...WENBO ZHENG; HONGWEN DENG Abstract The Zhuhai Formation of the Huizhou Oilfield has been interpreted as being deposited in a tide-dominated estuarine setting. This paper uses stratigraphic principles, cores and logging data to analyse the facies changes of tidal sedimentation in response...

.... Crude oil in the northern area of the Baiyun Sag is more mature than samples in the eastern part of the sag. Despite limited source rock data, we were able to conclude that the crude oil samples were derived mainly from the Enping Formation; other potential source rocks of the Wenchang and Zhuhai...

... the Zhujiang formation give a weighted mean age of 11.4 ± 0.5 Ma (1σ), in agreement with an age of 12.1 ± 1.1 Ma in the first three steps of the sample from the Zhuhai Formation. These dates are interpreted as being caused by the formation of fine authigenic illite and therefore indicative of the maximum age...

... condensates and oil in the study area originated from Eocene Enping Formation source rocks, whereas the condensate fluids in the eastern area originated from the Enping and Zhuhai Formations. The condensate fluids have a relatively low thermal maturity with a calculated vitrinite reflectance equivalent...

... environment and the Oligocene Zhuhai Formation (E 3 z) was deposited in a shallow marine environment. The Oligocene Enping Formation (E 3 e), which was believed to be deposited in a freshwater environment, was actually deposited in a brackish water environment. Mechanisms of salinity increase during the non...

...Figure 12 —Events chart of the Wenchang-Zhuhai(.) petroleum system. SH+WC = Shenhu and Wenchang Formations, EP = Enping Formation, ZH = Zhuhai Formation, ZJ = Zhujiang Formation, HJ = Hanjiang Formation, Y+W = Yuehai and Wanshan formations, Q = Quaternary. ...