Aiming at the problem of anisotropy inversion of tight sands, a new method for extracting resistivity anisotropy from array laterolog and micro-resistivity scanning imaging logging is proposed, and also the consistency of electric and acoustic anisotropy is discussed. Array laterolog includes resistivity anisotropy information, but numerical simulation shows that drilling fluid invasion has the greatest influence on the response, followed by the relative dip angle θ and electrical anisotropy coefficient λ. A new inversion method to determine r_i, R_xo, R_t and λ is developed with the given θ and initial values of invasion radius r_i, flushed zone resistivity R_xo, in-situ formation resistivity R_t. Micro-resistivity image can also be used for describing the resistivity distribution information in different directions, and the electrical characteristics from micro-resistivity log in different azimuths, lateral and vertical, can be compared to extract electric anisotropy information. Directional arrangement of mineral particles in tight sands and fracture development are the intrinsic causes of anisotropy, which in turn brings about anisotropy in resistivity and acoustic velocity, so the resistivity anisotropy and acoustic velocity anisotropy are consistent in trends. Analysis of log data of several wells show that the electrical anisotropy and acoustic anisotropy extracted from array laterolog, micro-resistivity imaging and cross-dipole acoustic logs respectively are consistent in trend and magnitude, proving the inversion method is accurate and the anisotropies of different formation physical parameters caused by the intrinsic structure of tight sand reservoir are consistent. This research provides a new idea for evaluating anisotropy of tight sands.

针对致密砂岩各向异性反演的问题，提出了一种从阵列测井和微电阻率扫描成像测井中提取电阻率各向异性的新方法，并讨论了电各向异性和声各向异性的一致性。阵列测井资料包括电阻率各向异性信息，但数值模拟表明，钻井液的入侵对响应的影响最大，其次是相对倾角θ和电各向异性系数λ。在给定θ的情况下，开发了一种新的确定r _i，R _xo，R _t和λ的反演方法侵入半径r _i和初始值，冲洗区电阻率R _xo，原位地层电阻率R _t。微电阻率图像还可以用于描述不同方向上的电阻率分布信息，并且可以比较来自横向和垂直不同方位角的微电阻率测井的电特性，以提取电各向异性信息。致密砂中矿物颗粒的定向排列和裂缝发育是各向异性的内在原因，反过来又引起电阻率和声速各向异性，因此电阻率各向异性和声速各向异性趋势一致。对几口井测井资料的分析表明，从阵列测井，微电阻率成像和交叉偶极声波测井中提取的电各向异性和声各向异性在趋势和幅度上都是一致的，证明了反演方法的正确性，致密砂岩储层固有结构引起的不同地层物理参数各向异性是一致的。该研究为评价致密砂的各向异性提供了新的思路。