Shale gas geological sweet spot prediction method

A prediction method and geological technology, applied in seismic signal processing, seismology for logging records, etc., can solve the problem that the correlation of shale gas geological sweet spots is not very good and cannot well reflect the lateral direction of shale gas geological sweet spots The law of distribution and change, the inability to study the horizontal continuous change of shale gas geological sweet spots, etc., achieve the effect of high resolution and large lateral density

Inactive Publication Date: 2017-02-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The disadvantage is that it cannot study the lateral continuous changes of shale gas geological sweet spots
However, because the correlation between attributes and shale gas geological sweet spots is sometimes not very good, the prediction results cannot well reflect the lateral distribution and change of shale gas geological sweet spots

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  • Shale gas geological sweet spot prediction method

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[0031] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so that implementers of the present invention can fully understand how the present invention uses technical means to solve technical problems, and achieve the realization process of technical effects and according to the above-mentioned realization process The present invention is implemented concretely. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0032] The following is based on the attached figure 1 The flow chart in will describe the implementation process of the method of the present invention in detail. The steps shown in the flowcharts of the figures can be performed in a computer system comprising, for examp...

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Abstract

The invention provides a shale gas geological sweet spot prediction method comprising the following successive steps: step one, a synthetic seismogram is acquired based on an organic carbon content logging curve; step two, well-to-seismic correlation is performed on the synthetic seismogram and the actual seismic data, and the actual seismic data are constrained by the synthetic seismogram to perform inversion so as to acquire inversion data volume; and step three, geological sweet spot prediction is performed according to the inversion data volume obtained in the step two. The method has the advantages of instrument measurement, acquisition of detailed information of organic matter abundance of shale gas in the well and high resolution and utilizes the advantage of large transverse density of the seismic data prediction technology so that the high-resolution inversion result can be obtained under the condition of a small amount of drilling in the early exploration or a lot of drilling in the development phase.

Description

technical field [0001] The invention relates to the field of petroleum exploration and development, especially the field of shale gas exploration and development, and in particular to a method for predicting geological sweet spot of shale gas. Background technique [0002] The shale gas sweet spot refers to the best area or horizon for shale gas exploration and development. Its typical characteristics are: thick shale, in the "gas window", high content of organic matter, high content of brittle minerals such as quartz (strong compressibility), adjacent to conventional oil and gas reservoirs, good surface conditions, etc. When developing shale gas reservoirs, the detection of geological sweet spots is the basis for optimizing the core area of ​​shale gas development. [0003] At present, the methods for predicting shale gas geological sweet spots mainly measure and predict shale gas geological sweet spots through in-hole measurement of instruments and seismic multi-attribute...

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Application Information

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IPC IPC(8): G01V1/28G01V1/40
Inventor 夏一军胡向阳
Owner CHINA PETROLEUM & CHEM CORP
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