【作者】 李君文；

【导师】 陈洪德； 许卫平； 牟传龙；

【作者基本信息】 成都理工大学 ， 古生物学与地层学， 2004， 硕士

【摘要】 对于以岩性圈闭、岩性—构造复合圈闭为主的气藏，开展沉积体系的研究是进行储层评价和预测的基础，和鄂尔多斯岔地其它地区一样，塔巴庙区块二叠系山西组和下石盒子组气层的富集主要受沉积相带的控制，因此，区内目的层段的沉积体系特征、亚微相组合特征、垂向演化规律和有利储集砂体分布规律的研究就成为该区地质研究的一项重要内容。 本文根据沉积学、石油地质学和层序地层学理论，综合利用地表露头、钻井岩芯、测井曲线资料和试气成果资料，对鄂尔多斯盆地塔巴庙区块晚古生代沉积体系及含气层特征进行了研究。结果表明，研究区内目的层段可以划分为2个沉积体系：(1)上石炭统太原期为有障壁海岸沉积体系，发育潮坪—泻湖—障壁砂坝沉积。(2)下二叠统山西组～中二叠统下石盒子组为湖泊三角洲沉积体系，其中山西期为网(braided)状河湖泊三角洲，以三角洲平原亚相沉积为主，下石盒子组早期也为网状河三角洲、晚期为曲流河三角洲平原沉积。详细分析了这些沉积体系的岩性岩相组合、沉积层序、剖面结构、沉积构造及粒度分布等特征。 在沉积体系研究基础上，以长期旋回为编图单元，编制了8张层序岩相古地理图，讨论不同时期沉积体系的配置关系，揭示了不同时期岩相古地理展布特征和演化规律。在此研究基础上，充分利用有关的试气成果资料，详细分析了含气层的岩性、层序地层特点、砂体的形态产状特征、不同时期主河道分布与迁移的规律及含气层的剖面结构特点等。为进一步生、储、盖组合分析和油气勘探提供了依据。更多还原

【Abstract】 According to the deposit mained lithologic trap, lithologic-structure complex trap, the sedimentary system research is the base of reservoir assessment and prognosis. The gas concentration of shanxi group and xiashihezi group of Permain system in Tabamiao area was mainly constrolled by sedimentary facies belt. Therefore, it is an important content in this geological research area that study sedimentary systems character of object layers, research combined character of subfacies and microfacies ,and its regular between vertical evolution and reservoir sand bodies.Under the guidance of theories of sedimentology, petroleum geology and sequence stratigraphy , and through the comprehensive analysis of outcropsrock , cores, well logs and testing outcomes of rock gas, this paper studies the depositional systems of Neopaleozoic and the character of aeration zone in Tabamiao area of Ordos basin .The result indicates that the object layers are divided into two depositional systems, the barrier seacoast depositional systems are recognized on upper Carboniferous taiyuan phase with tidal flat, lagoon and barrier bar sedimentary deposit . Lake delta depositional systems appear from lower Permian shanxi to middle Permian xiashihezi phase, braided river delta in shanxi phase with delta plain subfacies sedimentary deposit, and so early xiashihezi , meandered river delta plain subfacies in later xiashihezi group. Facies association, lithologic composition, deposition sequence, sectional structure, sedimentary structure and grain size probability are analysed in detail.Being or the base of depositional systems, eight pieces of sequence paleogeographic map have been drawned up on condition of long-term cycle sequence as drawing unit, then discussing the distribution of depositional systems on different phases, paleogeographic spread and evolution have been disclosed. On studying of them .using the testing outcomes of gas fully, lithologic characters .strata sequence, sand body shape, sequence sectional structure in aeration zone and main channels migrating pattern on different phases have been analysed . For futher reservoir, cap, source rock and oil gas expiortion更多还原