井眼垮塌和泥岩层蚀变下的密度和声波环境校正

Environment Correction on Acoustic and Density Logging Data in the Case of Wellbore Collapse and Mudstone Alteration

陈国军 任军民 胡婷婷 范小琴 高明 李静

CHEN Guojun REN Junmin HU Tingting FAN Xiaoqin GAO Ming LI Jing

新疆油田公司勘探开发研究院地球物理研究所, 新疆乌鲁木齐 830013

Geophycial Research Institute of Research Institute of Exploration and Development of Xinjiang Oilfield Company, Urumqi Xinjiang 830013, China

针对准噶尔盆地地层泥岩垮塌和泥岩层蚀变对密度和声波测井值的影响,首先提出垮塌蚀变指数概念,进而针对不同影响程度,提出了经验公式校正、正演校正及神经网络校正方法,将上述方法应用到地震标定和波阻抗反演中,使得合成地震记录与井旁地震道的相位与能量的对应关系及反演中砂体的预测更加准确。

he acoustic and density logging values have been influenced by wellbore collapse and mudstone alteration in Junggar basin. To solve this problem, firstly, the concept of collapse and alteration exponent has been put forward. In terms of the influence extent, the density and sonic logging data are corrected with empirical formula, forward modeling and neural net. Through the application of the above correction method to seismic calibration and wave impedance inversion, it is more accurate in forecasting the phase and energy corresponding relationship between synthetic seismogram and seismic trace near a well, and more accurate in forecasting sand body.

https://doi.org/10.3969/j.issn.1008-2336.2012.03.092