油基钻井液高效除硫体系优化实验  

Optimization experiment of efficient hydrogen sulfide removal system for oil-based drilling fluid

作　　者：暴丹 周华安 刘思源 冯学荣 黄文章[1,2] 肖金裕 卢浩 Bao Dan;Zhou Huaan;Liu Siyuan;Feng Xuerong;Huang Wenzhang;Xiao Jinyu;Lu Hao(Chongqing University of Science and Technology,Chongqing,China;Chongqing Oil and Gas Field Chemical Engineering Technology Research Center,Chongqing,China;CCDC Drilling Fluid Technology Service Co.,Ltd.,Chengdu,Sichuan,China)

机构地区：[1]重庆科技学院 [2]重庆市油气田化学工程技术研究中心 [3]中国石油集团川庆钻探工程有限公司钻井液技术服务公司

出　　处：《石油与天然气化工》2023年第4期66-72,共7页Chemical engineering of oil & gas

基　　金：重庆市自然科学基金面上项目“页岩地层基于热致液-固相变原理的堵漏颗粒原位自生成型及其自适应封堵调控机制”(CSTB2022NSCQ-MSX1554);重庆市教委科学技术研究项目“页岩地层致密承压封堵机理与温敏智能型堵漏剂研发”(KJQN202101548);重庆科技学院科研资助项目“热致形状记忆智能型堵漏剂的研制及自适应封堵作用机理”(ckrc2021030)。

摘　　要：目的解决川东北含硫气藏在钻井过程中存在的H2S污染油基钻井液、H2S溢出造成的安全风险问题。方法建立了H2S污染油基钻井液室内评价方法和评价参数,优选了油基钻井液用高效除硫剂和复合除硫体系配方。结果除硫效果优异的单剂为液体除硫剂YT-1、碱式碳酸锌JD-2、醇醚酰胺CLC,饱和度分别为56.48 mg/g、21.13 mg/g、5.8 mg/g,高温老化除硫率分别为90.10%、82.60%和75.23%,与油基钻井液配伍性良好。优化形成的复合除硫体系配方4%(w)YT-1+2%(w)JD-2,在质量浓度为75 mg/L的H2S污染油基钻井液后,出口质量浓度达到0.015 mg/L所用时间仅为1.21 min,加入复合除硫体系后,该时间则达到171.8 min。污染后的油基钻井液高温老化后H2S质量浓度为0.078 mg/L,加入复合除硫体系后,H2S质量浓度为0 mg/L,除硫率达100%。结论除硫单剂协同作用提高除硫效果,为川东北地区高含硫地层“安全、高效”钻井提供了技术保障。Objective The sulfur remover suitable for oil-based drilling fluid was studied to solve the problems,such as pollution of oil-based drilling fluid by hydrogen sulfide and safety risk caused by hydrogen sulfide overflow in the drilling process of sulfur-bearing gas reservoir in northeastern Sichuan.Methods The evaluation method and parameters of oil-based drilling fluid contaminated by hydrogen sulfide were established.The formulation of high efficiency sulfur removal agent and compound sulfur removal system for oil-based drilling fluid were optimized.Results The single agents with excellent sulfur removal effect were liquid sulfur removal agent YT-1,zinc carbonate basic JD-2 and alcohol ether amide CLC,with the saturation of 56.48 mg/g,21.13 mg/g and 5.8 mg/g,respectively,the high temperature aging sulfur removal rates of 90.10%,82.60%and 75.23%,and they showed good compatibility with oil-based drilling fluid.The compound sulfur removal system formulation of 4%YT-1+2%JD-2 was optimized.For the 75 mg/L hydrogen sulfide contaminated oil-base drilling fluid,the time to reach the outlet concentration of 0.015 mg/L was only 1.21 min,which reached 171.8 min after adding the compound sulfur removal system.The H 2S concentration of the contaminated oil-based drilling fluid was 0.078 mg/L after high temperature aging,and the H 2S concentration was 0 mg/L after adding the compound sulfur removal system,and the sulfur removal rate reached 100%.Conclusions The single agent of sulfur removal can improve the sulfur removal effect,providing technical support for the safe and efficient drilling in the high sulfur formation in northeastern Sichuan.

关 键 词：H2S 油基钻井液 评价方法 除硫剂 复合除硫体系 

分 类 号：TE254[石油与天然气工程—油气井工程]