洞庭盆地第四系生物气地质特征及远景分析

黄泽新; 罗小平

doi:10.11743/ogg19960112

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洞庭盆地第四系生物气地质特征及远景分析
GEOLOGICAL CHARACTERISTICS OF QUATERNARY BIOGAS IN DONGTING BASIN AND ITS PROSPECTS
1996年17卷第1期页码：62-67
网络首发：1996-03-25，

纸质出版：1996
DOI： 10.11743/ogg19960112
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黄泽新, 罗小平. 洞庭盆地第四系生物气地质特征及远景分析[J]. 石油与天然气地质, 1996,17(1):62-67. DOI： 10.11743/ogg19960112.

Huang Zexin, Luo Xiaoping. GEOLOGICAL CHARACTERISTICS OF QUATERNARY BIOGAS IN DONGTING BASIN AND ITS PROSPECTS[J]. 1996, 17(1): 62-67. DOI： 10.11743/ogg19960112.

摘要

洞庭盆地面积约1.5×10

是在元古代基底的基础上发育而成的中新生代断陷盆地。在新构造运动的影响下

几度沉降接受了厚达100～334m的第四系沉积。在洞庭湖区

普遍见生物气显示。生物气的聚集主要受控于气源条件及储集条件。富含有机质的暗色沉积物是良好的气源层

砂、砂砾层是生物气主要聚集场所。全新统上部的粘土或砂质粘土为区域性的良好盖层。肖家湾-鸭子港区及三仙湖-茶盘洲区是洞庭盆地第四系生物气勘探的有利区域。

Abstract

Dongting Basin

covering an area of 1.5×10

is a Meso-Cenozoic fault-depressedbasin developed on the basement of the Proterozoic.It subsided several times and received 100～334 m thick Quaternary sediments under the influence of neotectonic movement. Biogasshowing could be seen very often. The accumulation of the biogas is primarily controlled bygas source and reservoir conditions. The organic-rich dark sediments are good source beds;sand beds and gravel beds are major places for biogas accumulation

the clay and sand claybeds of the upper part of the Proterozoic are fine regional cap beds.It is suggested thatXiaojiawan-Yazigang and Sanxianhu-Chapanzhou regions are favourable for Quaternary biogas exploration of the basin.