CN105426620B - Quantitative analysis method and device for main control factors of residual oil in oil layer - Google Patents
Quantitative analysis method and device for main control factors of residual oil in oil layer Download PDFInfo
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- 238000004445 quantitative analysis Methods 0.000 title claims abstract description 25
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
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Abstract
The invention provides a quantitative analysis method and a device for main control factors of residual oil in an oil layer, comprising the following steps of: determining the condition of the residual oil in each core according to the water washing data of each core; returning each core to each oil layer according to the depth of the stratum, and determining the condition of the residual oil of each oil layer; establishing a coring dissection well region by taking a coring well as a center; judging the influence of oil layer plane main control factors, inter-oil layer main control factors and intra-oil layer main control factors on the residual oil condition in each core according to the residual oil condition of each oil layer, and determining the residual oil main control factors of each core; and classifying and counting the thickness of the core according to the different oil layer types or deposition types of each core, and classifying and counting the thickness and the proportion of the core with different main control factors of the residual oil. The invention comprehensively applies dynamic and static data, reduces workload, simply and effectively clears subjective and objective factors and causes influencing residual oil in planes, layers and evaluates the potential of various residual oil.
Description
Technical field
The present invention relates to oil reservoir development processing technology field, more particularly to a kind of oil reservoir remaining oil Dominated Factors quantitative analysis
Method and device.
Background technology
Remaining oil refers mainly to an oil reservoir after the exploitation of a certain oil production method, the underground crude oil that cannot still produce.Generally
Including oil displacement agent involve less than region of bypassed oil in crude oil and oil displacement agent (water filling) fed through to but still drive not out residual oil
Two parts.Remaining oil number depend on geological conditions, oil property, oil displacement agent species, well pattern and production practice skill
Art.
It is basis and the foundation that different development phases oil field steps up recovery ratio to remaining oil distribution forecast and monitoring, passes
The static description of weighting, using prime stratum parameter, conceputal modeling and static models are compared in the research of system.Even if using various
Dynamic monitoring method describes remaining oil distribution, and the use of various methods is also relatively single, independent, such as using sealed coring well, production
The potentiality of remaining oil between fluid entry profile test, water logging logging evaluation oil reservoir；Oil reservoir is such as evaluated using tracer test, well logging
The potentiality of are-al remaining oil；Such as using material balance, WATER DISPLACEMENT CURVES, successively decrease the methods of evaluate the producing status of oil reservoir.It is above-mentioned
Prediction of the method to remaining oil, the technical data and means used is relatively single, can only be between macroscopic evaluation oil reservoir or plane is non-
The remaining oil for the single type that matter influences, lacks the origin cause of formation of remaining oil the quantitative assessment of Dominated Factors.
High water cut oil field remaining oil distribution is more complicated, high degree of dispersion, and fine remaining oil prediction has become technology development
Trend, although relatively advanced at present improvement logging in water flooded layer, meticulous pool description and Fine Reservoir Numerical integration skill
Art payes attention to being combined for dynamic static data, obtains remaining oil object characterization finer, but on precision of prediction and accuracy also
There are problem, the main dynamic static data complexity that includes needing is numerous, and workload is huge, in layer, interlayer heterogeneity and water logging
The complexity of situation and the interaction distribution of heterogeneous fluid, have influenced instrument, the accuracy of equipment identification and technology
Validity, the complete and accurate precision and result for having constrained remaining oil detailed predicting of data.
Contradiction rises to principal contradiction particularly in high water cut stage layer, and inefficient Xun Huan is serious, and conventional improve is involved
The validity of volume technique means is substantially reduced, and contradiction has become the bottleneck of high water cut oil field effective exploitation, the task of top priority in layer
It is the Dominated Factors and ratio that understanding understands remaining oil in layer, provides foundation to tap the latent power in layer, lack at present in effective layer and remain
Excess oil predicts quantitative assessment technology, is badly in need of tackling key problem research.
The content of the invention
An embodiment of the present invention provides a kind of oil reservoir remaining oil Dominated Factors quantitative analysis methods, are fully provided using sound state
Material, reduces workload, provides remaining oil prediction quantitative assessment technology in effective layer.This method includes：
According to the washing data of each core, the situation of remaining oil in each core is determined；
According to depth of stratum by each oil reservoir of each core parked, the situation of the remaining oil of each oil reservoir is determined；
Centered on coring well, coring dissection wellblock is established；
According to the remaining oil situation of each oil reservoir, shadow of the oil reservoir plane Dominated Factors to remaining oil situation in each core is judged
It rings, determines the remaining oil Dominated Factors of each core；The oil reservoir plane Dominated Factors include water injection well in coring dissection wellblock
The presence or absence of, the well spacing of the anisotropism of oil reservoir plane and water injection well and coring well；
According to the remaining oil situation of each oil reservoir, judge that Dominated Factors are to the shadow of remaining oil situation in each core between oil reservoir
It rings, determines the remaining oil Dominated Factors of each core；Dominated Factors include noting the difference adopted and note is adopted between oil reservoir between the oil reservoir
Switch DP；
According to the remaining oil situation of each oil reservoir, judge that Dominated Factors are to the shadow of remaining oil situation in each core in oil reservoir
It rings, determines the remaining oil Dominated Factors of each core；Dominated Factors include same oil reservoir in coring dissection wellblock in the oil reservoir
The note of interior sand body adopts corresponding situation, the rhythmic nature of each sand body in same oil reservoir, the interlayer and texture that are included in same oil reservoir and same
Permeability physical difference in one oil reservoir in same rhythm section；
The difference of type of reservoir or sedimentation type according to belonging to each core carries out classification statistics to the thickness of core,
And classification statistics is carried out to the core thickness with different remaining oil Dominated Factors and proportion.
In one embodiment, the remaining oil situation according to each oil reservoir judges oil reservoir plane Dominated Factors to each
The influence of remaining oil situation, specifically includes in core：
According to the perforation oil-water well well location map of each oil reservoir, the presence or absence of water injection well in coring dissection wellblock is determined；
According to the remaining oil situation of each oil reservoir, influence of the presence or absence of the water injection well to residual oil content in each core is judged；
Each Sedimentary microfacies, substratum plan view, sand thickness figure, porosity isopleth map according to where coring well,
The connection situation of single sand body in permeability isogram, saturation degree isogram and oil reservoir, determines the heterogeneous of each oil reservoir plane
Property；
According to the remaining oil situation of each oil reservoir, judge the anisotropism of each oil reservoir plane to remaining oil situation in each core
Influence；
Determine the distance of water injection well and coring well；
According to the content of remaining oil in each core, judge water injection well with the well spacing of coring well to remaining oil in each core
The influence of content.
