高矿化度地层水对废弃气藏注CO_2埋存影响研究  

The influence research of carbon dioxide sequestration in the abandon gas reservoir due to the salinity formation water

作　　者：龚琦[1] 王彬[2] 华杰[3] GONG Qi WANG Bin HUA Jie(Southwest Petroleum Univesity , Chengdu Sichuan 610500, China Northeast Sichuan Gas Prodiction Plant, Sinopec Southwest Oil and Gas Branch, Langzhong Sichuan 637400, China Shu＇nan Gas-mine Field,Southwest Oil ＆ Gas Field Branch Company, China National Petroleum Corporation, Luzhou Sichuan 646000, China)

机构地区：[1]西南石油大学,四川成都610500 [2]中国石化西南油气分公司川东北采气厂,四川阆中637400 [3]中国石油西南油气田分公司蜀南气矿,四川泸州646000

出　　处：《石油化工应用》2017年第1期21-25,共5页Petrochemical Industry Application

基　　金：国家自然科学基金项目"高温高压CO2-原油-地层水三相相平衡溶解度规律";项目编号:51404037

摘　　要：本文开展了高矿化度地层水对废弃气藏注CO_2埋存影响研究。高矿化度气藏体系在生产中伴随着结盐颗粒和凝析液的产生,地层水蒸发促使体系液相重质化,凝析液量增加;矿化度抑制了凝析液量产生,矿化度越高,凝析液量越小。对于废弃高矿化度气藏,随着CO_2注入量增加,凝析液量减小,露点压力降低,反蒸发区域减小,液相密度减小。生产中,地层水矿化度越高,体系CO_2埋存量越小,注入CO_2加速了地层水蒸发,促使气相中水含量增加,体系结盐量增加。The paper carried out the research of high salinity formation water on the carbon dioxide sequestration in depletion gas reservoir.For high salinity gas reservoir, the salting out and the condensate liquid phenomenon would take place.The evaporation of formation water promote the liquid heaviness.Salinity inhibit the amount of condensate liquid.For high salinity depletion gas reservoir,with the increase of carbon dioxide injection rate,the amount of condensate gradually smaller,dew point pressure is reduced, the anti-evaporation area is reduced, the liquid density decreases.During the production,formation water salinity is higher,the smaller the amount of carbon dioxide sequestration,carbon dioxide accelerates the formation water evaporation,promote increased water vapor content, architecture salt increases.

关 键 词：高矿化度地层水 废弃气藏 CO2 埋存 

分 类 号：TE37[石油与天然气工程—油气田开发工程]