鄂尔多斯盆地子长油田中区长2油层有效厚度评价

Effective Thickness Evaluation of Chang 2 Oil Layer in Zichang Oilfield,Ordos Basin

在明确研究区储层特征、四性关系的基础上,建立储层孔、渗、饱评价方法,综合岩心化验、地质录井、测井解释等资料,确定子长油田中区长2有效储层岩性下限为细砂岩,含油性下限为油斑,物性下限为孔隙度≥10.0%、渗透率≥1.0×10^(-3)μ^(3)、AC≥230μ^(2)·m^(-1)、RILD≥12Ω·m且RILD>-0.4328AC+120.63、S_(O)≥32%。

On the basis of defining the reservoir characteristics and four-relationships in the study area,the evaluation methods of reservoir porosity,permeability and saturation were established,and core test,geological logging,logging interpretation and other data were integrated.It was determined that the lower limit of effective reservoir Chang 2 in the middle area of Zichang oilfield was fine sandstone,the lower limit of oil content was oil spot,and the lower limit of physical property was porosity≥10.0%,permeability≥1.0×10^(-3)μm,AC≥230μs·m^(-1),RILD≥12Ω·m and RILD>-0.4328AC+120.63,S_(o)≥32%.