摘要
沉积有机质在生成油气及运移的过程中,部分可溶微量元素会分离出来,溶解在伴生的水中。油田水及原油中的可溶微量元素部分溶解于水,并随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阴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阴离子检测的实验研究表明:油田水中可溶态阴离子的主要以水载体进行运移,油田水向上运移的通道决定了可溶态阴离子在油气藏上方的异常形态及模式;可溶态阴离子对下伏地层的油气藏具有一定的指示意义。
During the formation of oil-gas and migration process,some soluble trace elements in the sedimentary organic matter will be separated and dissolved in the associated water.Some soluble trace elements in oilfield water and crude oil will dissolve in water and migrate with water to the near-surface place.Through analyzing variation of soluble anions in near-surface soil,we can track the oil-gas information underlying strata.A study of variation of near-surface soluble anions in the Xinchang gas field,Changde gas field and Pingfangwang oil field show that soluble anions in oilfield water mainly migrate in the form of water carriers,the upward migration passage of oilfield water determines the anomaly shape and pattern at the top of oil and gas reservoirs,and soluble anions have a certain indicating significance for oil and gas reservoirs in the underlying strata.
出处
《物探与化探》
CAS
CSCD
北大核心
2011年第2期198-202,共5页
Geophysical and Geochemical Exploration
基金
国家科技重大专项"大型油气田及煤层气开发"项目专题(2008ZX05020-06)
