CN104047600A - Well log interpretation method for hydrocarbon reservoir - Google Patents
Well log interpretation method for hydrocarbon reservoir Download PDFInfo
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Abstract
The invention belongs to the technical field of interpretation and evaluation of hydrocarbon reservoirs, and discloses a well log interpretation method for a hydrocarbon reservoir. The well log interpretation method for the hydrocarbon reservoir is technically characterized in that a special hydrocarbon reservoir and a normal hydrocarbon reservoir are recognized according to the 'three high and one low' characteristics of gas logging hydrocarbon components, physical oil grades and rock pyrolysis chromatography, whether reservoir fluid trends to be an oil phase or a gas phase according to a rock pyrolysis chromatography tracing pattern is judged, and evaluation criterions or board charts are established according to oil and gas reservoir types to judge the properties of the reservoir fluid. The well log interpretation method for the hydrocarbon reservoir effectively achieves accurate evaluation of coexisted hydrocarbon reservoirs of different contributing factors, and improves the well log interpretation accuracy rate of the reservoir with a complex relation of oil, gas and water, the application and popularization of the well log technology are facilitated, difficulty of formation testing and reservoir selection is lowered, and efficiency for production is improved.
Description
Technical field
the invention belongs to hydrocarbon zone interpretation assessment technique field, relate in particular 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 has effectively been avoided the defect of individual event assessment technique, has greatly improved 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 in the reservoir exploration and development that the method for plate do not transformed after primary reservoir or Migration effect good, but with interior, in more destroyed Reservoirs evaluation procedure shows many be not suitable with after existing one-tenth such as biodegradation to hide at the degree of depth two kms.Such Reservoirs and conventional gas and oil layer are also deposited, and show as " three high nothings " feature, i.e. high total hydrocarbon demonstration, high C on log data
1
content, high oil bearing grade in kind, rock pyrolysis chromatogram are just being purchased alkane peak and are being disappeared, and gas survey demonstration and rock pyrolysis chromatogram spectrogram feature and dry gas or moisture feature match, 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 pure gas-bearing formation, air water with layer, gassiness water layer, and application conventional gas and oil layer means of interpretation evaluated, and accuracy rate is low, has affected 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 that complex hydrocarbon water that middle-shallow layer Reservoirs and conventional gas and oil layer coexist is related to reservoir that is suitable for, improve logging explanation coincidence rate, widen the scope of application of mud logging techniques, for formation testing choosing layer provides 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 determined oil and gas anomaly layer according to log datas such as gas detection logging, conventional loggings;
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;
the 3rd step, for the interpretation layer that belongs to Reservoirs, is further inclined to one side oil phase or inclined to one side gas phase according to rock pyrolysis chromatographic curve form judgement reservoir fluid; Further according to the criteria for interpretation of oil phase or gas phase, interpretation layer is evaluated;
the 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, effectively having solved different origins oil-gas Layer adopts same means of interpretation to evaluate existing deficiency, improved the logging explanation accuracy rate that oil gas water is related to complicated reservoirs, being conducive to mud logging techniques applies, also be conducive to reduce formation testing choosing 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.
The specific embodiment
below in conjunction with accompanying drawing, the operating principle of a kind of oil-gas Layer logging explanation of the present invention method is described in further details.
as shown in Figure 1,, sieve residue log active according to gas survey demonstration is shown in that oil stain, oil mark show, sidewall coring is shown in the log data indicating characteristics such as oil mark, oil immersion demonstration, the contrast district interpretation layer criteria for classifying, well section 1415-1485m identifies the first interpretation layer 1, the second interpretation layer 2, the 3rd interpretation layer 3 totally 3 interpretation layer.
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, belong to Reservoirs or conventional gas and oil layer.
the first total hydrocarbon show value 4 of the first interpretation layer 1 reaches 37.08%; Hydrocarbon component 7,10,13 rarely seen C
1
with micro-C
2
, C
1
percentage composition is up to more than 99% relatively; Sieve residue log 27 is oil mark packsand; Sidewall coring 20,21 is oil immersion packsand; Sidewall coring rock pyrolysis chromatogram spectrogram 16 spectrum curves are straight, and n-alkane peak disappears, and the first interpretation layer 1 data demonstrates " three high nothings " feature, belongs to Reservoirs.
the second total hydrocarbon show value 5 of the second interpretation layer 2 reaches 36.76%; Hydrocarbon component 8,11,14 rarely seen C
1
with a small amount of C
2
, C
1
percentage composition is up to more than 99% relatively; 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 peaks disappear, and spectrum curve latter half protuberance occurs can not differentiating thing in a large number, and the second interpretation layer 2 data are shown as " three high nothings " feature equally, belong to Reservoirs.
