斯通利波影响因素分析及渗透率反演  

Influence factors of Stoneley wave and permeability inversion of formation

作　　者：许孝凯 陈雪莲 范宜仁 李霞[3] 刘美杰[4] 胡海川[3] 

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266580 [2]中国石油大学CNPC测并重点实验室,山东青岛266580 [3]中国石油勘探开发研究院,北京100083 [4]胜利石油管理局测井公司,山东东营257096

出　　处：《中国石油大学学报（自然科学版）》2012年第2期97-104,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家青年自然科学基金项目(40804020);中国石油天然气集团公司项目(2008A-2704);国家科技重大专项课题(2008ZX05020-001),国家科技重大专项课题(2008ZX05007-02);中央高校基本科研业务费专项资金资助项目(10CX04007A)

摘　　要：基于孔隙介质声学理论,对斯通利波影响因素进行研究,系统分析各因素对斯通利波相速度和衰减的影响程度。在利用正演模型进行灵敏度分析后,提出井孔内流体声速标定的方法,并对不同井径条件下斯通利波传播的正演模型传递矩阵进行重新推导,得出以测井间隔长度为变量的传播矩阵。在此基础上,结合利用斯通利波振幅和相位计算渗透率的方法,通过模拟退火算法实现地层渗透率的反演。反演结果表明:渗透率基值越大,反演结果越可靠;用斯通利波反演的渗透率曲线与岩心和常规曲线反映的储层性质以及砂泥岩剖面吻合好,其结果能满足现场工程的应用。The influence factors of Stoneley wave were researched based on the theory of porous media acoustics.The effect of different factors on the phase velocity and attenuation of Stoneley wave was analysed systematically.After the sensitivity analysis using forward modeling,a method of borehole fluid calibration was proposed.Through a new derivation of the transfer matrix of Stoneley wave forward simulation under different borehole diameter conditions,the transfer matrix was established as a function of logging interval length.On this basis,combining with the permeability calculation methods through the amplitude and phase of Stoneley wave,the permeability of formation was calculated with the simulated annealing algorithm.It can be seen that the larger permeability,the more reliable the results.The results agree well with the core data,the conventional data and the mudstone profile,and can meet the requirements of field application.

关 键 词：声波测井 渗透率 灵敏度 斯通利波 模拟退火 

分 类 号：TE19[石油与天然气工程—油气勘探]