CN104653156A - Fragmental rock oil and gas reservoir development unit partitioning method - Google Patents
Fragmental rock oil and gas reservoir development unit partitioning method Download PDFInfo
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- CN104653156A CN104653156A CN201510031503.XA CN201510031503A CN104653156A CN 104653156 A CN104653156 A CN 104653156A CN 201510031503 A CN201510031503 A CN 201510031503A CN 104653156 A CN104653156 A CN 104653156A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention provides a fragmental rock oil and gas reservoir development unit partitioning method. The method is characterized in that an oil and gas reservoir with known injection-production pattern information is longitudinally and planely partitioned, so that the oil and gas reservoir is partitioned into more than two development units, the static connectivity and dynamic connectivity are analyzed for the plane partitioning, the fault properties and hydrodynamic property are further judged, the output ratio of two adjacent production wells is calculated, and finally a seepage field range and a main stream line position can be determined. Compared with the prior art, the partitioning of the development unit is in conjunction with the static and dynamic data of the oil and gas reservoir, and the partitioning of the development unit which is carried out by adopting the seepage field in the development as the unit can well conform to the real production of the oil and gas reservoir. The evaluation on the development effect of the fragmental rock oil and gas reservoir carried out on the basis of the method is more reasonable, the distribution of the residual oil is more clear and reliable, and the guidance significance on implementing the subsequent production means of the oil and gas reservoir and improving the recovery ratio can be realized.
Description
Technical field
The present invention relates to a kind of clastic oil-gas pools development block division methods, belong to mining technique field.
Background technology
Oil, gas are as one of most important energy in the current whole world, and its gross reserves is limited, and in developing of reservoirs, obtaining best development effectiveness (maximum efficient rate) in reasonable effective time is its core objective.But, how rationally, the development effectiveness of accurate evaluation oil-gas reservoir, method has obtained relatively consistent, but on opinion scale, existing division methods is not very desirable in Reservoir Development application.
When evaluating Reservoir Development effect, mainly carry out on several yardsticks such as individual well, flow unit, straticulate exploration and oil-gas reservoir at present.Developing effect assessment by individual well is evaluation unit minimum at present, although the method is careful, but to lacking test data, when the data such as particularly well testing, product are cutd open, remaining oil saturation test, be that unit is developed effect assessment and lacked reliable basis with individual well, and be that unit is developed effect assessment same seepage field may be caused artificially to be cut with individual well, cause " erroneous judgement " in evaluation.Effect assessment is developed by series of strata or oil-gas reservoir, very necessary to understanding oil-gas reservoir whole development effect, but the understanding of oil-gas reservoir Remaining Oil And Gas accumulation regions is then obviously lacked, and finds the steps necessary that Remaining Oil And Gas enrichment region is the measure of expansion raising recovery ratio.The maximum evaluation unit of current use is flow unit, and flow unit is between individual well and oil-gas reservoir, the reservoir units body split by physical property, lithologic interface and closed fault between sandstone reservoir.Its definition has a lot, but generally speaking, flow unit is the reservoirs having similar petrophysical property (comprising degree of porosity, permeability, non-homogeneity etc.) and make fluid continuous-flow.Flow unit division methods has sufficient foundation in geology, and current each field use is a lot, but, the static geologic parameter of the division Primary Reference of flow unit, and lack and consider the Development Factors such as development scheme transformation in the change of well net deployment, hydrodynamic condition and development process, therefore effect assessment is developed by flow unit, its evaluation result can only find to employ poor reservoirs, but the distribution of Remaining Oil And Gas is then unclear in interval, meanwhile, the deviation of regional area development response evaluation result and truth can also be caused.
Summary of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of clastic oil-gas pools development block division methods, from the angle that oil-gas reservoir is association of activity and inertia, consider the factors such as reservoir geology, tomography, hydrodynamic force, producing pattern and individual well productive rate, propose in clastic oil-gas pools exploitation, be that elementary cell develops effect assessment with development block, this opinion scale is more reasonable in Reservoir Development is evaluated, accurate.
