摘要
盐水泥浆侵入作用对东海油田H区电缆测井和随钻测井均产生严重影响,为测井精确评价油气层带来了很大的挑战。根据随钻及电缆电阻率的测井差异,从孔隙度、渗透率、饱和度、侵泡时间等多角度分析了侵入作用对电阻率的影响。利用有限差分法模拟了侵入剖面特征,及不同孔渗条件下的地层电阻率剖面特征;采用最优化方法和基于一维和二维相结合的方法,开发了电阻率测井反演软件。实际应用表明,H区油气饱和度评价精度和流体性质判别效果均得到显著提高,电阻率反演技术为盐水泥浆侵入储层的精细评价奠定了坚实的基础。
The intrusion of the saltwater mud has serious effect on the cable logging and LWD in the H-area of the east China sea oil field,which is a great challenge to accurately evaluate the reservoirs.According to the log difference between the drilling and cable resistivity,we have analyzed the influence of the intrusion on the resistivity from the porosity,permeability,saturation and penetration time.We have simulated the characteristics of the intrusion profile and the formation resistivity profile with different porosity conditions by using the finite difference method and developed the resistivity log inversion software with the optimization method and the method based on one-dimension and two-dimension.The practical application result indicates the processing result has been much improved by using the resistivity after inversion to identify the properties of the fluid and evaluate the gas saturation.The resistivity inversion technique has laid a solid foundation for the fine evaluation of the reservoirs intruded by salt water.
作者
张国华
周全
张志强
张国栋
张宏伟
张朝华
Zhang Guohua;Zhou Quan;Zhang Zhiqiang;Zhang Guodong;Zhang Hongwei;Zhang Chaohua(Oilfield Technology Division,China Oil Field Service Limited,Yanjiao Heibei 065201,China;Shanghai Exploration Department of China Offshore Oil Co.Ltd.,Shanghai 200335,China)
出处
《工程地球物理学报》
2018年第2期131-139,共9页
Chinese Journal of Engineering Geophysics
基金
中国海洋石油总公司"十二五"重大科技专项(编号:CNOOC-KJ 125ZDXM 07LTD)
关键词
电阻率差异
影响因素
电阻率反演
储层评价
resistivity difference
main affecting factor
resistivity inversion
reservoir evaluation
作者简介
第一作者：张国华（1969-），男，硕士，工程师，主要从事测井技术研究及项目管理工作。E-mail:zhanggh13@cosl.com.cn
