Analysis of Diagenetic Process and Dynamic Reservoir Assessment

Abstract: The depth of the lower part of Enping Fm., Enping Sag is over 3 800 meters now, and the intensity of diagenesis is at the B period of middle diagenetic stage. Of course, it is a basic task that the lower part of the Enping Fm. is assessed objectively. Based on the numerous observations on thin sections and SEM analyses, the diagenetic sequences of Enping Formation, Enping Sag has been created. Also, we have found out the main controlling diageneses that affect the reservoir property strongly: first, compaction is the key factor that results in the reduction of porosity; second, the denudation of the acid fluid is the main reason that causes the enhancement of porosity partly.