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Paper Number: 1506

The ultra deep water of Bohai bay basin in Paleogene: Its significance of oil and gas

Li Yong1, Zhong Jianhua1, Ni Liangtian1, Ma Feng2, Shao Zhufu3,Sun Hongbin4, Liu Bao4, Sun Yu5, Liu Xuan5, Chen Bin1, Gao Yufei6, Li Junting6,Hao Bing1, Sun Ningliang1, Mao Cui7, Liu Chuang1, Sun Honghua1, Luo ke1

1.School of Geosciences, China University of Petroleum, Qingdao 266580,China; 1158782814@qq.com

2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing, 100083

3. Key Lab of Marine Hydrocarbon Resources and Environmental Geology, Qingdao, 266071

4. Institute of Exploration and Development of Liaohe Oilfield, Panjin, Liaoning, 124010;

5. Exploration and Production Research Institute, SINOPEC，Beijing, 100083;

6. CNOOC Research Center, Beijing, 100027;

7. College of Geosciences, Northeast Petroleum University, Daqing, 163318)

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Palaeo-water depth and its change with time is a key factor in oil and gas bearing basin analysis. In this paper, our research will focus on proxies for palaeo-bathymetry as obtained from the recent seismic interpretation complemented with sedimentary study. The palaeo water depth in Sha3 epoch of Paleogene was over 500m and even to 1290m in Bohai bay basin. This ultra deep water is an important factor to form the high quality source rock and associated turbidite and to form the tight oil traps or fluvial sandstone oil traps and delta sandstone oil traps in the lower water level stage. This ultra deep water is also the key factor to form the good source rocks and in turn to make the Bohai bay basin rich in oil and gas.

Figure 1: Clinoform on the Seismic profile from well S128 to N43 wells in Dongying sag, Bohai bay basin.

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