基于岩石物理相分类确定特低渗透油层有效厚度——以安塞油田沿河湾地区长6特低渗透储层评价为例

针对陕北斜坡中部特低渗透储层受沉积环境、成岩作用、构造等因素影响,储层储集性能和渗流结构差异较大,测井响应复杂的特点,利用岩石物理相分类确定特低渗透油层有效厚度。通过安塞油田沿河湾地区长6储层各类测井、岩芯和试油资料,研究评价岩石物理相的多种信息、划分方法及其分类评价,建立不同类别岩石物理相油层有效厚度参数下限的差异、特征及评价标准,分析了微电极曲线提取特低渗储层岩石物理相背景特征。并以实例分析提取特低渗透储层岩石物理相分类表征参数,实现了将非均质、非线性问题转化为相对均质、线性问题解决,提高了测井精细解释油层有效厚度的精度和效果。

Refined Evaluating Thickness of Extra-Low Permibility Reservoir Using Lithophase Classification——Take the Chang 6 Extra-Low Permeability Reservoir of the Yanhewan Area as an Example

This study defined the effective thickness of extra-low permeability reservoirs using lithophase classification,due to the fact that extra-low permeability reservoirs in the middle section of the Shanbei slope are affected by depositional settings,reservoir performance,diagenesis and structures,reservoir performance and infiltrating textural difference varies greatly,and log responses were complicated. Based on the various logs,cores and testing data,the Chang 6 reservoir of the Yanhewan area in the Ansai o...