipment maintenance (C2-8(3) in the daily management process is mainly analyzed.
The productivity of the heavy oil produced by three production is reduced (C2-9), and the productivity reduction caused by the water return in the three production period (C2-9(1) and the decrease of the heavy oil thermal production period (C2-9(2) is mainly analyzed.
The well productivity (C3) is changed regularly, and the well productivity with sufficient production time rate and regular change of productivity is mainly analyzed, wherein the well productivity comprises 2 items of fluctuation rising (C3-1(1)), regular decreasing (C3-1(2) and reflects the change condition of the dynamic situation of an oil reservoir.
And (3) manufacturing an oil well productivity analysis chart according to the method, and establishing a subentry calculation template, wherein the subentry calculation template is shown in the following table:
table 1 oil well productivity analysis template table
Step 2, determining the selection area and analysis time for capacity analysis, wherein production wells with different development layers or different development units can be selected as analysis objects, and the analysis time can be compared with time points or time periods;
step 3, carrying out oil well productivity calculation, wherein the oil well productivity calculation comprises the steps of arranging an oil well production horizon, a working system, production time and a working fluid level, calculating daily fluid production capacity, daily oil production capacity and comprehensive water content;
the calculation formula is as follows: daily liquid (oil) capacity = cumulative liquid amount (oil quantity)/actual days of production
Wherein the accumulated liquid (oil) is the sum of the actual liquid production amount (oil quantity) in the stage, the unit is t; the actual production days are the actual production days in the stage, namely the actual production hours per 24 units, d.
Step 4, finding out the variable in the capacity change, putting the variable into an analysis plate, and calculating the quantity of each capacity change;
and 5, carrying out productivity analysis, finding out main factors influencing the productivity change, and making corresponding adjustment countermeasures in time to ensure timeliness and accuracy of analysis in the production of the mining field.
In one embodiment of the present invention, as shown in FIG. 1, FIG. 1 is a flow chart of the well productivity analysis template and method of the present invention.
And step 101, establishing an oil well productivity analysis template.
Step 102, selecting 127 production wells of a development unit, and analyzing the change reasons of the oil well productivity of 8 months and 7 months.
Step 103, obtaining production time rate, production horizon, working system and working fluid level data of each oil well for 7 months and 8 months, calculating daily hydraulic power and daily oil production capacity of the oil well, and comprehensively containing water, and calculating to obtain that the daily oil production capacity of the oil well of a development unit at the stage is reduced by 21.9 tons in total.
Step 104, obtaining the regular change well 82 according to the productivity change trend, and the productivity rising and falling well 45. According to the analysis template, classifying heavy-point change oil wells to obtain 5 new wells, 20 measures, 102 old wells and 22.1 tons of daily oil capacity which are respectively reduced by 0.6 tons, increased by 0.8 tons and reduced by 22.1 tons. The main reasons for the capacity change obtained by analysis are as follows: (1) old well productivity drops by 22.1 tons, with 3 tons decreasing regularly. The productivity of old wells is mainly reduced by 22 tons in daily oil production capacity due to 5 stops of engineering factors; 2 ports are damaged by sleeving, and daily oil production capacity is reduced by 7 tons; 3 sand producing wells, and daily oil production capacity is reduced by 7 tons. The capacity of the old well is increased mainly to treat the problem well, the effect is achieved, and the daily oil production capacity is increased by 6.6 tons; the injection production allocation takes effect, and the daily oil production capacity is increased by 1.6 tons; the parameter-optimized daily oil capacity increased by 2.7 tons. (2) The new well, measure well, phase is not incremental as shown in table 3.
