油气藏评价与开发 ›› 2021, Vol. 11 ›› Issue (2): 135-145.doi: 10.13809/j.cnki.cn32-1825/te.2021.02.001

• 专家论坛 •    下一篇

四川盆地深层页岩气规模有效开发面临的挑战与对策

何治亮1,2,3(),聂海宽1,2,4,蒋廷学1,5   

  1. 1.页岩油气富集机理与有效开发国家重点实验室,北京 100083
    2.中国石化页岩油气勘探开发重点实验室,北京 100083
    3.中国石化科技部,北京 100728
    4.中国石化石油勘探开发研究院,北京 100083
    5.中国石化石油工程技术研究院,北京 100101
  • 收稿日期:2021-01-12 出版日期:2021-04-26 发布日期:2021-04-30
  • 作者简介:何治亮(1963—),男,博士,教授级高级工程师,本刊第二届编委会顾问,主要从事石油与天然气地质学研究。地址:北京市朝阳区朝阳门北大街22号,邮政编码:100728。E-mail: hezhiliang@sinopec.com
  • 基金资助:
    国家自然科学基金项目“特提斯域内大陆单向裂解—聚合过程中的油气大规模富集效应”(91755211);国家自然科学基金项目“四川盆地五峰组—龙马溪组页岩气储层演化机理及评价方法”(41872124);中国石化科技项目“深层页岩气多维度地质工程参数评价研究”(P20046-1)

Challenges and countermeasures of effective development with large scale of deep shale gas in Sichuan Basin

HE Zhiliang1,2,3(),NIE Haikuan1,2,4,JIANG Tingxue1,5   

  1. 1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China
    2. Sinopec Key Laboratory of Shale Oil/Gas Exploration & Production, Beijing 100083, China
    3. Department of Science and Technology, Sinopec, Beijing 100728, China
    4. Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China
    5. Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China
  • Received:2021-01-12 Online:2021-04-26 Published:2021-04-30

摘要:

深层页岩气(埋深大于3 500 m)是四川盆地页岩气勘探开发重要的战略接替领域。尽管前期已在四川盆地五峰组—龙马溪组3 500~4 000 m钻获工业页岩气流,但由于递减速度快和EUR(估算最终可采储量)低,尚未实现规模性商业开发。基于对深层页岩气勘探开发现状分析,梳理了四川盆地深层页岩气规模高效开发面临的挑战,主要包括深层页岩气赋存机理和富集规律认识有待深化、经济有效压裂改造的工程工艺技术尚待建立以及深层页岩气开发组织运行和管理方式难以满足规模有效开发的需求。提出了实现深层页岩气规模有效开发三方面的应对策略:①深化深层页岩气富集规律认识,建立选区与目标评价方法,形成“甜点”和“甜窗”预测描述技术;②深化深层页岩气工程地质条件研究,并形成先进配套的钻井、压裂工程工艺技术与装备体系,充分解放地层产能;③推行地质—工程一体化,构建全新的体制机制,大幅度降低成本,实现深层页岩气开发效益最大化。四川盆地五峰组—龙马溪组在大于3 500 m的深层领域多口井获得工业气流并已提交探明储量,是优先开展深层页岩气开发实践的重点层段,通过深化地质认识、攻克关键技术难题和优化组织管理,大幅度提速降本增效,在较短的时间内可望实现规模有效开发,预期产量有望超过中—浅层。

关键词: 深层页岩气, 有效开发, 地质—工程一体化, 五峰组—龙马溪组, 四川盆地

Abstract:

Deep shale gas(buried depth is larger than 3 500 m) is the potential resource for future exploration in Sichuan Basin. Although the industrial shale gas flows have been obtained at the depth of 3 500~4 000 m in Wufeng-Longmaxi Formation of Sichuan Basin, the commercial development hasn’t been put into practice due to the rapid decline and the low EUR(Estimated Ultimate Recovery). Based on the analysis of the current status of shale gas exploration and development, the challenges in the deep shale gas development with high efficiency and large scale in Sichuan Basin have been summarized, mainly in the following aspects: the understanding of occurrence mechanism and enrichment law of deep shale gas needs to be deepened, engineering and technology of economical and effective fracturing treatment need to be established, and the organizational operations and management methods of deep shale gas development are difficult to meet the needs of the large-scale and high efficient development. Three countermeasures are proposed to realize the large-scale and highly efficient development of deep shale gas: ①deepening the understanding of deep shale gas enrichment laws, establishing the methods of area selection and evaluation, and forming the prediction and description technologies of “sweet spot” and “sweet window”; ②deepening the research on the geological conditions of deep shale gas, forming an advanced supporting technology of drilling and fracturing and an equipment system to fully release the reservoir capacity; ③promoting the geology-engineering integration, building a new system and mechanism, and greatly reducing the cost to maximize the development benefits of deep shale gas. The industrial gas flows have been obtained in several wells at the depth of more than 3 500 m of Wufeng-Longmaxi Formation in Sichuan Basin and the proven reserves have been submitted. It is the key and priority stratum of the deep shale gas development. By deepening the geological understanding, overcoming the key technical problems, and improving the management system, it can significantly accelerate the speed, reduce the cost, increase the efficiency and achieve a large-scale and highly efficient development in a relatively short period. The output is expected to be higher than that of the middle and shallow shale gas reservoir.

Key words: deep shale gas, effective development, geology-engineering integration, Wufeng-Longmaxi Formation, Sichuan Basin

中图分类号: 

  • TE122