西南石油大学学报(自然科学版) ›› 2024, Vol. 46 ›› Issue (6): 1-14.DOI: 10.11885/j.issn.1674-5086.2024.11.20.29

• 川南下寒武统筇竹寺组新类型页岩气高效勘探开发专刊 • 上一篇    下一篇

川南下寒武统筇竹寺组新类型页岩气勘探发现及启示

郭彤楼1, 熊亮1, 何建华2, 魏力民1, 闫亮1   

  1. 1. 中国石化西南油气分公司, 四川 成都 610041;
    2. 成都理工大学沉积地质研究院, 四川 成都 610059
  • 收稿日期:2024-11-20 发布日期:2025-03-08
  • 通讯作者: 郭彤楼,E-mail:tlguo@163.com
  • 作者简介:郭彤楼,1965年生,男,汉族,江苏邳州人,教授级高级工程师,博士,主要从事油气地质研究和勘探开发方面的研究工作。E-mail:tlguo@163.com
    熊亮,1975年生,男,汉族,四川岳池人,教授级高级工程师,主要从事油气勘探开发方面的研究及生产科研管理工作。E-mail:xiongliang.xnyq@sinopec.com
    何建华,1990年生,男,汉族,湖北荆州人,副研究员,主要从事非常规储层评价及地质力学方面的研究工作。E-mail:hejianhuadizhi@163.com
    魏力民,1970年生,男,汉族,四川宜宾人,高级工程师,主要从事页岩油气勘探开发及评价方面的研究工作。E-mail:weilimin.xnyq@sinopec.com
    闫亮,1984年生,男,汉族,河北河间人,副研究员,硕士,主要从事油气勘探和地球物理方面的研究工作。E-mail:yanliang.xnyq@sinopec.com
  • 基金资助:
    国家自然科学基金企业创新发展联合基金(U24B6001);中国石化股份有限公司科技项目(P22081)

New Type Shale Gas Exploration Discovery and Enlightenment of the Lower Cambrian Qiongzhusi Formation in the Southern Sichuan Basin

GUO Tonglou1, XIONG Liang1, HE Jianhua2, WEI Limin1, YAN Liang1   

  1. 1. Southwest Petroleum Branch, SINOPEC, Chengdu, Sichuan 610041, China;
    2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2024-11-20 Published:2025-03-08

摘要: 四川盆地龙马溪组页岩气累计探明储量3$\times$10$^{12}$ m$^3$,年产量超过250$\times$10$^{8}$ m$^3$,而筇竹寺组才取得商业勘探发现,目前正展开勘探评价。基于川南寒武系筇竹寺组页岩沉积、储层、地化、可压性和含气性等特征的综合研究,大量的基础实验数据,以及与龙马溪组页岩气形成条件的对比分析,结果表明,筇竹寺组页岩气在沉积环境、生烃能力、储集空间、含气性、矿物组成及可压性等方面与龙马溪组页岩气存在显著差异,代表了一种新类型。新类型页岩气主要发育于槽台沉积体系,热液活动较强,成烃生物类型多,生烃能力强;储集空间以无机孔为主,有机孔是有利补充;长英质含量高,整体表现出良好的可压性。综合预测认为绵阳—长宁凹槽是筇竹寺组页岩气有利区带。资阳、井研、威远地区已有多口井获得高产工业气流,证实了从深水到浅水、从高TOC到低TOC页岩,都能富集成藏,是新类型页岩气勘探开发的重点区域。研究成果不仅丰富了页岩气勘探开发的理论基础,还形成了一系列配套的勘探技术,对不同层系、不同地区页岩气勘探开发具有重要示范意义。

关键词: 筇竹寺组, 无机孔, 槽台沉积, 新类型页岩气, 勘探发现

Abstract: The Longmaxi Formation in the Sichuan Basin has a cumulative proven reserve of shale gas of 3$\times$10$^{12}$ m$^3$, with an annual production exceeding 250$\times$10$^{8}$ m$^3$. But the Qiongzhusi Formation, has just achieved commercial exploration discoveries and is currently undergoing exploration evaluation. Based on a comprehensive study of the characteristics of shale deposition, reservoir properties, geochemistry, fracability, and gas content in the Qiongzhusi Formation of the Cambrian System in southern Sichuan, along with extensive basic experimental data and a comparative analysis with the shale gas formation conditions in the Longmaxi Formation, the results indicate that the shale gas of the Qiongzhusi Formation exhibits significant differences from that of the Longmaxi Formation in terms of depositional environment, hydrocarbon generation capacity, storage space, gas content, mineral composition, and fracability, representing a new type. This new type of shale gas predominantly develops in trough-and-platform depositional systems, with strong hydrothermal activity, diverse hydrocarbon-generating organisms, and high hydrocarbon generation capacity. The storage space is dominated by inorganic pores, with organic pores serving as a beneficial supplement. The high content of feldspar and quartz minerals contributes to its overall good fracability. Comprehensive predictions suggest that the Mianyang—Changning trough is a favorable zone for shale gas in the Qiongzhusi Formation. Multiple wells in the Ziyang, Jingyan, and Weiyuan areas have achieved high-yield industrial gas flows, confirming that shale, ranging from deepwater to shallow water and from high to low TOC, can be enriched and form reservoirs. These areas are key regions for the exploration and development of this new type of shale gas. The research findings not only enrich the theoretical foundation of shale gas exploration and development but also establish a series of supporting exploration technologies, providing important demonstrative significance for shale gas exploration and development in different formations and regions.

Key words: Qiongzhusi Formation, inorganic pores, trough-and-platform deposition, new type of shale gas, exploration discovery

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