粒子群优化交叉偶极子声波测井地层各向异性的反演方法  

Inversion method of formation anisotropy of cross dipole shear wave logging based on particle swarm optimization algorithm

作　　者：李鹏举[1,2] 魏双宝 田甜 Li Pengju;Wei Shuangbao;Tian Tian(School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China;Accumulation & Development of Unconventional Oil & Gas, State Key Laboratory Cultivation Base Jointy-Constructed by Heilongjiang Province & Ministry of Science & Technology, Northeast Petroleum University, Daqing 163318, China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]东北石油大学非常规油气成藏与开发省部共建国家重点实验室培育基地,黑龙江大庆163318

出　　处：《黑龙江科技大学学报》2021年第2期146-150,共5页Journal of Heilongjiang University of Science And Technology

摘　　要：为提高地层各向异性反演的精度和稳定性,采用粒子群优化算法,利用Alford旋转法得到快、慢横波表达式,根据波形匹配原则建立了反演目标函数,最后由粒子群优化算法求取反演目标函数的最小值,得到了快横波方位角和快慢横波慢度,从而计算各向异性大小及方向。与CIFLog软件处理的结果相比,粒子群优化算法能够准确可靠地反演各向异性参数,提高了处理速度和处理结果的稳定性。This paper aims to improve the accuracy and stability of the formation anisotropy inversion.The study involves obtaining the fast and slow shear wave expressions using the particle swarm optimization algorithm and the Alford rotation method;and establishing the inversion objective function according to the waveform matching principle and ultimately realizing the minimum value of the inversion objective function using the particle swarm optimization algorithm,and obtaining the fast shear wave azimuth angle and the fast and slow shear wave slowness,thereby calculating the anisotropy size and direction.The comparison between the actual cross dipole array acoustic logging results processed by this method and those processed by CIFLog software points to the proposed particle swarm optimization algorithm enabling more accurate and reliable inversion of anisotropic parameters,resulting in an improved processing speed and stability.

关 键 词：测井 粒子群优化算法 交叉偶极子声波测井 地层各向异性 反演波 

分 类 号：P631[天文地球—地质矿产勘探]