路井凹陷的构造特征与油气远景分析

20世纪80年代末，路井凹陷(又称麻木鸟苏凹陷)开始成为油气勘探的目标。1995年，在额1井首次获得工业油气流，证实该凹陷具备油气生成聚集条件。随后钻探额2井、额3井，均遭失败。为了探索该区下一步的勘探方向，本文从凹陷的构造和沉积演化着手，重点研究了该区的生油层、储层的沉积相带特征和有利的油气聚集带。中下侏罗统大山口群和白垩系麻木鸟苏组为该区主要生油岩系；下白垩统额济纳组为良好储层；燕山运动早期和中期形成的各类局部构造圈闭，均可能成为油气聚集场所；桃西低凸起、麻二号和麻三号构造带是有利的油气聚集带。本文认为该区展示了良好的油气远景。

Structural feature of Lujing depression and analysis of oil/gas prospect.

Late in the 1980's,Lujing depression (also called Mamuwusu depression ) became a target of oil/gas exploration.In 1995,the industrial oil/gas stream was first gained at well Er 1,which proved that the depression has the conditions of oil/gas generation and accumulation.But the succeeding drillings (Er 2 and Er 3) have lost.In order to explore the next exploration direction in the region,starting with the structural and sedimentary evolution of the depression,the paper centered on study of characteristics of oil generated strata,sedimentary facies of reservoir and favorable oil/gas accumulation area.Early Middle Jurassic Dashankou Group and Cretaceous Mamuwusu Group are main oil generated rock formation;Early Cretaceous Erjina Group is good reservoir;Early and Middle Yanshan Movement formed various local structural traps are capable of being oil/gas accumulated sites;Taoxi lower swell,Ma No.2 and Ma No. 3 structural belts are favorable oil/gas accumulation zones.The paper suggested that the region has good oil/gas prospect.