泡沫减重水泥浆体系及其微观孔隙分布  

Study on a Foam Lightweight Cement Slurry and the Distribution of Its Micro Pores

作　　者：任强 刘宁泽 罗文丽 高飞 刘景丽 刘岩 杨豫杭 程小伟[3] REN Qiang;LIU Ningze;LUO Wenli;GAO Fei;LIU Jingli;LIU Yan;YANG Yuhang;CHENG Xiaowei(Engineering Technology Research Institute,BHDC,Tianjin 300451;No.1 Cementing Company,BHDC,Renqiu,Hebei 062552;Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500)

机构地区：[1]中国石油集团渤海钻探工程公司工程技术研究院,天津300451 [2]中国石油集团渤海钻探工程公司第一固井分公司,河北任丘062552 [3]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500

出　　处：《钻井液与完井液》2023年第3期376-383,共8页Drilling Fluid & Completion Fluid

基　　金：渤海钻探工程有限公司重大研发项目“减重水泥浆体系关键技术研究与试验”(2022ZD03F)。

摘　　要：泡沫减重水泥浆体系对保障低压易漏地层井下生产安全至关重要。通过亲水链十四烷二酸甲酯、疏水链N,N-二甲基-1,3-二氨基丙烷及刚性链接单体二溴代联苯制备了耐高温高效发泡剂FPJ-S,并通过增黏型稳泡剂和协同型稳泡剂的优选复配得到了耐高温稳泡剂WPJ-S,基于FPJ-S和WPJ-S建立了泡沫减重水泥浆体系,并对其发泡能力及泡沫减重水泥石中的孔隙分布进行了分析。研究结果表明,相较于传统发泡剂,FPJ-S的发泡倍数提高了40%,1 h沉降距降低了58.8%;WPJ-S的稳泡能力和耐温能力均得以提升;建立的泡沫减重水泥浆体系在0.90~1.60 g/cm^(3)下密度可调,浆体沉降稳定性较好,并且不同密度泡沫减重水泥石的24 h抗压强度均大于3 MPa;基于压汞法及工业CT(XCT)技术表征可知,该泡沫减重水泥石的孔隙分布均匀,形态较为规则完整,且未发现大量联通孔。Foam lightweight cement slurry is very important to the safety of downhole operation in low-pressure easy-to-leak formation drilling.A high temperature high efficiency foaming agent FPJ-S has been developed to formulate lightweight cement slurries.FPJ-S is prepared from the hydrophilic tetradecanedioic acid methyl ester,the hydrophobic N,N-dimethyl-1,3-diamino propane and a rigid linking monomer 2,2’-dibromobiphenyl.A high temperature foam stabilizer,WPJ-S,was developed with the FPJ-S,a viscosifying foam stabilizer and a synergistic foam stabilizer.A foam lightweight cement slurry was formulated with WPJ-S and experiments were conducted to study the foaming capacity of the FPJ-S and the WPJ-S,as well as the distribution of pores in the set foam cement.The study results show that compared with conventional foaming agents,the foaming capacity of the FPJ-S is increased by 40%,the 1-hour settling distance is reduced by 58.8%.The foam stabilizing capacity and temperature tolerance of the WPJ-S is superior to the conventional foam stabilizers.The density of the foam lightweight cement slurry formulated can be adjusted between 0.90 g/cm^(3) and 1.6 g/cm^(3).The cement slurry has good settlement stabilization,and the 24-hour compressive strengths of the cement slurries of different densities are all greater than 3 MPa.Technical characterization based on mercury intrusion method and industry CT(XCT)shows that the foam lightweight cement slurry has pores that are uniformly distributed inside the set cement,and the set cement has regular morphology,and no large number of connecting holes are found in the set cement.

关 键 词：发泡剂 稳泡剂 泡沫水泥 孔隙分布 

分 类 号：TE256[石油与天然气工程—油气井工程]