Empirical Model of Thailand Shale Compaction Based on Geological Age Classification

Abstract

Shale is a clastic rock formed from small clay particles, most of the shales contain clay minerals with high presentation and basic types of clay that are contained in the shale are different, including kaolinite, illite, and montmorillonite clays, each type of clay has a different effect on the different reservoirs and sources of different formations (Selley, et al, 2015). Shale is an important sedimentary rock because it is one of the source rocks where oil and gas formed and due to its low permeability, shale also acts as a trap where oil and gas are trapped. The presence of shale is also very abundant in most of the sedimentary basins (Bjørlykke, 2010). However, not all shales have oil and gas potential because other several conditions also need to be considered, such as the level of maturity, the organic matter content, the thickness of the source rock, mineralogy, pore pressure, and rock brittleness (Deshpande, 2008). Shale, a clastic rock that contains an amount of clay. The interaction of tiny particles with clay minerals have a significant impact on the sedimentation process, such as erosion, transport, deposition, and compaction due to the nature of the clay itself, as it can influence grain mechanical strength and pore fluid composition (Bjrlykke, 2010)