The Identification of an Alkaline Salt Lake:A Case Study from the Permian Fengcheng Formation in Hashan-Wuxia Area

The study area is located in the northwest of Junggar basin which was in the relaxation stage of foreland basin accompanied by momentary extend volcanic activities when the Fengcheng Formation developed in early

陆相页岩气形成条件及勘探开发潜力——以川东涪陵北地区侏罗系东岳庙段为例

陆相泥页岩是页岩气勘探开发的重要接替领域。利用四川盆地涪陵北地区最新钻井(FY10井)资料及大量样品的分析测试结果,从页岩矿物组成、有机地球化学特征、储集特征、含气性等方面研究了侏罗系自流井组东岳庙段页岩气形成条件与勘探潜力。研究结果表明:研究区东岳庙段一亚段优质页岩厚度大于20 m,有机质含量较高(TOC为1.31%~4.04%,平均值大于1.5%),有机质类型以Ⅱ型为主,有机质已进入高成熟演化阶段;页岩中无机矿物孔与有机质孔均较发育,平均孔隙度大于4%,储集性能好;岩心浸水实验显示气泡密集、持续性好,页岩气形成与富集条件好;东岳庙段整体埋藏深度适中,页岩中发育大量灰质介壳纹层,有利于增强压裂改造效果,因此具备良好的页岩气勘探开发潜力。