摘要
位于塔里木盆地东部英吉苏中生界坳陷龙 2号构造上的华英参 1井在三叠系获得少量油气流。原油的地下相态、成藏条件及油气藏规模引起普遍关注。文章综合应用地质录井、罐顶气组分色谱、气体成分统计、轻质原油地下相态判别、油气地化特征、完井测试等六类资料综合分析研究了华英参 1井所发现的油气在三叠系深层的地下相态 ;通过各项石油地质条件的综合分析 ,论证了龙 2号构造的成藏条件并对该构造的油气资源规模进行了预测 ;利用天然气运聚动平衡原理解释了三叠系盖层质量较差但龙 2号构造仍然存在天然气藏的地质现象。各种资料显示 ,华英参 1井三叠系下储集层段顶部是凝析气层 ,龙 2号构造可能是一个含凝析气藏的构造 ;该构造气源足、圈闭大、气藏灌满程度高 ,具有良好的勘探前景。
A little oil and gas were found in Triassic in the stratigraphic well Huaying 1 on Long No.2 structure in Yingjisu Mesozoic Depression of Eastern Talimu Basin.The subsurface phase behavior of crude oil,reservoir formation conditions and the scale of the oil & gas reservoir have been followed with great interest.In the paper,the subsurface phase behavior of the oil and gas found in Triassic in the stratigraphinc well Huaying 1 is comprehensively studied by use of six kinds of data as geological logging,head space gas chromatography,gas component statistics,judgement on the subsurface phase behavior of light crude oil,hydrocarbon geochemical characteristics and well completing test,etc.;through synthetically analyzing various petroleum geological conditions,the reservoir formation condition of Long No.2 structure is expounded and the hydrocarbon resource extent in the structure is predicted;and the geological phenomenon of why the Triassic gas reservoir was found in Long No.2 structure with a relatively bad caprock is explained by use of the dynamic balance theory about natural gas migration and accumulation.It is shown by various data that the top of the lower reservoir interval of Triassic in the stratigraphic well Huaying 1 is a condensate gas reservoir and the Long No.2 structure may be a condensate gas bearing structure with a sufficient gas source,a large trap and a high gas fill factor,being of a good exploration potential.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2001年第1期23-30,共8页
Natural Gas Industry
关键词
塔里木盆地
英吉苏坳陷
三叠系
凝析油气藏
预测
Talimu Basin,East,Yingjisu Depression,Triassic Period,Deep zone,Condensate field
