Natural rubber latex as a potential additive for water-based drilling fluids  

作　　者：Jun Yang Guan-Cheng Jiang Jing-Tian Yi Yin-Bo He Li-Li Yang Teng-Fei Dong Guo-Shuai Wang 

机构地区：[1]College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China [2]National Engineering Research Center of Oil&Gas Drilling and Completion Technology,Beijing 102249,China [3]Changqing Drilling General Company,CNPC Chuanqing Drilling Engineering Company Limited,Xi'an 710021,Shaanxi,China

出　　处：《Petroleum Science》2024年第4期2677-2687,共11页石油科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.51991361 and Grant No.51874329)。

摘　　要：The environmental hazards and"carbon footprint"of oil and gas drilling can be significantly reduced by replacing traditional petroleum-based chemical additives with natural materials derived from plants and animals.This paper explored for the first time the interaction mechanism between natural rubber latex(NRL)and bentonite suspensions(BTs)through a series of characterization experiments,as well as the potential applications in water-based drilling fluids(WBDF).The gel viscoelasticity experiments showed that NRL could decrease the consistency coefficient(k)and flow index(n)of BTs,and enhance the shear thinning performance of BTs as pseudo-plastic fluids.In addition,0.5 w/v%NRL not only increased the critical yield stress and strengthened the structural strength between the bentonite particles,but also facilitated the compatibility of pressure loss and flow efficiency.The evaluation of colloidal stability and WBDF performance indicated that NRL particles could promote the hydration and charge stability on the surface of BTs particles,and optimize the particle size distribution and flow resistance of WBDF under the"intercalation-exfoliation-encapsulation"synergistic interaction.Moreover,NRL can improve the rheological properties of WBDF at high temperatures(<150.C),and form a dense blocking layer by bridging and sealing the pores and cracks of the filter cake,which ultimately reduces the permeability of the cake and the filtration loss of WBDF.

关 键 词：Natural materials Water-based drilling fluids Natural rubber latex Bentonite suspensions Filtration loss 

分 类 号：TE254.4[石油与天然气工程—油气井工程]