Differential (re-)activation and hydrocarbon enrichment of segments of intracratonic strike-slip faults in the central Tarim Basin, northwestern China, by Zhuo Liu, Jinqiang Tian, Fang Hao, Xianzhang Yang, Ke Zhang, Yongquan Chen, Xiaoxue Wang, Feifei Yuan, Li Quan, Ping Wang, and Fuyun Cong. Intracratonic strike-slip faults are pivotal in controlling hydrocarbon migration and accumulation within deep carbonate reservoirs, yet their multiphase reactivation histories and spatio-temporal coupling with hydrocarbon charging remain poorly constrained. This study integrates calcite U-Pb geochronology, fluid inclusion microthermometry, and fluorescence spectroscopy to resolve the evolution of strike-slip fault systems in the ultradeep Ordovician strata of the Tarim Basin. This approach has elucidated the comprehensive activity history of these faults, provided absolute age constraints on oil charging episodes, and identified the principal timing of current oil reservoir charging.

Statewide assessment of CO2 storage resources for the lower Paleozoic strata, Oklahoma: Timbered Hills and Arbuckle Groups, by Anna M. Turnini and Matthew J. Pranter. The Arbuckle and Timbered Hills Groups (Arbuckle zone) exist across the state of Oklahoma at depths adequate for carbon capture, utilization, and storage. It is also a hydrocarbon-producing reservoir where structurally trapped, and a saltwater disposal zone for oil field wastewater across north-central Oklahoma. Using well information from 80,800 wells for the structural model and more than 403 wells with log ASCII standard format with modern well logs, a detailed three-dimensional lithology model was generated for the Arbuckle zone across Oklahoma.

Statewide assessment of CO2 storage resources for the lower Paleozoic strata, Oklahoma: Simpson Group, Viola Limestone and Hunton Group, by Anna M. Turnini and Matthew J. Pranter. Like the Arbuckle Group, the Ordovician reservoirs and Hunton Group in Oklahoma exist over most of the state, at depths adequate for carbon capture, utilization, and storage. The Ordovician reservoirs include the Viola Limestone and Simpson Group and lie above the Arbuckle Group. Across northwestern and central Oklahoma, the Hunton Group, Ordovician sandstones, and Arbuckle Group all are present, providing the unique ability to store in the three reservoirs from one well bore, and at reasonable depths of less than 10,000 ft. Oklahoma has the potential to be one of the largest carbon hubs in North America.

Genetic mechanisms of sparry calcite in lacustrine shale and its significance for fluid-rock interactions and reservoir formation, by Yingchang Cao, Yuegang Wang, Zhouhai Xiong, Chao Liang, Shuyu Wang, Keyu Liu, Helge Hellevang, and Wanlu Han. Sparry calcite, which is extensively distributed in shale, is crucial for inverting burial evolution processes. The carbonate-rich (almost 50%) shale of the Jiyang depression, China, has complex sparry calcite types. These sparry calcites serve as carbonate-rich shale storage spaces and perform as indicators of fluid-rock interactions. Sparry calcites sampled from the Jiyang depression were analyzed and divided into two types: granular and columnar. The formation mechanisms of these types provide important insights into the evolution process of calcite in shale and elucidate the relationship between the synergistic effect of multiple components and the formation of shale oil reservoirs.