各向异性地层中的偶极声波测井响应特性及反演  

Response Characteristics and Inversion of Dipole Acoustic Logging in Anisotropic Formation

作　　者：仵杰[1,2] 雪宇超 路涛 李高仁 陈广识 WU Jie;XUE Yuchao;LU Tao;LI Gaoren;CHEN Guangshi(School of Electronic Engineering,Xi’ an Shiyou University,Xi’ an,Shaanxi 710065,China;Key Laboratory of MOE for Photo-electricity Oil-Gas Logging and Detecting,Xi’ an Shiyou University,Xi’ an,Shaanxi 710065,China;Logging Company Limited,CNPC,Xi’ an,Shaanxi 710077,China;Changqing Oilfield Exploration and Development Research Institute,China National Petroleum Corporation,Xi’ an,Shaanxi 710018,China)

机构地区：[1]西安石油大学电子工程学院,陕西西安710065 [2]光电油气测井与信息检测教育部重点实验室,陕西西安710065 [3]中国石油集团测井有限公司,陕西西安710077 [4]中国石油天然气集团长庆油田勘探开发研究院,陕西西安710018

出　　处：《西安石油大学学报（自然科学版）》2022年第4期76-83,共8页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：“十三五”国家科技重大专项“高精度油气测井技术与装备研发及应用”(2017ZX05019002);“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(2016ZX05050)。

摘　　要：建立了一种能够反映地层应力影响的各向异性地层模型,并基于COMSOL数值模拟软件在这种各向异性地层条件下进行了偶极声波测井的正演响应数值模拟,计算得到了2种各向异性方向及3种各向异性强度条件下的偶极声波测井全波波形,分析结果表明:在2种应力方向变化模型中,变化应力方向角度对阵列波形中同向分量及交叉分量波形幅度及能量影响明显;在3种各向异性强度变化模型中,变化地层各向异性强度对同向分量波形幅度影响显著且呈梯度式变化,交叉分量波形幅度呈逆常理性变化。采用模拟退火优化算法对偶极声波测井正演波形进行反演处理,得到的地层各向异性强度及方向与正演模型一致,证实了本文建立的正演方法的正确性。An anisotropic formation model is established that can reflect the influence of formation stress.Based on the COMSOL numerical simulation software,the forward responses of dipole sonic logging are simulated under different anisotropic formation conditions,and the full-wave waveforms of dipole sonic logging under two anisotropy directions and three anisotropic strengths are calculated.The results show that the change of stress direction has an obvious effect on the waveform amplitude and energy of the same direction component and cross component in the array waveform;the change of anisotropic strength has a significant effect on the waveform amplitude of the same direction component,which gradiently changes,and the waveform amplitude of cross component changes unconventionally.Simultaneously,the simulated annealing optimization algorithm is used to process the forward waveform of dipole sonic logging,and the magnitude and direction of the obtained formation anisotropy are consistent with the forward model,which confirms the correctness of the forward modeling method established in this paper.

关 键 词：偶极声波测井 正交偶极子声源 各向异性 数值模拟 模拟退火算法 

分 类 号：TE927[石油与天然气工程—石油机械设备] P631.814[天文地球—地质矿产勘探]