东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

钻井过程中硫化氢侵入井筒后的赋存状态研究

ISSN号：1001-0890
期刊名称：石油钻探技术
时间：2013.11.25
页码：29-33
分类：TE28[石油与天然气工程—油气井工程]
作者机构：[1]油气资源与探测国家重点实验室中国石油大学(北京),北京102249, [2]重庆科技学院石油与天然气工程学院,重庆401331
相关基金：基金项目：国家重点研究发展计划（“973”计划）项目“深井复杂地层高效安全钻井基础研究”（编号：2010CB226704）、国家自然科学基金重点项目“超临界二氧化碳在非常规油气藏中应用的基础研究”（编号：51034007）资助.
相关项目：超临界二氧化碳在非常规油气藏中应用的基础研究

关键词：钻井, 硫化氢, 井筒, 赋存, 钻井液, 溶解, drilling, hydrogen sulfide, well bore, occurrence , drilling fluid, solubility

中文摘要：

当钻遇高含硫气藏时，如果不及时检测硫化氢，极易因硫化氢侵入地面而带来井控风险，造成财产损失甚至危及人身安全。针对该问题，结合普光气田的工程实际，通过数值计算，对硫化氢侵入井筒后与钻井液之间的物理化学作用进行分析，得到了硫化氢与钻井液之间溶解和化学反应的影响规律。分析表明：进入井筒后，一部分硫化氢以气态形式滑脱上升，另一部分溶于钻井液中与钻井液反应、溶解；温度升高硫化氢的溶解度降低，压力增大硫化氢的溶解度变大，且压力对溶解度的影响程度远大于温度对溶解度的影响；由于温度和压力变化对溶解度的影响，上部井段钻井液中的硫化氢浓度比下部井段高；H2S与钻井液发生化学反应并发生化学溶解，钻井液的pH值对H2S的吸收有很大影响；在硫化氢检测中，同时对钻井液里的孽一和H2S进行测量会取得更好的效果。

英文摘要：

There may be an accident or a disaster if we could not detect hydrogen sulfide（H2S） in a timely manner while drilling. Once pressure in the wellbore is not under control, hydrogen sulfide release to surface will cause property losses or even personnel safety accident. According to the engineering practices of Puguang gas reservoir in northeast Sichuan, this paper analyzed the physical and chemical effects after H2S invasion by numerical calculation, the influence of dissolution and chemical reaction between H2 S and drilling fluid had been found. The analysis results showed that：after entering into wellbore, one part of H2 S would rise to the top of the wellbore, the other part would have chemical reaction with and dissolve in drill- ing fluid;the solubility of H2 S reduced with increase of temperature, and increased as the pressure rose;and the influence of pressure on its solubility was much larger than that of temperature. The concentration of H2 S in the upper wellbore was much higher than the lower wellbore due to the effects of pressure and tem- perature. The drilling fluid pH value had a great impact on the absorption of H2 S, since H2S reacted with drilling fluid. Measuring the concentration of S2- and H2 S in the drilling fluid at the same time could detect H2 S more accurately and in a more timely manner.

同期刊论文项目