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川西马井气田碎屑岩测井储层参数评价研究
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摘要
近年来,马井白垩系中相继发现天然气藏,表明了浅部地层巨大的勘探开发潜力,加强浅层天然气的综合研究势在必行,亟需搞清楚川西地区浅部地层的含气状况,勘探前景。
     要搞清楚地层的含气状况,则需要开展两方面的工作,即储层参数计算模型建立与含水含气性识别。
     对于测井解释模型的研究,充分利用已有的测井数据和岩芯实验分析结果,分析岩芯物性参数与测井曲线间关系,对测井曲线作孔隙度、渗透率、含水饱和度参数的岩芯刻度。
     对于含水含气性识别,川西马井地区下白垩统含气性识别一直是测井解释的难点,主要在于储层含气性差异分辨较困难,气和水在测井曲线上的响应比较接近,过去解释的部分气层测试却产水,常规的测井解释方法很难将二者区分开。本次论文以钻井录井显示和测试结果为依据,利用交会图分析技术,相互对比寻找出区分含水与含气的定性与定量指标,成功地对储层含气、水性质进行了识别;利用BP网络分析识别储层类型,利用模糊聚类分析技术,将测试产水井段与产水井段数据分别作聚类分析,确定出各自的类数和类中心,建立起聚类模型,将所建模型对其它储层段进行含流体性质及差异分析,成功地对含气性差异进行了判别。在此基础上,对含气性进行评价,指出了有利的含气层位及区域。
Recently, natural gas was discovered gradually in Majing cretaceous , which displayed shallow stratum have the large exploration and development potentialities. These emphasize the comprehensive research in natural gas of shallow stratum. And this research is very necessary to know the gas-bearing condition and exploration prospect in the western of Sichuan district.
    To know the gas-bearing condition in shallow stratum, it must do two main works: calculate the store parameter and modeling set and distinguish hydrous and gas.
    With reference to research of the logging interpretation model, it should exploit fully logging datum and the results of well core experimental analysis which was existed and analyze the relationship between the quality parameter of well core materiality and brothel log, which should further be understood in porosity, coefficient of permeability and water degree of saturation in well-core graduation.
    With regard to distinguishing containing of the water and gas, the cretaceous is the difficult point on logging interpretation all the time in the Majing of western of Sichuan. It is mainly the diversity of the containing of gas and water is very difficult to distinguish. Gas and water react very closely in the log. The partly gas stratum produce the water in the past logging interpretation method can't distinguish them easily. According to the logging and brothel logging shows and testing results, this thesis will utilize the cross-plot analysis technology to look for the qualification and quantity index of the containing water and gas by mutual comparison, triumphantly discern the containing gas and water quality in the store stratum; Using B-P Network can recognize the reservoir; the utilize the fuzzy cluster analysis technology to cluster analyze separately the water well section and water quality well in the store stratum, settle the type datum and central type distinctly and analyze fluidity's material quality and diversity in all models and others store stratum, triumphantly distinguish the diversity of the containing water and gas. Above the base statement, scientists comment the containing gas quality and point out the helpful the stratum of containing gas and area.
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