摘要
鄂尔多斯盆地冯地坑-洪德地区延长组长8油层段是重要的储集层之一,包括长81和长82两个砂岩组。通过储层岩石学、储层物性、孔隙结构及储层控制因素等方面对储层特征进行分析,总结并评价储层储集性能。研究结果表明,储层岩石类型主要为中细粒长石砂岩和岩屑长石砂岩,成分成熟度低,结构成熟度中等;岩石物性总体较差,属低孔、低渗储层,发育粒间孔隙、溶蚀孔隙等孔隙类型,喉道以中-细喉为主。根据岩性和物性分析特征可将储集岩分为3类,Ⅰ类储层为研究区最好的储层,但其分布范围很有限,Ⅱ类和Ⅲ类储层是研究区最主要的储层类型,因此今后勘探开发应以Ⅱ类和Ⅲ类储层为主。
The Reservoir Chang 8,which is composed of Chang 81 and Chang 82 sandstone in Fengdikeng-hongde area in Ordos Basin is an important oil reservoir.The characteristics of reservoir is summarized and evaluated on the basis of petrological and physical features.the texture of porosity and the controlling features of reservoir strata.It is shown that the lithotypes are the medium-fine granular arkose and lithic arkose which have the characteristics of low compositional maturity.middle texture maturity,low porosity and permeability.The reservoir develops interparticle pore and emposieu.The main throat type is the medium-fine throat.Based on the lithology and physical property the formation can be divided into 3 types.The type Ⅰis the best while it is relatively limited.The type Ⅱand type Ⅲ are main types and the favourable reservoir for exploration and development.
出处
《长江大学学报（自科版）（上旬）》
CAS
2010年第3期473-475,共3页
JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG
关键词
鄂尔多斯盆地
长8储层
储层评价
Ordos Basin
Reservoir Chang 8
reservoir evaluation
