Potential for Large Discoveries23 Jul 2018 11:54
From GeoExPro...
Potential for Large Discoveries:
Clear evidence of the potential for a working petroleum system gathered by geoscientists from Petro Matad has highlighted the opportunity for large discoveries.
Across large areas of Block IV and V, fieldwork has proven the existence of syn-rift Upper Jurassic-Lower Cretaceous lacustrine organic-rich shales interbedded with sandstones in the Shine Khudag Formation. TOC of samples in the Khoid Ulaan Bulag oil shale, with a net shale thickness of 265m, can range from 1.7% to 27% type I-II kerogen, and has a maximum HI of 800. The thickness and quality can vary, so that at Tsagaan Suvarga the average TOC is 5.3% (1.7–10.6%), but net thickness is 900m and HI reaches 900.
At almost every outcrop, many of which may have been deposited in a marginal lake setting, source rock quality is sufficient to result in significant generation if mature. Outcrop maturity averages around 0.6% VR, marginally mature for generation. Basin modeling, however, suggests that in much of the subsurface the source will be mature, with onset of generation in the early Cretaceous following syn-rift subsidence and burial.