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Method for calculating content of shale brittle minerals through detritus element analysis data

A brittle mineral and element analysis technology, applied in computing, electrical digital data processing, special data processing applications, etc., can solve the problems of no brittle mineral calculation method, no interpretation method while drilling, low level of shale gas research, etc. To achieve the effect of easy operation, low cost and simple operation

Inactive Publication Date: 2015-05-13
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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Problems solved by technology

[0003] However, due to the particularity of shale gas reservoirs, in addition to the comprehensive logging parameters, there is only one logging-while-drilling parameter, gamma, among the parameters while drilling, and there are few parameters while drilling.
Moreover, the current level of shale gas research in China is relatively low, and there is no effective interpretation method while drilling. Therefore, the current interpretation while drilling has the following problems:
[0004] 1. The current evaluation of shale gas reservoirs is mainly based on laboratory analysis and test data, which cannot meet the requirements of interpretation while drilling
[0005] 2. The content of brittle minerals is an important parameter for the evaluation of shale reservoirs. At present, there is no effective calculation method for brittle minerals

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  • Method for calculating content of shale brittle minerals through detritus element analysis data

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Embodiment approach

[0028] As the best implementation mode of the present invention, it comprises the following steps:

[0029] a. Integrate the drilled shale core, cuttings mineral analysis data and cuttings elemental analysis data in the same block;

[0030] b. Carry out correlation analysis between the brittle mineral content in the regional shale core and cuttings mineral analysis data and cuttings element analysis data, and establish a multivariate interpretation model;

[0031] c. According to the established multivariate interpretation model, the shale brittle mineral content is calculated while drilling.

[0032] In the step a, the shale core and cuttings mineral analysis data are the core and cuttings mineral content data analyzed experimentally.

[0033] In the step b, the brittle mineral content is the sum of all kinds of brittle mineral content in the core and cuttings mineral analysis data, mainly quartz and feldspar, followed by calcite. The calculation formula of the brittle miner...

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Abstract

The invention discloses a method for calculating the content of shale brittle minerals through detritus element analysis data, and relates to the field of petroleum and gas exploration and development. On the basis of the content of the bristle minerals in shale core and detritus mineral analysis data and the detritus element analysis data, a multi-element interpretation model is established through correlation analysis, and the content of the shale brittle minerals is calculated while drilling according to the multi-element interpretation model. According to the drilled shale core and detritus mineral analysis data and the detritus element analysis data, the method for calculating the content of the shale brittle minerals is established in the multi-element fitting mode, the content of the shale brittle minerals is calculated while drilling, and the problem that a method for interpreting the content of the shale stratum brittle minerals while drilling has defects is solved.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas exploration and development, in particular to a method for calculating shale brittle mineral content by using cuttings elemental analysis data. Background technique [0002] Shale gas is natural gas stored in shale in free and adsorbed states. It is gradually becoming a hot spot in oil and gas exploration. Domestic shale gas horizontal well development is about to be carried out on a large scale. For the interpretation method of shale gas while drilling, for example, the study on the logging response characteristics and identification methods of shale gas reservoirs disclosed in the 18th issue of "Science and Technology Herald" in 2012. [0003] However, due to the particularity of shale gas reservoirs, in addition to the comprehensive logging parameters, there is only one logging-while-drilling parameter of gamma while drilling, and there are few parameters while drilling. Moreover, the ...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 唐谢唐家琼张梦琳崔健曹玉李旭吴家杰
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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