The technical scheme that the present invention adopts for its technical problem of solution is: provide a kind of clastic oil-gas pools development block division methods, oil-gas reservoir known for flooding pattern information is carried out longitudinal direction to divide and plane division, oil-gas reservoir to be divided into more than 2 development blocks, specifically comprise the following steps:
(1) according to the division methods of Reservoir Development series of strata, longitudinal division is carried out to oil-gas reservoir, makes oil-gas reservoir be divided into one or more oily group in the vertical;
(2) oil-gas reservoir is carried out to the division of flat unit according to following steps:
(2-1) obtain static connectivity relationship: according to the Sandbody Types of each sand body in flooding pattern information, development condition and, thickness judges whether adjacent sand body is communicated with, and finally obtains the connected relation between the number of sand body in reservoir and adjacent sand body;
(2-2) dynamic connectivity relation is obtained:
Judge whether adjacent water injection well is communicated with producing well: if producing well flowing bottomhole pressure (FBHP) declines when producing well flowing bottomhole pressure (FBHP) gos up during water injection well water filling, water injection well stops water filling, then this adjacent water injection well and producing well connectedness good; Judge whether adjacent producing well is communicated with producing well: if when a bite producing well is gone into operation, adjacent producing well flowing bottomhole pressure (FBHP) declines, wherein a bite producing well after adjusting working system adjacent producing well flowing bottomhole pressure (FBHP) decline or rise, then adjacent production interwell communication;
The rule be not necessarily communicated with dynamically is above communicated with according to upper connection dynamic between well is then static between static upper connection, well, carry out the mutual checking between dynamic connectivity and static state connectedness, judge in conjunction with static connectivity relationship and dynamic connectivity relation, obtain seepage field scope and the main stream line position of reservoir;
(2-3) according to the fault information of reservoir, judge fault properties: if tomography is closed, then the seepage field of passing fault will detour, and when fault length exceedes the transversal scope of seepage field, this tomography becomes the packing border of this seepage field; If tomography opens, then tomography plays the effect expanding seepage field scope, and seepage field is through this tomography; The fault information of reservoir is known;
(2-4) judge hydrodynamic force character: according to the sedimentary facies of oil-gas reservoir, reservoir properties, non-homogeneity distribution and flooding pattern injection-production relation, judge the advantage fluctuation direction of seepage field, obtain the water inbound path of injection water, edge-bottom water; The sedimentary facies of oil-gas reservoir, reservoir properties, non-homogeneity distribute known;
(2-5) for the producing well be interconnected and producing well, by calculating adjacent producing well output ratio, determine seepage field boundary position, seepage field border is near the less producing well of output, and seepage field boundary position is determined to make oil-gas reservoir be divided into more than 2 development blocks in the plane.
The present invention is based on the beneficial effect that its technical scheme has to be:
The division of development block of the present invention combines oil-gas reservoir and moves static data, divides with the development block that the seepage field in developing carries out for unit the actual production more meeting oil-gas reservoir.The clastic oil-gas pools development response evaluation that basis of the present invention is carried out is more reasonable, and remaining oil distribution is clearer and more definite, reliable, has more directive significance to the enforcement walking production measure under oil-gas reservoir to improve recovery ratio.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention.
Fig. 2 is sand body Profile Correlation figure in the embodiment of the present invention.
Fig. 3 is the flat distribution map of phase closing well in correlation of sand bodies section in the embodiment of the present invention.
Fig. 4 is water injection well and production inter-well dynamic connectivity analytic process figure in the embodiment of the present invention.
Fig. 5 is producing well and production inter-well dynamic connectivity analytic process figure in the embodiment of the present invention.
Fig. 6 is II in the embodiment of the present invention
onoil group seepage field distribution scope and main stream line distribution map.
Fig. 7 is II in the embodiment of the present invention
underoil group seepage field distribution scope and main stream line distribution map.
Fig. 8 is II in the embodiment of the present invention
onoil group tomography is to development block scope restriction figure.
Fig. 9 is II in the embodiment of the present invention
underoil group tomography is to development block scope restriction figure.
Figure 10 is II in the embodiment of the present invention
onoil group development block division result figure.
