长宁地区龙马溪组页岩气资源潜力分析

发布时间：2018-04-02 15:18

本文选题：页岩气　切入点：资源评价　出处：《西南石油大学》2015年硕士论文

【摘要】：页岩气藏有着独特的地质特征与成藏模式,具有强烈的非均质性,其资源评价方法不同于常规油气藏。本文以长宁地区龙马溪组页岩气资源潜力分析为研究对象,在调研国内外页岩气资源评价方法的基础上,针对页岩气聚集机理和特点,提出6种适合于不同勘探开发阶段的页岩气资源评价方法,包括成因法、容积法、含气量法、类比法、EUR法和特尔菲法。依据页岩资源评价方法,提出了6种资源评价参数取值方法,并建立和集成了多个页岩气参数图版。然后通过全岩X衍射、有机碳、成熟度、物性、氮气吸附、高倍显微镜和含气性等实验手段,研究了长宁地区龙马溪组页岩基本地质特征。研究认为研究区龙马溪组页岩埋深适中,有利于页岩气保存与开采；TOC含量高,有机质类型好,成熟度适中,具备良好的生气能力；孔渗性能好、密度低,含气量高,具备良好的储气能力。龙马溪组优质页岩气储层厚度为20m-63m。根据研究区勘探程度、地质特征和资料情况,选取了类比法、容积法和含气量法进行页岩气资源评价,采用图形数据取值、类比取值和公式取值3种方法确定了参数的选取,逐次进行了单个方法估算。分析不同方法计算结果的可靠性,采用特尔菲法综合计算研究区龙马溪组优质页岩段页岩气地质资源量为22489.8×108m3,平均资源丰度为5.8×108m3/km2,可采资源量为3216×108m3,综合表明研究区龙马溪组资源潜力丰富,并认为估算结果可靠性高、应用效果好。
[Abstract]:Shale gas reservoir has unique geological characteristics, reservoir forming model and strong heterogeneity, and its resource evaluation method is different from that of conventional oil and gas reservoir.In this paper, the potential analysis of shale gas resources in Longmaxi formation in Changning area is studied. Based on the investigation of the evaluation methods of shale gas resources at home and abroad, the mechanism and characteristics of shale gas accumulation are discussed.Six methods for evaluating shale gas resources at different stages of exploration and development are proposed, including genetic method, volumetric method, gas content method, analogy method and Delphi method.According to the method of shale resource evaluation, this paper puts forward six methods for evaluating the parameters of shale gas, and establishes and integrates several maps of shale gas parameters.The basic geological characteristics of the shale of Longmaxi formation in Changning area were studied by means of X-ray diffraction, organic carbon, maturity, physical properties, nitrogen adsorption, high power microscope and gas-bearing properties.It is considered that the suitable depth of shale buried in Longmaxi formation in the study area is conducive to high TOC content, good organic matter type, moderate maturity, good pore permeability, low density and high gas content in shale gas preservation and exploitation.Good gas storage ability.The thickness of high quality shale gas reservoir in Longmaxi formation is 20m-63m.According to the exploration degree, geological characteristics and data of the study area, the shale gas resources are evaluated by analogy method, volume method and gas content method. The selection of parameters is determined by three methods: figure data, analogy value and formula value.A single method of estimation was carried out one by one.The reliability of the calculation results of different methods is analyzed.The geological resources of high quality shale gas in Longmaxi formation are 22489.8 脳 108m3, the average abundance is 5.8 脳 108m3 / km2, and the recoverable resource is 3216 脳 108m3.The comprehensive calculation shows that the Longmaxi formation in the study area is rich in potential resources, and the reliability of the estimated results is high.The application effect is good.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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