江西弋阳盆地白垩系含油气系统特征  

Characteristics of Cretaceous Petroleum System in Yiyang Basin,Jiangxi Province

作　　者：周松源[1] 

机构地区：[1]中国石油天然气集团公司浙江石油勘探处,杭州市310013

出　　处：《新疆石油地质》2000年第2期116-119,共4页Xinjiang Petroleum Geology

摘　　要：弋阳盆地白垩系含油气系统以冷水坞组灰黑色泥岩为烃源岩，以Ⅱ型和Ⅰ型干酪根为主，有机质丰度较高，属 中等品质烃源岩，分布面积广，成熟度适中。生、排、聚时期主要为晚白垩世至今，排烃区主要集中在鹰潭凹陷和贵溪凹 陷。预测资源量 ０．８３２７ｘ１０~８－１．０８９９ｘ１０~８ ｔ．储集体主要为冷水坞组下段、上段砂岩和周家店组下段砂岩，盖层主要为冷水 坞组中段泥岩和周家店组上段泥岩，特别是周家店组泥岩，可作区域盖层。油气运移以纵向为主，主要借助于断裂和裂 缝。鹰潭凹陷和贵溪凹陷是主要的生油凹陷，也是勘探的主要目标。In Cretaceous petroleum system of Yiyang basin, the hydrocarbon source rock is grey--block mudstone of Iengshuiwu formation, which mostly contains kerogen Type Ⅰ and Ⅱ, higher abundance of organic matter, and belongs to a source rock of fair average quality with extensive distribution in area and medium maturity. Late Cretaceous to present are believed to be its periods of generation, expulsion (concentrated in Yingtan sag and Guixi sag) and accumulation of hydrocarbons. The amount of resources is estimated at 0.8327x10^8 t^1.0899x10^8 t. The reservoir bodies are mainly sandstones located in lower and upper Lengshuiwu formation and lower Zhoujiadian formation. The cap rocks are mudstone in middle Lengshuiwu formation and upper Zhoujiadian formation, and the latter, especially, can be as a regional cap rock. The hydrocarbon migration took place vertically and dominantly by the faults and fractures. This study showed that the two major source sags, Yingtan sag and Guixi sag will be prospecting targets for oil/gas exploration.

关 键 词：江西 白垩纪 含油气系统 油气勘探 

分 类 号：P618.130.2[天文地球—矿床学] P618.130.8[天文地球—地质学]