Characteristics of Source Rock in the Northern Sag Zones of Zhu III Depression, Pearl River Mouth Basin

Oil and gas mainly originated from a few petroliferous sags within the same basin, the volume and the characteristics of hydrocarbon source rock control the quantity and size of petroleum resource in the basin. By analyzing and comparing the organic abundance, kerogen type, and source rock maturity, the study discussed source rock characteristics and differences of Wenchang A sag and Yangjiang sag. The results indicate that organic matter abundance of Enping formation is high in Wenchang A sag, and its contain gas-prone kerogen, which has high thermal evolution degree and has reached the peak stage of gas, but source rock of Yangjiang Sag is under the poorer hydrocarbon generation condition, so Wenchang A sag is hydrocarbon-rich sag which has great hydrocarbon generation potential and resources prospective.