In one embodiment, the remaining oil situation according to each oil reservoir, Dominated Factors are to each rock between judging oil reservoir
The influence of remaining oil situation, specifically includes in core：
According to the production liquid data of each oil reservoir perforation oil-water well and water suction data, determine to note between each oil reservoir in coring dissection wellblock
The difference adopted；
According to the remaining oil situation of each oil reservoir, judge to note the difference adopted to remaining oil situation in each core between each oil reservoir
It influences；
It is located at each oil reservoir note at coring to adopt in line flow range, and water injection well and producing well are without water suction, production liquid data
When, according to water injection well and distance, mean permeability and the free-boundary problem of coring well, estimation note adopts switch DP, judges to note
Adopt influence of the size of switch DP to remaining oil in each core.
In one embodiment, the remaining oil situation according to each oil reservoir judges that Dominated Factors are to each rock in oil reservoir
The influence of remaining oil situation, specifically includes in core：
Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts corresponding situation；
The note that sand body in same oil reservoir in wellblock is dissected according to the remaining oil situation and coring of each oil reservoir adopts corresponding situation,
Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts influence of the corresponding situation to remaining oil situation in each core；
Judge influence of the rhythmic nature of each sand body in same oil reservoir to remaining oil situation in each core；
Judge the influence of oil reservoir intraformational bed and texture to remaining oil situation in each core；
Judge influence of the permeability physical difference to remaining oil situation in each core in oil reservoir in same rhythm section.
The embodiment of the present invention additionally provides a kind of oil reservoir remaining oil Dominated Factors quantitative analysis device, fully applies sound state
Data reduces workload, provides remaining oil prediction quantitative assessment technology in effective layer.The device includes：
Remaining oil condition determining module for the washing data according to each core, determines remaining oil in each core
Situation；
Classifying module, for by each oil reservoir of each core parked, determining the remaining oil of each oil reservoir according to depth of stratum
Situation；
Module is established, for centered on coring well, establishing coring dissection wellblock；
Oil reservoir plane Dominated Factors influence module, for the remaining oil situation according to each oil reservoir, judge oil reservoir plane master control
Influence of the factor to remaining oil situation in each core determines the remaining oil Dominated Factors of each core；The oil reservoir plane master
Control factor includes the well of the presence or absence of water injection well, the anisotropism of oil reservoir plane and water injection well and coring well in coring dissection wellblock
Away from；
Dominated Factors influence module between oil reservoir, for the remaining oil situation according to each oil reservoir, judge Dominated Factors between oil reservoir
Influence to remaining oil situation in each core determines the remaining oil Dominated Factors of each core；Dominated Factors between the oil reservoir
Switch DP is adopted including noting the difference adopted and note between oil reservoir；
Dominated Factors influence module in oil reservoir, for the remaining oil situation according to each oil reservoir, judge Dominated Factors in oil reservoir
Influence to remaining oil situation in each core determines the remaining oil Dominated Factors of each core；Dominated Factors in the oil reservoir
The note that sand body in same oil reservoir in wellblock is dissected including coring adopts corresponding situation, and the rhythmic nature of each sand body, same in same oil reservoir
Permeability physical difference in the interlayer and texture and same oil reservoir included in oil reservoir in same rhythm section；
Sort out statistical module, for the type of reservoir or the difference of sedimentation type according to belonging to each core, to core
Thickness carries out classification statistics, and carries out classification system to the core thickness with different remaining oil Dominated Factors and proportion
Meter.
In one embodiment, the oil reservoir plane Dominated Factors influence module is specifically used for：
According to the perforation oil-water well well location map of each oil reservoir, the presence or absence of water injection well in coring dissection wellblock is determined；
According to the remaining oil situation of each oil reservoir, influence of the presence or absence of the water injection well to residual oil content in each core is judged；
Each Sedimentary microfacies, substratum plan view, sand thickness figure, porosity isopleth map according to where coring well,
The connection situation of single sand body in permeability isogram, saturation degree isogram and oil reservoir, determines the heterogeneous of each oil reservoir plane
Property；
According to the remaining oil situation of each oil reservoir, judge the anisotropism of each oil reservoir plane to remaining oil situation in each core
Influence；
Determine the distance of water injection well and coring well；
According to the content of remaining oil in each core, judge water injection well with the well spacing of coring well to remaining oil in each core
The influence of content.
In one embodiment, Dominated Factors influence module is specifically used between the oil reservoir：
According to the production liquid data of each oil reservoir perforation oil-water well and water suction data, determine to note between each oil reservoir in coring dissection wellblock
The difference adopted；
According to the remaining oil situation of each oil reservoir, judge to note the difference adopted to remaining oil situation in each core between each oil reservoir
It influences；
It is located at each oil reservoir note at coring to adopt in line flow range, and water injection well and producing well are without water suction, production liquid data
When, according to water injection well and distance, mean permeability and the free-boundary problem of coring well, estimation note adopts switch DP, judges to note
Adopt influence of the size of switch DP to remaining oil in each core.
In one embodiment, Dominated Factors influence module is specifically used in the oil reservoir：
Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts corresponding situation；
The note that sand body in same oil reservoir in wellblock is dissected according to the remaining oil situation and coring of each oil reservoir adopts corresponding situation,
Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts influence of the corresponding situation to remaining oil situation in each core；
Judge influence of the rhythmic nature of each sand body in same oil reservoir to remaining oil situation in each core；
Judge the influence of oil reservoir intraformational bed and texture to remaining oil situation in each core；
Judge influence of the permeability physical difference to remaining oil situation in each core in oil reservoir in same rhythm section.
