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Method for recognizing superior shale gas reservoir by adopting conventional logging information

A technology for conventional logging data and shale reservoirs, which is used in earth-moving drilling, wellbore/well components, etc. to achieve good interpretation and obvious logging curve characteristics.

Inactive Publication Date: 2016-08-03
CHENGDU CHUANGYUAN OIL & GAS TECH DEV
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  • Abstract
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing exploration technology has entered the bottleneck period for the exploration of structural conventional oil and gas reservoirs. The purpose of the present invention is to provide a method for identifying high-quality shale gas reservoirs using conventional well logging data to solve the current problem. There are problems in the exploration of shale gas reservoirs in the technology, and the use of conventional logging data to explore high-quality source rocks with mature fractures and high organic matter and silicon content

Method used

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Examples

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Embodiment

[0028] Taking two shale gas wells in Area A as an example, firstly, the conventional logging data of shale gas wells were preprocessed, and the shale gas reservoirs were processed, and compared with the results of core test analysis, this method is beneficial to the analysis of shale reservoirs. identification and evaluation. A method for identifying high-quality shale gas reservoirs using conventional logging data, comprising the following steps,

[0029] Step a, analyzing the shale mineral composition;

[0030] Step b, qualitatively identifying shale gas reservoirs;

[0031] Step c, quantitatively evaluating shale gas reservoirs;

[0032] Step d, comprehensively evaluating the shale gas reservoir.

[0033] In step a, whole-rock X-ray powder diffraction analysis is used to obtain the shale mineral composition, and the brittleness parameters are determined according to the mineral composition.

[0034] Shale reservoirs have a complex mineral composition, mainly including a...

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Abstract

The invention discloses a method for recognizing superior shale gas reservoir by adopting conventional logging information. The method comprises the following steps: a, analyzing shale mineral composition; b, qualitatively recognizing the shale gas reservoir; c, quantitatively evaluating the shale gas reservoir; d, comprehensively evaluating the shale gas reservoir. According to the method, the shale gas reservoir is recognized by using a conventional logging curve, and a logging curve combination feature suitable for destination shale gas reservoir is summarized by comprehending mineral rock composition, clay type and deposition environment and analyzing common and personal corresponding features of the logging curve.

Description

technical field [0001] The invention relates to the technical field of shale gas development, in particular to a method for identifying high-quality shale gas reservoirs by using conventional logging data. Background technique [0002] With the further deepening of oil and gas field exploration, the exploration difficulty is also increasing while the exploration technology is becoming more and more mature. As far as my country is concerned, oil and gas resources are relatively scarce, and the exploration of structural conventional oil and gas reservoirs has basically entered a "bottleneck" period, and a major breakthrough in oil and gas resources is to be achieved. Must rely on the exploration of unconventional oil and gas fields. In the United States and Canada, industrial oil flows have formed in several blocks. Shale gas is natural gas extracted from shale formations and stored in shale fractures. At present, logging technology is an important means to evaluate shale r...

Claims

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Application Information

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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 金涛刘欢杨波
Owner CHENGDU CHUANGYUAN OIL & GAS TECH DEV
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