刘合,李金波,余昊,陶嘉平,王全,李东旭,孟思炜
LIU He,LI Jinbo,YU Hao,TAO Jiaping,WANG Quan,LI Dongxu,MENG Siwei

• 1:多资源协同陆相页岩油绿色开采全国重点实验室
• 2:中国石油勘探开发研究院
• 3:湖南工商大学资源环境学院
• 4:东北石油大学机械科学与工程学院

摘要(Abstract)：

古龙页岩页理、纹层发育，非均质性强，常规测井精度无法满足储层地质力学的精细表征需求，制约了压裂工程方案设计。以储层地质力学精细评价为切入点，通过高精度划痕测试技术深入剖析不同岩性的力学特征差异，并与测井数据对比，验证了高精度划痕测试的准确性和适用性。进一步构建并对比了基于常规测井数据建立的分层非均质模型和引入高精度划痕测量修正的分层各向异性模型，水力裂缝扩展模拟结果显示，修正后模型预测裂缝高度显著减小。模拟结果证实了强非均质性特征下古龙页岩人工裂缝穿层扩展困难，改造规模难以提高。研究成果为古龙页岩油储层压裂工程设计提供了理论与实践依据。
Gulong shale exhibits well-developed beddings and laminae with high heterogeneity. Conventional logging accuracy cannot meet the requirement of fine characterization for reservoir geomechanics, which restricts the design of fracturing engineering schemes. Taking fine evaluation of reservoir geomechanics as starting point, mechanical characteristics differences of different lithologies are deeply analyzed through high-precision scratch testing, and the accuracy and applicability of high-precision scratch testing are verified by comparing with logging data. A conventional-logging data based layered heterogeneity model and a layered anisotropic model corrected by introduced high-precision scratch measurement are further established and compared. Simulation results of hydraulic fracture propagation show that the corrected model predicts significantly reduced fracture heights. Simulation results confirm that under high heterogeneity characteristics of Gulong shale, artificial fractures penetrating-layers propagation is difficult, making it challenging to improve the stimulation scale. The research provides theoretical and practical basis for fracturing engineering design of Gulong shale oil reservoirs.

关键词(KeyWords)： 古龙页岩;非均质;富页理;高精度测量;裂缝扩展
Gulong shale;heterogeneity;bedding-rich;high-precision measurement;fracture propagation

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司科技项目“页岩油气开发机理与体积开发技术研究”(2023ZZ08);; 湖南省科技创新计划项目“湖南省科技创新计划‘湘聚人才’项目”(2022RC4037);; 国家自然科学基金青年科学基金项目“陆相页岩油储层复杂裂缝控近扩远机制研究”(52404027);国家自然科学基金面上项目“页岩油藏CO2前置压裂微观裂缝结构及其演化机理研究”(52274058);; 中国石油科技创新基金项目“深层页岩弹塑性多尺度表征及复杂裂缝扩展机理研究”(2024DQ02-0128)

作者(Author): 刘合,李金波,余昊,陶嘉平,王全,李东旭,孟思炜
LIU He,LI Jinbo,YU Hao,TAO Jiaping,WANG Quan,LI Dongxu,MENG Siwei

DOI: 10.19597/J.ISSN.1000-3754.202511019

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