蟠龙油田贯屯长2油藏精细描述研究

发布时间：2019-04-19 18:48

【摘要】：鄂尔多斯盆地蟠龙油田贯屯区块生产层位延长组长2储层属于低孔低渗致密砂岩储层。针对该油藏的地质特征,对贯屯长2油藏进行了储层地质精细描述。为了更为客观真实的认识储层地质特征,论文重点对研究区开展了储层特征研究和三维地质建模研究。论文以蟠龙油田贯屯区块生产层位延长组长2储层为研究对象,以岩心、测井资料为基础,综合应用石油地质学,构造地质学,沉积学,层序地层学,储层地质学、油藏工程等方法技术,对研究区内长2油藏进行精细描述,主要开展了以下几点工作。对油藏储层的沉积地层进行了精细对比划分,建立了等时的地层格架和真实的储层空间格架；结合沉积背景,结合分析岩心相和测井相研究,细分出水心滩、河道充填、河床滞留、天然堤、决口扇、泛滥平原等6种微相类型,在纵向上和平面上对小层的沉积微相分布规律进行了确定,发现长22砂体连片展布,河道相基本覆盖全区,纵向叠置加积,沉积砂体厚度大：在此基础上对储层特征及流动单元进行了精细研究：进行了测井二次解释,结合四性关系对储量进行了复算；遵循从点→面→体的步骤利用MS软件建立了研究区主力产层长22的井模型、层模型、三维沉积微相模型,并在沉积微相的控制下建立了三维属性模型。通过对该油藏的精细描述研究为后期制定合理开发方案,提高采收率,高效合理的开发油藏提供了理论依据与技术支持。
[Abstract]:The Yanchang-2 reservoir belongs to low porosity and low permeability tight sandstone reservoir in Guantun block, Panlong oilfield, Ordos basin. According to the geological characteristics of the reservoir, the reservoir geological fine description of Guantun Chang 2 reservoir is carried out. In order to understand the geological characteristics of reservoir more objectively and realistically, the study on reservoir characteristics and three-dimensional geological modeling is carried out in the study area. Based on the core and logging data, this paper takes the Chang 2 reservoir, the production horizon of Guantun Block, Panlong Oilfield as the research object, and comprehensively applies petroleum geology, structural geology, sedimentology, sequence stratigraphy, reservoir geology, and so on. The detailed description of Chang-2 reservoir in the study area has been carried out by reservoir engineering and other methods, and the following work has been carried out. The sedimentary strata of the reservoir are classified by fine correlation, and the isochronous stratigraphic framework and the real reservoir space frame are established. Combined with sedimentary background and analysis of core facies and logging facies, six microfacies types, such as water core beach, river channel filling, river bed retention, natural levee, crevasse fan and flood plain, are subdivided. The distribution law of sedimentary microfacies of the small layer is determined in longitudinal and plane. It is found that the long 22 sand body is distributed continuously, the river facies basically covers the whole area, and the longitudinal superimposition is carried out. The thickness of sedimentary sand body is large: on this basis, the reservoir characteristics and flow units are studied in detail: the second interpretation of the well logging is carried out, and the reserves are re-calculated in combination with the relationship of four properties; The well model, layer model and three-dimensional sedimentary microfacies model of the main production layer length 22 in the study area are established by using MS software, and the 3D attribute model is established under the control of the sedimentary microfacies. The detailed description of the reservoir provides the theoretical basis and technical support for the later development plan, the improvement of oil recovery and the efficient and reasonable development of the reservoir.
【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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