近地表土壤中可溶态阳离子的石油地质意义  

Petroleum Geological Significance of Soluble Cation in Near-surface Soil

作　　者：李广之[1] 陈银节[2] 尹红军[1] 宣海波[1] 

机构地区：[1]中国石化集团资产经营管理有限公司合肥培训测试中心,安徽合肥230022 [2]中国石化勘探开发研究院无锡实验地质研究所,江苏无锡214151

出　　处：《天然气地球科学》2011年第2期201-205,共5页Natural Gas Geoscience

基　　金：国家油气重大专项"大型油气田勘探开发遥感与化探配套技术"课题(编号:2008ZX0520-06)资助

摘　　要：沉积有机质在生成油气及运移的过程中,原油中的部分可溶微量元素会分离出来溶解在伴生的水中,与油田水一起运移至近地表。通过一定技术手段分析近地表土壤中的可溶态阳离子的含量变化特征,就可以追踪下伏对应地层的含油气信息。通过对新场气田、昌德气田、平方王油田上方近地表土壤中的可溶态阳离子检测的实验研究表明:油田水中可溶态阳离子主要以水为载体进行运移,油田水向上运移的通道决定了可溶态阳离子在油气藏上方的异常形态及模式;可溶态阳离子对下伏地层的油气藏具有一定的指示意义。During the formation and migration of oil and gas,some soluble microelements had been separated and dissolved in the associated water.Dissolved microelements in oilfield water and crude oil could migrate with water to the near-surface.So we can track the oil-gas information underlying strata by analyzing variations of soluble cations in near-surface soil.Study on variations of near-surface soluble cations in the Xinchang gas field,Changde gas field and Pingfangwang oil field shows that： Soluble cations in oilfield water mainly migrate by the water carriers;the upward migration passage of oilfield water determines the abnormity shape and pattern of soluble cations at the top of oil and gas reservoirs;and variations of soluble cations have a certain meaning of the instructions of the oil and gas reservoirs on the underlying strata.

关 键 词：有机质 近地表土壤 微量元素 可溶态阳离子 石油地质意义 

分 类 号：TE122.1[石油与天然气工程—油气勘探]