Tracing early-charged oils and exploration directions for the Wenchang A sag, western Pearl River Mouth Basin, offshore South China Sea

Evolution of nanoporosity in organic-rich shales during thermal maturation

“…Their locations were present in the Refs. [23][24][25]. A coal sample with a similar initial maturity (VRo = 0.56%) was also pyrolyzed under the same conditions as the three shales to give a measure of the thermal maturity of the shale samples at different pyrolysis temperatures.…”

Source rock characteristics and hydrocarbon expulsion potential of the Middle Eocene Wenchang formation in the Huizhou depression, Pearl River Mouth basin, south China sea

“…Sandstone beds with high porosity and permeability, in combination with marine shale, formed excellent reservoireseal assemblages (Fig. 2) (Zhu et al, 1999;Gong and Li, 2004;Zhou, 2011;Cheng et al, 2013).…”

The origin and distribution of crude oil in Zhu III sub-basin, Pearl River Mouth Basin, China

“…But it is generally accepted that E 2 w and E 3 e are the most important source rocks in the PRMB (Zhu et al, 1999;Kang and Feng, 2011). In the Wenchang A depression, E 3 e is confirmed to be the primary source rock (Huang et al, 2003;Fu et al, 2011;Cheng et al, 2013a). The E 3 e, which is dominated by mixed type II 2 and III kerogens, has total organic carbon (TOC) contents between 0.27% and 8.4% (Fig.4A) and hydrocarbon generation potential (S 2 ) between 0.02 and 16.4 mg/g with medium hydrogen indices (usually lower than 400 mg/g, Fig.5A).…”