霸县凹陷长丰镇构造带沙二段沉积微相研究

发布时间：2018-11-13 13:20

【摘要】：长丰镇构造带位于文安斜坡的中南部,是文安斜坡四个鼻状构造带之一,为文安斜坡的产油区带和最有勘探潜力的区带之一。目前在东部的S88井区、W96井区已获得工业油流并建成油田,在西部的WG3井处也发现工业油流,展现了长丰镇构造带具有良好的油气勘探开发前景。但受研究精度的影响,对研究区砂体的展布规律,特别是含油气砂体的展布规律认识不清,未能准确的对沉积微相的展布特征进行分析研究,使长丰镇构造带成为文安斜坡四个鼻状构造带中开发程度最低的构造带,严重地制约着文安斜坡的评价建产工作。本文以经典层序地层学理论为指导,对长丰镇构造带沙二段地层进行了层序界面的识别与闭合,根据测井曲线和录井资料识别出初始湖泛面和最大湖泛面,并以此为依据将沙二段地层划分为两个层序,并细分为四个体系域。以研究区12口取心井的观察与描述为基础,结合研究区目的层段测井曲线的特征,分析总结出适合研究区目的层段的测井相模板,并以此为基础对单井沉积微相进行了分析研究,识别出三角洲平原环境下的分流河道、天然堤、分流河道间以及三角洲前缘环境下的水下分流河道、水下天然堤、水下分流河道间等沉积微相。结合以地震属性为代表的地球物理资料以及砂体平面展布特征,对长丰镇构造带沙二段地层的沉积相进行了研究,并结合现在已有生产情况对研究区内的油藏情况进行了分析,从而提出了长丰镇构造带的有利油气发育区域。
[Abstract]:The Changfengzhen structural belt is located in the central and southern part of the Wenan slope. It is one of the four nose-shaped structural belts on the Wenan slope and is one of the oil-producing zones and one of the most promising zones in the Wenan slope. At present, in S88 well area in the east, W96 well area has obtained industrial oil flow and built oil field, and industrial oil flow has also been found in WG3 well in the west, which shows that Changfeng structural belt has good prospects for oil and gas exploration and development. However, due to the influence of research precision, the distribution law of sand bodies, especially oil-bearing sand bodies, is not well understood, and the distribution characteristics of sedimentary microfacies are not accurately analyzed and studied. The Changfengzhen structural belt is the least developed of the four nasal structural belts of Wenan slope, which seriously restricts the evaluation and production of Wenan slope. Based on the classical sequence stratigraphy theory, the sequence interface of the second member of the Sha member of the Changfengzhen structural belt is recognized and closed. Based on the log curves and logging data, the initial lake flooding surface and the maximum lake flooding surface are identified. The formation of the second member of the Shahejie formation is divided into two sequences and subdivided into four system tracts. Based on the observation and description of 12 coring wells in the study area, combined with the characteristics of the logging curves of the target interval in the study area, the logging facies template suitable for the target interval in the study area is analyzed and summarized. Based on this, the sedimentary microfacies of single well are analyzed and studied, and the distributary channel, natural embankment, underwater distributary channel and underwater natural embankment in delta plain environment are identified. Isodepositional microfacies between subaqueous distributary channels. Based on the geophysical data represented by seismic attributes and the distribution characteristics of sand bodies, the sedimentary facies of the formation of the second member of the Sha member in the Changfengzhen structural belt are studied, and the reservoir conditions in the study area are analyzed in the light of the existing production conditions. Therefore, the favorable oil and gas development area of Changfengzhen structural belt is put forward.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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