CN104047600B - A kind of oil-gas Layer logging explanation method - Google Patents
A kind of oil-gas Layer logging explanation method Download PDFInfo
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- CN104047600B CN104047600B CN201410330155.1A CN201410330155A CN104047600B CN 104047600 B CN104047600 B CN 104047600B CN 201410330155 A CN201410330155 A CN 201410330155A CN 104047600 B CN104047600 B CN 104047600B
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Abstract
<b> the invention belongs to hydrocarbon zone interpretation assessment technique field, discloses a kind of oil-gas Layer logging explanation method.Its technical characteristics is: according to " three high and one low " feature identification Reservoirs and the conventional gas and oil layer of gas survey hydrocarbon component, oil bearing grade in kind, rock pyrolysis chromatogram; Reservoir fluid deflection oil phase or gas phase is judged according to rock pyrolysis chromatographic curve form; The evaluation criterion set up according to Oil-gas Accumulation Types or plate sentence knowledge to properties of fluid in bearing stratum.Present invention efficiently solves different origins oil-gas Layer to coexist the difficult problem of accurate evaluation, improve the logging explanation accuracy rate of oily water-gas relation complicated reservoirs, apply with being conducive to mud logging techniques, be also conducive to reducing formation testing and select layer difficulty, improve operation efficiency.</b>
Description
Technical field
The invention belongs to hydrocarbon zone interpretation assessment technique field, particularly relate to a kind of gas-bearing formation logging explanation method.
Background technology
At present, the evaluation of well logging hydrocarbon zone interpretation generally adopts the application of the multi-parameter comprehensive such as gas survey, sieve residue log, analytical test, and the method that blockette layering position is set up evaluation model or evaluated plate is carried out properties of fluid in bearing stratum and sentenced knowledge.The method effectively prevent the defect of single item evaluation technology, substantially increases the accuracy of well logging hydrocarbon zone interpretation, and particularly in the discrimination and evaluation of low resistivity hydrocarbon layers, fractured oil and gas layer, shale gas-bearing formation, other means are irreplaceable.
This blockette layering position is set up evaluation model or evaluates the method for plate not good by effect in the reservoir exploration and development transformed after primary reservoir or Migration, but exist within the degree of depth two km show in destroyed Reservoirs evaluation procedure again after biodegradation etc. becomes to hide many inadaptable.Such Reservoirs and conventional gas and oil layer are also deposited, and log data shows as " three high nothings " feature, i.e. high total hydrocarbon display, high C
1content, high oil bearing grade in kind, rock pyrolysis chromatogram are just being purchased alkane peak and are being disappeared, and gas is surveyed display and matched with rock pyrolysis chromatogram spectrogram feature and dry gas or moisture feature, but oil bearing grade in kind is similar to the oil reservoir of traditional understanding again.Its formation testing result has net pay zone, oil-water common-layer, oil-containing water layer, also has the same layer of pure gas-bearing formation, air water, gassiness water layer, and application conventional gas and oil layer means of interpretation is evaluated, and accuracy rate is low, have impact on the effect of logging explanation assessment technique.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of explanation evaluating method being suitable for the complex hydrocarbon water relation reservoir that middle-shallow layer Reservoirs and conventional gas and oil layer coexist, improve logging explanation coincidence rate, widen the scope of application of mud logging techniques, for formation testing selects layer to provide reliable support.
For solving the problems of the technologies described above, the technical solution used in the present invention comprises the following steps:
The first step is according to the log data such as gas detection logging, conventional logging determination oil and gas anomaly layer;
Second step belongs to Reservoirs or conventional gas and oil layer according to the gas survey hydrocarbon component of interpretation layer, oil bearing grade in kind, rock pyrolysis chromatogram data indicating characteristic identification interpretation layer;
According to rock pyrolysis chromatographic curve form, 3rd step, for the interpretation layer belonging to Reservoirs, further judges that reservoir fluid is inclined oil phase or inclined gas phase; The further criteria for interpretation according to oil phase or gas phase is evaluated interpretation layer;
4th step adopts the conventional methods such as region plate to evaluate for conventional gas and oil layer.
