Petroleum Science >2013,??Issue 3:??314-326 DOI: https://doi.org/10.1007/s12182-013-0280-7
Transient fluid flow in the Binbei district ofthe Songliao Basin, China: Evidence fromapatite fission track thermochronology Open?Access
文章信息
作者：Xiang Caifu,Martin Dani?ík and Feng Zihui1
作者單位：
State Key Laboratory for Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China 2 College of Geosciences, China University of Petroleum, Beijing 102249, China;3 Department of Earth & Oceanic Sciences, University of Waikato, Hamilton 3105, New Zealand;4 Prospecting and Exploration Institute of Daqing Oil Field, Heilongjiang 163458, China
投稿時(shí)間：2011-11-06
引用方式：Xiang, C., Dani?ík, M. & Feng, Z. Pet. Sci. (2013) 10: 314. https://doi.org/10.1007/s12182-013-0280-7
文章摘要
The Songliao Basin is famous for the Daqing Oilfield, the biggest in China. However, no
economic hydrocarbon reservoir has been found in the northeastern Binbei district. Its thermal history,
which is of great importance for hydrocarbon generation and migration, is studied with apatite fission
track (AFT) thermochronology. Samples with depositional ages of the late Cretaceous (~108–73 Ma) are
analyzed. The AFT ages of the samples from reservoir rock (depositional age > 76.1 Ma) fall between
the late Cretaceous (72±5 Ma) and the early Eocene (41±3 Ma) period, indicating their total annealing
after deposition. In contrast, two samples from the main seals of the Qingshankou (depositional age
> 89.3 Ma) and the Nenjiang Formation (depositional age > 73.0 Ma) are not annealed or partially
annealed (AFT ages of 97±9 Ma and 70±4 Ma, respectively). Because the maximum burial temperature
(<90 °C) evidenced by low vitrinite reflectance (Ro<0.7) is not high enough to account for the AFT total
annealing (110-120 °C), the transient thermal effect arising from the syntectonic fluid flow between the
late Cretaceous and the early Eocene is proposed. Transient thermal effects from fluid flow explains the
indicated temperature discrepancies between the AFT thermometer and the Ro thermometer because the
transient thermal effect from the fluid flow with a temperature high enough (110-120 °C) to anneal the
AFT thermometer does not last long enough (104-105 yrs.) for an enhancement of the Ro (minimum 106-
107 yrs. under the same temperature). This indicates that dating thermal effect from fluid flow might be
a new means to reconstruct the tectonic history. It also answers why the samples from the main seals are
not annealed because the seals will prohibit fluid flow and supply good thermal insulation. The large-scale
fluid flow in the Binbei district calls for a new idea to direct the hydrocarbon exploration.
economic hydrocarbon reservoir has been found in the northeastern Binbei district. Its thermal history,
which is of great importance for hydrocarbon generation and migration, is studied with apatite fission
track (AFT) thermochronology. Samples with depositional ages of the late Cretaceous (~108–73 Ma) are
analyzed. The AFT ages of the samples from reservoir rock (depositional age > 76.1 Ma) fall between
the late Cretaceous (72±5 Ma) and the early Eocene (41±3 Ma) period, indicating their total annealing
after deposition. In contrast, two samples from the main seals of the Qingshankou (depositional age
> 89.3 Ma) and the Nenjiang Formation (depositional age > 73.0 Ma) are not annealed or partially
annealed (AFT ages of 97±9 Ma and 70±4 Ma, respectively). Because the maximum burial temperature
(<90 °C) evidenced by low vitrinite reflectance (Ro<0.7) is not high enough to account for the AFT total
annealing (110-120 °C), the transient thermal effect arising from the syntectonic fluid flow between the
late Cretaceous and the early Eocene is proposed. Transient thermal effects from fluid flow explains the
indicated temperature discrepancies between the AFT thermometer and the Ro thermometer because the
transient thermal effect from the fluid flow with a temperature high enough (110-120 °C) to anneal the
AFT thermometer does not last long enough (104-105 yrs.) for an enhancement of the Ro (minimum 106-
107 yrs. under the same temperature). This indicates that dating thermal effect from fluid flow might be
a new means to reconstruct the tectonic history. It also answers why the samples from the main seals are
not annealed because the seals will prohibit fluid flow and supply good thermal insulation. The large-scale
fluid flow in the Binbei district calls for a new idea to direct the hydrocarbon exploration.
關(guān)鍵詞
-
Apatite fission track, vitrinite reflectance, transient fluid flow, Binbei district, SongliaoBasin