Based on self-made shale formation simulated artificial cores to evaluate water-based drilling fluids plugging effect technology  

作　　者：Yang Bai Chunyan Liu Guojun Li Ren Wang Dezhi Liu Pingya Luo 

机构地区：[1]State Key Laboratory Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,610500,China [2]CNPC Engineering Technology R&D Company Limited,Beijing,102206,China

出　　处：《Petroleum Research》2023年第1期11-17,共7页石油研究（英文）

基　　金：All work was supported by Open Fund(PLN201905)of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University);The Natural Science Foundation of China(No.51702270);PetroChina Innovation Foundation(No:2018D-5007-0604).

摘　　要：Plugging technology is one of the leading problems in shale gas drilling engineering,as it causes wellbore stability,shale formation collapse,and so on.In order to solve these problems,in this paper,we committed to preparing artificial cores whose original permeability was 1.16×10^(−4)mD,which could be used to simulate the shale formation,and established a sealing evaluation method to assess the effect of plugging technology by measuring permeability reduction rate K'.Verified the good reproducibility of the artificial cores through a lot of high temperature and high pressure(HTHP)filtration experiments.The Scanning electron microscopy(SEM)was used to prove that the permeability reduction rate is a scientific method to evaluate the sealing effect.

关 键 词：Plugging evaluation method Artificial cores REPRODUCIBILITY Permeability reduction rate 

分 类 号：TE254[石油与天然气工程—油气井工程]