Reservior Characteristics and Control Factors of Chang 81 of Yanchang Formation of Triassic in Juyuan Region of Ordos Basin
详细信息
- 责任者：Liao Peng (Key Laboratory of Petroleum Resources Research ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Tang Jun
- 刊名：Journal of Mineralogy and Petrology
- 出版年：2012
- 卷期：32(2)
- 关键词：储层性质 ; reservoir properties ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.97-104
- 图表：4 illus., 1 table, 19 refs.
- 分类号：1003
- issnNo：ISSN1001-6872
- isbnNo：CN51-1143/TD
摘要
///The Chang 81 reservoir is one of the oil stratigraphic horizons with great exploration potentiality in jiyuan region of the Ordos basin. This reservoir is investigated by analysis of lithology,thin sections,SEM and core properties. It is showed that the types of pore are mainly intergranular pores with minor secondary solution pores, and the reservoir is characterized by low porosity and permeability with average porosity of 7.81%, average permeability of 0.26×10-3 μm2. Sedimentary condition is the basis for the formation of original mineral compositions and rock texture, which plays some control action on reservoir physical property and creates the differences among original reservoir physical property of distributary channel, underwater distributary channel,mouth bar and distal bar. Diagenesis was the key factor affecting reservoir physical property.