利用等效孔隙度法估算火成岩储层渗透率  

Igneous Formation Permeability Prediction with the Equivalent Porosity Method

作　　者：李玮[1] 张超谟[1,2] 吴一雄[1] 谢冰[1] 

机构地区：[1]长江大学地球物理与石油资源学院,湖北荆州434023 [2]油气资源与勘探技术教育部重点实验室长江大学,湖北荆州434023

出　　处：《测井技术》2012年第6期607-610,共4页Well Logging Technology

基　　金：国家大学生创新性实验项目(A101048927)

摘　　要：火成岩储层因其岩性复杂、孔隙结构多变、裂缝大量发育、且沿井深方向非均质性强,致使其孔隙度渗透率关系复杂,应用常规方法定量计算其渗透率值十分困难。由斯通利波时差求取流体移动指数(Qfm),结合其他测井信息(如密度、井径等)并由此定量等效孔隙度大小,再由岩心数据分类建立等效孔隙度与等效孔隙度下平均渗透率间的关系,用以估算火成岩渗透率,从而避免了斯通利波合成反演方法中较大的计算量,且无需每口井的参考渗透率。经JL油田B区域实际火成岩地层检验,该方法得到的渗透率计算结果符合精度要求。Rock complexity, changing pore structure, large amounts of fractures, and strong heterogeneity along the depth direction lead to the difficulty of igneous quantitative permeability prediction. An effective method to determine the igneous formation permeability is the Stoneley wave. And the parameter Qfm, calculated by Stoneley slowness, is related with the formation permeability. In this paper, we calculate the Qfm and relate it to the equivalent porosity. And then we built the classified relationship between the equivalent porosity and equivalent permeability. With this classified relationship, we can avoid the huge amounts of calculation in the Stoneley wave modeling and inversion, and determine the formation permeability without the reference formation permeability value. And the predicted value, tested in the B area of JL field, can satisfy the accuracy requirements.

关 键 词：测井解释 渗透率 斯通利波 流体移动指数 等效孔隙度法 火成岩 

分 类 号：P631.84[天文地球—地质矿产勘探]