In embodiments of the present invention, according to the washing data of each core, the situation of remaining oil in each core is determined；It presses
According to depth of stratum by each oil reservoir of each core parked, the situation of the remaining oil of each oil reservoir is determined；Centered on coring well, establish
Coring dissects wellblock；According to the situation of the remaining oil of each oil reservoir, Dominated Factors between oil reservoir plane Dominated Factors, oil reservoir are judged successively
With influence of the Dominated Factors in oil reservoir to remaining oil situation in each core, the remaining oil Dominated Factors of each core are determined；So
The difference of type of reservoir according to belonging to each core or sedimentation type afterwards carries out the thickness of core classification statistics, and to tool
The core thickness and proportion for having different remaining oil Dominated Factors carry out classification statistics.It is of the invention fully to be provided using sound state
Material, to analyze the Dominated Factors of remaining oil；By above-mentioned simple step with regard to the Dominated Factors of remaining oil can be obtained, reduce numerous
Miscellaneous workload saves human time, while provides remaining oil prediction quantitative assessment technology in effective layer.
Description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, not
Form limitation of the invention.In the accompanying drawings：
Fig. 1 is a kind of oil reservoir remaining oil Dominated Factors quantitative analysis method flow chart provided in an embodiment of the present invention；
Fig. 2 is coring dissection wellblock schematic diagram provided in an embodiment of the present invention；
Fig. 3 is perforation well location map provided in an embodiment of the present invention；
Fig. 4 is perforation well location sedimentary microfacies map provided in an embodiment of the present invention；
Fig. 5 is the remaining oil design sketch of planar depositions microfacies differentia influence provided in an embodiment of the present invention；
Fig. 6 is water injection well provided in an embodiment of the present invention and distance and water swelling elastomer design sketch at coring；
Fig. 7 is the remaining oil design sketch that interlayer note provided in an embodiment of the present invention adopts differentia influence；
Fig. 8 is that sand body connection and note adopt corresponding influence remaining oil design sketch in layer provided in an embodiment of the present invention；
Fig. 9 is the remaining oil that physical difference influences in the different rhythms and same rhythm section in layer provided in an embodiment of the present invention
Design sketch；
Figure 10 is intraformational bed provided in an embodiment of the present invention, in layer texture effects remaining oil design sketch；
Figure 11 is a kind of structure diagram of oil reservoir remaining oil Dominated Factors quantitative analysis device provided in an embodiment of the present invention.
Specific embodiment
Understand to make the object, technical solutions and advantages of the present invention clearer, it is right with reference to embodiment and attached drawing
The present invention is described in further details.Here, the exemplary embodiment and its explanation of the present invention be for explaining the present invention, but simultaneously
It is not as a limitation of the invention.
In the method for the influence factor of existing research remaining oil, using Fine Reservoir Numerical technology, the skill
Although art applies dynamic static data, but the dynamic static data complexity applied is numerous, influences the high-precision of remaining oil distribution
Prediction；The analytical procedure of the technology is complicated, and each link is required for tackling key problem to study, therefore obtains really reflecting surplus
The result of excess oil distribution so that workload and difficult degree become huge.
In addition, conventional coring well Remaining Oil Saturation Evaluation is the statistical analysis to single washing data, it is right using oil reservoir as unit
Each core according to it is strong, in, weak, not water flushed condition carry out thickness statistics, so as to obtain, each oil reservoir is weak, does not wash remaining oil
Size and ratio, evaluate the potentiality of remaining oil of each oil reservoir on a macro scale, it is right due to without using geology and other dynamic datas
The reason for remaining oil formation and factor in depth can not be analyzed and sorted out, and lack the guidance further taped the latent power to remaining oil
Power.
If static data can be moved with integrated application, and the influence of remaining oil can be just obtained using simple analytical procedure
Factor can thus solve above-mentioned problems of the prior art.Based on this, the present invention proposes a kind of oil reservoir remaining oil master control
Factor quantitative analysis method.
Fig. 1 is a kind of oil reservoir remaining oil Dominated Factors quantitative analysis method flow chart provided in an embodiment of the present invention, such as Fig. 1
Shown, the method for the present invention includes：
Step 101：According to the washing data of each core, the situation of remaining oil in each core is determined；
When it is implemented, this method is using the washing data of coring well core as the basis of research, it is each according to coring well
The washing data (strong, in, weak, not water flushed condition (may include oil displacement efficiency)) of core tentatively judge the residue of each core
Oily condition, wherein, what remaining oil situation referred to can be the residual oil content in each core number, it is general it is weak, do not wash it is (surplus
Excess oil content is more) be remaining oil potentiality target.
Step 102：According to depth of stratum by each core parked to each oil reservoir, the remaining oil situation of each oil reservoir is determined；
It when it is implemented, will be on each core parked to each oil reservoir group according to the coring depth of each core.Each oil reservoir group
In again comprising each substratum, the small layer depth model of geology that coring well is obtained in (oil reservoir in other words) tables of data is layered from oil field geologic
Value is enclosed, it, will be on core parked to each substratum according to the depth of each core coring.
Geological layering tables of data is a database file, and structure mainly includes：Jh represents that pound sign, x represent current layer
Well location abscissa, y represent that current layer well location ordinate, xcfzmc represent that substratum group names, xcfzds represent substratum grouping top
Deep, as shown in table 1 below, table 1 is geological layering database.
Table 1
| jh | X | y | xcfzmc | xcfzds |
| X6-12-JE24 | 25984.1 | 14601.2 | S2-2 | 923.4 |
| X6-12-JE24 | 25984.1 | 14601.2 | S2-2-1 | 926.4 |
| X6-12-JE24 | 25984.1 | 14601.2 | S2-3 | 927.8 |
| X6-12-JE24 | 25984.1 | 14601.2 | S3-3 | 988.8 |
| X6-12-JE24 | 25984.1 | 14601.2 | P1-3-2 | 1046.8 |
Coring depth according to each core can obtain the layer position residing for core, such as will be to No. 11 of X6-12-JE24 wells
Core, coring depth are 923.7 meters, can be playbacked to S2-2 layers.
Step 103：Centered on coring well, coring dissection wellblock is established；
When it is implemented, centered on coring well, before choosing coring, the oil-water well of each secondary well pattern on periphery, foundation takes
Core dissects wellblock.In the embodiment of the present invention, ensure that coring well can at least be located at (such as basic well pattern, one-time pad encryption in each secondary well pattern
Well pattern, secondary infilled well pattern) (note an is adopted) well spacing in the range of, it is contemplated that note the correspondence adopted, do not exceed at most
2-3 well spacing, and ensure that oil-water well number ratio is suitable as far as possible.
