川东北飞仙关高含硫地层油基钻井液复合除硫技术  

Use of Compound Desulfurizing Agent in High Sulfur Feixianguan Formation Drilling in Northeast Sichuan with Oil Based Drilling Fluids

作　　者：肖金裕 周华安 暴丹 汪伟 杨兰平 江显俊 XIAO Jinyu;ZHOU Huaan;BAO Dan;WANG Wei;YANG Lanping;JIANG Xianjun(Drilling Fluid Technology Service Company of Chuanqing Drilling Engineering Company,Chongqing 400021;Drilling Fluid Technology Service Company of Chuanqing Drilling Engineering Company,Chendu,Sichuan 610056;School of Chemistry and Chemical Engineering,Chongqing University of Science and Technology,Chongqing 401331)

机构地区：[1]川庆钻探钻井液技术服务公司,重庆400021 [2]川庆钻探钻井液技术服务公司,成都610056 [3]重庆科技学院化学化工学院,重庆401331

出　　处：《钻井液与完井液》2024年第3期350-356,共7页Drilling Fluid & Completion Fluid

基　　金：川庆钻探工程有限公司科技攻关项目“川东北高含硫气藏钻井液抗硫及承压堵漏关键技术深化研究与试验”(CQ2021B-46-Z2-3)。

摘　　要：川东北地区飞仙关组气藏属于高含硫气藏~特高含硫气藏,针对川东北飞仙关高含硫气藏地质特点和钻井液技术难点分析,提出油基钻井液复合除硫技术对策。通过室内实验优选出除硫效果好的除硫剂,并进行了优选除硫剂复合配方优化研究和除硫剂高温老化除硫效果评价实验。研究表明,复合配方3%YT-3+3%CLC-2+3%JD-2的H_(2)S预防率高达99.14%,清除率达到100%,具有优良的除硫能力,复合配方中的锌基类除硫剂与钻井液中的H_(2)S反应生成稳定的难溶硫化物(ZnS),三嗪类除硫剂和醇醚酰胺类除硫剂主要通过物理和化学反应作用除硫,反应比较迅速,且不可逆,能够去除钻井液中的硫化氢,消除硫化氢对钻井液性能的影响和对钻具的腐蚀。该复合除硫技术在坡005-X4井和坡002-H5井飞仙关高含硫地层现场应用非常成功,在钻进过程中以及起下钻循环排后效期间地面均未检测到H_(2)S气体溢出,钻井液中S^(2−)含量始终监测为零,充分说明复合除硫技术除硫效果显著,能够满足高含硫井钻进的要求,为下川东高含硫气藏钻井工程除硫剂的优选提供良好借鉴。The Feixianguan gas reservoir in northeast Sichuan is a high to ultra-high sulfur content reservoir.Based on the analyses of the geology of the Feixianguan formation and the difficulties in drilling fluid operation,a desulfurization measure is presented for field operation with oil based drilling fluids.High performance desulphurizing agents are first selected through laboratory experiment,and studies on the compounding of these agents are conducted to develop a compound desulphurizing agent.Evaluation of the performance of the compound desulphurizing agent to remove sulfur at elevated temperatures shows that the compound desulphurizing agent containing 3%YT-3+3%CLC-2 and 3%JD-2 has percent H_(2)S prevention of 99.14%and percent H_(2)S removal of 100%.The zinc-based desulfurizing agent in the formula reacted with H_(2)S in the drilling fluids to produce insoluble chemical ZnS.The triazine and alcohol ether amide desulfurizing agents mainly remove H_(2)S through fast and irreversible physical and chemical reactions.This desulfurization technology has been successfully applied on the well Po-005-X4 and the well Po-002-H5 when drilled into the high sulfur content Feixianguan formation,no H_(2)S has been detected during drilling and during circulation after tripping for degassing,and the S^(2−)content of the drilling fluid is zero throughout the whole drilling operation.The successful field operation fully demonstrates that the technology has a significant desulfurization performance and can meet the requirements of drilling high sulfur wells.

关 键 词：飞仙关高含硫地层 除硫剂优选 复合除硫技术 

分 类 号：TE254.3[石油与天然气工程—油气井工程]