Table 3 example application results summary table
Step 105, according to the capacity change in this stage, the following conclusion can be drawn: the dynamic situation of the unit oil reservoir is stable, but the following main factors affecting the productivity stability still exist: (1) The yield increasing capability of the new well is insufficient, and the new well is not put into production in the present month; (2) The take-over capability of the measure at the stage is insufficient, 1 port of the measure is newly added in the month, and the measure increment is low; (3) The production stopping well is increased, the operation well opening number is less, the production stopping number is larger than the maintenance well opening number, and the operation well treatment speed needs to be improved; (4) the well damage is concentrated; and (5) the problem water well treatment and water well allocation yield increase effect is good.
In order to solve the above problems, the following works are done in reservoir management: firstly, accelerating the storage and arrangement of new wells and measure take over workload; secondly, a problem water well treatment and injection production allocation scheme is well done around the potential well region; thirdly, analysis of failure reasons of the production stopping well is performed, the design of a pipe column is optimized, meanwhile, arrangement of operation power is performed, and operation timeliness is improved; fourthly, analyzing the sand production reason of the oil well and providing an energy supplementing scheme and a sand prevention optimizing scheme; fifthly, well casing damage cause analysis is performed, the fund investment of well shaft treatment is enhanced, and an optimal well shaft treatment scheme is established.
The method for analyzing the capacity of the oil well is applied to the mine, and the reasons of the capacity change are dissected layer by layer, so that a model and a method capable of analyzing the capacity change at any time point and any stage are formed, factors influencing the capacity change are intuitively reflected, the method is shallow and easy to understand, the operation is simple, and the adjustment direction is indicated for improving the capacity of the oil well in the next step. The mining field can analyze the single well change productivity of the development system or the development unit oil well by using the oil well productivity analysis method, analyze the main factors restricting the productivity change at the stage, and find the main adjustment direction for improving the productivity of the development system or the development unit. The invention forms a single well productivity classification analysis technical route applicable to different oil reservoir types and different development units. The invention is applicable to the analysis of the oil production capacity of any development type oil well, is convenient for technicians and managers to rapidly control the production situation, accurately finds the adjustment direction and the countermeasure for improving the productivity, improves the oil reservoir development effect, improves the oil field development quality and benefit, and has wide application prospect.
Claims (16)
1. The mining field application oil well productivity analysis method is characterized by comprising the following steps of:
step 1, establishing an oil well productivity analysis model and making a drawing board;
step 2, determining a selected area and analysis time for capacity analysis;
step 3, calculating the oil well productivity, and carrying out data analysis according to the plate model;
step 4, finding out the variable in the capacity change, putting the variable into an analysis plate, and calculating the quantity of each capacity change;
step 5, carrying out productivity analysis, finding out main factors influencing the productivity change, and making corresponding adjustment countermeasures;
in the step 1, an oil well productivity analysis model is established, wherein the model comprises three major categories 57 small items, and three major categories of new wells, measures and old wells are determined according to the changes of production horizons and production time, and codes are A, B, C respectively;
the new well production capacity A analyzes the production capacity change of the new well production in the current year, wherein the production capacity rising A1 is divided into new well production A1 (1), new well production A1 (2)2; the productivity decline A2 is subdivided into a new well production stopping A2 (1) and a new well descending A2 (2)2 items), and the change conditions of new well taking over capacity and new well production capacity in the current year are analyzed to reflect the production increase, production stabilizing capacity and descending rule of new well throwing;
the production capacity B of the measure well analyzes the production capacity change of the annual measure well, wherein the production capacity rising class B1 is divided into a measure well opening class B1 (1), a measure yield increasing class B1 (2) and a measure change class B1 (3)3; the productivity reduction B2 is subdivided into a measure stopping production B2 (1), a measure decreasing B2 (2) and a measure changing out B2 (3)3, so that the current year of measure well taking-over capability, the measure well decreasing condition and the change-in and change-out well production capability across a development layer are analyzed, and the current year of measure well yield increase, stable production capability and decreasing rule are reflected;
the old well productivity C analyzes the productivity change of the unchanged well of the annual production horizon and is divided into productivity increase C1, productivity decrease C2 and regular change C3;
the capacity rising old well C1 is divided into four categories of a well opening C1-1, an injection and production adjustment effect C1-2, a working condition well condition management C1-3 and a maintenance well C1-4, and the capacity rising rule brought by management work of an oil reservoir, a shaft and a water well is reflected;
the old well C2 with lowered productivity is divided into nine categories of well closing C2-1, imperfect well pattern C2-2, unbalanced injection and production relation C2-3, well failure C2-4, reservoir factor C2-5, well condition working condition influence C2-6, maintenance influence C2-7, daily management C2-8 and three-production thick oil C2-9;
the well productivity C3 is changed regularly, other oil well productivity with sufficient production time rate and regular change of productivity is analyzed, the oil well productivity comprises fluctuation rising C3-1(1) and regular decreasing C3-1-2, and the change condition of the dynamic situation of an oil reservoir is reflected.
