Characteristics and Evaluation of Low Resistivity Reservoir in Ordos Basin
The microcosmic factors which caused reservoir resistivity decrease have several cases on Ordos basin. It was shown that low resistivity reservoir with high irreducible water saturation have fine grain, micropores developed well and complicated pore structures. And with sandstone rich in argillaceous or clay mineral usually appear at fresh water formation. Low resistivity reservoir with high total porosity and high microporosity is caused by strong dissolution and heterogeneity. And its relations with the reservoirs are low-amplitude structural reservoirs, the height of the reservoir is small, the oil and water transition belt is wide and the water bearing saturation of the oil formation is high. Then it relates with high or very high formation water salinity. Mud invasion could cause the apparent formation resistivity decrease and it has deeply mud invasion in part high permeability zone. The characteristics for oil and water layer identification at low resistivity zone have been presented.
low resistivity logging evaluation microcosmic factors
Ma Huolin Wei Haiyun
School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, Ch China Petroleum Logging Co., Ltd, Xian 710021, China
国际会议
The IPACES 6th Annual Meeting(“现代地球科学，交流与合作国际学术研讨会暨第六届IPACES学术年会)
武汉
英文
22-24
2007-04-25（万方平台首次上网日期，不代表论文的发表时间）