高含硫气田开发过程中H_2S含量变化规律  

Variation laws of H_2S concentration in the development process of sour gas reservoir

作　　者：李云波[1] 李相方[1] 姚约东[1] 刘一江[2] 曾大乾[2] 李开鸿[3] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]中国石化中原油田普光气田指挥部,四川达州635000 [3]中国石油西南油气田分公司蜀南气矿,四川泸州646000

出　　处：《石油学报》2007年第6期99-102,共4页Acta Petrolei Sinica

基　　金：国家重点基础研究发展规划(973)项目(2001CB209108)资助

摘　　要：对流体相平衡及高温高压下H2S气体在水中溶解度的实验研究表明,在高含硫气田开发过程中,H2S含量增加缘于原始地层水中所溶解的H2S气体在地层压力降低后部分脱附而进入地层气相中。基于H2S气体在水中溶解度实验数据和物质平衡方法,建立了高含硫气田H2S气体含量长期变化规律模型。对H2S含量变化规律进行的敏感性分析结果表明:在高含硫气田开发早期,产出气体中H2S含量增加较为缓慢,在气田进入开发的中后期时,H2S含量增加速度不断加大。同时,地层原始含水饱和度对H2S含量增加的影响较大。在同样条件下,原始含水饱和度高的气藏其H2S含量增加速度更快。The experiment study of H2 S solubility in water under high pressure and high temperature showed that the concentration of H2S increased in the development of sour gas reservoir, because of the resolution of H2S from the connate water while formation pressure dropping. On the basis of high-pressure and high-temperature experiment of H2S solubility in water and material balance analysis, a forecast model for the variation of H2 S concentration was established. The sensitive analysis of variation of H2 S concentra- tion indicated that H2S concentration increased slowly in the early stage, and H2S concentration accelerated in the middle or later stage of development of sour gas reservoir. Under the same conditions, H2 S concentration of sour gas reservoir with high initial water saturation increased quickly.

关 键 词：高含硫气田 H2S含量 地层水 溶解度 预测模型 

分 类 号：TE349[石油与天然气工程—油气田开发工程]