Figure 11 is II in the embodiment of the present invention
underoil group development block division result figure.
Figure 12 is II in the embodiment of the present invention
onoil group flow unit division result figure.
Figure 13 is II in the embodiment of the present invention
underoil group flow unit division result figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
With reference to Fig. 1, the clastic ligh-oil reservoir (hereinafter referred to as " M oil reservoir ") that the present embodiment is being developed with certain, for object, for II in plane, develops dividing elements.M oil reservoir adopts 9 to adopt 6 note well patterns, and producing well has A1, A2, A3, A4, A5, A6, A7h, A15, A17h well, and water injection well has A8, A9, A10, A11, A12Sa, A13, A16 well, adopts a set of straticulate exploration, specifically comprises the following steps:
(1) longitudinal division is carried out to M oil reservoir:
Consider development technology technology and economy benefit, it longitudinally divides in units of straticulate exploration.Because the division of straticulate exploration has achieved the relatively consistent of understanding in educational circles at present, division methods, foundation are determined all, therefore, no longer stress at this.L is divided on M oil reservoir is longitudinal
1i, L
1iI
on, L
1iI
under, L
1iV
onand L
1iV
underfive oily group.
(2) M oil reservoir is carried out to the division of flat unit according to following steps:
(2-1) obtain static connectivity relationship: according to the Sandbody Types of each sand body in flooding pattern information, development condition and, thickness judges whether adjacent sand body is communicated with, and finally obtains the connected relation between the number of sand body in reservoir and adjacent sand body; Described static connectivity relationship is the splicing relation between the sand body of the reservoir of oil-gas reservoir and sand body;
The connecting degree of sand body is not only related to the density of waterflooding extraction mode and well pattern, also has influence on the final production efficiency of oil gas simultaneously.The contrast principle that the present embodiment mainly adopts " cycle contrasts; grading control ", first to carrying out oily group and detail stratigraphic division, then selects representational 3 correlation of sand bodies sections M oil reservoir to be carried out to the analysis of sand body connectedness, mainly set about from section, analyze the connectedness of each substratum sand body qualitatively.M oil reservoir is fan delta front deposition, and main Sandbody Types is braided stream, pigtail Liu Ba, point tributary waterway and river mouth bar, wherein braided stream and pigtail Liu Ba, divide many stacked alternately with estuary dam of tributary waterway to be normally communicated with.Choose representational section to analyze:
With reference to Fig. 2, for crossing the correlation of sand bodies section of A10-A4-A5-A6 well.
With reference to Fig. 3, section is positioned at the main body section of the western fan body along matter element system of M oil reservoir, and overall sand body is grown, in thick-layer shape, connective good.
1. L
1iI
underoil group:
Sand body only A10 well and A4 well bores chance, and A10 well place sand body is the thickest, sedimentary micro between major developmental pigtail stream dam and water channel; A4 well sand body is thinner, sedimentary micro between major developmental pigtail stream dam and water channel.Sand body extends thinning until the pinching of part sand body to A4 well.Sand body longitudinally and side direction splicing causes plane and longitudinally upper non-homogeneity is comparatively strong, better connective.
2. L
1iI
onoil group:
A10, A4 well scale of sand bodies is large, and connective good, major developmental has pigtail stream dam sedimentary micro, and A5, A6 well is based on braided stream, and scale of sand bodies is comparatively large, better connective.This oily group shows as the poor physical property regularity of distribution in middle good two ends, and sand thickness is also ascending to little, and in sand body plane, continuity better, longitudinal direction presss from both sides thin layers of mudstone, sandy ground is larger, and Si Koujing upwards mud stone thickness increases, and on vertical and horizontal, non-homogeneity is not strong.
According to said method, determine the link relation of each adjacent sand body between wells, between II oil group well, static connection situation is as shown in table 1.
