Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Fault-Block Oil & Gas Field》 2018-03
Add to Favorite Get Latest Update

Characteristics and genesis of lacustrine massive fine-grained sedimentary rock:taking Eocene Jiyang Depression as an example

MA Fangxia;WANG Li;LUO Danting;ZHANG Yidan;GE Yunjin;DU Kefeng;Research Institute of Shaanxi Yanchang Petroleum(Group) Co.,Ltd.;School of Energy Resources,China University of Geosciences;  
There are few studies on lacustrine massive fine-grained sedimentary rock, and its characteristics and diagenesis mechanism are not yet clearly defined. Based on core observation of the lacustrine environment of the Jiyang Depression, Bohai Bay Basin, China, we distinguished 95 m massive fine-grained sedimentary rock from the 1,093 m core. Pollen and geochemistry data prove that the water reducibility and salinity of massive fine-grained sedimentary rock are lower than that of adjacent dark shales,and the climate was warmer and more humid. The connecting-well section shows that massive fine-grained sedimentary rock is in the distal part of deep-water gravity-driven sandstone units. Considering the characteristics of the bottom gentle erosion and abrupt changes, top truncation, the disorganized and chaotic distribution of internal mineral components, the Eocene massive fine-grained sedimentary rock in the Jiyang Depression is comprehensively judged as turbidity-end deposits. Warm and humid climate and high deposition rate are two main trigger mechanisms of massive fine-grained sedimentary rocks. Dilute turbidity can carry large amounts of plankton and deposit it in turbid mud, which can be used as a potential effective source rock.
【Fund】: 国家科技重大专项课题“陆相深水储集体成因与地质评价新方法”(2017ZX05009-002)
【CateGory Index】: P618.13
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved