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以文东地区沙三中储层流体包裹体样品分析为基础,对油气充注史、古温压状态及成藏效应进行了系统研究,提出晚期超压成藏对于研究区油气藏形成作用显著,东濮老区深部勘探重点应放在超压地层.研究结果表明:区内流体包裹体较为发育.综合岩相、荧光观测显示有两期不同成熟度油气充注.由包裹体测温法结合埋藏史和热演化分析、自生伊利石K-Ar法测年确定油气为两期成藏,即古近纪末抬升剥蚀期和新近纪末期—第四纪.文东盐间属超压油气藏,现今原始地层压力系数可达1.7~1.9.流体包裹体热动力学PVTX模拟关键成藏期的古压力系数大都为1.3~1.4,揭示晚期油气大规模充住时为超压环境.现场实测资料表明地层压力增高,储层含油气性明显增加,故东濮老区深层超压体系值得进一步研究.
Based on the analysis of fluid inclusions in the reservoir of the Third Member of Shahejie Formation in the Eastern Wendong Region, a systematic study of hydrocarbon charge history, paleoclimate pressure and hydrocarbon accumulation was carried out. It is suggested that the late overpressure accumulation had a significant effect on the formation of oil and gas reservoirs in the study area , And the deep exploration in Dongpu Old District should be focused on the overpressure strata.The results show that the fluid inclusions in the area are well developed and the comprehensive lithofacies and fluorescence observations show that there are two periods of oil and gas filling with different maturity.According to the inclusion temperature measurement Burial history and thermal evolution analysis, the self-generated dating method of K-Ar dating determined that oil and gas were two phases of accumulation, that is, uplifting and denudation in the late Paleogene and the end of Neogene- Quaternary. , The original formation pressure coefficient can reach 1.7 ~ 1.9 now.The thermodynamic PVTX of the fluid inclusions is mostly 1.3 ~ 1.4, indicating that the overpressure environment is the over-pressure environment during the late filling of large-scale oil and gas. It indicates that the pressure in the formation increases and the oil and gas in the reservoir obviously increases. Therefore, the deep overpressure system in the old area of Dongpu deserves further study.