Petrophysical Evaluation Of Gas Shale Reservoirs

This chapter focuses on the petrophysical evaluation methods of shale formations. It first defines the key properties for evaluation of potential gas shale intervals. Then the chapter explains the available techniques for measuring these parameters. The key properties for a shale formation to be considered as a potential gas shale layer are discussed. Petrophysical evaluation of gas shale reservoirs is complex due to the variable mineral composition. The available laboratory methods used specifically for petro-physical measurements of gas shale samples are explained. This is followed by a brief explanation of the well log signatures and well log interpretation in the gas shale reservoirs. The main application of acoustic measurements for gas shale evaluation is to provide (the) mechanical properties for gas shale reservoirs. In general, formation water salinity of the shale formations cannot be obtained directly since these layers do not produce formation water normally.