摘要
从自然伽马测井基本原理出发 ,首先对测井曲线进行井眼校正 ,扣除井的影响 ,再计算井筒、地层及其上下围岩所占探测球域体积及其重心到探测器的距离 ,以此建立各单元体对伽马测井信号贡献的权函数。通过权函数逐层计算不同厚度地层条件下各单元体权因子 ,实现自然伽马曲线高分辨率处理。应用实例表明 ,该方法简便实用 。
From the principle of GR logging, the authors first correct logs for borehole effects, then calculate volumes in investigating areas taken by borehole, formation, up and low shoulder beds (simplified as four unit bodies), along with distance between gravitative center of the four unit bodies and detector (or ball center). Based on the above, the weighting function of each unit body to GR signal contributions are established. Weighting factor of each unit body under the condition of different thick formations is obtained from calculation of the above weighting functions, thus, realizing processing of GR logs with high resolutions. Field log examples prove this method is simple and practical.
出处
《测井技术》
CAS
CSCD
2002年第3期194-197,共4页
Well Logging Technology
