CN104458525B - A kind of conventional intrusive mercury curve characterizes the acquiring and processing method of microscopic void throat character - Google Patents
A kind of conventional intrusive mercury curve characterizes the acquiring and processing method of microscopic void throat character Download PDFInfo
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- CN104458525B CN104458525B CN201310416312.6A CN201310416312A CN104458525B CN 104458525 B CN104458525 B CN 104458525B CN 201310416312 A CN201310416312 A CN 201310416312A CN 104458525 B CN104458525 B CN 104458525B
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Abstract
A kind of conventional intrusive mercury curve characterizes the acquiring and processing method of microscopic void throat character, belongs to sedimentary rock reservoir study applied technical field, the conventional mercury pressuring data of collection, including test pressure and corresponds to into hydrargyrum saturation；By the total capillary pressure curve of comparison and hole capillary pressure curve, the venturi saturation intermediate value pressure spot in 5 key points and venturi capillary pressure curve on hole capillary pressure curve is chosen；The graph of a relation of these key points and total capillary pressure curve feature is set up, and sums up these relational expressions；Hole finally enters the pore throat of hydrargyrum saturation and total capillary pressure curve and finally enters hydrargyrum saturation good dependency；The product that hole saturation increases both cutoff pressure and the pore throat coefficient of variation is good with replacement pressure relation；Duty pressure and pore throat even size exponent function relation in hole saturation；Hole/larynx intersections of complex curve saturation is finally entered hydrargyrum saturation with hole and has good dependency；In venturi saturation, duty pressure has good exponential relationship with pore throat even size.
Description
Technical field
The present invention relates to a kind of conventional intrusive mercury curve characterizes the acquiring and processing method of microscopic void throat character, belong to deposition
Rock reservoir study applied technical field, gathered data calculate 5 key points of conventional intrusive mercury curve and constant speed intrusive mercury curve, so as to
The range of application of conventional intrusive mercury curve is widened, experiment fees and time is saved.
Background technology
Conventional pressure hydrargyrum experimental result can provide reservoir total pore size volume parameter curve.Due to the difference constant speed of experimental principle
Pressure hydrargyrum experimental result further segments hole, venturi volume parameter while reservoir total pore size volume parameter is provided.Set up permanent
Ram compression hydrargyrum capillary pressure curve and conventional capillary pressure curve conversion method, enable conventional pressure hydrargyrum solve constant speed pressure hydrargyrum and solve
Problem, widen the range of application of conventional pressure hydrargyrum experimental data, save experiment fees and time.
The content of the invention
The purpose of the present invention is：The acquisition process side that a kind of conventional intrusive mercury curve characterizes microscopic void throat character is provided
Method, the advantage of the more conventional pressure hydrargyrum experiment of constant speed pressure hydrargyrum experiment is that it can not only obtain total capillary pressure curve, and can be by
Venturi and hole separate, and respectively obtain venturi capillary pressure curve and hole capillary pressure curve.
A kind of conventional intrusive mercury curve characterizes the acquiring and processing method of microscopic void throat character, by conventional constant speed pressure hydrargyrum total hair
Pipe pressure Curve Subdivision, just getable venturi capillary pressure curve and hole capillary pressure are bent to be converted into constant speed pressure hydrargyrum method
Line, this can not only save substantial amounts of funds for the application of the wide variety of conventional capillary pressure curve for having obtained（Current constant speed pressure
Hydrargyrum tests 8000 yuan/block, and commonly presses hydrargyrum in 400 yuan/block or so）, and these results can be made full use of to reappraise storage
Layer, proves the mechanism of oil displacement of hole and venturi during water drive, chemical flooding, is that the further exploitation raising recovery ratio of oil reservoir has
Very important meaning.
