PDDA/无机纳米颗粒交替吸附沉积及提高钻井井壁稳定性  

Alternating adsorption and deposition of PDDA/inorganic nanoparticles and stability improvement of drilling wellbore

作　　者：刘振东[1,2] 李海斌[2] 徐海[1] 李公让[2] 吕建仁 LIU Zhendong;LI Haibin;XU Hai;LI Gongrang;LV Jianren(China University of Petroleum(East China),Qingdao 266580,China;Sinopec Shengli Petroleum Engineering Co.,Ltd.,Drilling Fluid Technology Service Center,Dongying 257000,China)

机构地区：[1]中国石油大学(华东),山东青岛266580 [2]中国石化胜利石油工程有限公司钻井液技术服务中心,山东东营257000

出　　处：《石油化工》2025年第2期227-232,共6页Petrochemical Technology

基　　金：国家科技重大专项“大型油气田及煤层气开发”课题五“致密油气开发环境保护技术集成及关键装备”(2016ZX05040005)。

摘　　要：由贻贝等生物体外壳得到启示,采用带有相反电荷的聚合物和纳米无机颗粒相互吸引逐层成膜,模拟生物矿化的过程,研究了不同形式的纳米CaCO3与聚二烯丙基二甲基氯化铵(PDDA)聚电解质矿化沉积形成沉积膜的性能,并模拟评价了沉积膜对岩石表面的封堵加固作用效果。实验结果表明,纳米CaCO3和PDDA形成的沉积膜具有很好的光滑表面和黏附性,能够有效提高岩石表面的致密性,对提高井壁加固具有一定的作用,这对该技术在钻井领域的应用展示了较好的前景。According to inspiration from the shells of organisms such as mussels,polymers with opposite charges and nano inorganic particles were used to attract each other layer by layer to form afilm and simulate the process of biomineralization.The performance of different forms of nano CaCO3 and poly(dimethyl diallyl ammonium chloride)(PDDA)polyelectrolyte mineralization deposition to form sedimentaryfilms was studied.The sealing and reinforcement effect of sedimentaryfilms on rock surfaces was simulated and evaluated.The experimental results show that the sedimentaryfilm formed by nano CaCO3 and PDDA has a good smooth surface and adhesion,which can effectively improve the density of the rock surface and have a certain effect on improving wellbore reinforcement.This demonstrates a good prospect for the application of this technology in the drillingfield.

关 键 词：聚电解质 无机颗粒 矿化沉积 加固效果 井壁稳定 

分 类 号：TE256[石油与天然气工程—油气井工程]