特种油气藏 ›› 2022, Vol. 29 ›› Issue (6): 20-28.DOI: 10.3969/j.issn.1006-6535.2022.06.003

• 地质勘探 • 上一篇    下一篇

泸州区块龙一14小层页岩气勘探开发潜力

周安富1, 谢伟1, 邱峋晰1, 吴伟2, 蒋裕强3, 戴赟1, 胡曦1, 尹兴平3   

  1. 1.四川页岩气勘探开发有限责任公司,四川 成都 610051;
    2.中国石油西南油气田分公司,四川 成都 610051;
    3.西南石油大学,四川 成都 610500
  • 收稿日期:2022-02-28 修回日期:2022-09-08 出版日期:2022-12-25 发布日期:2023-01-10
  • 通讯作者: 蒋裕强(1963—),男,教授,博士生导师,1985年毕业于西南石油学院石油地质专业,1993年毕业于该校煤田油气地质与勘探专业,获硕士学位,现主要从事油气地质方面教学研究工作。
  • 作者简介:周安富(1966—),男,高级工程师,1990年毕业于西南石油学院石油地质勘查专业,2004年毕业于该校地质工程专业,获硕士学位,现主要从事页岩气勘探开发地质技术管理工作。
  • 基金资助:
    中国石油-西南石油大学创新联合体项目二课题专题四“复杂地质条件下川南深层/昭通中浅层海相页岩气赋存机制及控制因素研究”(2020CX020104)

On Exploration and Development Potential of Shale Gas in Longyi14 Sub-bed in Luzhou Block

Zhou Anfu1, Xie Wei1, Qiu Xunxi1, Wu Wei2, Jiang Yuqiang3, Dai Yun1, Hu Xi1, Yin Xingping3   

  1. 1. Sichuan Shale Gas Exploration and Development Co., Ltd., Chengdu, Sichuan 610051, China;
    2. Shale Gas Research Institute, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610051, China;
    3. Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2022-02-28 Revised:2022-09-08 Online:2022-12-25 Published:2023-01-10

摘要: 为了明确泸州区块龙马溪组龙一14小层页岩储层特征及勘探开发潜力,实现川南龙马溪组页岩纵向立体开发,将泸州区块龙一14小层划分为a、b、c 3个单层,对各单层页岩厚度、有机质丰度、矿物组分、物性特征、储集空间类型及含气性特征进行分析。结果表明:泸州区块龙一14小层I类储层平均厚度为35.6 m,分布面积约为1 900 km2,地质资源量超过8 000×108m3,具有良好的勘探开发前景。其中,b单层页岩储层厚度大于20 m,TOC平均值大于2.5%,脆性矿物含量大于55%,孔隙度平均值为4.9%,含气量平均值为4.5 m3/t,展示出优越的储层条件。龙一14小层b单层页岩储层相较于现阶段主产层龙一11小层,具有更高的黏土含量和无机孔占比,在开采过程中需采用科学的压裂工艺和闷排措施,以取得更好的开发效果。研究成果将为拓展页岩气勘探开发层位,提高泸州区块龙马溪组页岩气资源动用程度提供技术支撑。

关键词: 页岩气, 龙马溪组, 立体开发, 勘探开发潜力, 泸州区块

Abstract: In order to clarify the characteristics and exploration and development potential of shale reservoirs in Longyi14 Sub-bed, Longmaxi Formation, Luzhou Block and to realize the longitudinal three-dimensional development of the shale reservoirs in Longmaxi Formation, Southern Sichuan, Longyi14 Sub-bed is divided into three single horizons: a, b and c, and their characteristics are analyzed, including shale thickness, organic matter abundance, mineral composition, physical characteristics, reservoir pace type and hydrocarbon showing. The result shows: Class I reservoir of Longyi14 Sub-bed in Luzhou Block is featured by an average thickness of 35.6 m, a distribution area of about 1 900 km2 and geological resources of more than 8 000×108m3, indicating bright prospects for exploration and development. The shale reservoir at Horizon b is of a thickness of greater than 20 m, an average TOC is greater than 2.5%, a content of brittle minerals of greater than 55%, an average porosity of 4.9%, and an average gas content of 4.5 m3/t, which demonstrates superior reservoir conditions. Compared with the current main pay - Longyi11 Sub-bed, the shale reservoir at Horizon b of Longyi14 Sub-bed has higher clay content and inorganic pore proportion, which requires scientific fracturing technology and shut-in and drainage measures in the exploitation process to achieve better development results. The results of the study will provide technical support for expanding shale gas exploration and development horizons and improving the production degree of shale gas resources in Longmaxi Formation, Luzhou Block.

Key words: Shale gas, Longmaxi Formation, three-dimensional development, exploration and development potential, Luzhou Block

中图分类号: