偶极子声波测井资料在致密砂岩气藏中的应用

偶极子横波测井采用偶极声源和定向接收技术,并结合单极技术,在硬和软两种地层中都可以直接提取纵波、横波和斯通利波的测量结果,拓宽了声波测井资料的应用领域。现在,声波测井资料已被广泛用于确定地下岩层的机械特性,用于计算岩石的各种弹性常数,结合地层各向异性分析,可对储层进行有效的气层识别、裂缝识别和压裂效果分析。应用实例表明,偶板子声波测井在低孔低渗裂缝性储层评价中是一种积极有效的方法,在吐哈油田收到了良好的效果,具有广阔的应用前景。

APPLICATION OF DIPOLE ACOUSTIC LOGGING DATA IN DENSE SAND GAS RESERVOIRS

Diploe transversal wave acoustic logging,combining with monopole technology,uses double source and directional reception technology to extract longitudinal waves,transversal waves and Stoneley waves directly,which widens the application area of acoustic logging data.Nowadays, acoustic logging data have been used to determine the mechanical characteristics of underground formation and calculation of various elastic constants.Combining with analysis of formation anisotropy,effective identification of gas zones and fractures can be carried out and fracture effect can be analyzed.Application cases indicate that dipole acoustic logging is a positive effective method to evaluate low porosity and permeability fractured reservoirs.It has got favorable effect in Tuha oilfield and has wide prospect.