惠民凹陷孔店组—沙四段“膏盐岩”层沉积机理——以MS1井“膏盐岩”层分析为例  

Sedimentation mechanism of "gypsum rock" in Kongdian Formation and Sha 4 Member of Shahejie Formation in Huimin Sag—With the "gypsum rock" of Well MS1 as an example

作　　者：岳志鹏[1] 曾俊[1] 高志卫[2] 刘玉亮[2] 

机构地区：[1]滇黔桂石油勘探局第一钻探公司 [2]中国石化胜利油田临盘采油厂地质研究所

出　　处：《石油勘探与开发》2006年第5期591-595,共5页Petroleum Exploration and Development

基　　金：中国石化胜利油田分公司勘探事业部"惠民凹陷孔店组生烃潜力综合研究"子项目

摘　　要：以MS1井现场实钻录井资料为依据,结合研究区构造、沉积发育史分析,引入“沉积分异作用”、“混合沉积作用”及物源区与沉积区“岩石倒序规律”,对惠民凹陷孔一段—沙四段的“膏盐岩”层的物源进行了反序追踪对比。孔一段—沙四段的“膏盐岩”层段并非传统意义上的“石膏”层,而是物理、化学共同作用形成的湖盆化学盐类与砂岩的混合沉积,是邻近凸起下古生界碳酸盐岩风化剥蚀后提供物源及气候干旱导致湖盆收缩共同作用的结果,其准确定名应该为“含膏质粉、细砂岩”。Based on the in-situ log data of Well MS1 and the analyses of the structure and depositional history of the study area, ＂sedimentary differentiation＂, ＂ hybrid sedimentation＂ and the ＂ regularity of the reversed rocks＂ in source and sedimentation areas are introduced to track and compare the source materials of the ＂gypsum rock＂ layers of Kongdian Formation and Sha 4 Member in Huimin Sag. Different from the conventional gypsum layer, the layers are the hybrid sediment of sandstones and the lake-basin chemical salts formed by physical and chemical actions. They are the result of the combination of the source supplied by the salient Lower Paleozoic carbonate mass which experienced weathering and the shrinking of the lake basin caused by drought. The exact nomenclature for it should be ＂fine sandstone with gypsum silt＂.

关 键 词：惠民凹陷 膏盐岩 构造分析 沉积分异作用 混合沉积作用 岩石倒序规律 

分 类 号：TE121.32[石油与天然气工程—油气勘探]