The Anadarko Basin of the North American Midcontinent has been explored by the hydrocarbon industry for decades, and recent efforts have created an opportunity to analyze robust modern geologic datasets for investigating the depositional and stratigraphic architecture of Mississippian (Lower Carboniferous) reservoirs in the region. Core-based facies analysis coupled with the integration of geophysical well logs and previous biostratigraphic studies are the fundamental building blocks for investigating the evolution of a carbonate depositional system to a mixed carbonate–siliciclastic system. This evolution was facilitated by global climatic changes during the transition from greenhouse to icehouse conditions during the assembly of Pangaea. Initial deposition in the region was characterized by marine transgression and followed by a period of stabilization, with aggradation of the carbonate system on the Burlington shelf and coeval deposition of biostromal sponge gardens and outer ramp facies in the study area. This event was followed by progradation of the carbonate system, establishing the Meramecian (Viséan) Boardman ramp margin in north-central Oklahoma, where thick successions of carbonate shoal and proximal storm deposits accumulated. The final depositional episode was characterized by an abrupt transition from carbonate to siliciclastic deposition, in which thick successions of Chesterian (Viséan-Serpukhovian) siliciclastics prograded from the Boardman ramp margin into the Anadarko Basin. As a result of this depositional evolution, the reservoir architecture changes across the Anadarko Basin as progradational proximal carbonate facies transition to storm-dominated ramp margin conditions, and finally to the more prolific unconventionally targeted siliciclastic siltstone and mudstone facies of the outer ramp.

碳氢化合物行业已经对北美中部大陆的阿纳达科盆地进行了数十年的勘探，最近的努力创造了一个机会来分析强大的现代地质数据集，以研究该地区密西西比系（下石炭统）储层的沉积和地层结构。基于岩心的相分析结合地球物理测井曲线和先前的生物地层研究，是研究碳酸盐沉积系统向混合碳酸盐-硅质碎屑系统演化的基本组成部分。盘古大陆聚集期间从温室条件过渡到冰库条件期间的全球气候变化促进了这种演变。该地区最初沉积的特点是海侵，随后是一段稳定期，伯灵顿陆架上碳酸盐系统的沉积以及研究区生物基质海绵园和外斜坡相的同时沉积。此事件之后是碳酸盐系统的进积，在俄克拉荷马州中北部建立了 Meramecian (Viséan) Boardman 坡道边缘，在那里积累了厚厚的碳酸盐浅滩和近端风暴沉积物。最后沉积期的特点是从碳酸盐沉积到硅质碎屑沉积的突然转变，其中厚厚的切斯特阶（Viséan-Serpukhovian）硅质碎屑岩从博德曼坡道边缘推进到阿纳达科盆地。由于这种沉积演化，整个阿纳达科盆地的储层结构发生了变化，因为进积的近端碳酸盐岩相转变为风暴主导的缓坡边缘条件，并最终过渡到外缓坡更丰富的非常规目标硅质粉砂岩和泥岩相。