CN104533399A - Method for calculating organic carbon content of stratum while drilling - Google Patents
Method for calculating organic carbon content of stratum while drilling Download PDFInfo
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- CN104533399A CN104533399A CN201410643686.6A CN201410643686A CN104533399A CN 104533399 A CN104533399 A CN 104533399A CN 201410643686 A CN201410643686 A CN 201410643686A CN 104533399 A CN104533399 A CN 104533399A
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- China
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- carbon content
- organic carbon
- stratum
- data
- landwaste
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention discloses a method for calculating organic carbon content of a stratum while drilling. The method for calculating the organic carbon content of the stratum while drilling is based on cutting gamma-ray spectra uranium analysis data and cutting experiment analysis organic carbon content data, an interpretation model is built according to the correlation there-between, and the organic carbon content of the stratum is calculated according to the interpretation model while drilling. The method for calculating the organic carbon content of the stratum while drilling realizes to calculate the organic carbon content of the stratum while drilling and solves the problem that the organic carbon content of the stratum calculated through gamma-ray calculation while drilling is imprecise.
Description
Technical field
The present invention relates to a kind of landwaste gamma spectra uranium that utilizes and analyze data with boring the method calculating stratum organic carbon content, belong to petroleum natural gas exploration technical field.
Background technology
Shale gas is stored in the natural gas that free state and ADSORPTION STATE exist in shale, and become the focus of oil-gas exploration just gradually, domestic shale gas horizontal well development is carried out by large area.For shale gas interpretation while drilling method, such as, 18 phases in 2012 " scientific and technological Leader " disclosed shale gas reservoir logging response character and recognition methods research.
But because current domestic shale gas research level is lower, the evaluation for shale reservoir major parameter-organic carbon content is not accurate enough, mainly there is following problem: 1, for the evaluation of shale formation organic carbon content, at present mainly based on experimental analysis.But analytical test data is delayed in horizontal well drilling process, be difficult to carry out effectively evaluating with brill.2, due to the particularity of shale gas horizontal well development, with in brill parameter except logging parameters, only have with brill gamma this well logging during parameter.And find, with correlation between brill gamma and organic carbon content, there is uncertainty according to statistical analysis, be difficult to calculate accurately it.3, data analysis finds, has good correlation between uranium content and organic carbon content, but shale gas horizontal well is conventional with not having uranium content analysis data in brill parameter.
Summary of the invention
The object of the invention is to the problems referred to above overcoming prior art existence, providing a kind of with boring the method calculating stratum organic carbon content.Present invention achieves calculating with brill of stratum organic carbon content, solve and utilize with the inaccurate problem of brill gamma calculating stratum organic carbon content.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of with boring the method calculating stratum organic carbon content, it is characterized in that: analyze based on data and rock core, landwaste experimental analysis organic carbon content data by landwaste gamma spectra uranium, according to the correlation of the two, set up interpretation model, calculate stratum organic carbon content according to interpretation model with brill.
Described method specifically comprises the steps:
The landwaste gamma spectra uranium of drilling well in a, comprehensive same block analyzes data and rock core, landwaste experimental analysis organic carbon content data;
B, by correlation analysis to data, set up interpretation model;
C, according to the interpretation model set up, calculate stratum organic carbon content with brill.
In described step b, the interpretation model of foundation is as follows:
formula 1.
In described step b, utilize the landwaste gamma spectra uranium of same depth analysis data and rock core, landwaste experimental analysis organic carbon content data to carry out correlation analysis, set up interpretation model.
Employing the invention has the advantages that:
One, the present invention analyzes based on data and rock core, landwaste experimental analysis organic carbon content data by landwaste gamma spectra uranium, according to the correlation of the two, set up effective interpretation model, achieve calculating with brill of stratum organic carbon content, solve and utilize with the inaccurate problem of brill gamma calculating stratum organic carbon content
Two, the invention belongs to the innovation of log data application process, under the condition of current shale formation organic carbon content computational methods shortcoming, landwaste gamma spectra uranium is utilized to analyze data, by setting up the correlation model of itself and rock core, landwaste experimental analysis organic carbon content data, realize calculating with brill of shale formation organic carbon content.
Three, the present invention enriches constantly at current logging data and proposes under accurate background, utilizes new logging parameters---and landwaste gamma spectra uranium analyzes data, achieves the creative utilization of well logging new argument.
Four, the present invention proposes under current natural gamma calculates the not accurate enough condition of organic carbon content, utilizes landwaste gamma spectra uranium to analyze data, can calculate by formation organic carbon content more accurately.
Five, the present invention has real-time, to analyze based on data with brill landwaste gamma spectra uranium, therefore can catch up with drill bit completely, realize calculating with the organic carbon content bored.
Six, adopt low cost of the present invention, the present invention is without the need to the extra charge of any experimental analysis; Easy to operate, once set up corresponding correlation model, can be made an explanation by correlation model, simple to operate.
Seven, the present invention extensively can be adapted to the calculating of shale formation organic carbon content, can obtain better effect.
Accompanying drawing explanation
Fig. 1 is that the present invention analyzes data and rock core, landwaste experimental analysis organic carbon content data dependence graph at the landwaste gamma spectra uranium of certain block.
Detailed description of the invention
A kind of with boring the method calculating stratum organic carbon content, comprise: analyze based on data and rock core, landwaste experimental analysis organic carbon content data by landwaste gamma spectra uranium, according to the correlation of the two, set up interpretation model, calculate stratum organic carbon content according to interpretation model with brill.
