Evaluation of Ranikot Sandstone Formation, Punjab Platform Basin Pakistan

Abstract

The Ranikot sandstone Formation was investigated using TOC and Rock-Eval pyrolysis measurements. Ranikot Formation encountered in Bijnot well, Fort Abbas has been evaluated, which lies in Bahawalpur, middle Indus basin, particularly in Punjab platform. Analysis has been performed on sandstones, twenty well cutting samples of Ranikot Formation has been evaluated. Formation is predominantly sandstone with interbeds of shale. The analysed samples contains TOC ranging from 0.76-3.1 wt.%, The S2 values of Rock-Eval shows poor potential with values ranging from 0.46-1.05 mg HC/g rock. The samples have low hydrogen index values ranging from 21-113 mg HC/g TOC. Kerogen is predominantly Type III land derived organic matter. The analysed samples have Tmax ranging from 413-509 °C. The upper part of formation from 490-560m depth generally exhibits good to very good TOC content and is in the transition between immature and mature zone (Tmax 430-431 °C). The genetic potential in the entire rock unit is poor < 2.0 mg HC/g rock. On the basis of analysis performed the studied samples have shown that the formation has poor potential.

Organic geochemical and petrographical characteristics of the major lower cretaceous petroleum source rock (Makhul Formation) in Kuwait - Arabian Gulf

“…Four samples from middle and top Ritqa, 4 samples from middle Raudhatain, 5 samples from bottom Burgan, and 4 samples from middle Minagish. These samples were treated by pyrolysis Rock-Eval 6 (RE6), using standard bulk rock method, which the sample is heated at 300℃ for 5 min., followed by the heating ramp of 300-650℃ at a rate of 25℃/minute (Peters, 1986;Shah & Ahmed, 2018;Shah & Ahmed, 2020). For kerogen elemental analyses and kerogen isolation examination, the samples were treated using standard acid maceration techniques using HCL and HF to calculate the amount of TOC contents, and the type of the organic matter as well as an environment of deposition,…”