油气储层研究中心” 30th Weekly Seminar
Topic; Diagenesis of carbonates Rocks
Name; Muhammad Kashif
Date; 2016年4月10日
I am Muhammad kashif, from Pakistan and I am Ph.D student at China university of Petroleum, Huangdao, Qingdao, East China, the topic of my presentation is Diagenesis of Carbonates rocks, in this topic I do special emphasis on diagenetic processes especially dissolution effect on carbonates rocks.
Diagenesis is basically a process that brings changes in sediments during burial and lithification. The physical and chemical changes that alter the characteristics of sediment after deposition are referred to as diagenesis (Milliken 2003). 1st I briefly discuss about carbonates rocks, their types, Chemistry, textures, their mineralogy and classifications, then discuss about the different diagenetic process, their formation mechanism and explain with suitable examples and diagrams from outcrop as well as thin section studies, I also discuss their effect on the reservoir quality and as well as their advantages and disadvantage for reservoir rock.
There are three major diagenetic process which are 1st- Physical Diagenesis that includes Compaction, 2nd Chemical Diagenesis that includes Cementation, Authigenesis, Recrystallization, Inversion, Replacement and Dissolutions, and 3rd Biological Diagenesis that includes Bioturbation. Presentation also emphasis on water resources for dissolutions, diagenetic problems, diagenetic environment, major effect of diagenesis, diagenesis effect on Reservoir quality, and at the last I discuss the methodology and experimental work for Reservoir evaluation such as, thin section study, logging data, Bore hole images, Nuclear and magnetic resonance (NMR), SEM, X. Ray diffraction, Cathodo luminescence (CL), Chemical stable Isotopes and X. Ray Computed Tomography (CT).