Static connective table between table 1 well
(2-2) obtain dynamic connectivity relation: described dynamic connectivity close be the adjacent water injection well of reservoir with between producing well and adjacent producing well and the dynamic connected relation between producing well: judge whether adjacent water injection well is communicated with producing well: if producing well flowing bottomhole pressure (FBHP) declines when producing well flowing bottomhole pressure (FBHP) gos up during water injection well water filling, water injection well stops water filling, then this adjacent water injection well and producing well connectedness good; Judge whether adjacent producing well is communicated with producing well: if when a bite producing well is gone into operation, adjacent producing well flowing bottomhole pressure (FBHP) declines, wherein a bite producing well after adjusting working system adjacent producing well flowing bottomhole pressure (FBHP) decline or rise, then adjacent production interwell communication;
Adopt flowing bottomhole pressure (FBHP) analytic approach and the II oil group of inter-well interference analytic approach to M oil reservoir to carry out dynamic connectivity analysis, Fig. 4 is A3 well flowing bottomhole pressure (FBHP) curve map, and tired product is 0 ~ 2 × 10
4m
3between, the water filling of A9 well, A3 well flowing bottomhole pressure (FBHP) gos up, and A9 well stops water filling, and A3 well flowing bottomhole pressure (FBHP) declines, and illustrate that A9-A3 well connectedness is good, but between the flood period, A3 well flowing bottomhole pressure (FBHP) still has downward trend, illustrates that A9 well is shorted; Tired product is 4 ~ 4.6 × 10
4m
3between, A9 well and the water filling simultaneously of A13 well, A3 well flowing bottomhole pressure (FBHP) is stabilized in 12.4MPa, and tired product is 6 ~ 6.5 × 10
4m
3between, only A9 well water filling, A3 well flowing bottomhole pressure (FBHP) stationary value is less than 12.4MPa, thinks it is that A13 well affects the augmented injection of A3 well, judges that A13-A3 well is communicated with.Fig. 5 is A4 flowing bottomhole pressure (FBHP) curve map, and tired product is 3.5 ~ 4 × 10
4m
3between, A15 well is gone into operation, and A4 well flowing bottomhole pressure (FBHP) 10.65 bust, to 10.35MPa, illustrates to there is inter-well interference between A4 to A15 producing well, and A4 to A15 well is communicated with.Adopt above-mentioned judgement inter well connectivity method to analyze all the other inter well connectivity of II oil group, the dynamic connectivity of II oil group is as shown in table 2.
Table 2 inter-well dynamic connectivity table
The rule be not necessarily communicated with dynamically is above communicated with according to upper connection dynamic between well is then static between static upper connection, well, carry out the mutual checking between dynamic connectivity and static state connectedness, judge in conjunction with static connectivity relationship and dynamic connectivity relation, obtain seepage field scope and the main stream line position of reservoir, draw out each seepage field scope and main stream line position in well pattern, this seepage field scope is without the desirable seepage range under the factor such as tomography, reservoir properties restrictive condition, wherein II
onoil group seepage field distribution scope and main stream line distribution map as shown in Figure 6, II
underoil group seepage field distribution scope and main stream line distribution map are as shown in Figure 7.
(2-3) according to the fault information of reservoir, judge fault properties: if tomography is closed, then the seepage field of passing fault will detour, and when fault length exceedes the transversal scope of seepage field, this tomography becomes the packing border of this seepage field; If tomography opens, then tomography plays the effect expanding seepage field scope, and seepage field is through this tomography; The fault information of reservoir is known:
There is major fault in the south of M oil reservoir, respectively there is a craven fault in A3 well the western and eastern, and all the other tomographies are in containing outside area, are not considered.Because the tomography in present case is all in closed state, therefore, all cut-off at each seepage field passing by tomography.Closed fault, as a kind of border of development block, plays restriction to the scope of development block, and by the revised development block of tomography as shown in Figure 8,9, wherein Fig. 8 is II
onoil group tomography is to development block scope restriction figure, and Fig. 9 is II in the embodiment of the present invention
underoil group tomography is to development block scope restriction figure.