A kind of oil-gas Layer logging explanation method provided by the present invention, efficiently solve different origins oil-gas Layer adopt same means of interpretation evaluate existing for deficiency, improve the logging explanation accuracy rate of oily water-gas relation complicated reservoirs, apply with being conducive to mud logging techniques, also be conducive to reducing formation testing and select layer difficulty, improve operation efficiency.
Accompanying drawing explanation
Fig. 1 is that in a kind of gas-bearing formation logging explanation of the present invention method, interpretation layer is Reservoirs and conventional oil reservoir logging parameters indicatrix schematic diagram.
Detailed description of the invention
Be described in further details below in conjunction with the operating principle of accompanying drawing to a kind of oil-gas Layer logging explanation of the present invention method.
As shown in Figure 1,, sieve residue log active according to gas survey display is shown in that oil stain, oil mark show, sidewall coring is shown in the log data indicating characteristic such as oil mark, oil immersion display, the contrast district interpretation layer criteria for classifying, well section 1415-1485m identifies the first interpretation layer 1, second interpretation layer 2, the 3rd interpretation layer 3 totally 3 interpretation layer.
Reservoirs or conventional gas and oil layer is belonged to according to total hydrocarbon in gas logging show value, hydrocarbon component characteristics, landwaste, sidewall coring oil bearing grade, rock pyrolysis chromatogram data indicating characteristic identification interpretation layer.
First total hydrocarbon show value 4 of the first interpretation layer 1 reaches 37.08%; The rarely seen C of hydrocarbon component 7,10,13
1with micro-C
2, C
1percentage contents is up to more than 99%; Sieve residue log 27 is oil mark packsand; Sidewall coring 20,21 is oil immersion packsand; Sidewall coring rock pyrolysis chromatogram spectrogram 16 spectrum curve is straight, and n-alkane peak disappears, and the first interpretation layer 1 data demonstrates " three high nothings " feature, belongs to Reservoirs.
Second total hydrocarbon show value 5 of the second interpretation layer 2 reaches 36.76%; The rarely seen C of hydrocarbon component 8,11,14
1with a small amount of C
2, C
1percentage contents is up to more than 99%; Sieve residue log 28 is oil mark packsand; Sidewall coring 22,23 is oil immersion packsand; Sidewall coring rock pyrolysis chromatogram spectrogram 17 n-alkane peak disappears, and spectrum curve latter half swells, and occur can not differentiating thing in a large number, the second interpretation layer 2 data is shown as " three high nothings " feature equally, belongs to Reservoirs.
The total hydrocarbon show value 6 of the 3rd interpretation layer 3 reaches 37.15%; Gas surveys the C of hydrocarbon component 9,12,15
1-C
5complete, C
1percentage contents is 75.68%; Sieve residue log 29 is oil stain packsand; Sidewall coring 24,25,26 is oil mark, oil immersion packsand; Sidewall coring rock pyrolysis chromatogram spectrogram 18 n-alkane peak is complete, in pectination normal distribution, belongs to conventional gas and oil layer.
Judge that reservoir fluid is inclined oil phase or inclined gas phase according to rock pyrolysis chromatographic curve form.First interpretation layer 1 sidewall coring rock pyrolysis Chromatogram Baseline is straight, the inclined gas phase of reservoir fluid; Second interpretation layer 2 sidewall coring rock pyrolysis Chromatogram Baseline protuberance, occurs can not differentiating thing in a large number, the inclined oil phase of reservoir fluid; 3rd interpretation layer 3 sidewall coring rock pyrolysis chromatogram n-alkane peak is complete, the inclined oil phase of reservoir fluid.
The regional evaluation standard of foundation Reservoirs is in conjunction with the comparative analysis of offset well formation testing layer, and the first interpretation layer 1 is evaluated as gas-bearing formation, and the second interpretation layer 2 is evaluated as oil reservoir; Regional evaluation plate the 3rd interpretation layer 3 according to conventional gas and oil layer is evaluated as oil reservoir.
