昌德气田深层构造与成藏控制因素研究

发布时间：2018-02-28 15:44

本文关键词： 昌德气田深层构造断裂系统天然气成因成藏模式　出处：《浙江大学》2015年硕士论文　论文类型：学位论文

【摘要】：大庆深层气藏有徐深、昌德、升平等3个,目前已建成了14×108m3的产能,“十二五”期间,大庆天然气产量要达到50×108m3,昌德气田为重要开发区块之一。为了进一步合理开发昌德气田储量,有必要针对昌德气田深部构造及油气成藏的控制因素进行研究,为后续勘探开发提供技术支持。本文在对昌德气田三维地震资料进行构造精细解释和系统分析的基础上,开展了深部构造的研究,认为昌德气田发育三套断裂体系,即早白垩世断陷发育时期的东西向正断裂体系、青山口组沉积时发育的南北向正断裂体系和新生代晚期的正断裂体系。早白垩世发育的东西向正断裂对早白垩世的沉积具有控制作用,控制了早白垩世断陷的发育；而青山口组沉积时发育的南北向正断层体系属于弱生长断层体系,青山口早期的沉积在正断层附近沉积厚度有所加大,正断层对早期的沉积具有重要的控制作用。构成昌德气田深层气藏的昌德气藏和昌德东气藏组,无论从天然气组分组成、分布特征、碳同位素特征还是气藏类型等都存在明显的差异。对于两者的天然气成因、昌德气藏中的天然气有相当部分是来源于深层的无机成因气,而昌德东气藏天然气主要为有机成因的煤成气,来源于徐家围子断陷烃源岩源区。在前人研究的基础之上,利用昌德气田13口深层钻井的各种测试、分析资料进行综合整理和分析,开展了昌德气田的综合研究,建立了昌德气田的天然气成藏模式,包括：不整合面+基岩风化壳成藏模式,不整合面或砂体+断裂+古隆起的成藏模式,裂缝+火山岩成藏模式,砂体+地层超覆圈闭成藏模式。
[Abstract]:There are three deep gas reservoirs in Daqing, including Xu Shen, Changde and Shengping. At present, 14 脳 108 m3 production capacity has been built, and during the 12th Five-Year Plan period, The natural gas production of Daqing should reach 50 脳 108m3, and Changde gas field is one of the important development blocks. In order to develop the reserves of Changde gas field rationally, it is necessary to study the controlling factors of deep structure and oil and gas accumulation in Changde gas field. Based on the detailed structural interpretation and systematic analysis of 3D seismic data in Changde gas field, the deep structure is studied, and it is considered that three sets of fault systems are developed in Changde gas field. The east-west normal fault system during the development of early Cretaceous fault depression, The north-south normal fault system and the late Cenozoic normal fault system developed in Qingshankou formation. The east-west normal fault developed in the early Cretaceous controlled the deposition of the early Cretaceous and controlled the development of the early Cretaceous fault depression. However, the north-south normal fault system developed in Qingshankou formation is a weakly growing fault system, and the deposition thickness near the normal fault in the early Qingshankou formation has increased. The normal fault plays an important role in controlling the early deposition. The Changde gas reservoir and the Changdedong gas reservoir group, which constitute the deep gas reservoir in Changde gas field, regardless of the composition and distribution characteristics of natural gas, There are obvious differences between carbon isotope characteristics and gas reservoir types. For the origin of natural gas in Changde gas reservoir, a considerable part of the natural gas in Changde gas reservoir is derived from deep inorganic gas. The natural gas in Changdedong gas reservoir is mainly organic coal-formed gas, which comes from the source rock of Xujiaweizi fault depression. On the basis of previous studies, the various tests of 13 deep drilling wells in Changde gas field are used. The comprehensive research of Changde gas field is carried out, and the gas accumulation model of Changde gas field is established, including the weathering crust model of unconformity surface bedrock. The reservoir forming model of unconformity surface or sandbody fault paleouplift, the reservoir forming model of fractured volcanic rock, and the overlying trap model of sand formation.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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