(2-4) judge hydrodynamic force character: according to the sedimentary facies of oil-gas reservoir, reservoir properties, non-homogeneity distribution and flooding pattern injection-production relation, judge the advantage fluctuation direction of seepage field, obtain the water inbound path of injection water, edge-bottom water; The sedimentary facies of oil-gas reservoir, reservoir properties, non-homogeneity distribute known:
M oil reservoir south is closed as major fault, its edge-bottom water is from northern lower location of the structure, arrange that orientation is consistent (except A13 well with water injection well, all water injection wells are arranged near the northern oils water boundary of oil reservoir and well pattern is substantially perfect), therefore, hydrodynamic force direction is consistent with main each seepage field main stream line direction, in present case, hydrodynamic force is discussed consistent with connective conclusion, but not all oil-gas reservoir is all like this, this depends on degree of perfection, hole pattern and Oil-gas Accumulation Types etc. that oil-gas reservoir well pattern is arranged.
(2-5) for the producing well be interconnected and producing well, by calculating adjacent producing well output ratio, determine seepage field boundary position, seepage field border is near the less producing well of output, and seepage field boundary position is determined to make oil-gas reservoir be divided into more than 2 development blocks in the plane:
In Reservoir Development, affect factor mainly reservoir properties and the producing pressure differential of development block size, and from permeation fluid mechanics Darcy formula, oil well yield is the function of permeability (reservoir properties) and producing pressure differential, therefore, the Boundary of adjacent development block can be determined by the ratio between adjacent producing well output.So, the true scope of the final development block of M oil reservoir can be obtained.Figure 10 is II
onoil group development block division result figure, Figure 11 is II
underoil group development block division result figure.
1. there is obvious disturbed condition for adjacent well near adjacent development block border, with each producing well initial production than for splitting a point foundation, development block border is in proportion near the development block that production capacity is less.As A11-A5, A11-A6 injection-production well combination in Figure 10, A11 well gives the water filling of A5, A6 well simultaneously, and A11 well is crossed in development block boundary line, and the initial production of A5 and A6 well is than being 33.6:58.9, and therefore development block boundary line is near A5 well.
2. for noiseless situation between adjacent well near adjacent development block border, comprehensively to split point according to the output of each layer of each well and formation capacity (KH).As the A16-A15 well group in Figure 11, connectivity analysis A10 is communicated with A4 well performance, and A16 well is not communicated with A4 well, can not determine whether A16 and A15 well is communicated with, and puts A16 well under A15 well place unit, A15 well and A4 well II when dividing development block
underoil group production test ratio is 40:67.5, and permeability ratio is A15:A4=69:120, and the final boundary line that divides is near A15 well.
In each accompanying drawing, WZ11-1N-1, WZ11-1N-2, WZ11-1N-3 and WZ11-1N-4 are prospect pit.
Development block division result shows, and plane is equivalent to several little seepage fields composition, and the inner seepage flow of development block is consistent, and between development block, hydrodynamic force varies in size, and impact scope is not of uniform size.Due to change and disturbance mutually that developing of reservoirs is exactly multiple seepage field in reservoir, therefore, the splitting scheme of development block is used more to meet the develop process model of oil-gas reservoir than the flow unit splitting scheme shown in Figure 12 and Figure 13, more accurate to the evaluation of Reservoir Development effect, wherein Figure 12 is II
onoil group flow unit division result figure, Figure 13 is II
underoil group flow unit division result figure.
