Experimental Correction of Dual Lateral Reservoir Resistivity After High Salinity Drilling Fluid Invasion

doi:10.7657/XJPG20220414

Abstract

Abstract:

In order to eliminate the influences of high salinity drilling fluid invasion on dual lateral resistivity, it is necessary to restore the real resistivity of formation. By analyzing the factors influencing rock electric experiment, the electrode system and measuring technology were improved to make the resistivity of the rock sample from impermeable layers consistent with the double lateral resistivity. Under the conditions of high temperature and high pressure, the rock electric parameters were measured with the semi-permeable baffle plate gas flooding method, and then the drilling fluid invasion was simulated by displacing the oil in rock samples with high salinity drilling fluid. Finally, the relationship between rock sample resistivity and logging resistivity was established and a correction method for logging resistivity based on experiment was formed. The application of the method in multiple wells in the hinterland of Junggar basin shows that the gas saturation calculated with the corrected resistivity is more reasonable. The method provides an effective means for logging response analysis and reservoir evaluation.

Key words: high salinity, drilling fluid, semi-permeable baffle plate, high temperature and high pressure, rock electric experiment, dual lateral resistivity, resistivity correction, saturation evaluation

CLC Number:

TE135

MU Liwei, WANG Gang, LUO Xingping, FAN Haitao, LIN Shijun, WANG Guohui. Experimental Correction of Dual Lateral Reservoir Resistivity After High Salinity Drilling Fluid Invasion[J]. Xinjiang Petroleum Geology, 2022, 43(4): 474-478.

Figures/Tables 3

References 20

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