TY  - EJOU
AU  - Li, Jun 
AU  - Cheng, Guofeng 
AU  - Xiao, Hongwei 
AU  - Li, Xiang 
AU  - Wang, Lizhi 
AU  - Xu, Hui 
AU  - Wang, Yu 
AU  - Liu, Nannan 
AU  - Chen, Shangping 
AU  - Shi, Xing 

TI  - Investigation of Electrical Parameters of Fresh Water and Produced Mixed Injection in High-Salinity Reservoirs
T2  - Fluid Dynamics \& Materials Processing

PY  - 2023
VL  - 19
IS  - 10
SN  - 1555-2578

AB  - Assuming a reservoir with a typical salt-lake background in the Qaidam Basin as a testbed, in this study the variation law of the rock electrical parameters has been determined through water displacement experiments with different salinities. As made evident by the results, the saturation index increases with the degree of water injection. When the salinity of the injected water is lower than 80000 ppm, the resistivity of the rock sample first decreases, then it remains almost constant in an intermediate stage, and finally it grows, thereby giving rise to a ‘U’ profile behavior. As the salinity decreases, the water saturation corresponding to the inflection point of the resistivity becomes lower, thereby leading to a wider ‘U’ type range and a higher terminal resistivity. For different samples, higher initial resistivity of the sample in the oil-bearing state, and higher resistivity after low-salinity water washing are obtained when a thicker lithology is considered.
KW  - High salinity reservoir; mixed injection; saturation index; resistivity; electrical parameters

DO  - 10.32604/fdmp.2023.028115