Carbonate Gas Reservoirs Damage Mechanism of Interaction among Rock Interface Acidic Gas and Alkalinity Fluids
- 作者：LIU Da-weiKANG Yi-li
- 会议时间：2007-10-20
- 关键词：碳酸盐岩气藏 ; 岩石界面 ; 破坏机理 ; 酸性气体 ; 流体碱度
- 作者单位：State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,Sichuan,P R of China
- 母体文献：2007年油气藏地质及开发工程国家重点实验室第四次国际学术会议论文集
- 会议名称：2007年油气藏地质及开发工程国家重点实验室第四次国际学术会议
- 会议地点：成都
- 主办单位：中国石油学会
- 语种：chi
摘要
Paper developed fluid sensitive experiments basing on the cores of carbonate reservoir with high content H2S and CO2 gas in Kazakhstan Zhanazhol, middle and northeast parts of Sichuan Basin of China. Results show there is certain level fluids sensitivity in cores, and alkali sensitivity is the most serious. Petrography analysis that dolomite, calcite, microcrystalline quartz, gypsum, illite, CaS, asphalt are common in the study area carbonate reservoir. Alkali working fluids intrude into reservoir, change reservoir original acidic environment. Alkali working fluids consumption of acidic and destruction rock interface, resulting more sensitive mineral exposure and physical and chemical changes occur, which cause more serious formation damage. Alkali fluids intrusive, cause sulfur deposition. Based on such formation damage mechanism, the article says to vigorously develop technology of temporary shielding.