Table Mesa and Rattlesnake Fields are located on the Four Corners Platform, New Mexico, between the Paradox Basin to the north and San Juan Basin to the south. Diagenesis is extensive and includes partial dissolution and replacement of ooids, partial silicification of allochems and matrix, and filling of pore space with large, blocky calcite. Pore types include interparticle, intraparticle, and vuggy, with much porosity lost to late cementation. Porosity is greatest in cycles interpreted as regressive deposits with meteoric and burial diagenesis being most significant to porosity enhancement. Sea level and depositional history are shown to be significantly useful in predicting patterns of porosity development and destruction. These results are directly applicable to other economically important carbonate platforms.

The Desmoinesian Marmaton Group, along the southern portion of the Anadarko Basin in the Granite Wash, comprises over 2,000 feet of stacked tight sandstones and conglomerates, containing unconventional reservoirs. Uncertainty around facies variability and lateral continuity of these reservoirs represents challenges to accurate reservoir characterization due to laterally restricted submarine fan systems, and mountainront faulting. This study examines 206 wire-line well-log suites and nine ice-house flooding surfaces across an 810-square mile study area to frame fine-scale sequences, track facies changes, and estimate fault timing and duration. This high-resolution stratigraphic framework comprises a hierarchy of cycles: one third-order, three fourth-order, and eight fifth-order cycles; these were mapped across fault blocks. Mapping at the fifth-order scale documented previously un-published faults, and showed that movement occurred during two separate fifth-order cycles. Within the stratigraphic framework, well log trends, calibrated to core descriptions, enabled prediction of depositional environments in uncored wells.