Optimizing the Diameter of Plugging Balls in Deep Shale Gas Wells  

作　　者：Yi Song Zheyu Hu Cheng Shen Lan Ren Xingwu Guo Ran Lin Kun Wang Zhiyong Zhao 

机构地区：[1]Shale Gas Research Institute,PetroChina Southwest Oil&Gasfield Company,Chengdu,610056,China [2]State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,610500,China [3]National Pipe Network Group Sichuan East Natural Gas Transmission Pipeline Co.,Ltd.,Wuhan,430205,China [4]Fracturing Acidizing Company,Downhole Operation Company of Chuanqing Drilling Engineering Co.,Ltd.,Chengdu,610213,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第3期609-624,共16页流体力学与材料加工（英文）

基　　金：supported by the National Natural Science Foundation of China (No.U21B2071).

摘　　要：Deep shale gas reserves that have been fractured typically have many relatively close perforation holes. Due to theproximity of each fracture during the formation of the fracture network, there is significant stress interference,which results in uneven fracture propagation. It is common practice to use “balls” to temporarily plug fractureopenings in order to lessen liquid intake and achieve uniform propagation in each cluster. In this study, a diameteroptimization model is introduced for these plugging balls based on a multi-cluster fracture propagationmodel and a perforation dynamic abrasion model. This approach relies on proper consideration of the multiphasenature of the considered problem and the interaction force between the involved fluid and solid phases. Accordingly,it can take into account the behavior of the gradually changing hole diameter due to proppant continuousperforation erosion. Moreover, it can provide useful information about the fluid-dynamic behavior of the consideredsystem before and after plugging. It is shown that when the diameter of the temporary plugging ball is1.2 times that of the perforation hole, the perforation holes of each cluster can be effectively blocked.

关 键 词：Deep shale gas fracture propagation fluid mechanics fluid-solid coupling perforation hole abrasion 

分 类 号：TE371[石油与天然气工程—油气田开发工程]