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塔河油田三叠系圈闭类型多样,构造类圈闭总体上构造幅度低、闭合面积小,岩性圈闭受控于相变和砂体尖灭,上、中、下3个油组储层物性好,3套地区性盖层形成3大套储盖组合,形成的油气藏类型多样,各油组之间油气藏多表现为上轻下重的特征,下油组以油藏为主,中上油组以凝析气藏为主,各油组具有独立的油、水或气、水界面。三叠系油气藏形成较晚,具典型次生油气藏特点,油气主要沿断至下伏油气藏的断裂运移上来,沿三叠系输导层继续横向运移。印支—燕山期是三叠系圈闭形成的重要时期,在喜马拉雅期受构造反转调整改造。三叠系油气成藏主要受控于两个主要因素,一是断裂和输导层——油气运移的通道,二是有效的储盖组合。
The Triassic traps of Tahe Oilfield are diverse in traps. The tectonic traps generally have low tectonic amplitudes and small closed areas. The lithologic traps are controlled by phase transitions and pinnacles and the upper, middle and lower oil reservoirs The reservoir properties are good. Three sets of reservoir cover-cap assemblages are formed in three sets of regional cap rocks, forming various types of reservoirs. The reservoirs between the two oil-bearing formations are characterized by light weight and heavy weight. The lower oil reservoirs are mainly oil reservoirs . The Zhongsou Oil Group is dominated by condensate gas reservoirs. Each oil group has its own oil, water or gas-water interface. Triassic hydrocarbon reservoirs formed later with the characteristics of typical secondary oil and gas reservoirs. The oil and gas mainly migrated along the fault to the underlying hydrocarbon reservoirs and continued to migrate along the Triassic conductive layers. The Indosinian-Yanshanian period is an important period during which the Triassic traps formed. During the Himalayan period, the structure was reversed and reconstructed. Triassic hydrocarbon accumulation mainly controlled by two main factors, one is the fracture and the conduction layer - the migration of oil and gas channels, and the second is an effective reservoir-cap combination.