石油与天然气地质 ›› 1983, Vol. 4 ›› Issue (4): 395-402.doi: 10.11743/ogg19830407

• 论文 • 上一篇    下一篇

江汉盆地早始新世沉积环境及与油气关系

袁炳存1, 陈荣书1, 万静萍1, 蔡樨芬1, 刘安林2, 翟才宇2   

  1. 1. 武汉地质学院;
    2. 江汉石油管理局勘探开发研究院
  • 收稿日期:1982-05-13 出版日期:1983-12-25 发布日期:2012-01-16

EARLY EOCENE SEDIMENTARY ENVIRONMENT OF JIANGHAN BASIN AND ITS OIL AND GAS POTENTIAL

Yuan Bingcun1, Chen Rongshu1, Wan Jingping1, Cai Xifen1, Liu Anlin2, Zhai Caiyu2   

  1. 1. Wuhan College of Geology;
    2. Research Institute of Petroleum Exploration and Development, Jianghan Petroleum Administration
  • Received:1982-05-13 Online:1983-12-25 Published:2012-01-16

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摘要：

江汉盆地为燕山运动后发展起来的中、新生代内陆盆地。面积约28,000平方公里。自垩纪到第四纪沉积总厚达万米左右。以早第三纪沉积最为发育,可分两个成油、成盐旋回(表1)。本文讨论新沟咀组下段"上组合"(包括泥隔层、Ⅱ油组、Ⅰ油组和大膏层)的沉积环境及其与油气的关系。

Abstract:

In the early Eocene,Jianghan Basin was a shallow saline lake fed by rivers.Three types of sands were formed within this lake: deltaic sands,nearshore beach sands and offshore beach sands.Among them,the more important are Hougang deltaic sands which are composite,overlapped ones,and which were developed during the desalinating period.The principle features of the saline lacustrine and deltaic sediments are the antithetic and complementary to each other.Because of slight subsiding,lower rate of sedimentation,shallow water body and higher salinity at earlier Eocene,the basin studied was not favorable for organism breeding.Therefore,the abundance of organic matters in the basin was poor,with sapropel predominantion,and conditions for oil generation was less favorable.Though sands exist in this lacustrine basin which are favorable for oil accumulation,oil and gas reservoirs could be rarely formed.It seems that the potential region for searching small oil and gas fields might be to the cast where offshore lacustrine beach sands exist,and to the west where front deltaic sands exist.