摘要
本文论述了中国陆相断陷—坳陷盆地油气藏形成的地质基础;从储油圈闭的成因出发,结合油气藏形态,把陆相盆地的油气藏划分为构造油气藏、地层岩性油气藏和特殊类型油气藏3大类8亚类20种类型。 断陷盆地中的油气田,往往在同一构造背景上由几十个至几百个独立的油气藏在不同层位迭加组合而成。这些油气藏的个体形态大小不同,成因各异,具有多油气藏类型,多储集类型,多压力系统和流体性质,分隔性强,差异性大,常成区(带)分布,称之为复式油气聚集区(带)。 复式油气聚集区(带)围绕生油凹陷呈环形展布,自外至内分为边缘凸起油气聚集区(带)、斜坡油气聚集区(带)、凹中背斜型油气聚集区(带),凹内地层岩性油气聚集区(带)。这些不同类型的油气聚集区(带)的油气藏,形成条件和油气藏序列各不相同。
<ABSTRACT> The article discusses the geological background of oil and gas accumulations in the continental faulted-depressed basins of China. As viewed from both origin of hydrocarbon traps and geometry of hydrocarbon accumulations, the oil and gas accumulations can be divided into 3 major types such as struc tural, stratigraphic and particular ones, as well as 8 sub-types and so on.
In faulted basins, a system of oil deposits is composed of severals or even hundreds of separate oil and gas accumulations superimposed of different horizons of the same Structural Setting, The hydrocarbon deposits have mtch differences according to their geometries and sizes, and are characterized by many types and pressure systems, anomalous fluids, separate anomalies and zonations, so they are known as combinad oil and gas accumulation areas or zones.
The combined oil and gas accumulation areas or zones, around an oil-gener ating depression, appear as ring type spreadings, i.e. many hydrocarbon accumu lation-belts such as marginal swellbelt, slope-belt, anticlinal belt of a depression center and stratigraphic-type belt, and are well-developed from outside to inside. The hydrocarbon accumulations situated on those belts, have all types and systems of hydrocarbon deposits.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
1989年第4期1-14,共14页
Petroleum Geology & Oilfield Development in Daqing
关键词
油气藏
类型
陆相盆地
油气聚集区
: category of oil accumulation, zone of oil and gas accumulation,nonmarine basin, Composite oil-gas province
