Characteristics and Controlling Factors on Physical Properties of Low-Permeability Sandstones of the Laiyang Formation in the Laiyang Sag, Jiaolai Basin
详细信息
- 责任者：Zhou Yong (State Key Laboratory of Petroleum Resource & Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Ji Youliang
- 刊名：Acta Petrolei Sinica
- 出版年：2011
- 卷期：32(4)
- 关键词：砂岩 ; sandstone ; 储集层 ; reservoirs
- 页码：p.611-620
- 图表：8 illus., 3 tables, 21 refs.
- 分类号：1003
- issnNo：ISSN0253-2697
- isbnNo：CN11-2128/TE
摘要
The paper investigated basic geological characteristics of clastic reservoirs of the Laiyang Formation in the Laiyang Sag, Jiaolai Basin based on outcrop and core observations by applying various measurements. The results demonstrated that the sandstones were characterized by low compositional maturity and medium textural maturity. Uplifting in latest Cretaceous-Cenozoic allowed the preservation of some porosities,and microfractures produced by tectonism, on the one hand, created space for oil and gas accumulations, on the other hand, provided oil and gas migration pathway to improve the filtration of the low-permeability reservoirs. Therefore, the fracture reservoir is new targets and breakthrough point for further exploration in the Laiyang Sag.