The diagenetic processes that control the distributions of cements and porosity within reservoirs are poorly known. However, two lines of reasoning suggest that cement and porosity distributions should reflect both the geometry of the depositional units and the geometry of faults and folds. First, diagenetic processes are stabilization processes. That is, the reactive components in the sediments interact with the subsurface environment to form more stable compounds. Because the original distribution of reactive components was controlled by the depositional systems, some spatial relation between the depositional architecture and the diagenetic products might be expected. Second, many of the processes that precipitate cement or modify porosity involve dissolution, transport, and re-precipitation by subsurface waters. Hydrology is strongly controlled by depositional architecture and tectonic structure, so the distribution of dissolution and precipitation products must also be controlled by these factors.
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Depositional and Structural Controls on the Diagenesis of Lockhart Crossing Reservoir (Wilcox); Gulf Coast of Louisiana (U.S.A)
Steven J. Johansen
- Springer New York
- Chapter 6