空气钻井补偿中子测井响应的蒙特卡罗模拟及应用  

Monte Carlo Numerical Simulation of Compensated Neutron Log and Its Application in Air Drilling

作　　者：王红涛 张占松[1,2] 陈子善[1] 

机构地区：[1]长江大学地球物理与石油资源学院,湖北荆州434023 [2]油气资源与勘探技术教育部重点实验室(长江大学),湖北荆州434023

出　　处：《石油天然气学报》2011年第6期228-231,共4页Journal of Oil and Gas Technology

基　　金：中国石油科技创新基金项目(2008D-5006-03-02)

摘　　要：由于介质井眼的改变,空气井中补偿中子测井仪器的响应与液体井中有很大不同,利用液体介质井眼下刻度的补偿中子测井仪不能满足气体介质井眼测井的要求。利用蒙特卡罗方法,模拟了空气井中补偿中子测井响应以及井径变化对测井响应的影响。通过仪器刻度的方法对模拟结果进行处理,得到空气钻井补偿中子测井刻度后的仪器响应与孔隙度的关系曲线以及扩径校正方法,并应用于实际井中求取中子孔隙度,取得了一定的效果。As a result of different medium in the well,the log responses of compensated neutron logging(CNL) tool in air wells differed from that in water well,and,therefore CNL calibrated in water well failed to meet the demands of air well logging.With Monte Carlo method,the CNL responses in air wells are simulated under the condition of different porosities.The relation curve of CNL response and porosity,and the method of hole size correction in air well are obtained by the calibration of simulated output,it is used to calculate the porosity of a well and certain effect is obtained.

关 键 词：空气钻井 补偿中子测井 蒙特卡罗数值模拟 

分 类 号：P631.81[天文地球—地质矿产勘探]