基于波前快速法的页岩气藏重复压裂储层动用评价方法  

Reservoir evaluation method for refracturing in shale gas reservoir based on fast marching method

作　　者：王聪 黄世军[1] 赵凤兰[1] 李金仓 陈新阳 苏哲烨 罗瑞兰[2] WANG Cong;HUANG Shijun;ZHAO Fenglan;LI Jincang;CHEN Xinyang;SU Zheye;LUO Ruilan(College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China)

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石油勘探开发研究院,北京100083

出　　处：《断块油气田》2023年第6期940-946,共7页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目“页岩储层条件下水对甲烷-二氧化碳竞争吸附的影响及相互作用机制研究”(51974328);中国石油集团重大科技专项基金项目“碳酸盐岩油气藏提高采收率关键技术研究”(2021JD1504)。

摘　　要：页岩气藏在初次压裂之后,产量会快速下降,目前通常采用的稳产措施是重复压裂,因此需要对储层动用体积进行定量评价,并对重复压裂的参数进行优化,即建立适用于页岩气藏的重复压裂储层动用评价方法,以保证重复压裂效果。文中引入重复压裂时机和流动系数等参数,建立了适用于重复压裂开发效果评价的波前快速推进法,可以快速有效地定量评价重复压裂前后页岩气藏的储层动用体积,优选了重复压裂时机,研究了重复压裂方式对储层动用体积的影响。结果表明:在初次压裂后第2年进行重复压裂,储层动用效果最好;提高储层动用效果最好的重复压裂方式是缝内暂堵转向,封堵老缝、补压新缝和改善老缝导流能力的效果较差。研究成果对同类页岩气藏重复压裂优化设计具有借鉴意义。After the initial fracturing,the production of shale gas reservoir will decline rapidly.At present,refracturing is usually adopted to stabilize the production.Therefore,it is necessary to quantitatively evaluate the drainage volume of reservoir and optimize the parameters of refracturing,that is,to establish a reservoir evaluation method for refracturing in shale gas reservoir and optimize the relevant parameters to ensure the effect of refracturing.By introducing parameters such as refracturing time and flow coefficient,a fast marching method suitable for refracturing development effect evaluation is established,which can realize rapid and effective quantitative evaluation of the drainage volume of shale gas reservoir before and after refracturing,optimized the refracturing time.This method is used to study the effects of refracturing time and refracturing method on drainage volume.The results show that the second year after the initial fracturing,which has best application effect at the moment.The best refracturing method to improve the drainage volume of the reservoir is the temporary plugging in the fracture,and the effect of plugging the old fracture,fracturing the new fracture and refracturing old fracture is poor.The research results are of reference significance for the optimization design of refracturing in similar shale gas reservoirs.

关 键 词：波前快速推进法 储层动用体积 重复压裂 压裂时机 压裂方式 

分 类 号：TE37[石油与天然气工程—油气田开发工程]