测井技术2017，Vol.41Issue(5)：544-549,6.DOI:10.16489/j.issn.1004-1338.2017.05.009
碳氧比测井曲线水流影响校正
Correction of Water Flow Effect on Carbon/Oxygen Logging Curves
张鸥盟 1郑华 2张唯聪 2沈付建2
作者信息
- 1. 东北石油大学地球科学学院,黑龙江大庆163318
- 2. 大庆油田有限责任公司测试技术服务分公司,黑龙江大庆163453
- 折叠
摘要
Abstract
It is needed to correct the effect on the carbon/oxygen logging curves caused by upward water flow around a pulsed neutron spectral tool,when the oxygen activation index (IOA) curve increases,and the carbon/oxygen ratio (C/O) curve and the capture silicon/calcium ratio (Si/Ca)curve decrease correspondingly.This effect arises from counts of oxygen activation gamma-ray caused by water flow provide certain contributions in the net inelastic spectrum and the capture spectrum,which lead to increases of inelastic oxygen yield and capture calcium yield.As the contributions of oxygen activation gamma-rays in these spectra are all proportional to the value of IOA,the IOA curve is employed in data processing and interpreting to correct water flow effects on the C/O curve and Si/Ca curve.By using the proposed correction formulas,water flow effects on the corrected logging curves can be completely removed.Results of processing field logging data demonstrate that the IOA curve in a pulsed neutron spectral log not only plays an assistant role in indicating the main water-producing layers and channeling behind casing,but al plays a key role in improving the interpretation accuracy of reservoir oil saturation and the comprehensive evaluation of formation water-flooded level through its function in correcting the main carbon/oxygen logging curves which are affected by water flow.关键词
脉冲中子全谱测井/碳氧比/硅钙比/氧活化指数/水流影响/校正/含油饱和度Key words
pulsed neutron spectral/carbon/oxygen ratio/silicon/calcium ratio/oxygen activation index/water flow effect/correction/hydrocarbon saturation分类
天文与地球科学引用本文复制引用
张鸥盟,郑华,张唯聪,沈付建..碳氧比测井曲线水流影响校正[J].测井技术,2017,41(5):544-549,6.
