【作者】 朱俊；

【导师】 张金功；

【作者基本信息】 西北大学 ， 固体地球物理， 2010， 硕士

【摘要】 本论文以鄂尔多斯盆地上、下古生界的不整合为重点研究对象,对与不整合有关的烃源岩最大驱动力源区、不整合面的输导性及封堵性进行研究。依据钻井、录井及测井资料分析了天然气藏在不整合面中的分布；在以上研究基础上对与鄂尔多斯盆地上、下古生界的不整合有关的天然气藏成藏特点进行了初步分析。论文取得的主要认识有：1圈定了不同地质时期鄂尔多斯盆地与上、下古生界不整合有关的天然气藏主力气源岩天然气运移的最大驱动力源区位置。在气源岩埋深最大的早白垩世末,天然气运移的最大驱动力源区位于盆地西部马儿庄—大巴嘴—堵后滩—姬塬—马家山地区；盆地抬升剥蚀期天然气运移的最大驱动力源区位于盆地西缘南部的甜水堡—环县之间和北部的铁克苏庙附近地区；盆地现今天然气运移的最大驱动力源区位于盆地西北缘铁克苏庙以南附近区域。2鄂尔多斯盆地上、下古生界不整合面之下的岩层在盆地东部米脂附近地区发育膏岩,在不整合中对天然气有较好的封堵作用；其他地区为裂缝、溶孔发育的灰岩,对于天然气的运移具良好的输导性。3鄂尔多斯盆地与上、下古生界不整合有关的天然气藏主要分布于膏岩发育区以西。在不整合面中,天然气的供给受最大驱动力源区的控制,而天然气的聚集受封堵性的控制。更多还原

【Abstract】 This thesis is about the unconformity between upper and lower Paleozoic in the Ordos Basin. Researches focus on the location of the largest driving force area of the hydrocarbon source rock related the unconformity between upper and lower Paleozoic, the condition of transport and block of gas in the unconformity.Analysis of the distribution of natural gas reservoirs in unconformity based on drilling and logging date.Preliminary analysis the feature of the accumulation process of natural gas reservoirs.The results of this research indicates the following:1. The location of the largest driving force area of the hydrocarbon source rock of upper Paleozoic is defined in the different periods of Ordos Basin. The location of the largest driving force area of Lower Cretaceous is Maerzhuang-Dabazui-Duhoutan-Jiyuan-Majiashan in the period of settling of Ordos Basin. The location of the largest driving force area of Lower Cretaceous is Tiansh-uibao-Huanxian and Tekesumiao in the period of elevation of Ordos Basin. The location of the largest driving force area of nowadays is the south of Tieke-sumiao in Ordos Basin.2. The rocks below the unconformity between upper and lower Paleozoic, which plays the part of sealing better for gas when migrating in the unconformity, develops plaster rock surround Mizhi area in the eastern of Ordos Basin. In the other areas of the basin, cracks and the limestone developed in the dissolution porosity are good passages for the transport of gas.3. In the reservoirs related the unconformity between upper and lower Paleozoic in the Ordos Basin, these reservoirs are mainly distributed in the west of the area where plaster rock developed.and the supply of gas was controlled by the location of the largest driving force area, the accumulating of gas was controlled by rocks block condition.更多还原