2. The method for analyzing the capacity of the oil well applied to the mining field according to claim 1, wherein in the step 1, the old well opening C1-1 is subdivided into maintenance opening C1-1(1) and direct opening C1-2, the capacity increase caused by the increase of the opening number is reflected, and the old well utilization effect and benefit are evaluated.
3. The mining field application oil well productivity analysis method according to claim 1, wherein in the step 1, the injection and production adjustment effect C1-2 is subdivided into increasing the injection direction C1-2(1), the injection and production allocation C1-2(2, the water shutoff profile control C1-2(3), the water well re-layering C1-2(4), the problem water well treatment C1-2(5 and the underinjection treatment C1-2-6, which reflect the productivity increase brought by various operations of the injection and production adjustment, and are used for evaluating the effect and benefit of the injection and production adjustment operation.
4. The mining field application oil well productivity analysis method according to claim 1, wherein in step 1, the working condition well condition management C1-3 is subdivided into a well condition management C1-3(1), a working condition management C1-3(2, and a parameter optimization C1-3 # -, reflecting productivity recovery brought by casing management, downhole tool repair, and parameter optimization, for evaluating effects and benefits of wellbore management.
5. The method for analyzing the capacity of the oil well applied to the mining field according to claim 1, wherein in the step 1, the maintenance well C1-4 is subdivided into maintenance recovery C1-4(1) and maintenance production C1-4 is increased by 2, wherein the capacity is increased to maintenance recovery within 30 days after the maintenance well is opened; after the maintenance well is opened for 30 days, the productivity is increased to be maintained and increased, and the maintenance well recovery effect is evaluated.
6. The method of claim 1, wherein in step 1, the old well shut-in energy C2-1 analyzes the productivity of the well shut-in effect, including well transfer C2-1(1), engineering factor shut-in C2-1(2), casing failure shut-in C2-1(3, low benefit shut-in C2-1(4), adjacent well drilling shut-in C2-1(5), and other factor shut-in C2-1(6) for 6, and analyzes the well shut-in due to well pattern adjustment, down pipe string, deterioration of benefits, production operation of these factors, and reflects the productivity drop due to shut-in.
7. The method for analyzing the capacity of the oil well applied to the mining site according to claim 1, wherein in the step 1, the capacity of the oil well with the imperfect well pattern is reduced by C2-2, the capacity influenced by the poor perfection degree of the well pattern is analyzed, and the method comprises the steps of only taking no perfection potential C2-2(1), only taking no perfection potential C2-2(2), unidirectional effect no perfection potential C2-2(3), unidirectional effect effective perfection potential C2-2(4) and side bottom water propulsion C2-2(5), and the capacity change of the oil well with the imperfect well pattern is analyzed to reflect the influence of the adaptability of the current well pattern on the capacity.
8. The method for analyzing the capacity of the oil well applied to the mining site according to claim 1, wherein in the step 1, the capacity is reduced by C2-3 caused by unbalanced injection-production relation, the capacity change caused by the change of the injection-production relation is analyzed, wherein the capacity change comprises the long-term fixation of a streamline C2-3(1), the rebound after the injection-production adjustment is effective C2-3(2), the streamline change C2-3(3) and the interlayer interference C2-3(4), and the oil well capacity influenced by unbalanced three fields is analyzed, and the reduction of the production capacity of the oil well with unbalanced injection-production in stages is reflected.
