Application of RPM Logging for Reservoir Dynamic Monitoring at M Oilfield of Offshore

Abstract

With the gradual depth exploit of residual oil in offshore oilfield, RPM logging are using widely in reservoirs dynamic monitoring , the process of logging RPM affected by lithology, porosity, borehole fluid and other factors, so we must do some correction for it. But M oilfield has a special well structure of gravel pack, therefore, some correction made in domestic are not suitable for application in the offshore reservoirs of gravel pack, Thus author design parallelogram method to obtain water holdup and water saturation , by comparing the calculated results with the PLT data, it is found that the error in a controllable range, and also design volumetric model to corrected formation capture cross section, by using the corrected capture cross section establish model with lithology; electrical property, then compares it with the model which corrected before, it improves the model accuracy a lot. By comparing the water saturation which calculated by corrected capture cross section with and the water saturation which obtained by the PLT data interpretation , It is found that the accuracy increased more than 6%,it provides a new method to instruct the RPM data interpretation.

Comprehensive correction method of airtight coring saturation based on core classification

“…Freezing and preserving the core before the test will cause the volume to expand and then reduce the saturation. In the process of measurement, the influence of uncontrollable factors such as equipment and human operation process leads to errors in the measurement results [20]. On the other hand, the constant existence of capillary force increases the additional flow resistance of the core, so the oil-water saturation obtained in the displacement experiment will also be lost [19,[22][23][24][25].…”