深层—超深层走滑断裂带储层流体来源与油气成藏过程研究——以塔里木盆地富满油田为例

doi:10.13809/j.cnki.cn32-1825/te.2024.04.004

Abstract

Abstract:

The study of the filling veins in deep reservoirs within the strike-slip fault zone in the north of Fuman Oilfield utilizes a range of methods including petrographic characteristics, analysis of rare earth elements andSr（strontium） isotopes, fluorescence spectra of oil inclusions, microscopic thermodynamics, and U-Pb isotopic dating of carbonate rocks. The findings reveal two stages of calcite vein formation in this area. These veins originate from the formation water of the middle and Lower Ordovician sources, with no evidence of oxidizing fluid intrusion, suggesting that the deep to ultra-deep oil and gas reserves have maintained good sealing properties in later stages. Furthermore, based on the burial history deduced from inclusions and low U-Pb isotope dates from carbonate rocks, it has been determined that there are three distinct stages of hydrocarbon charging in the deep Ordovician strata of the northern strike-slip fault zone in the Tarim Basin. These stages correspond to （459±7.2） Ma（middle Caledonian）, （348±18） Ma（early Hercynian）, and 268 Ma（late Hercynian）. It is noted that the early Hercynian period was the key phase for hydrocarbon accumulation in the deep and ultra-deep carbonate rocks in the north of Fuman Oilfield, with a significant correlation observed between oil and gas charging and fault activity.

Key words: Tarim Basin, Fuman Oilfield, hydrocarbon accumulation process, fluid inclusion, U-Pb isotope dating, fluid evolution

CLC Number:

TE122

Yifan XUE,Zhigang WEN,Yahao HUANG, et al. Study on reservoir fluid source and hydrocarbon accumulation process in deep to ultra-deep strike-slip fault zone: A case study of Fuman Oilfield, Tarim Basin[J]. Petroleum Reservoir Evaluation and Development, 2024, 14(4): 549-559.

Figures/Tables 10

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不同期次样品	La（镧）	Ce（铈）	Pr （镨）	Nd（钕）	Sm（钐）	Eu（铕）	Gd（钆）	Tb（铽）	Dy（镝）	Y （钇）	Ho（钬）	Er （铒）	Tm（铥）	Yb（镱）	Lu（镥）	Fe/ Mn	ΣREE	δCe	δEu	LREE/HREE
C1	0.344	1.796	0.262	0.241	0.312	0.179	0.143	0.120	0.124	1.027	0.118	0.096	0.068	0.059	0.068	7.405	4.936	5.932	0.786	3.942
C1	0.132	0.842	0.141	0.130	0.109	0.077	0.087	0.032	0.029	0.421	0.033	0.054	0.037	0.033	0.023	6.985	2.172	6.165	0.790	4.350
C1	0.126	1.022	0.180	0.139	0.142	0.181	0.100	0.059	0.062	0.539	0.069	0.061	0.030	0.025	0.031	6.219	2.528	6.674	1.501	4.097
围岩	0.161	1.156	0.189	0.180	0.172	0.180	0.118	0.099	0.062	0.528	0.062	0.049	0.049	0.048	0.036	17.370	2.889	6.604	1.244	3.906
围岩	0.124	0.848	0.146	0.132	0.108	0.044	0.049	0.058	0.048	0.351	0.029	0.014	0.010	0.026	0.032	13.764	2.032	6.282	0.567	5.277
C2	0.013	0.080	0.017	0.010	0.014	0	0.007	0.003	0.006	0.037	0.004	0.005	0	0.003	0.001	2.535	0.205	5.168	0	4.609
C2	0.060	0.295	0.041	0.034	0.023	0.004	0.012	0.010	0.002	0.055	0.006	0.007	0.003	0.004	0.005	2.822	0.636	5.837	0.250	9.303
C2	0.018	0.108	0.024	0.015	0.019	0.009	0.009	0.003	0.004	0.040	0.008	0.003	0.005	0.007	0.002	2.861	0.266	5.183	0.661	4.748
围岩	0.008	0.056	0.011	0.007	0.002	0.021	0.009	0.013	0.008	0.046	0.006	0.004	0.004	0.004	0	19.146	0.168	5.807	3.806	2.197
围岩	0.008	0.058	0.007	0.012	0.003	0.005	0.013	0.005	0.004	0.045	0.006	0.002	0.011	0.003	0.007	21.908	0.175	7.846	0.635	1.816

Study on reservoir fluid source and hydrocarbon accumulation process in deep to ultra-deep strike-slip fault zone: A case study of Fuman Oilfield, Tarim Basin

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