the total hydrocarbon show value 6 of the 3rd interpretation layer 3 reaches 37.15%; Gas is surveyed the C of hydrocarbon component 9,12,15
1
-C
5
complete, C
1
percentage composition is 75.68% relatively; 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 peaks are complete, are pectination normal distribution, belong to conventional gas and oil layer.
according to rock pyrolysis chromatographic curve form judgement reservoir fluid, be inclined to one side oil phase or inclined to one side gas phase.The first interpretation layer 1 sidewall coring rock pyrolysis Chromatogram Baseline is straight, the inclined to one side gas phase of reservoir fluid; The second interpretation layer 2 sidewall coring rock pyrolysis Chromatogram Baseline protuberances, occur can not differentiating thing in a large number, the inclined to one side oil phase of reservoir fluid; The 3rd interpretation layer 3 sidewall coring rock pyrolysis chromatogram n-alkane peaks are complete, the inclined to one side oil phase of reservoir fluid.
according to the regional evaluation standard of Reservoirs, in conjunction with the comparative analysis of offset well formation testing layer, 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, so long as implementation process is identical with the present invention, all falls into protection domain of the present invention.
Claims (1)
1. an oil-gas Layer logging explanation method, is characterized in that the method comprises the following steps:
The first step is divided 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;
The 3rd step, for the interpretation layer that belongs to Reservoirs, is further inclined to one side oil phase or inclined to one side gas phase according to rock pyrolysis chromatographic curve form judgement reservoir fluid; Further according to the criteria for interpretation of oil phase or gas phase, interpretation layer is evaluated;
The 4th step adopts the conventional methods such as region plate to evaluate for conventional gas and oil layer.
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Cited By (9)
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| CN104989391A (en) * | 2015-06-12 | 2015-10-21 | 中国石油集团渤海钻探工程有限公司 | Method for logging interpretation and evaluation of hydrocarbon reservoir through inside-stratum methane content graph |
| CN105134198A (en) * | 2015-09-10 | 2015-12-09 | 中国石油集团渤海钻探工程有限公司 | Formation fluid separation analysis and evaluation method |
| CN105525917A (en) * | 2014-09-28 | 2016-04-27 | 中国石油化工股份有限公司 | Method for identifying reservoir and method for identifying fluid type in reservoir |
| CN106401579A (en) * | 2016-11-04 | 2017-02-15 | 上海神开石油科技有限公司 | While-drilling multi-parameter analysis-based oil-gas-water identification method and system |
| CN106555587A (en) * | 2016-11-24 | 2017-04-05 | 中国石油集团渤海钻探工程有限公司 | A kind of gas surveys the difference profit recognition methods of hydrocarbon component longitudinal direction |
| 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 |
| CN107923890A (en) * | 2015-07-27 | 2018-04-17 | 石油印度有限公司 | Using progressively pyrolysis gas chromatography measure different curing degrees kerogen to the conversion ratio of oil/gas 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 |
| CN111677491A (en) * | 2018-12-28 | 2020-09-18 | 中石化石油工程技术服务有限公司 | Method for selecting and evaluating logging horizon of pilot production horizon of development well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105525917A (en) * | 2014-09-28 | 2016-04-27 | 中国石油化工股份有限公司 | Method for identifying reservoir and method for identifying fluid type in 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 |
| CN104989391A (en) * | 2015-06-12 | 2015-10-21 | 中国石油集团渤海钻探工程有限公司 | Method for logging interpretation and evaluation of hydrocarbon reservoir through inside-stratum methane content graph |
| CN107923890A (en) * | 2015-07-27 | 2018-04-17 | 石油印度有限公司 | Using progressively pyrolysis gas chromatography measure different curing degrees kerogen to the conversion ratio of oil/gas method |
| CN105134198A (en) * | 2015-09-10 | 2015-12-09 | 中国石油集团渤海钻探工程有限公司 | Formation fluid separation analysis and evaluation 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 |
| CN106401579A (en) * | 2016-11-04 | 2017-02-15 | 上海神开石油科技有限公司 | While-drilling multi-parameter analysis-based oil-gas-water identification method and system |
| CN106555587A (en) * | 2016-11-24 | 2017-04-05 | 中国石油集团渤海钻探工程有限公司 | A kind of gas surveys the difference profit recognition methods of hydrocarbon component longitudinal direction |
| 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 |
| CN111677491A (en) * | 2018-12-28 | 2020-09-18 | 中石化石油工程技术服务有限公司 | Method for selecting and evaluating logging horizon of pilot production horizon of development well |
| 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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