川南页岩气地质工程一体化实践成效与认识

doi:10.3969/j.issn.1672-7703.2024.03.008

摘要/Abstract

摘要： 川南页岩气地质工程一体化技术不仅成功地解决了复杂地质条件下的工程挑战，还显著提高了单井产量和预估最终可采储量（EUR）。概述了川南页岩气地质工程一体化的基本概念、核心内涵及其技术体系，并提出了适用于不同区块不同条件的高产井培育方法。研究结果表明：(1)所形成的地质工程一体化技术体系为页岩气井全生命周期的方案设计、现场实施提供了重要的决策依据和指导，有效解决了“压窜”“套变”等瓶颈问题，泸州区块套变率降低了19%，压窜率降低了31%；(2)持续迭代更新地质工程特征认识和一体化模型，可以显著提高设计的精准性、可靠性、吻合性、有效性；(3)实施地质工程一体化高产井培育方法，可大幅提高单井产量，其中长宁区块单井平均EUR提高到1.30×10⁸m³，增幅26%；渝西区块单井平均EUR提高到1.53×10⁸m³，增幅36%。高产井培育方法已在川南页岩气的不同区块得到推广应用，并取得了显著的成效，验证了该方法在提升单井产量和经济效益方面的重要性，也可为国内外非常规油气藏的规模效益开发提供借鉴。

关键词: 川南, 页岩气, 地质工程一体化, 长宁区块, 渝西区块, 泸州区块, 套变, 高产井

Abstract: The integrated technology of geological engineering in south Sichuan shale gas not only successfully solved the engineering challenges under complex geological conditions, but also significantly increased the production and EUR per well. This paper summarizes the basic concept, core connotation and technical system of the integration of geological engineering of shale gas in southern Sichuan, and puts forward the cultivation method of high production well suitable for different blocks and different conditions. The results show that: (1) the integrated technical system of geological engineering provides important decision-making basis and guidance for the scheme design and on-site implementation of shale gas wells in the whole life cycle, and effectively solves the bottleneck problems of "pressure channeling" and "casing deformation". The casing deformation and pressure channeling rate in Luzhou block are reduced by 19% and 31%. (2) Continuous iterative updating of geological engineering feature understanding and integrated model can significantly improve the accuracy, reliability, consistency and effectiveness of the design; (3) The implementation of the integrated high-yield well cultivation method of geological engineering can significantly increase the production of a single well, among which the average EUR of wells in Changning block increased to 1.30×10⁸m³, an increase of 26.2%; The average EUR of wells in the western Chongqing block increased to 1.53×10⁸m³, an increase of 36%. This method has been applied to different shale gas blocks in southern Sichuan, and remarkable results have been achieved, which verifies the importance of this method in improving the production and economic benefits of a single well, and can also provide reference for the economies of scale development of unconventional oil and gas reservoirs at home and abroad.

中图分类号:

TE319

吴建发, 曾波, 黄浩勇, 崔帅, 赵圣贤, 常程, 苟其勇. 川南页岩气地质工程一体化实践成效与认识[J]. 中国石油勘探, 2024, 29(3): 80-90.

Wu Jianfa, Zeng Bo, Huang Haoyong, Cui Shuai, Zhao Shengxian, Changcheng, Gou Qiyong. The Practice effect and understanding of the Integration of Geological Engineering of Shale Gas in Southern Sichuan[J]. China Petroleum Exploration, 2024, 29(3): 80-90.

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