浅层致密油藏压裂施工关键参数优化  

Optimization of Key Parameters for Fracturing Operation in Shallow Tight Oil Reservoirs

作　　者：樊平天 刘月田[1] 段景涛[2] 甘茂宗 杨潇文 宋宪坤 刘程郅 FAN Ping-tian;LIU Yue-tian;DUAN Jing-tao;GAN Mao-zong;YANG Xiao-wen;SONG Xian-kun;LIU Cheng-zhi(College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;Nanniwan Oil Production Plant,Yanchang Oilfield Co.,Ltd.,Yan'an 716000,China)

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]延长油田股份有限公司南泥湾采油厂,延安716000

出　　处：《科学技术与工程》2025年第9期3664-3671,共8页Science Technology and Engineering

基　　金：国家自然科学基金(52274048);北京市自然科学基金(3222037);陕西省技术创新引导专项计划(2023-YD-CGZH-02)。

摘　　要：鄂尔多斯盆地东部致密油藏储层浅,压力低,地应力主值小,破裂压力低,明显不同于一般中深层致密油藏。此前该区域油藏水平井压裂开发主要依赖现场经验,压裂施工设计缺少理论依据,施工参数影响规律不清楚,增产效果难以保证,亟须开展压裂施工关键参数优化研究。以产能效益最大化为目标,通过压裂模拟与油藏数值模拟一体化研究方法,使用FrSmart进行压裂模拟、Petrel构建油藏地质模型和tNavigator进行数值模拟,综合运用多种模拟软件对压裂施工关键参数进行优化设计,最终得到了适合该油藏水平井压裂施工的最优簇间距、排量和单段液量。通过调整研究区YCN-1井常规体积压裂工艺参数,簇间距改用20 m,排量12 m^(3)/min,单段液量增至1000 m^(3),显著提高了压裂和增产效果。现场试验结果表明,压裂参数优化后的YCN-1井产量比未优化的N-2、N-3井高出29.98%和50.27%。可见该方法对于指导浅层致密油藏压裂施工、提升压裂效率和增产效果具有重要的指导意义。The tight oil reservoirs in the eastern Ordos Basin are characterized by shallow burial,low pressure,small principal geostress,and low fracture pressure,which are significantly different from the general mid-deep tight oil reservoirs.Previously,the development of horizontal wells in this area through hydraulic fracturing was mainly based on field experience,and the design of the fracturing construction lacked a theoretical foundation,making the impact pattern of construction parameters unclear and the enhancement of production effect uncertain.Hence,research on the optimization of key parameters in fracturing construction is urgently needed.To maximize production efficiency,an integrated research method involving fracturing simulation and numerical reservoir simulation has been adopted.FrSmart has been used for fracturing simulation,Petrel for building geological reservoir models,and tNavigator for numerical simulation.Through the comprehensive application of various numerical simulation software,optimal cluster spacing,displacement,and single-segment fluid volume suitable for horizontal well fracturing in the reservoir were determined.By adjusting the conventional volume fracturing process parameters of well YCN-1 in the study area to a cluster spacing of 20 m,a displacement of 12 m^(3)/min,and increasing the single-segment fluid volume to 1000 m^(3),significant improvements in fracturing and production enhancement effects were achieved.Field test results show that the production of well YCN-1 after optimizing fracturing parameters is 29.98%and 50.27%higher than that of the unoptimized wells N-2 and N-3,respectively.Therefore,a method of critical significance for guiding the fracturing construction of shallow tight oil reservoirs,enhancing fracturing efficiency,and improving production effects has been proposed.

关 键 词：致密油藏 压裂模拟 数值模拟 参数优化 

分 类 号：TE357[石油与天然气工程—油气田开发工程]