马厂北部复杂带地震资料处理解释

发布时间：2018-05-08 19:08

本文选题：小波变换 + 多尺度分析　；参考：《长江大学》2015年硕士论文

【摘要】：马厂北部复杂带油气储量丰富,但由于构造极复杂,认识难度大,地层对比相当困难,导致开发效果很差。要达到提高动用地质储量,增加产能,提高采收率的目的,就必须重新进行落实构造等基础研究。由于该区断层控制程度低,构造不清,一直未进行系统的地质研究。构造体系及储集层分布规律研究不够,特别是油藏描述精度不够制约了该地区的油藏评价及新区产能建设。本次处理解释就是通过开发出的多尺度分析地震资料处理软件处理其地震资料并对马厂北部复杂带地震资料进行精细构造解释,加强该区油藏的整体解剖与评价,为该油藏的滚动开发提供科学的依据,并在此基础上结合该区下一步滚动关键井的钻探与评价,形成新区产能建设阵地,提高该区的整体开发水平。在多尺度分析地震资料处理软件开发方面,通过对小波变换及多尺度分析方法原理的研究,经过试验研究选取合适的基小波和分解层数,基于matlab平台并利用小波变换工具箱开发出多尺度分析地震资料处理软件。在此基础上,小尺度下的分解结果用于分析地质体的细小结构,大尺度下的分解结果用于分析地质体的整体结构。在三维地震资料精细解释方面,三维地震资料包含了地层、构造和断裂等诸多信息,是油气勘探和开发中的一种重要基础数据。三维地震解释是一项非常复杂、工作量巨大且具有不确定性的任务。在这次研究中,我们建立地震解释数据库,通过VSP速度资料、时深数据或合成记录建立地震反射同相轴与地质层位之间的对应关系进行层位精细标定。利用三维可视化技术、选取地震解释标志反射层、多种子点层面立体追踪技术、蚂蚁追踪断层技术、相干体检测技术、井震结合评价技术等手段,遵循一定的解释思路,对层面和断层进行解释。在完成层位解释和断层解释工作后,再进行构造成图,获得需要的各种图件。根据本项目的研究目标,进行综合地质分析。从地震地质层位的精细标定、精细构造解释等几个方面进行大量研究工作,利用多源信息优选出有利目标,从而为油田的扩边挖潜提供地震地质依据。本论文通过以上对马厂北部复杂带地震资料的处理解释,得到了大量准确可靠的成果图件,并开发出了新的地震资料处理软件以提高该区地震资料品质,加强了复杂断块群地震资料处理技术实力,为进一步挖掘复杂断块区含油断块的潜力,实现油田的增储稳产,促进油田发展都具有重大意义。
[Abstract]:The complex zone in northern Machang is rich in oil and gas reserves, but the development effect is very poor due to the complexity of structure, the difficulty of understanding and the difficulty of stratigraphic correlation. In order to increase the production reserves, productivity and oil recovery, it is necessary to carry out structural research again. Because of the low degree of fault control and unclear structure, no systematic geological research has been carried out in this area. The study of structural system and reservoir distribution law is not enough, especially the insufficient precision of reservoir description restricts the reservoir evaluation and productivity construction in the new area. This processing interpretation is to strengthen the overall anatomy and evaluation of the reservoir in this area by processing the seismic data and fine structural interpretation of the seismic data of the complex zone in the northern part of Machang through the development of a multi-scale seismic data processing software. It provides a scientific basis for the rolling development of the reservoir, and on the basis of this basis, combining with the drilling and evaluation of the next key rolling wells in this area, the production capacity construction position of the new area is formed, and the overall development level of the area is improved. In the development of multi-scale analysis seismic data processing software, through the research of wavelet transform and the principle of multi-scale analysis method, the appropriate basic wavelet and decomposition layer number are selected through experimental research. Based on matlab platform and wavelet transform toolbox, a multi-scale seismic data processing software is developed. On this basis, the results of decomposition at small scale are used to analyze the fine structure of geological bodies, and the results of decomposition on large scales are used to analyze the whole structure of geological bodies. In the fine interpretation of 3D seismic data, 3D seismic data contain a lot of information, such as strata, structures and faults, which is an important basic data in oil and gas exploration and development. 3D seismic interpretation is a very complex, heavy and uncertain task. In this study, we set up the seismic interpretation database, establish the correspondence relationship between seismic reflection phase axis and geological horizon by VSP velocity data, time-depth data or synthetic record to calibrate the horizon fine. By using 3D visualization technology, we select seismic interpretation mark reflection layer, multi-seed point level stereoscopic tracing technology, ant tracing fault technology, coherent volume detection technology, well shock combined evaluation technology and so on, and follow certain interpretation ideas. Explain the layers and faults. After the layer interpretation and fault interpretation are completed, the necessary maps are obtained. According to the research goal of this project, comprehensive geological analysis is carried out. A great deal of research work has been done from several aspects such as fine calibration of seismic geological horizon fine structural interpretation and so on. The favorable targets are selected by using multi-source information so as to provide the seismic geological basis for exploiting the expanding edge of oil fields. Through the above interpretation of the seismic data of the complex belt in the northern part of Machang, a large number of accurate and reliable maps have been obtained, and a new software for seismic data processing has been developed to improve the quality of seismic data in this area. The technical strength of seismic data processing in complex fault block group is strengthened. It is of great significance to further excavate the potential of oil-bearing fault block in complex fault block area, to realize the increase of reservoir and stable production of oil field and to promote the development of oil field.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.44

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