The present invention establishes coring dissection wellblock as shown in Figure 2, and basic well pattern is line drive water injection side of the cutting away from 2 kilometers
Formula, so having selected dissection well of 1 producing well away from well pattern based on, four mouthfuls of producing wells；One-time pad encryption well pattern has selected south
North, 4 mouthfuls of oil wells of each 1 well spacing of thing and 4 mouthfuls of well saliva wells are as dissection well；Secondary infilled well pattern has selected north and south within this range
2 well spacings, 6 mouthfuls of oil wells of 3 well spacings of thing, 6 mouthfuls of well saliva wells are as dissection well.
Step 104：According to the content of remaining oil in each core, judge oil reservoir plane Dominated Factors to being remained in each core
The influence of excess oil situation determines the remaining oil Dominated Factors of each core；The oil reservoir plane Dominated Factors are dissected including coring
The well spacing of the presence or absence of water injection well, the anisotropism of oil reservoir plane and water injection well and coring well in wellblock.
When it is implemented, first determine whether remaining oil caused by oil reservoir plane Dominated Factors.Step 104 includes following small
Step：
Step 1041：According to the perforation oil-water well well location map of each oil reservoir, the presence or absence of water injection well in coring dissection wellblock is determined；
According to remaining oil situation in each core, judge that the presence or absence of water injection well is to remaining oil situation in each core in coring dissection wellblock
Influence.
When it is implemented, the well location map of the actual production of each oil reservoir is drawn according to the oil-water well perforation situation of dissection wellblock,
To determine that coring is dissected in wellblock with the presence or absence of water injection well, situation is improved show actual flooding pattern in each oil reservoir plane.
If there is no water injection wells, if there are remaining oils, it is the shadow of remaining oil to judge no water injection well (i.e. flooding pattern is not perfect)
The factor of sound.
Perforated interval tables of data is a database file, and structure mainly includes：Jdds1 expression well sections top is deep, jdds2
Represent that deep well section bottom, yczmc expression oil reservoirs group name, xch represent that small level number, xfch represent subdivision level number, skhd expressions are penetrated out
Thickness, as shown in table 2 below, table 2 is perforated interval database.
Table 2
| jh | jdds1 | jdds2 | yczmc | xch | Xfch | skhd |
| X6-10-651 | 947.6 | 948.8 | S2 | 5 | 1 | 1.2 |
| X5-4-39 | 974.6 | 975.4 | S2 | 11 | 5 | 0.8 |
| X5-4-754 | 990.5 | 990.9 | S3 | 1 | 1 | 0.4 |
| X6-11-652 | 1077.7 | 1078.9 | P1 | 4 | 2 | 1.2 |
Fig. 3 is perforation well location map provided in an embodiment of the present invention, and be displayed without a bite water injection well in Fig. 3 gives birth in this layer of perforation
Production, and due to the core at this layer of coring not wash, so this layer of remaining oil Dominated Factors are that flooding pattern lacks water injection well, from
And cause remaining oil there are potentiality.
Step 1042：Each Sedimentary microfacies, substratum plan view, sand thickness figure, porosity according to where coring well
The connection situation of single sand body in isogram, permeability isogram, saturation degree isogram and oil reservoir, determines each oil reservoir plane
Anisotropism；According to the remaining oil situation of each oil reservoir, the influence of oil reservoir plane phase change and physical difference to remaining oil is judged.
When it is implemented, each layer sedimentary micro of coring wellblock, substratum plan view, sand thickness figure, hole are drawn first
The connection situation of single sand body, estimation plane are heterogeneous in degree isogram, permeability isogram, saturation degree isogram and layer
Degree；The plain heterogeneities such as Judge plane phase transformation, physical difference (refer to same oil reservoir the oil reservoir lithology of different position, physical property,
The variation of fluid properties) etc. influence of the factors to remaining oil.
Drawing for each layer sedimentary micro can be using all wells dissected in wellblock (no matter oil-water well is other, coring is front and rear, perforation
Whether), the information such as layer position, sedimentary micro are obtained from individual well sedimentation unit oil reservoir tables of data to generate sedimentary microfacies map, simultaneously
A certain range of well can be extended out to draw, comply with the sedimentation setting in big region.
Individual well sedimentation unit oil reservoir tables of data is a database file, and structure mainly includes：Jh expressions pound sign,
Yczmc represents that oil reservoir group name, cjwx represent sedimentary micro, as shown in table 3 below, and table 3 is individual well sedimentation unit oil reservoir database.
Table 4
| jh | yczmc | cjwx | Remarks |
| X5-4-138 | S2-1-1 | 3 | Nonbody sheet sand |
| X5-4-39 | S2-1-1 | 4 | Off-balancesheet |
| X5-4-753 | S2-1-1 | 2 | Main body sheet sand |
| X6-11-E23 | S2-1-1 | 3 | Nonbody sheet sand |
The distributary channel sand, main body sheet sand, nonbody seat shape of a certain oil reservoir are shown in Fig. 4 of the embodiment of the present invention
Sand, off-balancesheet, mud stone pinching etc. deposit the distribution of micro- (rock) phase, show that plane phase change is serious, physical difference is larger, therefore plane is non-
Homogeneous is the Dominated Factors for influencing remaining oil at this layer of coring；Fig. 5 left sides are Sedimentary microfacies figures, and the right is core washing
Data status figure, is compared by the right and left, it is known that being since the influence of narrow distributary channel makes this layer of coring well
Remaining oil enrichment.
Step 1043：Determine water injection well and the distance at coring；According to each oil reservoir remaining oil situation, judge water injection well with taking
Influence of the distance to remaining oil at core.
When it is implemented, calculating water injection well and the distance at coring in each oil reservoir plane, Judge plane well spacing size is to surplus
The influence of excess oil content.Well spacing sizes values are labeled on the perforation sedimentary micro well location map of above-mentioned Fig. 4, analysis oil-water well note is adopted
Whether connection and correspondence are applied to the fluid flowing at coring.Line segment with the arrow (solid line and void in Fig. 6 of the present embodiment
Line) show the distance of each water injection well of a certain oil reservoir and coring well, according to the sizes values of distance and plane geological property, judgement is
It is no to influence remaining oil, table 3 be water injection well with coring well apart from computational chart.
