闫骁伦,李越,李铭琪,刘会胜,马新仿,张士诚,肖聪
YAN Xiaolun,LI Yue,LI Mingqi,LIU Huisheng,MA Xinfang,ZHANG Shicheng,XIAO Cong

• 1:中国石油川庆钻探工程有限公司长庆井下技术作业公司
• 2:安徽理工大学碳中和科学与工程学院
• 3:中国石油川庆钻探工程有限公司钻采工程技术研究院
• 4:中海油田服务股份有限公司

摘要(Abstract)：

针对准噶尔盆地玛湖地区致密油藏水平井组“工厂化”压裂作业过程中出现的井间窜扰成因认识不清的问题，基于地质工程一体化的研究思路，建立了实际地层的地质力学模型，采用有限元方法反演计算储层初始地应力场，并利用蚂蚁体与地震体属性融合方法通过断层自动拾取技术建立了储层多尺度确定性天然裂缝模型，形成了“地应力场反演-天然裂缝识别-复杂裂缝扩展”一体化建模和分析流程，研究分析了储层地应力场和天然裂缝带的组合特征对压裂窜扰的影响，以及实际窜扰井组的压裂后缝网形态和井间裂缝沟通情况。结果表明：多簇裂缝的非均衡、非对称扩展是造成玛湖地区“多井连片、多段连通”复杂压裂窜扰的内在原因，受到低逼近角小断层诱导作用和高逼近角大尺度天然裂缝捕获作用的双重影响，为主要控制因素；而小尺度天然裂缝和岩石力学参数非均匀分布对多簇裂缝非均衡、非对称扩展的影响较小，为次要控制因素；合理利用储层断裂系统、控制压裂改造强度可有效降低致密储层水平井压裂窜扰的风险。研究成果可为致密油藏水平井组压裂开发提供技术指导。
Aiming at the unclear understanding of causes of inter-well Fracture-Driven Interactions(FDIs) during the “factory” fracturing operation of horizontal well pattern in Mahu tight reservoir of Junggar Basin, a geomechanical model under actual formation conditions is established based on the research idea of integrated geoscience-engineering. Finite element method is used to invert and calculate the initial in-situ stress field of the reservoir. Moreover, by using attributes fusion method of ant body and seismic body and through the fault automatic-picking technology, a multi-scale deterministic natural fracture model of the reservoir is established, forming an integrated modeling and analysis process of “in-situ stress field inversion-natural fracture identification-complex fracture propagation”. The influence of combination characteristics of reservoir in-situ stress field and natural fracture zones on FDIs, as well as the fracture network morphology after fracturing and the conection of inter-well fractures of the actual well pattern with interactions are studied and analyzed. The results show that the non-uniform and asymmetrical propagation of multi-clusters fractures is the internal cause for the complex FDIs characterized by “multi-wells contiguous distribution and multi-intervals connected” in Mahu area. It is affected by both the induction effect of small faults with lower approach angles and the capture effect of large-scale natural fractures with higher approaching angles, which are the main controlling factors. However, small-scale natural fractures and the non-uniform distribution of rock mechanical parameters are the secondary controlling factors, which have relatively small impact on the non-uniform and asymmetrical propagation of multi-clusters fractures. It is concluded that the reasonable utilization of reservoir fault system and the control of fracturing intensity can effectively reduce the risk of FDIs in tight reservoirs. The research provides technical guidance for fracturing development of horizontal well pattern in tight reservoirs.

关键词(KeyWords)： 压裂窜扰;复杂裂缝扩展;地质工程一体化;致密油藏;天然裂缝;玛湖地区
Fracture-Driven Interactions(FDI);complex fracture propagation;geoscience-engineering integration;tight reservoir;natural fracture;Mahu area

Abstract:

Keywords:

基金项目(Foundation): 安徽理工大学高层次引进人才科研启动基金“断控缝洞型碳酸盐岩储层水力压裂裂缝扩展规律研究”（2024yjrc34）

作者(Author): 闫骁伦,李越,李铭琪,刘会胜,马新仿,张士诚,肖聪
YAN Xiaolun,LI Yue,LI Mingqi,LIU Huisheng,MA Xinfang,ZHANG Shicheng,XIAO Cong

DOI: 10.19597/J.ISSN.1000-3754.202409011

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