Claims (1)
1. a clastic oil-gas pools development block division methods, is characterized in that, oil-gas reservoir known for flooding pattern information is carried out longitudinal direction and divides and plane division, oil-gas reservoir to be divided into more than 2 development blocks, specifically comprise the following steps:
(1) according to the division methods of Reservoir Development series of strata, longitudinal division is carried out to oil-gas reservoir, makes oil-gas reservoir be divided into one or more oily group in the vertical;
(2) oil-gas reservoir is carried out to the division of flat unit according to following steps:
(2-1) obtain static connectivity relationship: according to the Sandbody Types of each sand body in flooding pattern information, development condition and, thickness judges whether adjacent sand body is communicated with, and finally obtains the connected relation between the number of sand body in reservoir and adjacent sand body;
(2-2) dynamic connectivity relation is obtained:
Judge whether adjacent water injection well is communicated with producing well: if producing well flowing bottomhole pressure (FBHP) declines when producing well flowing bottomhole pressure (FBHP) gos up during water injection well water filling, water injection well stops water filling, then this adjacent water injection well and producing well connectedness good; Judge whether adjacent producing well is communicated with producing well: if when a bite producing well is gone into operation, adjacent producing well flowing bottomhole pressure (FBHP) declines, wherein a bite producing well after adjusting working system adjacent producing well flowing bottomhole pressure (FBHP) decline or rise, then adjacent production interwell communication;
The rule be not necessarily communicated with dynamically is above communicated with according to upper connection dynamic between well is then static between static upper connection, well, carry out the mutual checking between dynamic connectivity and static state connectedness, judge in conjunction with static connectivity relationship and dynamic connectivity relation, obtain seepage field scope and the main stream line position of reservoir;
(2-3) according to the fault information of reservoir, judge fault properties: if tomography is closed, then the seepage field of passing fault will detour, and when fault length exceedes the transversal scope of seepage field, this tomography becomes the packing border of this seepage field; If tomography opens, then tomography plays the effect expanding seepage field scope, and seepage field is through this tomography; The fault information of reservoir is known;
(2-4) judge hydrodynamic force character: according to the sedimentary facies of oil-gas reservoir, reservoir properties, non-homogeneity distribution and flooding pattern injection-production relation, judge the advantage fluctuation direction of seepage field, obtain the water inbound path of injection water, edge-bottom water; The sedimentary facies of oil-gas reservoir, reservoir properties, non-homogeneity distribute known;
(2-5) for the producing well be interconnected and producing well, by calculating adjacent producing well output ratio, determine seepage field boundary position, seepage field border is near the less producing well of output, and seepage field boundary position is determined to make oil-gas reservoir be divided into more than 2 development blocks in the plane.
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| CN110685651A (en) * | 2019-10-14 | 2020-01-14 | 重庆科技学院 | Yield splitting method and system for multilayer commingled production gas well |
| CN111749688A (en) * | 2020-08-10 | 2020-10-09 | 西南石油大学 | Method for predicting development position and direction of dominant seepage channel |
| CN112049619A (en) * | 2019-05-20 | 2020-12-08 | 中国石油天然气股份有限公司 | Well group relation display method and division method for water injection well and oil production well |
| CN112459766A (en) * | 2019-09-09 | 2021-03-09 | 中国石油天然气股份有限公司 | Method and device for partitioning compound oil and gas reservoir |
| CN112943211A (en) * | 2021-05-06 | 2021-06-11 | 中国石油天然气股份有限公司青海油田分公司 | Horizontal well spacing method applied to carbonate reservoir |
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| CN106065771A (en) * | 2016-07-25 | 2016-11-02 | 中国石油天然气股份有限公司 | A kind of hypotonic Water-bearing Gas Reservoir builds the method and device producing constituency |
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| CN106285659B (en) * | 2016-08-17 | 2020-01-07 | 中国石油天然气股份有限公司 | Hypotonic lithology heterogeneous gas reservoir development unit division method |
| CN112049619A (en) * | 2019-05-20 | 2020-12-08 | 中国石油天然气股份有限公司 | Well group relation display method and division method for water injection well and oil production well |
| CN112459766A (en) * | 2019-09-09 | 2021-03-09 | 中国石油天然气股份有限公司 | Method and device for partitioning compound oil and gas reservoir |
| CN110685651A (en) * | 2019-10-14 | 2020-01-14 | 重庆科技学院 | Yield splitting method and system for multilayer commingled production gas well |
| CN111749688A (en) * | 2020-08-10 | 2020-10-09 | 西南石油大学 | Method for predicting development position and direction of dominant seepage channel |
| CN111749688B (en) * | 2020-08-10 | 2022-03-18 | 西南石油大学 | Method for predicting development position and direction of dominant seepage channel |
| CN112943211A (en) * | 2021-05-06 | 2021-06-11 | 中国石油天然气股份有限公司青海油田分公司 | Horizontal well spacing method applied to carbonate reservoir |
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