鄂尔多斯盆地西北部灵盐定地区油藏类型及其控制因素

OIL RESERVOIR TYPES AND THEIR CONTROLLING FACTORS IN LINGYANDING REGION, THE NORTHWEST ORDOS BASIN

作者将鄂尔多斯盆地西北部灵盐定地区中、下侏罗统延安组和上三叠统延长组油藏归纳为构造 岩性复合油藏、顶变遮挡油藏和地层超覆油藏等 5种类型 ,阐述了各种不同类型油藏的特征 ,并指出本区以复合类型油藏为主。结合各种类型油藏所处的构造位置及古地貌形态和岩相特征 ,文中论述了不同沉积相和不同类型构造对油藏形成的影响和控制作用。

In this paper, the oil reservoirs in the Middle-Lower Jurassic Yan'an Formation and the Upper Triassic Yanchang Formation of Lingyanding region, the Northwest Ordos Basin are classified into five types, that is, the tectonic-lithologic composite oil reservoir, the top-changing screened oil reservoir, the strata overlapping oil reservoir, etc. The characters of various oil reservoirs of different types are expounded. It is pointed out that the oil resservoirs in the study area are dominated by the composite type. Combined with tectonic location where each type of oil reservoir situated as well as paleogeomorphic forms and lithofacies features, the influences and controlling action of different sedimentary facies and different types of tectonics on the formation of oil reservoirs are also discussed.