Simulation Study on Clastic Rock Diagenetic Compaction

Key words: 
• compaction /
• bearing pressure /
• porosity /
• permeability /
• dissolution

Abstract: A set of new equipment has been designed and applied to simulate the diagenetic compaction. Medium quartz sand is selected as material to carry out the experiment. In order to do further research, physical and chemical change have both been detected, and some new conclusion have been reached. During compaction, the porosity and permeability are not varied regularly, and it can be divided into to section, a sudden change section and a uniform change section. In the uniform change section, the porosity decreases with the increase of the pressure, and they have a linear relation. The permeability decreases with the increase of the pressure either, and they have an exponential relation. The porosity and permeability also have semilogarithmic relation. The testing and analysis of solution manifest that compaction is not only a physical change，but also a chemical change, indicating that the dissolution may occurs even at the lower burial depth. 