CAJ | 학술논문

页岩气是一种重要的非常规油气资源，其评价方法不同于常规油气资源。以页岩气聚集机理及形成过程为依据，结合中国页岩气勘探开发现状，认为体积法是适合中国现阶段页岩气资源评价的最优方法。结合财政部对页岩气的界定标准及中扬子地区五峰组—龙马溪组泥页岩有机质成熟度、埋深、含气量、保存、地表条件等因素，认为研究区目的层页岩气勘探开发有利区位于出恩施—彭水地区；以体积法计算页岩气资源量的原理为依据，对有利区含气页岩面积、有效页岩厚度、密度等参数采用确定性赋值，其值分别为5174 km2、57 m、2.71 t/m3；并采用条件概率赋值法分别对有机碳含量、总孔隙度、含气饱和度等不确定性参数进行条件概率赋值。最终估算出了有利区内五峰组—龙马溪组页岩气地质资源量为5434.7×108 m3。
혈암기시일충중요적비상규유기자원，기평개방법불동우상규유기자원。이혈암기취집궤리급형성과정위의거，결합중국혈암기감탐개발현상，인위체적법시괄합중국현계단혈암기자원평개적최우방법。결합재정부대혈암기적계정표준급중양자지구오봉조—룡마계조니혈암유궤질성숙도、매심、함기량、보존、지표조건등인소，인위연구구목적층혈암기감탐개발유리구위우출은시—팽수지구；이체적법계산혈암기자원량적원리위의거，대유리구함기혈암면적、유효혈암후도、밀도등삼수채용학정성부치，기치분별위5174 km2、57 m、2.71 t/m3；병채용조건개솔부치법분별대유궤탄함량、총공극도、함기포화도등불학정성삼수진행조건개솔부치。최종고산출료유리구내오봉조—룡마계조혈암기지질자원량위5434.7×108 m3。
The evaluation method for shale gas, which is a very important unconventional oil and gas resource, is different from that for conventional oil and gas resources. According to the accumulation mechanism and formation process, the volumetric method seems to be the best method for evaluating shale gas resources in consideration of research status in China. In this paper, based on the analysis of maturity of organic matter, depth, gas content, preservation condition, surface environment of shale of Wufeng-Longmaxi Formation in the Middle Yangtze region, in combination with the definition standard of shale gas by Ministry of Finance, the authors hold that the Enshi-Pengshui area is a favorable area for exploration and development. According to the volume method principle for computing the shale gas resources, the acreage, thickness and density of gas-bearing shale in this area are 5174 km2, 57 m, and 2.71 t/m3 respectively. In accordance with the conditional probability, the authors assigned conditional probabilities to uncertain parameters, which include such factors as organic carbon content, total porosity and gas saturation. Finally, the geological resources of shale gas in favorable areas of Wufeng-Longmaxi Formation are estimated to be at 5434.7×108 m3.