Petroleum Science >2013,??Issue 3:??303-313 DOI: https://doi.org/10.1007/s12182-013-0279-0
Origin and accumulation of high-maturityoil and gas in deep parts of the BaxianDepression, Bohai Bay Basin, China Open?Access
文章信息
School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China 2 Huabei Oilfield Company of PetroChina, Renqiu, Hebei 062552, China;1 School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;2 Huabei Oilfield Company of PetroChina, Renqiu, Hebei 062552, China;1 School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;2 Huabei Oilfield Company of PetroChina, Renqiu, Hebei 062552, China;2 Huabei Oilfield Company of PetroChina, Renqiu, Hebei 062552, China;2 Huabei Oilfield Company of PetroChina, Renqiu, Hebei 062552, China;2 Huabei Oilfield Company of PetroChina, Renqiu, Hebei 062552, China
文章摘要
of 5,641 m to 6,027 m and 190 °C to 201 °C in the Niudong-1 Well, representing the deepest and
hottest commercial hydrocarbons discovered in the Bohai Bay Basin in eastern China. This discovery
suggests favorable exploration prospects for the deep parts of the basin. However, the discovery raises
questions regarding the genesis and accumulation of hydrocarbons in deep reservoirs. Based on the
geochemical features of the hydrocarbons and characteristics of the source rocks as well as thermal
simulation experiments of hydrocarbon generation, we conclude that the oil and gas were generated from
the highly mature Sha-4 Member (Es4) source rocks instead of thermal cracking of crude oils in earlier
accumulations. The source kitchen with abnormal pressures and karsted carbonate reservoirs control the
formation of high-maturity hydrocarbon accumulations in the buried hills (i.e., Niudong-1) in conjunction
with several structural–lithologic traps in the Es4 reservoirs since the deposition of the upper Minghuazhen
Formation. This means the oil and gas exploration potential in the deep parts of the Baxian Depression is
probably high.
关键词
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High mature oil and gas, origin, accumulation, deep part of Baxian Depression