The technical solution used in the present invention is：
A kind of conventional intrusive mercury curve characterizes the acquiring and processing method of microscopic void throat character, containing following steps：
Step 1, the conventional mercury pressuring data of collection；
The conventional mercury pressuring data of collection, including test pressure and correspond to into hydrargyrum saturation；
Step 2, the conventional capillary pressure curve relevant parameter of calculating；
Average capillary radius R:（μm）”;
Φ averages:Φ;
Sorting coefficient:σ;
Skewness:Sk;
Kurtosis:Kp;
The coefficient of variation:C;
Finally enter hydrargyrum saturation %:Sm;
Unsaturation percentage of pore volume %:Si;
Middle duty pressure（MPa）:P50;
Median radius（μm）:R50;
Replacement pressure（MPa）:Pd;
Maximum pore throat radius（μm）:Rm;
Mercury pressure P is entered in starting（MPa）:P0;
Uniformity coefficient:A;
Step 3, air void curve and venturi curve key parameter are calculated using correlation formula；
According to subordinate list 1, related air void curve and venturi curve key parameter are calculated;
Hole finally enters hydrargyrum saturation:Spm;
Hole saturation increases cutoff pressure:Ppm;
Hole saturation intermediate value point pressure:Pp50;
Hole/larynx intersections of complex curve saturation:Sc;
Venturi saturation intermediate value point pressure:Ph50;
Subordinate list 1
Step 4, calculate other relevant parameters；
Venturi finally enters hydrargyrum saturation:Shm=Sm-Spm；
Step 5, capillary pressure curve of being produced result according to above parameter；
According to original capillary pressure data and calculate parameter of curve point, make total capillary pressure curve,
Hole capillary pressure curve and venturi capillary pressure curve;
Step 6, make hole and venturi distribution histogram；
Step 7, the total capillary pressure curve of comparison and hole capillary pressure curve（Or venturi capillary pressure curve）, choose hole
5 key points on gap capillary pressure curve（Hole capillary pressure curve initial pressure point, hole finally enter hydrargyrum saturation point, hole
Gap saturation increases cutoff pressure point, hole saturation intermediate value pressure spot, hole/larynx intersections of complex curve saturation point）With venturi hollow billet
Venturi saturation intermediate value pressure spot on pressure curve.
The graph of a relation of these key points and total capillary pressure curve feature is set up, and sums up these relational expressions.With reference to
Dependency relation formula can be seen that hole finally to be entered the pore throat of hydrargyrum saturation and total capillary pressure curve and finally enters hydrargyrum saturation and have very
Good dependency；The product that hole saturation increases both cutoff pressure and the pore throat coefficient of variation is good with replacement pressure relation；
Duty pressure and pore throat even size exponent function relation in hole saturation；Hole/larynx intersections of complex curve saturation finally enters hydrargyrum saturation with hole
Degree is with good dependency；In venturi saturation, duty pressure has good exponential relationship with pore throat even size.
Beneficial effects of the present invention：" seven Middle East area gram the following group Conglomerate Reservoir Reservoir Microproperties of Karamay Oil Fields in Xinjiang
Good application is obtained in research " project, and obtains good effect, by the contrast with actual curve, be entirely capable of reaching and answer
Use purpose.
Description of the drawings
Fig. 1 is each key point schematic diagram.
Fig. 2 is that hole finally enters hydrargyrum saturation and pore throat finally enters hydrargyrum saturation dependency relation figure.
Fig. 3 is that hole saturation increases cutoff pressure with pore throat replacement pressure and the dependency relation figure of the coefficient of variation.
Fig. 4 is the dependency relation figure of duty pressure and pore throat even size in hole saturation.
Fig. 5 is the dependency relation figure that hole/larynx intersections of complex curve saturation and hole finally enter hydrargyrum saturation.
Fig. 6 is the dependency relation figure of duty pressure and pore throat even size in venturi saturation.
Fig. 7 is achievement capillary pressure curve figure.
Fig. 8 is hole and venturi distribution histogram.
Specific embodiment
Embodiment 1：As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, a kind of conventional intrusive mercury curve characterizes micro-
The acquiring and processing method of view hole gap throat character, containing following steps：
Step 1, gathered data;
The result of the test data of collection are as follows：Subordinate list 2
Step 2, the conventional capillary pressure curve relevant parameter of calculating；Subordinate list 3
Step 3 calculates air void curve and venturi curve key parameter using correlation formula；
Hole finally enters hydrargyrum saturation：0.0006*(66.58^2.5508)=26.86；
Hole saturation increases cutoff pressure：(0.3477*0.10^(-0.5955))/0.25=5.28；
Hole saturation intermediate value point pressure：(5*10^(-5))*(EXP(0.9333*9.89))=0.51；
Hole/larynx intersections of complex curve saturation：0.7234*26.86^1.0642=24.01；
Venturi saturation intermediate value point pressure：0.0839*(EXP(0.3224*9.89))=2.03；
Step 4, calculate other relevant parameters：Subordinate list 4
Venturi finally enters hydrargyrum saturation:66.58-26.86=39.72,
Interpolation result：Subordinate list 5
Step 5, capillary pressure curve of being produced result according to above parameter;
According to original capillary pressure data and the parameter of curve point for calculating, total capillary pressure curve, hole hollow billet pressure are made
Force curve and venturi capillary pressure curve, as shown in Figure 7;
Step 6, hole and venturi distribution histogram are made, as shown in Figure 8.