Table 3
| Pound sign | Level number | Distance (rice) |
| X6-10-649 | P2-3 | 334 |
| X6-11-649 | P2-3 | 256 |
| X6-1-134 | P2-3 | 252 |
| X6-20-649 | P2-3 | 302 |
| X5-4-138 | P2-3 | 364 |
| X6-11-651 | P2-3 | 191 |
| X6-1-X138 | P2-3 | 168 |
| X6-20-651 | P2-3 | 210 |
This layer of 168 meters of minimum range and sedimentary facies changes to off-balancesheet, nonbody sheet sand from main body sheet sand, it is possible to not
It washes；And the phase transformation of 191,210 meters of distances is also more serious, may not wash；Therefore these can all be referred to a factor ---
Influence of the plain heterogeneity to remaining oil.All at 250 meters or more at remaining five mouthfuls of water injection well and coring, even if sedimentary facies is all
Main body and nonbody sheet sand (being better than off-balancesheet), but in larger distance and as remaining oil Dominated Factors.
It is above-mentioned to have judged each oil reservoir are-al remaining oil Dominated Factors, if remaining oil is not by each oil reservoir plane Dominated Factors shadow
Loud, then it next needs to judge influence of the interlayer Dominated Factors to remaining oil.
Step 105：According to the remaining oil situation of each oil reservoir, Dominated Factors are to remaining oily in each core between judging oil reservoir
The influence of condition determines the remaining oil Dominated Factors of each core；Dominated Factors include noting the difference adopted between oil reservoir between the oil reservoir
Switch DP is adopted with note.
When it is implemented, step 105 includes following small step：
Step 1051：According to the production liquid data of each oil reservoir perforation oil-water well and water suction data, determine in coring dissection wellblock
The presence or absence of water injection well；According to the remaining oil situation of each oil reservoir, judge that the presence or absence of water injection well is to each core in coring dissection wellblock
The influence of middle remaining oil situation.
When it is implemented, mark coring dissection wellblock in each oil reservoir perforation oil-water well production liquid and water suction situation, from output,
In injection profile test database extract coring before each oil-water well, each layer production liquid water suction data, as long as once absorb water, just
The range line of the water injection well and coring well is designated as solid line, without being just designated as dotted line during once water suction, while according to by effect oil well
Production profile further whether each oil reservoir has injection and extraction, judge to note the difference adopted and its shadow to remaining oil between each layer
It rings, Fig. 7 display plane flooding patterns of embodiment are perfect, and well spacing and well pattern influence degree also appear to rationally, but intake profile is demonstrate,proved
Real 8 mouthfuls of wells are injected without a well in the layer, that is, the influence of difference that interlayer note is adopted to remaining oil is determined.
Injection profile test data table is a database file, and structure mainly includes：Jh represents pound sign, cw expression layers
Position, csrq represent testDate, and jdds1 represents that well section top is deep, and jdds2 represents that well section bottom is deep, and hd represents thickness, and zrl represents note
Enter amount, zrbfs represents injection percentage, as shown in table 5 below, and table 5 is injection (water suction) section plane test tables of data.
Table 5
| jh | cw | csrq | jdds1 | jdds2 | hd | zrl | zrbfs |
| X5-4-138 | SⅡ11 | 2004-6-7 | 967 | 970.3 | 1.9 | 2.15 | 34.6% |
| X5-4-138 | SⅢ2 | 2005-5-27 | 991.3 | 991.7 | 0.4 | 0.35 | 11.3% |
| X6-21-651 | PⅡ6 | 2002-3-1 | 1111.5 | 1113.2 | 1.7 | 0.1 | 2.84% |
| X6-1-139 | Sa II 16 | 2004-11-11 | 996.9 | 997.9 | 1.0 | 0.65 | 15.85% |
Output (production liquid) section plane test tables of data is a database file, and structure mainly includes：Jh represents pound sign, cw
Expression layer position, csrq represent testDate, and hd represents thickness, and rcyl1 represents that daily fluid production rate, hs represent aqueous, such as the following table 6 institute
Show, table 6 is production profile test data table.
Table 6
| jh | cw | csrq | hd | rcyl1 | hs |
| X5-41-652 | Sa II 3 | 2003-12-1 | 0.5 | 6.6 | 95.5% |
| X6-10-652 | Sa II 1 | 2003-12-7 | 0.6 | 1.8 | 77.8% |
| X6-11-650 | III 3-6 of Sa | 2002-6-6 | 0.5 | 2.1 | 81.4% |
Step 1052：It is located at each layer note at coring to adopt in line flow range, and water injection well and producing well are without water suction, production
During liquid data, according to water injection well and distance, mean permeability and its free-boundary problem of coring well, estimation note adopts startup pressure
Difference judges influence of the switch DP size to each oil reservoir remaining oil.
Specifically, being exactly the size that relatively more each note adopts switch DP and actual production pressure difference, adopt and open when this layer of all note
When dynamic pressure difference is both greater than actual production pressure difference, show that there are remaining oils for the layer；If this layer of all note is adopted switch DP and is both less than
During actual production pressure difference, show that remaining oil is not present in the layer.
It is above-mentioned to have judged each oil reservoir interlayer remaining oil Dominated Factors, if remaining oil is not by each oil reservoir interlayer Dominated Factors shadow
Loud, then it next needs to judge influence of the Dominated Factors to remaining oil in layer.
Step 106：According to the remaining oil situation of each oil reservoir, judge that Dominated Factors are to remaining oily in each core in oil reservoir
The influence of condition determines the remaining oil Dominated Factors of each core；Dominated Factors include same in coring dissection wellblock in the oil reservoir
The note of sand body adopts corresponding situation in one oil reservoir, the rhythmic nature of each sand body in same oil reservoir, the interlayer and line included in same oil reservoir
Permeability physical difference in reason and same oil reservoir in same rhythm section；
When it is implemented, step 106 includes following small step：
Step 1061：Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts corresponding situation；According to each core
The note of sand body adopts corresponding situation in same oil reservoir in content and coring the dissection wellblock of middle remaining oil, judges that coring dissects wellblock
In in same oil reservoir sand body note adopt influence to tackling remaining oil；
When it is implemented, Fig. 8 in the present embodiment adopts connected relation with the note that three company's well profiles demonstrate sand body in layer
Influence to remaining oil, when even well profile 1, the note for even having oil-water well on well profile 2 are adopted, but sand body does not connect；Lian Jing is cutd open
Again without actual injection during the 3 upper bottom portion sand body connection of face, sand body remaining oil in bottom in the oil reservoir is formd.
