CN104458525A - Acquisition and processing method for characterizing characteristics of micro-pore throat by conventional mercury intrusion curve - Google Patents
Acquisition and processing method for characterizing characteristics of micro-pore throat by conventional mercury intrusion curve Download PDFInfo
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- CN104458525A CN104458525A CN201310416312.6A CN201310416312A CN104458525A CN 104458525 A CN104458525 A CN 104458525A CN 201310416312 A CN201310416312 A CN 201310416312A CN 104458525 A CN104458525 A CN 104458525A
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 60
- 239000011148 porous material Substances 0.000 title claims abstract description 31
- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 230000014509 gene expression Effects 0.000 claims abstract description 3
- 239000011800 void material Substances 0.000 claims description 13
- 210000000867 larynx Anatomy 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A conventional mercury intrusion curve representation microscopic pore throat characteristic collection processing method belongs to the technical field of sedimentary rock reservoir research and application, and conventional mercury intrusion data including test pressure and corresponding mercury intrusion saturation are collected; selecting 5 key points on the pore capillary pressure curve and a throat saturation median pressure point on the throat capillary pressure curve by comparing the total capillary pressure curve with the pore capillary pressure curve; establishing a relational graph of the key points and the characteristics of the total capillary pressure curve, and summarizing relational expressions; the final mercury inlet saturation of the pores has good correlation with the final mercury inlet saturation of the pore throats of the total capillary pressure curve; the product of the pore saturation growth cutoff pressure and the pore throat variation coefficient has a good relation with the displacement pressure; the pore saturation median pressure is exponentially related to the pore throat mean; the saturation of the intersection point of the pore/throat curve has good correlation with the final mercury inlet saturation of the pore; the throat saturation median pressure has a good exponential relationship with the pore throat mean.
Description
Technical field
The present invention relates to the acquiring and processing method that a kind of conventional intrusive mercury curve characterizes microscopic void throat character, belong to sedimentogeneous rock reservoir study applied technical field, image data, calculate conventional intrusive mercury curve and constant speed intrusive mercury curve 5 key points, thus widen the range of application of conventional intrusive mercury curve, save experiment fees and time.
Background technology
Conventional pressure mercury experimental result can provide reservoir total pore size volume parametric line.Because the difference constant speed pressure mercury experimental result of experimental principle segments hole, venturi volumetric parameter further while providing reservoir total pore size volume parameter.Set up constant speed pressure mercury capillary pressure curve and conventional capillary pressure curve conversion method, the problem making conventional pressure mercury can solve constant speed pressure mercury to solve, widens conventional range of application of pressing mercury experimental data, saving experiment fees and time.
Summary of the invention
The object of the invention is: provide a kind of conventional intrusive mercury curve to characterize the acquiring and processing method of microscopic void throat character, the advantage of the more conventional pressure mercury experiment of constant speed pressure mercury experiment is that it can not only obtain total capillary pressure curve, and venturi and hole can be separated, obtain venturi capillary pressure curve and hole capillary pressure curve respectively.
A kind of conventional intrusive mercury curve characterizes the acquiring and processing method of microscopic void throat character, by the total capillary pressure curve segmentation of conventional constant speed pressure mercury, convert constant speed pressure mercury method just getable venturi capillary pressure curve and hole capillary pressure curve to, this application for the wide variety of conventional capillary pressure curve obtained can not only save a large amount of funds, and (current constant speed pressure mercury tests 8000 yuan/block, and common pressure mercury is about 400 yuan/block), and these results revaluation reservoir can be made full use of, prove hole and venturi in water drive, oil-displacement mechanism in chemical flooding process, further exploitation for oil reservoir improves recovery ratio very important meaning.
The technical solution used in the present invention is:
Conventional intrusive mercury curve characterizes an acquiring and processing method for microscopic void throat character, containing following steps:
Step 1, gather conventional mercury pressuring data;
Gather conventional mercury pressuring data, comprise test pressure and correspondence enters mercury saturation;
Step 2, calculate conventional capillary pressure curve correlation parameter;
Average capillary radius R:(μm) ";
Φ average: Φ;
Sorting coefficient: σ;
Skewness: Sk;
Kurtosis: Kp;
The coefficient of variation: C;
Finally enter mercury 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;
Initial enter mercury pressure P(MPa): P0;
Uniformity coefficient: A;
Step 3, correlation formula is utilized to calculate air void curve and venturi curve key parameter;
According to subordinate list 1, calculate relevant air void curve and venturi curve key parameter;
Hole finally enters mercury saturation: Spm;
Hole saturation degree increases cutoff pressure: Ppm;
Hole saturation degree median point pressure: Pp50;
Hole/larynx intersections of complex curve saturation degree: Sc;
Venturi saturation degree median point pressure: Ph50;
Subordinate list 1
Step 4, calculate other correlation parameters;
Venturi finally enters mercury saturation: Shm=Sm-Spm;
Step 5, capillary pressure curve of producing result according to above parameter;
According to the parameter of curve point of original capillary pressure data and calculating, make total capillary pressure curve,
Hole capillary pressure curve and venturi capillary pressure curve;
Step 6, make hole and venturi distribution histogram;
Step 7, more total capillary pressure curve and hole capillary pressure curve (or venturi capillary pressure curve), to choose on hole capillary pressure curve the venturi saturation degree intermediate value spot pressure on 5 key points (hole capillary pressure curve initial pressure point, hole finally enter mercury saturation point, hole saturation degree increases cutoff pressure point, hole saturation degree intermediate value spot pressure, hole/larynx intersections of complex curve saturation degree point) and venturi capillary pressure curve.