Claims (2)
1. a kind of conventional intrusive mercury curve characterizes the acquiring and processing method of microscopic void throat character, it is characterised in that collection is conventional to press
Hydrargyrum data, including test pressure and correspond to into hydrargyrum saturation；By the total capillary pressure curve of comparison and hole capillary pressure curve
Or by the total capillary pressure curve of comparison and venturi capillary pressure curve, choose 5 key points on hole capillary pressure curve
Pressure and intensity value, 5 key points be respectively hole capillary pressure curve starting point, hole saturation increase cut-off point,
Hole saturation median point, hole/larynx intersections of complex curve and venturi saturation median point；Set up these key points bent with total capillary pressure
The graph of a relation of line feature, and calculate hole finally enter the regression equation of hydrargyrum saturation, hole saturation increase cutoff pressure
Regression equation, the regression equation of duty pressure, the regression equation of hole/larynx intersections of complex curve saturation and venturi are full in hole saturation
With the regression equation of duty pressure in degree；Hole finally enters the pore throat of hydrargyrum saturation and total capillary pressure curve and finally enters hydrargyrum saturation
There is dependency；The product that hole saturation increases both cutoff pressure and the pore throat coefficient of variation is related to replacement pressure；Hole is satisfied
Have exponent relation with duty pressure in degree and pore throat even size；Hole/larynx intersections of complex curve saturation is finally entered hydrargyrum saturation with hole and is had
Dependency；In venturi saturation, duty pressure is had exponent relation with pore throat even size.
2. a kind of conventional intrusive mercury curve according to claim 1 characterizes the acquiring and processing method of microscopic void throat character,
It is characterized in that containing following steps；
Step 1, the conventional mercury pressuring data of collection；
The conventional mercury pressuring data of collection, including test pressure and correspond to into hydrargyrum saturation；
Step 2, the conventional capillary pressure curve relevant parameter of calculating；
Average capillary radius:R,μm；
Average:Φ；
Sorting coefficient:σ；
Skewness:Sk；
Kurtosis:Kp；
The coefficient of variation:C；
Finally enter hydrargyrum saturation:Sm, %；
Unsaturation percentage of pore volume:Si, %；
Middle duty pressure:P50, MPa；
Median radius:R50, μm；
Replacement pressure:Pd, MPa；
Maximum pore throat radius:Rm, μm；
Mercury pressure is entered in starting:P0, MPa；
Uniformity coefficient:A；
Step 3, air void curve and venturi curve key parameter are calculated using correlation formula；
According to subordinate list 1, related air void curve and venturi curve key parameter are calculated；
Hole finally enters hydrargyrum saturation:Spm；
Hole saturation increases cutoff pressure:Ppm；
Hole saturation intermediate value point pressure:Pp50；
Hole/larynx intersections of complex curve saturation:Sc；
Venturi saturation intermediate value point pressure:Ph50；
Subordinate list 1
Step 4, calculate other relevant parameters；
Venturi finally enters hydrargyrum saturation:Shm=Sm-Spm；
Step 5, capillary pressure curve of being produced result according to above parameter；
According to original capillary pressure data and the parameter of curve point for calculating, total capillary pressure curve, hole capillary pressure are made bent
Line and venturi capillary pressure curve；
Step 6, make hole and venturi distribution histogram.
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| CN106383078B (en) * | 2016-09-20 | 2019-05-07 | 中国石油天然气股份有限公司 | The determination method and device of rock waterflood efficiency |
| CN108204936B (en) * | 2016-12-16 | 2020-10-13 | 中国石油化工股份有限公司 | Characterization method of compact reservoir microscopic pore structure |
| CN107065033B (en) * | 2017-06-07 | 2019-06-25 | 中国石油大学(北京) | A kind of recognition methods of tight sandstone reservoir microcrack development and device |
| CN109632594B (en) * | 2017-10-27 | 2022-03-18 | 东北石油大学 | Method for characterizing pore throat characteristics of tight reservoir on basis of high-pressure mercury intrusion multi-scale |
| CN108268712B (en) * | 2018-01-05 | 2021-05-11 | 中国石油大学(北京) | Method and device for determining capillary pressure of pore medium by nuclear magnetic resonance |
| CN111693425B (en) * | 2019-03-14 | 2021-05-11 | 中国石油大学(北京) | Rock core film bound water saturation determination method based on mercury intrusion curve |
| CN111141650B (en) * | 2019-12-11 | 2021-03-30 | 中国地质大学（武汉） | Method for representing occurrence state of water in shale by utilizing frozen high-pressure mercury press |
| CN112326523A (en) * | 2020-09-18 | 2021-02-05 | 中国石油天然气股份有限公司 | Method and device for acquiring pore throat characteristic parameters, computer equipment and storage medium |
| CN113155694A (en) * | 2020-12-11 | 2021-07-23 | 中国石油天然气股份有限公司 | Reservoir flow porosity determination method based on constant-pressure mercury-pressing experiment |
| CN115506758A (en) * | 2021-06-04 | 2022-12-23 | 中国石油天然气股份有限公司 | Compact reservoir drainage pressure determination method, device, equipment and storage medium |
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