Classification and evaluation criteria of shale oil and gas resources: Discussion and application
Classification and evaluation criteria of shale oil and gas resources: Discussion and application
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页岩油气资源分类与评价标准：讨论与应用
DOI：
10.1016/s1876-3804(12)60042-1
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发表时间：
2012-04-01
影响因子：
7.5
通讯作者：
Cai Xiyuan
中科院分区：
文献类型：
--
作者：
Lu Shuangfang;Huang Wenbiao;Cai Xiyuan
开展页岩油气评价标准研究，准确评价页岩油气资源潜力。对松辽、海拉尔、济阳等5个地区的烃源岩地球化学指标进行了统计分析，根据油源岩含油率与总有机碳三分性的特点，将页岩油气分为资源分散(无效)资源、低效资源和资源富集型三个层次。成熟阶段是有机质大量生成油气的阶段，相当于页岩油气的富集期。在此基础上，定义了可采指数，并提出了相应的计算公式，综合考虑了泥岩的脆性矿物含量、厚度和深度等因素，为评价可采性提供了定量指标。在实际应用中，利用TOC-测井对应关系得到的井剖面TOC变量值可以绘制TOC等厚图，计算不同层次的资源量。然后结合评价标准，将TOC图和R-O等厚图叠加，识别出有利的页岩油气区。
Research on the evaluation criteria of shale oil and gas is conducted to accurately assess the resource potential of shale oil and gas. Statistic analysis of the geochemical index of hydrocarbon source rocks in five areas such as Songliao, Hailaer, Jiyang, based on the characteristic of triple-division between the oil content and TOC of source rock, suggests that shale oil and gas can be categorized into three levels of resource enrichment: scattered (ineffective) resources, low efficient resources and enriched resources. The mature stage, at which organic matter generates oil and gas in large amounts, corresponds to the shale oil and gas enrichment window. Furthermore, recoverable index is defined and its computation formula is proposed to provide a quantitative index for recoverability evaluation, considering the brittle mineral content, thickness and depth of shale, etc. In practice, TOC variable values in well profile obtained by TOC-logging correspondence can be used to draw TOC isopach maps and calculate the amount of resources at different levels. Then combined with the evaluation criteria, TOC and R-o isopach maps are superimposed to identify the favorable shale oil and gasareas.