Set up the graph of a relation of these key points and total capillary pressure curve feature, and sum up these relational expressions.Can find out in conjunction with correlationship formula, the pore throat that hole finally enters mercury saturation and total capillary pressure curve finally enters mercury saturation good correlativity; Product and the replacement pressure relation of hole saturation degree growth cutoff pressure and the pore throat coefficient of variation are good; Duty pressure and pore throat even size exponent function relation in hole saturation degree; Hole/larynx intersections of complex curve saturation degree and hole finally enter mercury saturation and have good correlativity; In venturi saturation degree, duty pressure and pore throat even size have good exponential relationship.
Beneficial effect of the present invention: obtain good application in " organizing the research of Conglomerate Reservoir Reservoir Microproperties under Middle East area of Karamay Oil Fields in Xinjiang seven gram " project, and obtain good effect, by the contrast with actual curve, can application purpose be reached completely.
Accompanying drawing explanation
Fig. 1 is each key point schematic diagram.
Fig. 2 is that hole finally enters mercury saturation and pore throat finally enters mercury saturation correlationship figure.
Fig. 3 is the correlationship figure that hole saturation degree increases cutoff pressure and pore throat replacement pressure and the coefficient of variation.
Fig. 4 is the correlationship figure of duty pressure and pore throat even size in hole saturation degree.
Fig. 5 is the correlationship figure that hole/larynx intersections of complex curve saturation degree and hole finally enter mercury saturation.
Fig. 6 is the correlationship figure of duty pressure and pore throat even size in venturi saturation degree.
Fig. 7 is achievement capillary pressure curve figure.
Fig. 8 is hole and venturi distribution histogram.
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 the acquiring and processing method of microscopic void throat character, containing following steps:
Step 1, image data;
The test findings data gathered are as follows: subordinate list 2
Step 2, calculate conventional capillary pressure curve correlation parameter; Subordinate list 3
Step 3 utilizes correlation formula to calculate air void curve and venturi curve key parameter;
Hole finally enters mercury saturation: 0.0006* (66.58^2.5508)=26.86;
Hole saturation degree increases cutoff pressure: (0.3477*0.10^ (-0.5955))/0.25=5.28;
Hole saturation degree median point pressure: (5*10^ (-5)) * (EXP (0.9333*9.89))=0.51;
Hole/larynx intersections of complex curve saturation degree: 0.7234*26.86^1.0642=24.01;
Venturi saturation degree median point pressure: 0.0839* (EXP (0.3224*9.89))=2.03;
Step 4, calculate other correlation parameters: subordinate list 4
Venturi finally enters mercury saturation: 66.58-26.86=39.72,
Interpolation result: subordinate list 5
Step 5, capillary pressure curve of producing result according to above parameter;
According to the parameter of curve point of original capillary pressure data and calculating, make total capillary pressure curve, hole capillary pressure curve and venturi capillary pressure curve, as shown in Figure 7;
Step 6, make hole and venturi distribution histogram, as shown in Figure 8.
Claims (2)
1. conventional intrusive mercury curve characterizes an acquiring and processing method for microscopic void throat character, it is characterized in that gathering conventional mercury pressuring data, comprises test pressure and correspondence enters mercury saturation; By more total capillary pressure curve and hole capillary pressure curve (or venturi capillary pressure curve), to choose on hole capillary pressure curve the venturi saturation degree intermediate value spot pressure on 5 key points (hole capillary pressure curve initial pressure point, hole finally enter mercury saturation point, hole saturation degree increases cutoff pressure point, hole saturation degree intermediate value spot pressure, hole/larynx intersections of complex curve saturation degree point) and venturi capillary pressure curve; Set up the graph of a relation of these key points and total capillary pressure curve feature, and sum up these relational expressions; The pore throat that hole finally enters mercury saturation and total capillary pressure curve finally enters mercury saturation good correlativity; Product and the replacement pressure relation of hole saturation degree growth cutoff pressure and the pore throat coefficient of variation are good; Duty pressure and pore throat even size exponent function relation in hole saturation degree; Hole/larynx intersections of complex curve saturation degree and hole finally enter mercury saturation and have good correlativity; In venturi saturation degree, duty pressure and pore throat even size have good exponential relationship.
