| 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。 |
| 关键词: H2S 油基钻井液 评价方法 除硫剂 复合除硫体系 |
| DOI：10.3969/j.issn.1007-3426.2023.04.011 |
| 分类号: |
| 基金项目: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) |
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| Optimization experiment of efficient hydrogen sulfide removal system for oil-based drilling fluid |
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Bao Dan1,2, Zhou Huaan3, Liu Siyuan1,2, Feng Xuerong3, Huang Wenzhang1,2, Xiao Jinyu3, Lu Hao1,2
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1. Chongqing University of Science and Technology, Chongqing, China;2. Chongqing Oil and Gas Field Chemical Engineering Technology Research Center, Chongqing, China;3. CCDC Drilling Fluid Technology Service Co., Ltd., Chengdu, Sichuan, China
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| Abstract: |
| 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 H2S concentration of the contaminated oil-based drilling fluid was 0.078 mg/L after high temperature aging, and the H2S concentration was 0 mg/L after adding the compound sulfur removal system, and the sulfur removal rate reached 100%. Conclusion sThe 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. |
| Key words: hydrogen sulfide oil-based drilling fluid evaluation method hydrogen sulfide remover compound sulfur removal system |
