摘要
东营凹陷油气丰富 ,发育了古近系沙河街组三段、四段两套有效烃源岩。根据烃源岩及原油的地球化学特征分析 ,探讨凹陷内各油田的石油来源。将东营凹陷已发现石油划分为沙三型、沙四型及混合型 ,认为 :南斜坡地区原油主要来源于沙四段烃源岩 ,凹陷中部及北部油田的原油主要源于沙三段或为沙三段、沙四段的混源油 ;凹陷周边油田的原油大多数来源于沙四上亚段烃源岩 ,大致呈环状分布于凹陷边部 ;凹陷中部油田的原油以沙三型为主。各供油洼陷生成的油气就近运移聚集 ,油气环绕生油洼陷呈环带状分布。图 4表 1参
The Dongying Sag, which has two sets of source rocks including the fourth member (Es 4 ) and the third member (Es 3 ) of Shahejie Formation, is abundant in hydrocarbon. By analyzing the geochemical features, the oil sources of all oil pools in the sag are investigated, and divided into three types of sources: the Es 3 type, the Es 4 type and the mixed type,suggesting that the crude oils in the south slope mainly generated from the Es 4 source rocks, those in the central and the northern pools mainly generated from the Es 3 or from the mixture of the Es 3 and the Es 4 source rocks, those in the central area mainly belong to the Es 3 type, and those in the marginal pools distributed annularly around the sag mainly generated from the upper sub member of Es 4 source rocks. The hydrocarbons derived from the sub sags migrated and accumulated nearby, and are distributed round the sub sags.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2003年第3期61-64,共4页
Petroleum Exploration and Development
基金
国家"十五"重大科技攻关项目 (2 0 0 1BA60 5A0 9)
关键词
东营凹陷
油源对比
生油洼陷
烃源岩
生物标志化合物
Dongying Sag
analysis of source and oil
petroleum generating sub sag
source rock
biomarker
