Shale gas probability area selecting method

Abstract

The invention discloses a shale gas probability area selecting method. The method includes the following steps that continuous parameters and discrete parameters of shale gas selecting areas are determined; according to changes of the single parameters in an evaluation area, a planar information graph of a uniform proportional scale is generated; conditional probability valuing is performed according to geological implication, continuous parameter values under different conditional probabilities are obtained through a proportion occupying algorithm, and discrete parameter values corresponding to different conditional probabilities are obtained through normal distribution model integrals; single parameter values under the same conditional probability serve as a shale gas selecting area combination standard under the probability, the beneficial range under the conditional probability is delineated on the planar information graph of the single parameters, and the superposed area of the planar beneficial ranges of the single parameters is the shale gas probability area selecting result under the conditional probability. The method is high in operability and reliability and capable of reasonably implementing shale gas probability area selecting, and reliable and effective quantitative area selection is achieved.

Description

technical field [0001] The invention relates to a shale gas probability area selection method. Background technique [0002] Shale gas is the fastest-growing new resource in the energy field. In 2014, China's shale gas output reached 1.3 billion cubic meters, showing a good momentum of development. Shale gas is expected to change my country's energy structure and pattern, and is an important way to alleviate energy pressure. new fields of oil and gas exploration. At present, there are few methods for shale gas area selection, which is a weak link in the exploration and development work. The exploration of shale gas area selection methods is mainly qualitative, and the lack of quantitative and scientific methods restricts the accuracy and reliability of shale gas area selection. sex. Contents of the invention [0003] The purpose of the present invention is to provide a shale gas probability area selection method, which has strong operability and high reliability, can reas...

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Problems solved by technology

At present, there are few methods for shale gas area selection, which is a weak link in the exploration and development work. The exploration of shale gas area selection methods is mainly qualitative, and the lack of quantitative and scientific methods restricts the accuracy and reliability of shale gas area selection. sex

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