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基岩古潜山型油气藏是发育在不整合面之下的地层油气藏,往往分布于含油气盆地基底凸起带。在盆地盖层沉积前由于长期暴露地表,产生风化壳和裂缝,为后期油气的聚集提供了有利的场所。焉耆盆地种马场北断裂带经过多期构造演化,形成了向北部凹陷生烃中心逆冲的基岩叠瓦带(古潜山),侏罗系八道湾组烃源岩直接覆盖其上及其前缘,油源充足且保存条件较好;构造带东段基岩为石炭系浅变质岩,中西段为花岗岩,钻探证实石炭系浅变质岩风化壳发育,花岗岩比较破碎或裂缝发育,均可作为良好储层。该带有一定规模资源量,勘探潜力较大。
The bedrock buried hill reservoirs are stratigraphic reservoirs that are developed under the unconformity and are often distributed in the basement uplift belt of the petroliferous basins. Weathering crusts and fractures occurred before the deposition of the caprock in the basin because of long-term exposure to the earth’s surface, which provided a favorable site for the later accumulation of oil and gas. After the multi-stage tectonic evolution of the northern fault belt in the Yanmai area, a bedrock shoal (ancient burial hill) thrusting toward the hydrocarbon generating center in the northern depression has been formed. The source rocks of the Badaowan Formation in Jurassic have been directly covered by The frontal and oil source are abundant and the preservation conditions are good. The bedrock of the eastern part of the tectonic belt is Carboniferous shallow metamorphic rock, while the middle and western parts are granite. It is confirmed by drilling that the metamorphic crust of the Carboniferous metamorphic rocks develop and the granite is crushed or fractured, As a good reservoir. With a certain amount of resources, the exploration potential is large.