东濮凹陷沙三段盐岩成因及含盐地层层序划分  

The salt rock genesis of 3^(rd) member of Shahejie formation in Dongpu Depression and the division of saline formation sequence

作　　者：赵俊峰[1,2] 纪友亮[1] 苏惠[3] 李星星[2] 蔺效勇[2] 

机构地区：[1]同济大学海洋与地球科学学院,上海200092 [2]中国石化中原石油勘探局测井公司,河南濮阳457001 [3]中国石化中原油田分公司勘探开发科学研究院,河南濮阳457001

出　　处：《海洋石油》2009年第1期9-14,37,共7页Offshore Oil

基　　金：国家"973"项目(G1999043304)资助:中国叠合盆地层序地层学及构造古地理研究

摘　　要：东濮凹陷沙三段高水位期沉积深灰色、暗色泥岩与少量重力流砂体,低水位期沉积盐岩、膏岩、低位三角洲与扇三角洲,从而形成纵向上深湖泥岩与蒸发岩、低位砂岩的频繁互层沉积。根据岩心资料、盐岩沉积序列特点及沙三段沉积期古气候和古环境特点,认为盐岩为浅水蒸发成因。深水相泥岩与浅水成因的盐岩频繁互层表明沙三段沉积期湖平面变化频繁。基于盐韵律特征划分准层序的方法,使得层序地层划分更为符合东濮凹陷含盐地层的实际情况。In 3^rd member of Shahejie formation in Dongpu Depression, deep grey and dark mudstone and a few gravity sandbodies developed in the highstand, and in the lowstand, salt rock, gypsum rock, lowstand deltas and fan deltas developed, as a result, deep lake mudstone are interbeded with evaporite and lowstand sandbodies. According to the core data, the characteristic of salt sedimentation., palaeoclimate and palaeoenvironments, salt rock is thought to be deposited in shallow water. The black mudstone deposited in deep water interbedded with salt deposited in shallow water shows that the lake level changes frequently during the sedimentation of 3^rd member of Shahejie formation. With the method of parasequences identification based on the the characteristic of salt cadence, the sequence division is accord with the practice in saline formation in Dongpu Depression.

关 键 词：东濮凹陷 浅水成盐 含盐地层 盐韵律 含盐地层层序 

分 类 号：TE121.3[石油与天然气工程—油气勘探]