测井技术2025，Vol.49Issue(3)：355-364,10.DOI:10.16489/j.issn.1004-1338.2025.03.004
基于声波测井的含垂直裂缝储层各向异性和裂缝参数预测方法
Prediction Method for Anisotropy and Fracture Parameters of Reservoirs with Vertical Fractures Based on Acoustic Logging
摘要
Abstract
Fractures have a crucial impact on the storage capacity and permeability of oil and gas reservoirs.Accurate identification and quantitative evaluation of fractures are of vital importance in oil and gas exploration and development.However,due to the limitations of geophysical logging tools,it is difficult to directly obtain the complete elastic stiffness tensor used to describe anisotropic fractured reservoirs.To this end,this paper proposes a method,which can realize the prediction of fracture parameters and quantitative detection of gas-filled fractures in reservoirs with vertical fractures only by using conventional logging data(P-wave velocity,fast/slow S-wave velocity and density).Based on the linear slip theory,this paper deduces the anisotropic parameters(γ,ε,δ)of the fracture medium and the analytical expressions of the fracture parameters.Through the waveform coherence stacking methods and waveform matching inversion method,the multipole acoustic logging waveform data is processed and the relevant parameters are extracted.Through the parameter sensitivity analysis of the system,the differentiated control mechanism of different logging parameters on fracture characteristics is revealed:The S-wave splitting intensity dominate the anisotropic development,while the density selectively regulates the fracture compliance characteristics.Furthermore,the identification of gas-filled fracture can be carried out by the intersection of the fracture normal-tangential compliance ratio and the porosity curve.Practical applications show that this model can rapidly and effectively characterize the parameters of reservoir fractures and their anisotropy,and the results of identifying gas-filled fractures have a high degree of consistency with other logging interpretation results.This method can not only quickly evaluate the fracture properties and anisotropy of the formation,but also effectively identify gas-filled fractures.It has high practical value for the rapid evaluation and quantitative characterization of fractured oil and gas reservoirs.关键词
裂缝型储层/裂缝参数/各向异性参数/声波测井/含气裂缝识别/横波分裂Key words
fractured reservoir/fracture parameter/anisotropic parameter/acoustic logging/gas-filled fracture identification/shear wave splitting分类
天文与地球科学引用本文复制引用
孟继昆,漆乔木,李林鑫,李小斌,郑钦仁..基于声波测井的含垂直裂缝储层各向异性和裂缝参数预测方法[J].测井技术,2025,49(3):355-364,10.基金项目
国家自然科学基金项目"富有机质页岩地震波频散和衰减的理论及实验研究"(42274178) （42274178）
