摘要
东营凹陷的稠油油藏多分布在凹陷边缘的非生油岩系中，它们是凹陷内的油气经地层不整合通道运移，并在不整合伴生圈闭中聚集而形成的次生油气藏。烃类沿地层不整合运移所留下的各种痕迹，揭示了稠油地层油藏的成因机制。油质变稠的原因，主要是油气长距离运移，高地温的作用和区域盖层封堵性变差，促使原油中轻组分大量散失，重组分浓缩的结果。
Heavy oil reservoirs in Dongying depression were usually distributed in non source rock at the edge of the depression.They are secondary reservoirs formed by accumulating of oil and gas along unconformity surface in unconformity traps.Genetic mechanism of heavy oil reservoir is revealed by various traces left by hydrocarbons migrating along the stratigraphic unconformity .The main reasons for thickening of crude oil are long distance migration of oil and gas,high formation temperature and worsening of sealing ability of regional cap rock.All these caused that most light component of crude oil escaped and heavy component concentrated.
出处
《特种油气藏》
CAS
CSCD
1996年第1期1-5,共5页
Special Oil & Gas Reservoirs
关键词
稠油油藏成因
不整合
油气运移
origin of heavy oil reservoir,unconformity,migration of oil and gas,stratigraphic trap,cap rock
