中国石油勘探 ›› 2015, Vol. 20 ›› Issue (4): 1-23.

• 石油地质 •    下一篇

地质—工程一体化高效开发中国南方海相页岩气

吴奇1梁兴2鲜成钢3李峋4   

  1. 1中国石油勘探与生产分公司
    2中国石油浙江油田公司
    3斯伦贝谢中国公司
    4斯伦贝谢长和油田工程有限公司
  • 出版日期:2015-07-15 发布日期:2015-07-14
  • 基金资助:
    国家科技重大专项 云南昭通页岩气开采试验(2012ZX05018-006);中国石油天然气集团公司重大专项昭通示范区页岩气钻采工程技术现场试验(2014F47-02)

Geoscience-to-Production Integration Ensures Effective and Efficient South China Marine Shale Gas Development

Wu Qi1Liang Xing2Xian Chenggang3Li Xun4   

  1. 1 PetroChina Exploration and Production Company
    2 PetroChina Zhejiang Oilfield Company
    3 Schlumberger China
    4Schlumberger Changhe Petroleum Ltd
  • Online:2015-07-15 Published:2015-07-14
  • Supported by:
     

摘要: 中国南方海相页岩气区具有不同于北美页岩气区的地面条件和地下地质条件,因此,四川盆地及周缘海相页岩气区很难采用北美大规模、高密度、连片化布井的开发模式,为此引入了地质—工程一体化的理念。针对钻井技术及工程难度大、建井周期长、建井综合成本高问题,首次提出钻井品质概念,结合北美页岩气开发实践形成的储层品质和完井品质概念,提出了适用于中国页岩气开发特点的“品质三角形”。在此基础上,提出了主要针对中国南方海相页岩气开发的地质—工程一体化实施的技术路线。围绕提高页岩气单井产量这个关键问题,在丛式水平井平台工厂化开发方案实施过程中,对钻井、固井、压裂、试采和生产等多学科知识和工程作业经验进行系统性、针对性和快速的积累和总结,对工程技术方案进行不断调整和完善,在页岩气开发区块、工厂化平台和单井3种尺度,分层次、动态地优化工程效率与开发效益,实现页岩气的经济开发和效益开发。昭通国家级页岩气示范区黄金坝YS108区块开展地质—工程一体化实践所取得的经验和应用效果,证明其具有有效性和推广价值,并基于现有数据和研究成果,探讨了龙马溪组海相页岩气的高产富集规律。

 

关键词: 地质&mdash, 工程一体化;技术路线;龙马溪组;页岩气;四川盆地;黄金坝

Abstract: Shale gas development in Sichuan Basin and its adjacent areas can be difficult to apply as same mega-scale, high density and continuous and regular pad drilling as in North America (NA) because of significantly different surface and subsurface conditions than NA. In order to speed up development of marine shale gas in Sichuan Basin and its adjacent areas with minimized learning curve, this paper introduces geoscience-to-production integration of research, engineering and operation with its associated theory, methodology and workflow. Drilling Quality is firstly established because of significant challenges to drilling technologies and engineering, long well-construction cycle, and high overall cost of well. Together with Reservoir Quality and Completion Quality which are already applied in NA’s shales, the Quality Triangle is formed to respect the uniqueness of China.s shale plays. This Quality Triangle forms the basis for an innovative development workflow to implement geoscience-to-production integration of research, engineering and operation. In the rapid progress of factory drilling and completion of shale gas development, it aims to dynamically optimize both efficiency and effectiveness at single well, pad, and field scales with ensured systematically and continuously optimizing technologies and solutions, and accumulating knowledge and experiences in order to ultimately enhance well productivities. This paper summarizes the implementation and success of the described such into the Zhaotong Huangjinba National Shale Gas Demonstration Project. The success proves the essential valuesand general applicability of the proposed philosophy into other adjacent shale gas projects and even other unconventional blocks. Additionally, controlling factor of high productivity of the Longmaxi shale will be discussed based on currently available data and understanding.

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