蟠龙油田长2油藏油气富集控制因素

RESERVOIR FORMING CONDITIONS AND ENRICHMENT RULES OF CHANG 2 OIL-BEARING BED IN THE PANLONG OILFIELD

蟠龙油田延长组长2油层属典型的低渗—超低渗储层;富含有机质的烃源岩为油气的生成提供了物质保障;广泛发育的泛滥平原相、沼泽相泥岩为油气成藏提供了良好的盖层条件。研究认为长2油藏以构造—岩性复合油气藏为主,油气富集主要受物性、岩性及岩相等因素影响。有利的沉积相带、储层物性及鼻状隆起构造共同控制了长2油藏的油气分布。

The chang2 reservoir group is typical low and ultra penetration of Panlong Oilfield. Material security has been offered from hydrocarbon source rock of containing organic matter for the generation of oil and gas. The flood plain faces and swamp faces mudstone provided a good cap rock condition for reservoir forming. The results show that the main type of reservoir forming is structural - lithologic reservoirs. The capability of beating oil and gas has been controlled by reservoir properties, lithologies and lithofacies. The sedimentary face zone, reservoir physical properties and nose fold background are the main factors of control hydrocarbon accumulation in chang2 Oil-bearing bed.