Step 1062：Judge influence of the rhythmic nature of each sand body in same oil reservoir to residual oil content in oil reservoir.
For positive rhythm formation, under the effect of gravity, water particle easily sinks, and makes water along lower part channelling and under positive rhythm formation
Portion's permeability higher, in lower flow faster, vertical permeability is also higher and higher in water particle sinking watching, gravity for injection water
Effect more give full play to, positive rhythm formation exacerbates lower part channelling so that remaining oil top gather, lower part remaining oil it is few or
Person does not have.And anti-rhythm oil reservoir and influence of the positive rhythm formation to remaining oil are exactly the opposite.
Fig. 9 in the present embodiment is three sand body rhythm sections in coring well this layer, and similar positive rhythm deposits；Each rhythm
The washing feature of section has notable difference, is washed by force during the core of bottom rhythm section is all, the core of middle and upper part rhythm section is not
It is more to wash ratio.
Step 1063：Analyze each oil reservoir intraformational bed, influence of the texture to remaining oil.
Figure 10 in the present embodiment is not wash core position according to remaining oil, and the well logging from core photo and coring well is bent
The effect of blocking of line signature analysis interlayer, texture to remaining oil.
Interlayer plays compartmentation to longitudinal oil-water movement.When there is interlayer in some oil reservoir, then water will not be transported above interlayer
It moves below interlayer so that remaining oil rich content under interlayer.
Step 1064：Analyze influence of the physical difference in same rhythm section to remaining oil.
Fig. 9 left sides component of the present embodiment is in the middle part rhythm section in positive rhythm formation, the high core of permeability its
Washing degree is higher, and the low core of permeability shows the potentiality of remaining oil.
Step 107：The difference of type of reservoir or sedimentation type according to belonging to each core, returns the thickness of core
Class counts, and carries out classification statistics to the core thickness with different remaining oil Dominated Factors and proportion.
Different sedimentation types are counted, such as channel sand, main body sheet sand, nonbody sheet sand, off-balancesheet, different remaining oil master controls
The core thickness of factor calculates the ratio that each several part accounts for total core thickness.
Table 7 is the remaining oil Dominated Factors evaluation outcome table of the present embodiment, reflects different oil reservoirs and different sedimentation types
The plane of oil reservoir, interlayer, in layer remaining oil scale, and give the more of the remaining oil that specific influence factor is influenced
Less and ratio, the next step for remaining oil, which is taped the latent power, specifies technique direction.
Table 7
Based on same inventive concept, a kind of oil reservoir remaining oil Dominated Factors quantitative analysis is additionally provided in the embodiment of the present invention
Device, as described in the following examples.Due to the principle that oil reservoir remaining oil Dominated Factors quantitative analysis device solves the problems, such as and oil
Layer remaining oil Dominated Factors quantitative analysis method is similar, therefore the implementation of oil reservoir remaining oil Dominated Factors quantitative analysis device can be with
Referring to the implementation of oil reservoir remaining oil Dominated Factors quantitative analysis, overlaps will not be repeated.It is used below, term " unit "
Or " module " can realize the combination of the software and/or hardware of predetermined function.Although the described device of following embodiment compared with
It is realized goodly with software, but the realization of the combination of hardware or software and hardware is also what may and be contemplated.
Figure 11 is a kind of structure diagram of oil reservoir remaining oil Dominated Factors quantitative analysis device provided in an embodiment of the present invention,
As shown in figure 11, including：
Remaining oil condition determining module 1101 for the washing data according to each core, determines remaining in each core
The situation of oil；
Classifying module 1102, for by each oil reservoir of each core parked, determining the residue of each oil reservoir according to depth of stratum
The situation of oil；
Module 1103 is established, for centered on coring well, establishing coring dissection wellblock；
Oil reservoir plane Dominated Factors influence module 1104, for the remaining oil situation according to each oil reservoir, judge oil reservoir plane
Influence of the Dominated Factors to remaining oil situation in each core determines the remaining oil Dominated Factors of each core；The oil reservoir is put down
Face Dominated Factors include the presence or absence of water injection well, the anisotropism of oil reservoir plane and water injection well and coring well in coring dissection wellblock
Well spacing；
Dominated Factors influence module 1105 between oil reservoir, for the remaining oil situation according to each oil reservoir, judge master control between oil reservoir
Influence of the factor to remaining oil situation in each core determines the remaining oil Dominated Factors of each core；Master control between the oil reservoir
Factor includes noting the difference adopted and note adopts switch DP between oil reservoir；
Dominated Factors influence module 1106 in oil reservoir, for the remaining oil situation according to each oil reservoir, judge master control in oil reservoir
Influence of the factor to remaining oil situation in each core determines the remaining oil Dominated Factors of each core；Master control in the oil reservoir
Factor includes in coring dissection wellblock the note of sand body in same oil reservoir and adopts corresponding situation, the rhythmic nature of each sand body in same oil reservoir,
Permeability physical difference in the interlayer and texture and same oil reservoir included in same oil reservoir in same rhythm section；
Sort out statistical module 1107, for the type of reservoir or the difference of sedimentation type according to belonging to each core, to rock
The thickness of core carries out classification statistics, and the core thickness with different remaining oil Dominated Factors and proportion are sorted out
Statistics.
It is specifically used for when it is implemented, the oil reservoir plane Dominated Factors influence module 1004：
According to the perforation oil-water well well location map of each oil reservoir, the presence or absence of water injection well in coring dissection wellblock is determined；
According to the remaining oil situation of each oil reservoir, influence of the presence or absence of the water injection well to residual oil content in each core is judged；
Each Sedimentary microfacies, substratum plan view, sand thickness figure, porosity isopleth map according to where coring well,
The connection situation of single sand body in permeability isogram, saturation degree isogram and oil reservoir, determines the heterogeneous of each oil reservoir plane
Property；
According to the remaining oil situation of each oil reservoir, judge the anisotropism of each oil reservoir plane to remaining oil situation in each core
Influence；
Determine the distance of water injection well and coring well；
According to the content of remaining oil in each core, judge water injection well with the well spacing of coring well to remaining oil in each core
The influence of content.
