PREDICTION METHOD OF PORE PRESSURE OF SHALE IN SONGLIAO BASIN

摘要

Serious wellbore instability frequently occurs during drilling operations in shale formations. Selection of safe mud parameters to alleviate shale instability problems during drilling operations can benefit from predictive models. Only a few experimental measurements and analysis of model predictions are available. In this paper, pore pressure transmission test on shale is conducted and pore pressure changes in the shale sample under hydraulic and chemical loading is measured. Comparison with experimental data shows that the simulation results are in good agreement with the actual pressure measurements in the test. This result provides further validation for the theoretical model.