中亚地区费尔干纳盆地油气地质特征

Petroleum geology of Fergana Basin in Central Asia

对中亚地区费尔干纳盆地的地层、沉积和石油地质特征等进行了综合研究.该盆地的烃源岩为下第三系、上白垩统和中下侏罗统的海相与湖相泥岩、页岩和泥灰岩,有四套含油气层系,主要油气储集层为下第三系的滨浅海相和三角洲相砂岩和碳酸盐岩,多套泥岩、膏岩和泥灰岩为区域性和局部盖层,油气主要运移期和聚集期发生在早上新世,油气圈闭和油气田(藏)主要有构造型、构造-地层复合型和地层型等3种,目前油气主要分布在南部边缘构造带的两个含油气区.全盆地最大的油气田--明布拉克油气田的发现,使盆地油气潜力评价价值更高,可为整个中亚地区的油气勘探开发提供借鉴和指导作用.

An integrated study on lithology, sedimentology, and petroleum geology in the Fergana Basin (Central Asia) is carried out in this paper. In this orographic basin, the source rocks are marine and lagoon mudstones, shale and marl of the Paleogene, the upper Cretaceous and the lower-middle Jurassic, the chief reservoir beds are the marine and dalta sandstones and carbonate rocks of the Paleocene, the regional cap rocks are shale and gypsolyte from the upper Jurassic to the Pliocene, and the traps and the oil-gas fields are classified into three types that are the tectonic, the tecto-lithostratigraphic and the stratal traps and oil-gas fields. Structurelly, the oil/gas-braring basin is divided into four oil-gas regions that are the north basin flank, the central basin graben, the northeast and the southwest of south basin flank. The northeast area and the southwest area of south basin flank have more resources of oil and gas. The main time of oil and gas migration and accumulation is the early Paleocene. The Mingbulak Field of the central basin graben is the largest field of the Fergana Basin, and the basin's oil and gas potential has significantly increased for the Mingbulak field discovered.