【作者】 黄薇；

【导师】 樊太亮；

【作者基本信息】 中国地质大学（北京） ， 能源地质工程， 2010， 博士

【摘要】 本文针对古龙凹陷中段葡萄花油层以岩性油气藏勘探为重点的现状,以层序地层学、沉积学和石油地质学等理论为指导,综合运用钻井、测井、地震和岩心及测试分析等资料,对研究区的层序地层、沉积体系、坡折带、油气藏分布等特征开展了深入的研究。建立了研究区精细层序地层格架,阐明了沉积体系类型和沉积相构成特征,揭示了不同时期沉积相的演化和分布规律,探讨了坡折带对沉积相带的控制作用,综合分析了油气成藏主控因素,并对有利区分布进行了综合预测,以期对实现本区的油气勘探突破提供参考。主要成果和认识有:研究区葡萄花油层相当于一个三级层序,可划分为3个准层序组,由下至上分别与P13、P12和P11油层组大致相当,可进一步细分为8个准层序。建立了葡萄花油层的精细层序地层格架,总结了不同准层序的地层发育特征和分布规律。在层序地层格架内,以准层序为成图单元,编制了葡萄花油层各个准层序的沉积相图,揭示了沉积相带的演化规律。指出本区主要受西部英台物源和北部克山-杏树岗物源影响,发育湖泊三角洲沉积体系和湖泊沉积体系。详细分析了不同时期坡折带平面分布特征,认为坡折带的形成受构造作用和沉积差异压实作用控制,并探讨了坡折带对不同准层序组所发育沉积相类型的控制作用。本区主要发育断层-岩性油藏、构造-岩性油藏、砂岩透镜体岩性油藏和砂岩上倾尖灭岩性油藏。成藏主控因素表现为:一方面生油强度控制油气分布范围,另一方面构造断裂控制着油气运移聚集,再就是沉积微相类型对产油层分布的控制作用。在沉积相、层序地层、成藏规律等研究基础上,对研究区葡萄花油层的有利区分布进行了预测。更多还原

【Abstract】 Serving the exploration of lithology reservoirs for Putaohua Formation of middle Gulong Depression in north Songliao Basin, based on the theories of sequence stratigraphy, sedimentology and petroleum geology, with integrated data from drilling, log, seism, core and testing, the author systematically researched the characteristics of sequence stratigraphy, sedimentary setting, slope belt and reservoir distributing for Putaohua Formation of middle Gulong Depression. A detailed stratigraphy framework was established, and so was a sequence-sedimentary model. The types of sedimentary setting and the composing features of sedimentary facies were clarified, and then the evolution and distributing rules of sedimentary facies were discovered. The control of slope belt to sedimentary facies was discussed, too. Lastly, the author synthetically analyzed the dominant factors of reservoir forming, and forecasted the distribution of probable stratigraphy-lithology traps. The accomplishment of the article was hoped to give guidance to the exploration breakthrough in work area.The following are main productions:The Putaohua Formation in work area, probably a third-order sequence, could be divided into three parasequence sets, and they are separately corresponding with P13, P12 and P11 member. They could be further divided into eight parasequences. Besides, the fine sequence stratigraphy framework was set up for Putaohua Formation in work area, and the stratum developing characteristics and distributing rules of parasequences from different evolution stages were summarized.In the detailed sequence stratigraphy framework, with every parasequence as mapping unit, the sedimentary facies maps of different members were authorized for Putaohua Formation in work area, and the evolution rules of sedimentary settings in different stage were discovered. Influenced by continental clastic sources from westward Yingtai and northward Keshan-Qingshugang, there were mainly developed lacustrine-delta sedimentary system and lacustrine sedimentary system in work area.Systematical studied plane-distributing characters of slope belts in different stage, and analyzed the control of slope belt to the developing sedimentary facies of different parasequence.There are several types of reservoir in work area, such as fault-lithology, anticline-lithology, sandstone lens lithology and up-incline cusp lithology reservoir, and so on. Dominant factors of reservoir forming include: oil-generating intensity which controls the distributing scope, structural fracture which controls the migration and collection, and micro-facies types which control the distribution of oil-bearing sand bodies. Based on the studies of sedimentary facies, sequence stratigraphy and reservoir forming, the prospect areas Putaohua Formation in work area were pointed out.更多还原