摘要
塔河油田超深碳酸盐岩储层经过多年开发,水侵井逐年增多,储层油、气和水的关系极其复杂,为此,利用井地电磁法开展了剩余油分布探测的应用探索研究。针对超深小尺寸目标识别难题,通过井中目的层段10 m或5 m间距多位置电磁场激发,地面采用25 m×25 m高密度大面积阵列数据采集,获取了高质量井地电磁三维数据集,进而开展数据预处理、三维差分相位异常处理、三维差分视电阻率处理和三维电阻率反演,获得了激发井段差分视电阻率(反映电性特征)、差分相位异常(反映激发极化性特征)和电阻率的三维地电结构模型,最后,利用测井解释成果进行标定,对目标区的剩余油空间分布进行刻画和解释,解释结果与生产井已有成果资料吻合。应用结果表明,井地电磁法为解决超深复杂碳酸盐岩储层剩余油的分布评价难题提供了很好的技术手段。
After years of development,water invasion occurred more frequently in those wells targeting the ultra-deep carbonate reservoirs in Tahe oilfield,which resulted in complicated gas-oil-water relations.We conduct an exploratory study on the distribution of remaining oil using the borehole-to-surface electromagnetic method.To obtain 3D high-quality EM data and identify small reservoirs in ultra-deep zones,we employ downhole multi-position stimulation with the spacing interval of 10 m(5 m)in the zone of interest and high-density large-area surface array data acquisition with the grid of 25 m×25 m,followed by data preprocessing,3d differential phase anomaly processing,3D differential apparent resistivity processing,and 3D resistivity inversion to derive a 3D geoelectric structure model involving differential apparent resistivity(reflecting electrical characteristics),differential phase anomaly(reflecting excitation polarization characteristics),and resistivity.We utilize the geoelectric model,which is calibrated using well logging interpretation data,to characterize the spatial distribution of remaining oil in the target area.The results are consistent with production data.This study provides a technical approach to the evaluation of remaining oil in ultra-deep complex carbonate reservoirs.
作者
马学军
侯海龙
张庆
赵国
曲昕馨
许士朝
李清坤
刘娟
MA Xuejun;HOU Hailong;ZHANG Qing;ZHAO Guo;QU Xinxin;XU Shichao;LI Qingkun;LIU Juan(Sinopec Northwest Oilfield Company,Urumqi 830011,China;BGP Inc.,China National Petroleum Corporation,Zhuozhou 072751,China)
出处
《石油物探》
北大核心
2025年第1期174-186,共13页
Geophysical Prospecting For Petroleum
基金
国家自然科学基金项目“不规则层状背景介质三维地井电磁频率域对比源反演研究”(42274152)资助。
关键词
超深碳酸盐岩
井地电磁法
电阻率反演
差分异常
剩余油分布
ultra-deep carbonate reservoir
borehole-to-surface electromagnetic method
resistivity inversion
differential anomaly
remaining oil distribution