9. The method for analyzing the capacity of the oil well applied to the mining site according to claim 1, wherein in the step 1, the capacity drop caused by the failure of the water well is C2-4, the capacity drop caused by the untimely management of the water well is analyzed, and the method comprises the steps of C2-4(1 of the well jacket damage, C2-4(2 of tool failure), C2-4(3 of underfilling of the water well and C2-4(4 of overfilling and underfilling of the water well, wherein the capacity of the oil well influenced by the abnormal working condition of the water well and the change of water filling quality is analyzed, and the influence of the water well management on the production capacity of the oil well in the stage is reflected.
10. The method for analyzing the capacity of the oil well applied to the mining site according to claim 1, wherein in the step 1, the capacity drop caused by reservoir factors is C2-5, the capacity influenced by the change of reservoir oil production index is analyzed, the capacity comprises the thick oil C2-5(1 and the sand C2-5, the change of the capacity of the oil well due to thick oil and sand is analyzed, and the basis is provided for the next treatment.
11. The method for analyzing the capacity of a mining site application well according to claim 1, wherein in step 1, the capacity is reduced by C2-6 due to the influence of the working conditions of the well, the method comprises the steps of pump pipe leakage reduction C2-6(1), seal failure reduction C2-6(2), sleeve damage reduction C2-6(3) and parameter adjustment C2-6 # -4, and the method is used for analyzing the changes of pipe column leakage, packer failure, sleeve deterioration and parameter adjustment oil well productivity, and reflecting the productivity reduction caused by working conditions and well condition changes.
12. The method for analyzing the capacity of the oil well applied to the mining field according to claim 1, wherein in the step 1, the capacity reduction caused by the maintenance influence is C2-7, which comprises the maintenance C2-7(1 to be recovered and the maintenance C2-7 to be reduced, wherein the capacity reduction is the maintenance C2 to be recovered within 30 days of the maintenance well opening; the productivity is reduced after the maintenance is started for 30 days, and the productivity reduction caused by the maintenance operation quality is reflected.
13. The method for analyzing the capacity of a mine site application well according to claim 1, wherein in the step 1, the daily management capacity is reduced by C2-8, and the production capacity reduction caused by the flushing effect C2-8(1), the watering effect C2-8(2) and the equipment maintenance C2-8(3) in the daily management process is analyzed.
14. The method for analyzing the capacity of a mining field oil well according to claim 1, wherein in the step 1, the production capacity of the heavy oil produced by three production periods is reduced by C2-9, and the production capacity reduction caused by the water return at three production periods of C2-9(1) and the decrease of the thermal production period of the heavy oil by C2-9(2) is analyzed.
15. The method according to claim 1, wherein in step 2, the selection area and the analysis time for the productivity analysis are determined, different development layers or production wells of different development units are selected as the analysis objects, and the analysis time is selected by comparing the time point with the time point, and the time period can be also selected by comparing the time period with the time period.
16. The method for analyzing the capacity of the oil well applied to the mine field according to claim 1, wherein in the step 3, the calculation of the capacity of the oil well is carried out, wherein the calculation comprises the steps of arranging the production horizon, the working schedule, the production time and the working fluid level of the oil well, calculating the daily fluid production capacity and/or daily oil production capacity and synthesizing water;
the calculation formula is as follows: daily liquid production capacity and/or daily oil production capacity = cumulative liquid production capacity and/or cumulative oil production/actual days of production;
wherein the accumulated liquid yield and/or the accumulated oil yield are the sum, unit and t of the accumulated liquid yield and/or the accumulated oil yield actually produced in the stage; the actual production days are the actual production days in the stage, namely the actual production hours per 24 units, d.
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