When it is implemented, Dominated Factors influence module 1005 is specifically used between the oil reservoir：
According to the production liquid data of each oil reservoir perforation oil-water well and water suction data, determine to note between each oil reservoir in coring dissection wellblock
The difference adopted；
According to the remaining oil situation of each oil reservoir, judge to note the difference adopted to remaining oil situation in each core between each oil reservoir
It influences；
It is located at each oil reservoir note at coring to adopt in line flow range, and water injection well and producing well are without water suction, production liquid data
When, according to water injection well and distance, mean permeability and the free-boundary problem of coring well, estimation note adopts switch DP, judges to note
Adopt influence of the size of switch DP to remaining oil in each core.
When it is implemented, Dominated Factors influence module 1006 is specifically used in the oil reservoir：
Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts corresponding situation；
The note that sand body in same oil reservoir in wellblock is dissected according to the remaining oil situation and coring of each oil reservoir adopts corresponding situation,
Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts influence of the corresponding situation to remaining oil situation in each core；
Judge influence of the rhythmic nature of each sand body in same oil reservoir to remaining oil situation in each core；
Judge the influence of oil reservoir intraformational bed and texture to remaining oil situation in each core；
Judge influence of the permeability physical difference to remaining oil situation in each core in oil reservoir in same rhythm section.
It is and current fine in conclusion the present invention to be to solve the quantitative analysis evaluations of remaining oil Dominated Factors as target
Research Numerical Simulation Techique and other single methods are compared, it fully applies sound state based on coring well water washes data
Data had both reduced numerous and diverse workload, saved human time, and it is flat simple, intuitively, fully and effectively to differentiate influence
Face, interlayer, in layer remaining oil subjective and objective factor and the origin cause of formation, clearly, accurately have rated the potentiality of all kinds of remaining oils, particularly
This method realizes the target for quantifying potentiality of remaining oil in layer for the first time, presents remaining oil distribution forecast and assessment technique to fine
Change, mobilism, the trend feature of medelling development, it is quick, efficient, accurate the characteristics of will be for increasingly complicated scattered remaining oil
It taps the latent power and the technical guarantee of strength is provided.
Obviously, those skilled in the art should be understood that each module of the above-mentioned embodiment of the present invention or each step can be with
It is realized with general computing device, they can concentrate on single computing device or be distributed in multiple computing devices
On the network formed, optionally, they can be realized with the program code that computing device can perform, it is thus possible to by it
Store and performed in the storage device by computing device, and in some cases, can be held with the order being different from herein
They are either fabricated to each integrated circuit modules or will be multiple in them by the shown or described step of row respectively
Module or step are fabricated to single integrated circuit module to realize.In this way, the embodiment of the present invention be not restricted to it is any specific hard
Part and software combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles of the invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of oil reservoir remaining oil Dominated Factors quantitative analysis method, which is characterized in that including：
According to the washing data of each core, the situation of remaining oil in each core is determined；
According to depth of stratum by each oil reservoir of each core parked, the situation of the remaining oil of each oil reservoir is determined；
Centered on coring well, coring dissection wellblock is established；
According to the remaining oil situation of each oil reservoir, influence of the oil reservoir plane Dominated Factors to remaining oil situation in each core is judged,
Determine the remaining oil Dominated Factors of each core；The oil reservoir plane Dominated Factors, which include water injection well in coring dissection wellblock, to be had
The well spacing of nothing, the anisotropism of oil reservoir plane and water injection well and coring well；
According to the remaining oil situation of each oil reservoir, influence of the Dominated Factors to remaining oil situation in each core between oil reservoir is judged, really
The remaining oil Dominated Factors of fixed each core；Dominated Factors adopt startup pressure including noting the difference adopted and note between oil reservoir between the oil reservoir
Difference；
According to the remaining oil situation of each oil reservoir, influence of the Dominated Factors to remaining oil situation in each core in oil reservoir is judged, really
The remaining oil Dominated Factors of fixed each core；Dominated Factors include sand body in same oil reservoir in coring dissection wellblock in the oil reservoir
Note adopt corresponding situation, the rhythmic nature of each sand body in same oil reservoir, the interlayer and texture that include in same oil reservoir and same oil reservoir
Permeability physical difference in interior same rhythm section；
The difference of type of reservoir or sedimentation type according to belonging to each core carries out classification statistics to the thickness of core, and right
Core thickness and proportion with different remaining oil Dominated Factors carry out classification statistics.
2. oil reservoir remaining oil Dominated Factors quantitative analysis method as described in claim 1, which is characterized in that described according to each oil
The remaining oil situation of layer, judges influence of the oil reservoir plane Dominated Factors to remaining oil situation in each core, specifically includes：
According to the perforation oil-water well well location map of each oil reservoir, the presence or absence of water injection well in coring dissection wellblock is determined；
According to the remaining oil situation of each oil reservoir, influence of the presence or absence of the water injection well to residual oil content in each core is judged；
Each Sedimentary microfacies, substratum plan view according to where coring well, sand thickness figure, porosity isopleth map, infiltration
The connection situation of single sand body in rate isogram, saturation degree isogram and oil reservoir determines the anisotropism of each oil reservoir plane；
According to the remaining oil situation of each oil reservoir, shadow of the anisotropism to remaining oil situation in each core of each oil reservoir plane is judged
It rings；
Determine the distance of water injection well and coring well；
According to the content of remaining oil in each core, judge water injection well with the well spacing of coring well to residual oil content in each core
Influence.
3. oil reservoir remaining oil Dominated Factors quantitative analysis method as described in claim 1, which is characterized in that described according to each oil
The remaining oil situation of layer, judges influence of the Dominated Factors to remaining oil situation in each core between oil reservoir, specifically includes：
According to the production liquid data of each oil reservoir perforation oil-water well and water suction data, determine to note what is adopted between each oil reservoir in coring dissection wellblock
Difference；
According to the remaining oil situation of each oil reservoir, judge to note between each oil reservoir the shadow of the difference adopted to remaining oil situation in each core
It rings；
It is located at each oil reservoir note at coring to adopt in line flow range, and when water injection well and producing well are without water suction, production liquid data, root
According to water injection well and distance, mean permeability and the free-boundary problem of coring well, estimation note adopts switch DP, judges that note adopts startup
Influence of the size of pressure difference to remaining oil in each core.
