论文部分内容阅读
在塔里木盆地满西寒武系—下奥陶统油气系统中已发现了哈得4石炭系油田、乡3井奥陶系和石炭系油气藏以及东河塘石炭系、侏罗系油田;烃源岩为寒武系—下奥陶统,成藏关键时刻在喜山期;油气沿断裂向上运移至石炭系底不整合面后,主要沿石炭系东河砂岩输导层运移,遇断层可进一步向上覆地层运移;油气系统中储层正常压力分布区有利于油气聚集;油气藏除构造型外,还有地层、岩性、构造—地层复合型。该油气系统的确定拓展了寻找以寒武系—下奥陶统为主力烃源岩的黑油油藏的新领域。
In the Manxi-Cambrian Lower-Middle Ordovician oil and gas system in the Tarim Basin, there have been discovered the Carboniferous Huddock oilfield, the Ordovician and Carboniferous reservoirs of the No.3 well, and the Carboniferous and Jurassic oilfields of the Dongheitang reservoir. The hydrocarbon source The rocks are Cambrian-Lower Ordovician, and the key moment of hydrocarbon accumulation is in the Himalayan period. After the oil-gas migration up the fault to the unconformity of the Carboniferous basement, it mainly migrates along the transport layer of the Carboniferous Donghe sandstone and encounters faults And can be further transported to the overlying strata. The normal pressure distribution of the reservoir in the oil and gas system is conducive to the accumulation of oil and gas. In addition to the structural type, the oil and gas reservoirs include stratigraphic, lithology and structural-stratigraphic composite types. The identification of this hydrocarbon system has expanded the search for new areas of black oil reservoirs with Cambrian-Lower Ordovician source rocks.