基于斯通利波的反射源定位及裂缝宽度反演  

Reflection source positioning and fracture width inversion based on Stoneley wave

作　　者：谈笑宇 李盛清 苏远大[1,2] 唐晓明 TAN Xiaoyu;LI Shengqing;SU Yuanda;TANG Xiaoming(School of Geosciences in China University of Petroleum(East China),Qingdao 266580,China;China Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,青岛266580 [2]青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室,青岛266071

出　　处：《应用声学》2024年第6期1313-1323,共11页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(42174145,42074137);国家重点研发计划项目(2019YFC0605504);山东省自然科学基金项目(ZR201911120382);中央高校基本科研业务费专项资金项目(20CX06077A)。

摘　　要：裂缝的渗流能力影响井的产能,因此裂缝识别和描述成为油藏管理的重要方面。在声波测井中,低频反射斯通利波通常可为过井眼裂缝的定位和评价提供技术依据。为便捷有效地反演裂缝宽度,该文采用反射堆叠法对实际数据进行了反射源定位和反射系数计算,采用一维等效波数法研究了过井裂缝的理论反射系数,随后提出了基于反射斯通利波的裂缝识别和裂缝宽度反演方法,并将其用于现场实际资料。数值模拟结果表明,渗透性裂缝的反射系数随频率的增大呈下降趋势。反演结果表明,斯通利波反演裂缝宽度与电成像裂缝宽度在变化趋势上有很好的一致性,验证了斯通利波反演方法的有效性,为无电成像资料井段的裂缝参数提取提供了新方法。The hydraulic conductivity of fractures crossing the well strongly affects well productivity,making fracture identification and description an important aspect of reservoir management.In acoustic logging,low frequency reflected Stoneley waves can provide technical support for the positioning and evaluation of the fracture crossing the well.In order to retrieve the fracture width conveniently and effectively,the reflection source position and reflection coefficient of the actual data are calculated by the reflection stacking method,and the theoretical reflection coefficient of the fracture is studied by the 1D effective wavenumber method.Then,the method of fracture identification and fracture width inversion based on the reflected Stoneleys wave is proposed,and it is applied to the actual data in thefield.The numerical simulation results show that the reflection coefficient of permeability fracture decreases with the increase of frequency.The inversion re-sults show that there is a good agreement between Stoneley wave inversion and electrical imaging fracture width in the variation trend,which verifies the validity of the Stoneley wave inversion method,and provides a new method for extracting fracture parameters of well section without electrical imaging data.

关 键 词：裂缝评价 反射斯通利波 反射源定位 反射系数 裂缝宽度反演 

分 类 号：P631[天文地球—地质矿产勘探]