各向异性孔隙地层随钻声波测井理论模拟及应用  

Theoretical Simulation and Application of Acoustic Logging While Drilling in Anisotropic Porous Formation

作　　者：郭同政 申富豪 饶博 苏远大[3] GUO Tong-zheng;SHEN Fu-hao;RAO Bo;SU Yuan-da(Sinopec Matrix Corporation Ltd.,Qingdao 266000,China;Hainan Branch of CNOOC Ltd.,Haikou 570311,China;Key Laboratory of Deep Oil and Gas,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中石化经纬有限公司,青岛266000 [2]中海石油(中国)有限公司海南分公司,海口570311 [3]中国石油大学(华东)深层油气重点实验室,青岛266580

出　　处：《科学技术与工程》2023年第28期11962-11971,共10页Science Technology and Engineering

基　　金：中国石油大学(华东)研究生创新基金项目和中央高校基本科研业务费专项资金(23CX04016A)。

摘　　要：储层中普遍存在的各向异性和渗透性均会对弹性波传播产生影响。为满足油气资源勘探需求,对复杂储层中各向异性与渗透率的测量评价已逐渐从常规的电缆测井(wireline, WL)发展为随钻声波测井(acoustic logging while drilling, ALWD)。建立随钻声波测井模型,以Biot理论为基础研究了弹性波在横观各向同性孔隙地层中的传播机制,并对含有钻铤的充液井孔内各部分声场进行分析,导出了横观各向同性孔隙地层随钻声波测井的声场表达式。研究了随钻多极子声场模式波的频散特征。结合时间-慢度相关法分析了阵列波形中地层波和钻铤波的到时及慢度特征。结果表明:随钻斯通利波和螺旋波速度频散曲线对地层各向异性和渗透率有不同程度的灵敏度,可用于实际资料的反演,并在此基础上处理了实钻井声波数据,对地层渗透率和各向异性进行了综合评价。研究成果可作为复杂介质地层中随钻声波测井解释的理论基础。Both anisotropy and permeability affect the propagation of elastic wave in reservoirs.With the progress of oil and gas exploration,methods for evaluating anisotropy and permeability in complex reservoirs have been developing from wireline(WL)to acoustic logging while drilling(ALWD).The propagation mechanism of elastic waves in transversely isotropic porous formation was studied based on the Biot theory.By analyzing the sound field in each part of the fluid-filled borehole containing collar,the expression of ALWD in transverse isotropic porous formations was derived.In the following,the properties of the mode waves generated by ALWD multipole sources were investigated through the computation of dispersion and time-slowness correlation analysis of array waveforms.The results show that the velocity dispersion curves of Stoneley and quadrupole waves are sensitive to anisotropy and permeability to varying degrees and can be used for the inversion of field data.In the following,formation permeability and shear wave anisotropy parameters simultaneously were obtained based on ALWD data.The application of this method realized comprehensive evaluation of formation permeability and anisotropy in the field data processing.The research results provide a theoretical basis for interpretation of ALWD in anisotropic porous formation.

关 键 词：随钻声波测井(ALWD) 孔隙介质 横观各向同性 渗透率 

分 类 号：P631.8[天文地球—地质矿产勘探]