Described method specifically comprises the steps:
The landwaste gamma spectra uranium of drilling well in a, comprehensive same block analyzes data and rock core, landwaste experimental analysis organic carbon content data;
B, by correlation analysis to data, set up interpretation model;
C, according to the interpretation model set up, calculate stratum organic carbon content with brill.
In described step b, the interpretation model of foundation is as follows:
formula 1.
As shown in Figure 1, the landwaste gamma spectra uranium of same depth analysis data and rock core, landwaste experimental analysis organic carbon content data are utilized to carry out correlation analysis, the dependency relation formula of both foundation and interpretation model.Namely the landwaste experimental analysis organic carbon content drawn is stratum organic carbon content.
Claims (4)
1. one kind calculates the method for stratum organic carbon content with brill, it is characterized in that: analyze based on data and landwaste experimental analysis organic carbon content data by landwaste gamma spectra uranium, according to the correlation of the two, set up interpretation model, calculate stratum organic carbon content according to interpretation model with brill.
2. according to claim 1 with boring the method calculating stratum organic carbon content, it is characterized in that: described method specifically comprises the steps:
The landwaste gamma spectra uranium of drilling well in a, comprehensive same block analyzes data and landwaste experimental analysis organic carbon content data;
B, by correlation analysis to data, set up interpretation model;
C, according to the interpretation model set up, calculate stratum organic carbon content with brill.
3. according to claim 2 with boring the method calculating stratum organic carbon content, it is characterized in that: in described step b, the interpretation model of foundation is as follows:
formula 1.
4. according to claim 2 with boring the method calculating stratum organic carbon content, it is characterized in that: in described step b, utilize the landwaste gamma spectra uranium of same depth analysis data and rock core, landwaste experimental analysis organic carbon content data to carry out correlation analysis, set up interpretation model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410643686.6A CN104533399A (en) | 2014-11-14 | 2014-11-14 | Method for calculating organic carbon content of stratum while drilling |
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| CN201410643686.6A CN104533399A (en) | 2014-11-14 | 2014-11-14 | Method for calculating organic carbon content of stratum while drilling |
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| CN104533399A true CN104533399A (en) | 2015-04-22 |
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| CN201410643686.6A Pending CN104533399A (en) | 2014-11-14 | 2014-11-14 | Method for calculating organic carbon content of stratum while drilling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703561A (en) * | 2017-10-23 | 2018-02-16 | 中石化石油工程技术服务有限公司 | The logging method of organic carbon content is calculated in a kind of shale gas horizontal well |
| CN109063296A (en) * | 2018-07-23 | 2018-12-21 | 中国石油集团川庆钻探工程有限公司 | Shale air content is with brill calculation method |
| CN111022040A (en) * | 2019-11-29 | 2020-04-17 | 中国石油集团川庆钻探工程有限公司 | Method for calculating volume of organic compound in shale gas reservoir core |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2718396A1 (en) * | 1976-07-01 | 1978-01-12 | Texaco Development Corp | PROCEDURE FOR THE IN-SITU DETERMINATION OF THE BODY ROCK DEPOSIT POTENTIAL OF ROCK LAYERS |
| US20080179510A1 (en) * | 2006-06-29 | 2008-07-31 | Baker Hughes Incorporated | Use of Thorium-Uranium Ratio as an Indicator of Hydrocarbon Source Rock |
| CN103670388A (en) * | 2013-12-12 | 2014-03-26 | 中国石油天然气股份有限公司 | Method for evaluating organic carbon content of shale |
| CN103670383A (en) * | 2012-09-17 | 2014-03-26 | 中国石油天然气股份有限公司 | Method and device for identifying shale oil deposit effective reservoir |
| CN103792338A (en) * | 2014-01-28 | 2014-05-14 | 中国石油天然气股份有限公司 | Method and device for determining content of organic carbon in hydrocarbon source rock |
-
2014
- 2014-11-14 CN CN201410643686.6A patent/CN104533399A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2718396A1 (en) * | 1976-07-01 | 1978-01-12 | Texaco Development Corp | PROCEDURE FOR THE IN-SITU DETERMINATION OF THE BODY ROCK DEPOSIT POTENTIAL OF ROCK LAYERS |
| US20080179510A1 (en) * | 2006-06-29 | 2008-07-31 | Baker Hughes Incorporated | Use of Thorium-Uranium Ratio as an Indicator of Hydrocarbon Source Rock |
| CN103670383A (en) * | 2012-09-17 | 2014-03-26 | 中国石油天然气股份有限公司 | Method and device for identifying shale oil deposit effective reservoir |
| CN103670388A (en) * | 2013-12-12 | 2014-03-26 | 中国石油天然气股份有限公司 | Method for evaluating organic carbon content of shale |
| CN103792338A (en) * | 2014-01-28 | 2014-05-14 | 中国石油天然气股份有限公司 | Method and device for determining content of organic carbon in hydrocarbon source rock |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703561A (en) * | 2017-10-23 | 2018-02-16 | 中石化石油工程技术服务有限公司 | The logging method of organic carbon content is calculated in a kind of shale gas horizontal well |
| CN109063296A (en) * | 2018-07-23 | 2018-12-21 | 中国石油集团川庆钻探工程有限公司 | Shale air content is with brill calculation method |
| CN111022040A (en) * | 2019-11-29 | 2020-04-17 | 中国石油集团川庆钻探工程有限公司 | Method for calculating volume of organic compound in shale gas reservoir core |
| CN111022040B (en) * | 2019-11-29 | 2022-07-12 | 中国石油集团川庆钻探工程有限公司 | Method for calculating volume of organic compound in shale gas reservoir core |
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Application publication date: 20150422 |