摘要
地层水是与油气共存的地下水,它与油气的生成、运移、聚集和成藏有着十分重要的联系。在整理分析中扬子地区地层水化学资料的基础上,统计分析了各储层地层水的矿化度,计算了水化学特征系数,包括变质系数、脱硫系数等。认为中扬子区纵向上下组合地层水属于交替阻滞和交替停滞带,油气保存较好;上组合地层水大多属于自由交替带和交替阻滞带,油气保存较差。该区块中鄂西渝东区有利于油气保存,其次是江汉平原区,湘鄂西区最差,总的来说鄂西渝东是最有利的勘探区域。
Formation water is the groundwater that coexists with oil and gas and has important relation with hydrcarbon generation, migration and accumulation. Based on chemical analysis of formation water in the middle Yangtze region, the statistical analysis of reservoirs formation water salinity has been carried out, the water chemical characteristics factor, including metamorphic coefficient, desulfurization coefficient, etc have been calculated. The analysis results show the formation water in the middle Yangtze region is in alternating block and alternate stagnation zone, and oil and gas is preserved well. Combination of the formation water mostly belongs to the free exchange zone and alternate block belt, but the oil and gas is poorly preserved. The area in the block near eastern Chongqing and western Hubei is the most favorable for oil-gas preservation, followed by Jianghan plain, and the area western Hunan is the worst.
出处
《石油地质与工程》
CAS
2012年第5期35-38,158,共4页
Petroleum Geology and Engineering
基金
中国地质调查局项目课题资助(1212011120967-08)
关键词
中扬子地区
地层水
油气保存
Middle Yangtze region
formation water
hydrocarbon preservation
