| 李 平.沁水盆地煤系页岩气成藏模式分析[J].地质与勘探,2018,54(2):395-403 |
| 沁水盆地煤系页岩气成藏模式分析 |
| Reservoir models of the coal measure shale gas in the Qinshui basin |
| 投稿时间：2017-01-15 修订日期：2017-10-25 |
| DOI：10.12134/j.dzykt.2018.02.019 |
| 中文关键词: 海陆过渡相 页岩气 成藏模式 沁水盆地 |
| 英文关键词: marine-continental transitional facies, shale gas, reservoir model, Qinshui basin |
| 基金项目:山西省煤基重点科技攻关项目（编号：MQ2014-02）、国家基础研究发展计划（编号：2012CB214702）联合资助 |
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| 中文摘要: |
| 本次研究分析了石炭纪-二叠纪海陆过渡相泥页岩测试数据和地质资料，依据海陆过渡相泥页岩地球化学、储层物性、含气性等特征，探讨了海陆过渡相页岩气的成藏模式。在生气模式方面，海陆过渡相页岩气以自生为主，他生为辅，煤层作为补充气源，热演化进程方面要求低于海相泥页岩；在储气模式方面，海陆过渡相泥页岩储层更加致密，孔隙度更小，对游离气的存储能力相对较差；在吸附气存储方面，储层的最大吸附量受控于泥页岩有机质丰度；在保存模式方面，页岩气保存受泥页岩厚度、构造埋藏史、基本构造形态等多种因素的控制，且任一种不利控制因素可能破坏页岩气藏。 |
| 英文摘要: |
| This work?has analyzed a large number of geological and rock test data of the?Carboniferous-Permian shale of marine-continental transitional facies in the Qinshui basin. Based on features of?geochemistry,?reservoir physical properties and?gas bearing of this shale, we have explored reservoir models of this basin. In the gas generation model, shale gas of marine-continental transitional facies is dominated by spontaneous generation next is the allogenetic gas, while the coal-forming gas is a complementary source, which requires less thermal evolution than marine shale. In the storage model, the transitional facies shale reservoir is more compact, of less porosity, so storage capacity for free gas is relatively poor. In the adsorbed gas storage, the maximum adsorption is controlled by the abundance of organic matter in the shale. In the preservation model, shale gas preservation depends on multiple factors such as shale thickness, tectonic burial history and structural shape, in which any unfavorable condition can lead to the destruction of shale gas reservoirs. |
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