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, gather conventional mercury pressuring data;
Gather conventional mercury pressuring data, comprise test pressure and correspondence enters mercury saturation;
Step 2, calculate conventional capillary pressure curve correlation parameter;
Average capillary radius R:(μm) ";
Φ average: Φ;
Sorting coefficient: σ;
Skewness: Sk;
Kurtosis: Kp;
The coefficient of variation: C;
Finally enter mercury 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;
Initial enter mercury pressure P(MPa): P0;
Uniformity coefficient: A;
Step 3, correlation formula is utilized to calculate air void curve and venturi curve key parameter;
According to subordinate list 1, calculate relevant air void curve and venturi curve key parameter;
Hole finally enters mercury saturation: Spm;
Hole saturation degree increases cutoff pressure: Ppm;
Hole saturation degree median point pressure: Pp50;
Hole/larynx intersections of complex curve saturation degree: Sc;
Venturi saturation degree median point pressure: Ph50;
Subordinate list 1
Step 4, calculate other correlation parameters;
Venturi finally enters mercury saturation: Shm=Sm-Spm;
Step 5, capillary pressure curve of producing result according to above parameter;
According to the parameter of curve point of original capillary pressure data and calculating, make total capillary pressure curve, hole capillary pressure curve and venturi capillary pressure curve;
Step 6, make hole and venturi distribution histogram.
Step 7, more total capillary pressure curve and hole capillary pressure curve (or venturi capillary pressure curve), to choose on hole capillary pressure curve the venturi saturation degree intermediate value spot pressure on 5 key points (hole capillary pressure curve initial pressure point, hole finally enter mercury saturation point, hole saturation degree increases cutoff pressure point, hole saturation degree intermediate value spot pressure, hole/larynx intersections of complex curve saturation degree point) and venturi capillary pressure curve.
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| CN106383078A (en) * | 2016-09-20 | 2017-02-08 | 中国石油天然气股份有限公司 | Method and device for determining water drive efficiency of rock |
| CN107065033A (en) * | 2017-06-07 | 2017-08-18 | 中国石油大学(北京) | A kind of recognition methods of tight sandstone reservoir microcrack development and device |
| CN108204936A (en) * | 2016-12-16 | 2018-06-26 | 中国石油化工股份有限公司 | The characterizing method of compact reservoir micropore structure |
| CN108268712A (en) * | 2018-01-05 | 2018-07-10 | 中国石油大学(北京) | The method and apparatus that nuclear magnetic resonance determines pore media capillary pressure |
| CN109632594A (en) * | 2017-10-27 | 2019-04-16 | 东北石油大学 | A method of based on high-pressure mercury Multi-scale characterization compact reservoir pore throat characteristic |
| CN111141650A (en) * | 2019-12-11 | 2020-05-12 | 中国地质大学（武汉） | Method for representing occurrence state of water in shale by utilizing frozen high-pressure mercury press |
| CN111693425A (en) * | 2019-03-14 | 2020-09-22 | 中国石油大学(北京) | Rock core film bound water saturation determination method based on mercury intrusion curve |
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| 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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| CN106383078B (en) * | 2016-09-20 | 2019-05-07 | 中国石油天然气股份有限公司 | Method and device for determining water drive efficiency of rock |
| CN106383078A (en) * | 2016-09-20 | 2017-02-08 | 中国石油天然气股份有限公司 | Method and device for determining water drive efficiency of rock |
| CN108204936A (en) * | 2016-12-16 | 2018-06-26 | 中国石油化工股份有限公司 | The characterizing method of compact reservoir micropore structure |
| 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 |
| CN107065033A (en) * | 2017-06-07 | 2017-08-18 | 中国石油大学(北京) | A kind of recognition methods of tight sandstone reservoir microcrack development and device |
| 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 |
| CN109632594A (en) * | 2017-10-27 | 2019-04-16 | 东北石油大学 | A method of based on high-pressure mercury Multi-scale characterization compact reservoir pore throat characteristic |
| 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 |
| CN108268712A (en) * | 2018-01-05 | 2018-07-10 | 中国石油大学(北京) | The method and apparatus that nuclear magnetic resonance determines pore media capillary pressure |
| CN111693425A (en) * | 2019-03-14 | 2020-09-22 | 中国石油大学(北京) | Rock core film bound water saturation determination method based on mercury intrusion curve |
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