Study on Hydrocarbon Migration and Accumulation Process of Stratigraphic Reservoir in Lean Oilfield
详细信息
- 责任者：Ning Fangxing (Geo-Resources and Information College ; China University of Petroleum ; Dongying 257061 ; China)
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2011
- 卷期：18(1)
- 关键词：油气运移 ; oil and gas migration ; 油气聚集 ; oil and gas accumulation ; 山东 ; Shandong Province
- 页码：p.38-42
- 图表：3 illus., 10 refs.
- 分类号：1003
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
In this paper, the main migration route and process of stratigraphic reservoir in Lean oilfield are determined. The correlation of oil source indicates that the oils of Lean oilfield come from hydrocarbon source rock of the upper Es4 in Boxing and Niuzhuang Sag. Translocating systems of oil migration are composed of fault, sand body and unconformity. The hydrocarbons from Niuzhuang Sag enter the eastern area of Lean oilfield and Guangrao buried hill by Chenguanzhuang fault.At the same time, after the oils from Boxing Sag migrate to Well Cao112 along the downthrown side of Shicun fault, the oils migrate along two routes: parts of oils entering thrown side of Shicun fault meet with oil from Niuzhuang Sag, and then migrate to Guangrao buried hill along the upthown side of Shicun fault; the other parts of oils enter the southern area of Lean oilfield. The oils migrating to basin margin from Niuzhuang and Boxing Sag are controlled by unconformity structure so that three kinds of stratigraphic reservoirs are formed in Lean oilfield. The stratigraphic overlaping reservoirs easily form above the mudstone, weathered clay layer and “crust”, and the stratigraphic unconformity barrier reservoir and buried hill reservoir easily form below the mudstone, weathered clay layer and “crust”.