下寺湾油田道镇地区长6储层研究

发布时间：2019-03-11 12:05

【摘要】：在下寺湾油田标志层及相应的测井曲线特征研究基础上,对研究区地层进行精细划分与对比。通过地质和钻井取芯资料,分析总结储层的沉积特征、岩石学和电性特征、孔隙组合特征及结构。通过观察取心资料,描述储集层的主要岩性、矿物成分、胶结类、粒度、分选情况、充填物等,充分了解控制油层储集能力的定性因素。对研究区油层组地层特征进行总结研究。借助该油田域有关的地质及测井资料,对各地层地质情况、厚度及相应的曲线、岩电关系作进一步研究,在测井曲线解释中正确划分地层。认为本区长6储层为三角洲前缘沉积,水下分流河道为主要砂体,主要为细粒长石砂岩,其中砂岩以浅灰色、灰色和浅灰绿色中细粒砂岩为主,分选较好,次棱角状,成分成熟度与结构成熟度都较高,本区长6储层的孔隙组合类型为溶蚀孔-剩余孔-微裂缝配套型,储层物性以低孔、低渗、小喉道为主要特点,属低孔特低渗储层,其中碎屑岩的成岩变化,对碎屑岩储层的孔隙形成、保存以及破坏起着至关重要的作用。碎屑岩储层及其储集性能既受沉积相的控制,又受到成岩作用的强烈影响。为下寺湾油田道镇区块制定合理的油田开发方案提供依据。
[Abstract]:Based on the study of the characteristics of the sign beds and the corresponding logging curves in Xiasiwan Oilfield, the strata in the study area are classified and correlated in detail. By means of geological and drilling coring data, the sedimentary characteristics, petrological and electrical characteristics, pore assemblages and structures of the reservoirs are analyzed and summarized. By observing coring data, the main lithology, mineral composition, cementitious type, particle size, sorting condition and filling material of reservoir are described, and the qualitative factors controlling reservoir capacity are fully understood. The stratigraphic characteristics of oil formation in the study area are summarized and studied. Based on the relevant geological and logging data of the oilfield domain, the geological conditions, thickness, corresponding curves and rock-electricity relations of each formation are further studied, and the strata are correctly divided in the interpretation of logging curves. It is considered that Chang 6 reservoir in this area is delta front sedimentary, underwater distributary channel is the main sand body, mainly fine feldspathic sandstone, in which the sandstone is mainly light gray, gray and light gray green medium fine grain sandstone, the classification is good, and the subprism is angular. The pore assemblage type of Chang-6 reservoir in this area is solution pore-residual pore-micro-fracture matching type. The physical properties of reservoir are low porosity, low permeability and small throat, and belong to low porosity and ultra-low permeability reservoir, and the reservoir is characterized by low porosity, low permeability and small throat, and the pore assemblage of Chang-6 reservoir is low porosity, residual pore and micro-fracture. The diagenetic change of clastic rock plays an important role in pore formation, preservation and destruction of clastic reservoir. Clastic reservoir and its reservoir performance are controlled by sedimentary facies and strongly influenced by diagenesis. It provides the basis for formulating reasonable oilfield development plan in Daozhen block of Xiasiwan oilfield.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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