Method for evaluating shale gas reservoir quality measuring logging wells
A technology of reservoir quality and evaluation method, which is applied in the field of shale gas reservoir quality logging and evaluation, can solve the problems of not meeting the requirements of logging and shale gas reservoir quality evaluation, complicated classification methods, and lack of classification boundaries , to achieve the effect of good promotion and application value
Active Publication Date: 2017-09-08
中石化石油工程技术服务有限公司 +1
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[0003] At present, the methods and standards for evaluating the quality of shale gas reservoirs rely extensively on various index parameters obtained from various testing methods and laboratory analysis, involving a large n
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[0029] refer to figure 1 , the method of the present invention is, concrete steps are as follows:
[0030] 1) Obtain the logging data of shale gas reservoirs in wells to be evaluated in the work area, including well logging and logging shale gas reservoir interpretation intervals, lithology, total hydrocarbon content in gas logging, methane content, shale gas reservoir The total porosity POR of reservoirs and the total organic carbon TOC of shale gas reservoirs.
[0031] Total hydrocarbon content, methane content, total porosity POR of shale gas reservoir, and total organic carbon TOC of shale gas reservoir measured by gas; the measurement units of POR and TOC are both %.
[0032] 2) Determine the shale gas reservoir section of the well to be evaluated
[0033] (1) When the division of well logging and logging reservoir intervals is consistent, the logging interpretation interval is directly selected as the shale gas reservoir interval. The shale total porosity POR of the w...
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The invention relates to a method for evaluating shale gas reservoir quality measuring logging wells. The method comprises following steps: obtaining measuring logging well information of shale in a well to be evaluated in a work area; determining the shale layer segment of the well to be evaluated; establishing a shale gas reservoir quality evaluation standard according to measuring logging well information of real drilling wells in the work area; using the total organic carbon content TOC of shale as an X axis and the total porosity POR of shale as a Y axis to form a TOC-POC evaluation plate; on the evaluation plate, marking the classes of shale gas reservoir quality with different symbols; drawing a determined work area quality classification standard on the evaluation plate; setting points of the shale total porosity POR and total organic carbon content TOC of the shale gas reservoir layer segment of the well to be evaluated on the evaluation plate; determining the reservoir quality class corresponding to the shale gas reservoir layer segment of the well to be evaluated according to the area where the data points are located; outputting evaluation results. The method of the invention is simple and has already been applied in Fuling shale gas field and Yichang area; as a result, the method satisfies the requirement of evaluation and engineering service.
Description
technical field [0001] The invention relates to the field of evaluation of unconventional oil and gas reservoirs, in particular to a method for evaluating mud logging quality of shale gas reservoirs. Background technique [0002] The development of shale gas is a world-class technical problem. The evaluation of shale gas reservoirs, especially the quality evaluation of shale gas reservoirs, is currently a hot topic of research by scholars at home and abroad. In the process of shale gas exploration and development, more and more production practices have shown that the quality of shale gas reservoirs is the most direct key factor determining the production capacity of shale gas. Shale reservoir quality evaluation is an important part of shale gas investment and development, which will directly determine the development benefits. [0003] At present, the methods and standards for evaluating the quality of shale gas reservoirs rely extensively on various index parameters obtai...
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Login to View More IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 张建平廖勇魏炜石文睿叶应贵冯爱国王兴志石元会赵红燕徐敬友季运景李光华
Owner 中石化石油工程技术服务有限公司