Application of the cross-hole electromagnetic method (CHEM) in hydrocarbon reservoir monitoring
Shen Jinsong1,2,3, Wang Zhigang4, Ma Chao1, Wang Ningsheng5, Jia Yaozhong5
1. Geophysical Department, College of Geophysics and Informatics Engineering, China University of Petroleum (Beijing), Beijing 102249, China;
2. CNPC Key Lab of Geophysical Exploration, China University of Petroleum (Beijing), Beijing 102249, China;
3. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China;
4. BGP Inc., CNPC, Zhuozhou, Hebei 072751, China;
5. Tuha Oilfield Company, PetroChina, Shansan, Xinjiang 838202, China
Abstract：Developed in recent years, the cross-hole electromagnetic method (CHEM) is one of the new technologies applied to hydrocarbon reservoir evaluation and monitoring. It can directly provide information of resistivity distribution of an inter-well area, and therefore it can provide fluid distribution mapping at the inter-well scale. It can be used for identifying bypassed hydrocarbon resulted from the heterogeneity, monitoring the macroscopic sweep efficiency, planning optimum infill drilling and improving effectiveness of reservoir simulation. Based on the analysis of the publications related to the cross-hole electromagnetic method, we review in this paper its fundamental principle, development history, the techniques of data acquisition, processing and interpretation. We also discuss the challenges in the present applications and the development trend in the future.
