摘要
在薄片、扫描电镜、压汞、阴极发光等研究基础上,对鄂尔多斯盆地白豹油田三叠系延长组长4+5砂岩的成岩作用和储层特征进行了分析研究。分析认为原始矿物组成和结构、早成岩期的机械压实作用和化学压溶作用、晚成岩期的铁方解石胶结作用等共同作用导致了研究区长4+5储层低孔低渗的特征。同时,根据18个压汞分析样品11个孔隙结构变量的聚类分析结果,对研究区长4+5储层进行了分类评价,指出白豹油田长4+5储层以低孔低渗的Ⅱ类储层为主,其次为特低孔特低渗的Ⅲ类储层。
On the basis of investigating flakes, viewing under the microscope, pressure Hg and cathodoluminescence etc., the paper studies and analyses the diagenesis and reservoir characteristics of Member 4＋5 of Triassic Yanchang Formation in Baibao oilfield of Ordos Basin. It concludes that the low porosity and low permeability character of Member 4＋5 of Triassic Yanchang Formation is the result of the composion and structure of original minerals, the diagenesis function of early mechanical compress and chemical dissolve and the late cementation of iron-calcite. Simultaneously, the paper classifies and evaluates the reservoirs of Member 4 ＋ 5 of Triassic Yanchang Formation in study area according to the cluster analysis of 18 pressure Hg samples and 11 variables, indicates that Type Ⅱ of low porosity and low permeability reservoir of the Baibao oilfield is the master, then is the Type Ⅲ.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第5期522-527,共6页
Journal of Chengdu University of Technology: Science & Technology Edition
关键词
白豹油田
成岩作用
储层评价
聚类分析
低孔低渗
Baibao oilfield, diagenesis
reservoir evaluation
cluster analysis
porosity
permeability