4. oil reservoir remaining oil Dominated Factors quantitative analysis method as described in claim 1, which is characterized in that described according to each oil
The remaining oil situation of layer, judges influence of the Dominated Factors to remaining oil situation in each core in oil reservoir, specifically includes：
Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts corresponding situation；
The note that sand body in same oil reservoir in wellblock is dissected according to the remaining oil situation and coring of each oil reservoir adopts corresponding situation, judges
The note of sand body adopts influence of the corresponding situation to remaining oil situation in each core in same oil reservoir in coring dissection wellblock；
Judge influence of the rhythmic nature of each sand body in same oil reservoir to remaining oil situation in each core；
Judge the influence of oil reservoir intraformational bed and texture to remaining oil situation in each core；
Judge influence of the permeability physical difference to remaining oil situation in each core in oil reservoir in same rhythm section.
5. a kind of oil reservoir remaining oil Dominated Factors quantitative analysis device, which is characterized in that including：
Remaining oil condition determining module for the washing data according to each core, determines the situation of remaining oil in each core；
Classifying module, for by each oil reservoir of each core parked, determining the situation of the remaining oil of each oil reservoir according to depth of stratum；
Module is established, for centered on coring well, establishing coring dissection wellblock；
Oil reservoir plane Dominated Factors influence module, for the remaining oil situation according to each oil reservoir, judge oil reservoir plane Dominated Factors
Influence to remaining oil situation in each core determines the remaining oil Dominated Factors of each core；The oil reservoir plane master control because
Element includes the well spacing of the presence or absence of water injection well, the anisotropism of oil reservoir plane and water injection well and coring well in coring dissection wellblock；
Dominated Factors influence module between oil reservoir, and for the remaining oil situation according to each oil reservoir, Dominated Factors are to every between judging oil reservoir
The influence of remaining oil situation in a core determines the remaining oil Dominated Factors of each core；Dominated Factors include between the oil reservoir
The difference adopted is noted between oil reservoir and note adopts switch DP；
Dominated Factors influence module in oil reservoir, for the remaining oil situation according to each oil reservoir, judge that Dominated Factors are to every in oil reservoir
The influence of remaining oil situation in a core determines the remaining oil Dominated Factors of each core；Dominated Factors include in the oil reservoir
The note of sand body adopts corresponding situation in same oil reservoir in coring dissection wellblock, the rhythmic nature of each sand body, same oil reservoir in same oil reservoir
Permeability physical difference in the interlayer and texture and same oil reservoir inside included in same rhythm section；
Sort out statistical module, for the type of reservoir or the difference of sedimentation type according to belonging to each core, to the thickness of core
Classification statistics is carried out, and classification statistics is carried out to the core thickness with different remaining oil Dominated Factors and proportion.
6. oil reservoir remaining oil Dominated Factors quantitative analysis device as claimed in claim 5, which is characterized in that the oil reservoir plane
Dominated Factors influence module and are specifically used for：
According to the perforation oil-water well well location map of each oil reservoir, the presence or absence of water injection well in coring dissection wellblock is determined；
According to the remaining oil situation of each oil reservoir, influence of the presence or absence of the water injection well to residual oil content in each core is judged；
Each Sedimentary microfacies, substratum plan view according to where coring well, sand thickness figure, porosity isopleth map, infiltration
The connection situation of single sand body in rate isogram, saturation degree isogram and oil reservoir determines the anisotropism of each oil reservoir plane；
According to the remaining oil situation of each oil reservoir, shadow of the anisotropism to remaining oil situation in each core of each oil reservoir plane is judged
It rings；
Determine the distance of water injection well and coring well；
According to the content of remaining oil in each core, judge water injection well with the well spacing of coring well to residual oil content in each core
Influence.
7. oil reservoir remaining oil Dominated Factors quantitative analysis device as claimed in claim 5, which is characterized in that main between the oil reservoir
Control factor influences module and is specifically used for：
According to the production liquid data of each oil reservoir perforation oil-water well and water suction data, determine to note what is adopted between each oil reservoir in coring dissection wellblock
Difference；
According to the remaining oil situation of each oil reservoir, judge to note between each oil reservoir the shadow of the difference adopted to remaining oil situation in each core
It rings；
It is located at each oil reservoir note at coring to adopt in line flow range, and when water injection well and producing well are without water suction, production liquid data, root
According to water injection well and distance, mean permeability and the free-boundary problem of coring well, estimation note adopts switch DP, judges that note adopts startup
Influence of the size of pressure difference to remaining oil in each core.
8. oil reservoir remaining oil Dominated Factors quantitative analysis device as claimed in claim 5, which is characterized in that main in the oil reservoir
Control factor influences module and is specifically used for：
Judge that the note of sand body in same oil reservoir in coring dissection wellblock adopts corresponding situation；
The note that sand body in same oil reservoir in wellblock is dissected according to the remaining oil situation and coring of each oil reservoir adopts corresponding situation, judges
The note of sand body adopts influence of the corresponding situation to remaining oil situation in each core in same oil reservoir in coring dissection wellblock；
Judge influence of the rhythmic nature of each sand body in same oil reservoir to remaining oil situation in each core；
Judge the influence of oil reservoir intraformational bed and texture to remaining oil situation in each core；
Judge influence of the permeability physical difference to remaining oil situation in each core in oil reservoir in same rhythm section.
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| CN108104806B (en) * | 2017-12-14 | 2021-04-16 | 中国石油化工股份有限公司 | Quantitative analysis method for residual oil distribution rule |
| CN111173507B (en) * | 2020-03-17 | 2023-04-07 | 中国石油化工股份有限公司 | High-water-cut oil field residual oil prediction method |
| CN111485875B (en) * | 2020-04-24 | 2020-12-25 | 克拉玛依市昂科能源科技有限公司 | Method for evaluating saturation degree of isochronous residual oil |
| CN111706317B (en) * | 2020-05-26 | 2023-07-25 | 中国石油天然气集团有限公司 | Method for determining distribution condition of residual oil in hypotonic reservoir in encryption adjustment area |
| CN114198072B (en) * | 2021-11-29 | 2023-10-17 | 中国海洋石油集团有限公司 | Optimal deployment method for water-flooding well pattern of multi-layer combined oil reservoir |
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