天然气工业2025，Vol.45Issue(12)：125-138,14.DOI:10.3787/j.issn.1000-0976.2025.12.010
深层页岩气储层高效改造关键技术与矿场实践
Key technologies and field practices of full-field support and transformation for deep shale gas reservoirs
摘要
Abstract
Deep shale oil and gas represent one of China's key resources for achieving additional reserves and production.However,deep shale gas reservoirs exhibit significant heterogeneity,large stress difference,and challenges in sustaining enhanced production effects over the long term,severely limiting their deliverability.This paper proposes a treatment concept integrating sweet spot intelligent evaluation-multi-fracture expansion with multi-objective optimization-comprehensive support,facilitating the high-quality advancement of key stimulation technologies for deep shale gas reservoirs.Through sweet spot intelligent evaluation to classify and characterize shale gas reservoirs based on geology-engineering integration,an underground"transparent geological body"is constructed.Multi-fracture expansion in deep shale reservoirs and multi-objective optimization of operation parameters are employed to enhance the stimulated reservoir volume(SRV)while maintaining balanced fracture propagation and optimal treatment width,forming complex fracture networks.The"Advance,Extend,Elevate,Prevent"comprehensive support technology addresses insufficient artificial fracture retention and the rapid decline in production following initial high yield in deep shale gas wells,ensuring sustained production.The following results are obtained.First,the unsupervised learning-based sweet spot intelligent evaluation method enables precise reservoir classification even without production data,guiding the fracturing operation parameter matching and expanding the application scope of data-driven sweet spot evaluation.Second,the multi-fracture expansion and multi-objective optimization method verifies balanced fracture expansion under different operation parameters.Based on SRV and fracture morphology,optimal parameters for new wells are determined.Third,wells employing the full-field support technology achieved an increase of 10.14％in average estimated ultimate recovery(EUR),with an average sand production rate of 0.73％.In contrast,wells without using this technology exhibited an average sand production rate of 2.72％,demonstrating an effective sand control and long-term fracture maintenance.After applying the stimulation technology integrating sweet spot intelligent evaluation-multi-fracture expansion with multi-objective optimization-comprehensive support,new wells achieved an average daily gas production increase of 155％compared with two neighboring wells with similar geological and engineering conditions.The proposed concept and technology can effectively improve the fracturing performance in deep shale gas reservoirs and maintain long-term high production of wells,providing valuable guidance for the development of similar deep shale gas reservoirs.关键词
深层页岩/四川盆地/地质工程一体化/多裂缝扩展/多目标优化/全域支撑Key words
Deep shale/Sichuan Basin/Geology-engineering integration/Multi-fracture propagation/Multi-objective optimization/Comprehensive support分类
能源科技引用本文复制引用
郭建春,吴涛,曾凡辉,张宇,高洁,汪敏,肖勇军..深层页岩气储层高效改造关键技术与矿场实践[J].天然气工业,2025,45(12):125-138,14.基金项目
国家自然科学基金面上项目"基于知识数据融合的深层页岩压裂参数自适应调控研究"(编号:52574047)、"大数据驱动的深层页岩压裂参数协同优化与实时调控研究"(编号:52374045),国家自然科学基金企业创新发展联合基金项目"湖相多岩相组合页岩油气储层成缝机制及有效开采机理研究"(编号:U23B6004),四川省科技教育联合基金重点项目"深层页岩水平井压裂参数智能优化与在线调控研究"(编号:2025NSFSC2008). （编号:52574047）
