油气藏评价与开发 >
2021 , Vol. 11 >Issue 1: 14 - 21
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2021.01.003
川南寒武系筇竹寺组勘探潜力研究
收稿日期: 2020-10-23
网络出版日期: 2021-02-04
基金资助
“十三五”国家科技重大专项“南方海相页岩气勘探潜力与目标评价”(2017ZX05036-003)
Exploration potential of Cambrian Qiongzhusi Formation in southern Sichuan Basin
Received date: 2020-10-23
Online published: 2021-02-04
川南下寒武统筇竹寺组勘探实践表明,页岩厚度薄且多套叠置,页岩层段测试及试采效果不佳。为进一步落实该区有利勘探目标,实现寒武系筇竹寺组效益开发,开展了系统取心、岩心观察及实验分析。结果表明：①川南下寒武统筇竹寺组发育泥页岩、（泥质）粉砂岩、粉砂质页岩等多种岩性,页岩厚度相对较薄,纵向不连续沉积;②页岩热演化程度过高,储集空间类型以无机孔为主,含粉砂质储层段无机孔也占主导地位;③不同岩性的储层品质相当,均具备储集能力;④钻井揭示位于筇竹寺组中部的含粉砂泥页岩段厚度大、储层物性好、含气性好,是有利目标层段。研究认识对该区拓宽勘探思路具有重要的指导意义。
熊亮 , 葛忠伟 , 王同 , 温真桃 , 钟文俊 , 周桦 , 何显莉 . 川南寒武系筇竹寺组勘探潜力研究[J]. 油气藏评价与开发, 2021 , 11(1) : 14 -21 . DOI: 10.13809/j.cnki.cn32-1825/te.2021.01.003
The exploration of the lower Cambrian Qiongzhusi Formation in southern Sichuan Basin shows that the shale is thin with multiple strata series, which restricts the effects of testing and pilot production. In order to further implement the favorable exploration targets and realize the benefit development of the Cambrian Qiongzhusi Formation, systematic coring, core observation and experimental analysis have been carried out. The results show that: ①Shale,siltstone（or argillaceous siltstone）, silty shale and other lithology develop in the lower Cambrian Qiongzhusi Formation in southern Sichuan Basin. Shale is relatively thin with longitudinal discontinuous deposition. ②The thermal evolution degree of shale is too high. The reservoir spaces are mainly inorganic pores, meanwhile, inorganic pores are also dominant in silty reservoir section. ③The reservoir quality of various types of lithologic combination section are similar, and they all have storage capacity. ④Drilling reveals that the siltstone-bearing shale in the middle of Qiongzhusi formation is thick with good physical and gas-bearing property, which is the favorable target interval. The research and understanding is of great significance to broaden the exploration ideas in this area.
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