贵州绥阳地区下寒武统牛蹄塘组页岩气地质特征及勘探方向

作    者：张志平1,2，程礼军1,3，曾春林4
单    位：（1 重庆地质矿产研究院；2 国土资源部页岩气资源与勘查技术重点实验室；3 重庆市页岩气资源与勘查工程技术研究中心；4 油气资源与探测国家重点实验室重庆页岩气研究中心）
基金项目：受油气资源与探测国家重点实验室开放课题基金项目“渝东南下寒武统富有机质页岩裂缝及其应力控制机制”资助
摘    要：
贵州绥阳地区广泛发育下寒武统牛蹄塘组海相黑色碳质页岩。页岩的厚度在30～50 m，埋藏深度小于3 000 m，具有较好的区域性封盖层，保存条件良好，是区内主要的页岩气目的层。页岩的有机质丰度TOC为1.5%～3.0%，成熟度Ro为 1.0%～3.5%。推测总含气量为0.3～1.2 m3/t，地质资源量为639.5×108 m3，资源潜力较大。页岩气可在区内隆起的低部位等处富集成藏。综合页岩气的区域地质特征和保存条件，提出了绥阳地区东北部是今后页岩气的重点勘探区域。
关键词：早寒武世；牛蹄塘组；海相地层；页岩气；保存条件；勘探前景；贵州

Geological Characteristics and Exploration Prospect of Lower Cambrian Niutitang Shale Gas in Suiyang Area, Guizhou

Author's Name: Zhang Zhiping, Cheng Lijun, Zeng Chunlin
Institution: Chongqing Research Institute of Geology Mineral Products
Abstract:
Based on observation and analysis of samples from outcrops and wells, a set of 30~50m thick Lower Cambrian Niutitang carbonaceous black shale is deep buried in Suiyang area, in the north of Guizhou. Thick regional overlying cap make the shale good condition of gas preservation so it is a good target of shale gas prospect in Guizhou. The analysis result shows that TOC is in the range of 1.5%~3% and Ro changes in 1.0%～3.5% in the gas-bearing black shale. The total desorbed gas content of 0.3～1.2m3/t and the potential gas reserves of 639.5×108m3 mean great resources potential in this area. It is indicated that shale gas can accumulate in the low positions of arches in this area. It is suggested that the best favorable prospecting area of shale gas is in the northeast of Suiyang area in the future.
Keywords: Early Cambrian; Shale gas; Preservation condition; Exploration prospect; Guizhou
投稿时间： 2014-10-21  
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