A kind of oil-gas Layer logging explanation method provided by the present invention, is not limited only to above-mentioned example, as long as implementation process is identical with the present invention, all falls into scope.
Claims (1)
1. an oil-gas Layer logging explanation method, is characterized in that the method comprises the following steps:
The first step divides interpretation layer according to log data;
Second step belongs to Reservoirs or conventional gas and oil layer according to the gas survey hydrocarbon component of interpretation layer, oil bearing grade in kind, rock pyrolysis chromatogram data indicating characteristic identification interpretation layer;
According to rock pyrolysis chromatographic curve form, 3rd step, for the interpretation layer belonging to Reservoirs, further judges that reservoir fluid is inclined oil phase or inclined gas phase; The further criteria for interpretation according to oil phase or gas phase is evaluated interpretation layer;
4th step adopts region plate conventional method to evaluate for conventional gas and oil layer.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105525917B (en) * | 2014-09-28 | 2019-03-29 | 中国石油化工股份有限公司 | The method for identifying fluid type in the method and identification reservoir of reservoir |
| CN104989391B (en) * | 2015-06-12 | 2017-08-01 | 中国石油集团渤海钻探工程有限公司 | Oil-gas Layer logging explanation evaluating method is carried out using methane content figure in layer |
| EP3329272A1 (en) * | 2015-07-27 | 2018-06-06 | Oil India Limited | Method to determine transformation of kerogen to oil/gas at different maturities using step-wise pyrolysis-gas chromatography |
| CN105134198B (en) * | 2015-09-10 | 2017-11-14 | 中国石油集团渤海钻探工程有限公司 | Formation fluid separates assay method |
| CN106401579B (en) * | 2016-11-04 | 2020-01-17 | 上海神开石油科技有限公司 | Oil-gas-water identification method and system based on while-drilling multi-parameter analysis |
| CN106555587B (en) * | 2016-11-24 | 2019-06-21 | 中国石油集团渤海钻探工程有限公司 | A kind of gas survey the hydrocarbon component longitudinal direction difference grease recognition methods |
| CN107060748A (en) * | 2017-06-08 | 2017-08-18 | 中国石油集团渤海钻探工程有限公司 | A kind of oil-gas-water layer well logging starry sky explanation evaluating method |
| CN111677491B (en) * | 2018-12-28 | 2023-10-20 | 中石化石油工程技术服务有限公司 | Development well test production horizon logging layer selection evaluation method |
| CN110107285A (en) * | 2019-05-06 | 2019-08-09 | 中国石油集团渤海钻探工程有限公司 | The method of the petrogenesis attribute on stratum is quickly judged according to the element composition that landwaste is returned out in shaft bottom |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5866814A (en) * | 1997-09-30 | 1999-02-02 | Saudi Arabian Oil Company | Pyrolytic oil-productivity index method for characterizing reservoir rock |
| CN102312671B (en) * | 2011-09-16 | 2014-02-12 | 中国石油化工股份有限公司 | Method capable of fast explaining and evaluating reservoir fluid properties |
| CN102518428A (en) * | 2011-11-11 | 2012-06-27 | 中国石油天然气股份有限公司 | Oily water layer recognition method and device |
| CN103510946B (en) * | 2012-06-19 | 2017-05-03 | 中国石油集团长城钻探工程有限公司 | Method for evaluating reservoir fluid property through gas logging data |
| CN103630669B (en) * | 2013-12-16 | 2016-03-30 | 中国石油天然气股份有限公司 | Unconventional densification and shale reservoir oil bearing evaluation experimental technique |
| CN103615243B (en) * | 2013-12-17 | 2016-05-11 | 中国海洋石油总公司 | A kind of method of changing derivative parameter plate with utilizing and judging oily type |
| CN103615242B (en) * | 2013-12-17 | 2016-08-31 | 中国海洋石油总公司 | Layer fluid well logging multi-parameter oil-gas layer comprehensive interpretation and evaluation method in real time |
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