渤海海域河流相储层地震响应特征分析研究

发布时间：2018-03-11 19:04

本文选题：渤海海域　切入点：河流相储层　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：河流相储层是我国渤海湾地区广泛发育的储集类型,主要表现为岩性纵向和横向变化大、连续性差等特征。由于受到沉积环境及水动力条件的制约,在渤海海域河流相地层中发育着大量的砂泥混杂相和砂泥交互相,储层不仅薄而且往往叠合或交叉,给河道砂体的准确解释带来很多困难。目前关于渤海海域河流相储层河道砂体的预测和综合解释,不仅是海上油气田勘探开发中至关重要的问题,也是中国东部各油田“增储上产”有力手段之一,它直接关系到井位的部署以及滚动勘探开发工作的成败。在渤海海域实际工区的砂体开发过程中,由于单砂体岩层厚度低于地震分辨率,或者分隔单砂体的泥质夹层达不到地震可分辨的厚度,都导致河流相砂岩储层描述结果的不确定性。而且目前对于河流相储层岩性变化大,空间结构复杂,波形与岩性并非一对应,尤其是在对岩性组合与地震响应特征的定量研究方面尚显不足,选择地震属性参数时存在较强的主观性。所以,本文针对渤海海域河流相储层砂体的分布特征,建立不同厚度变化模型、河道砂体空间分布模型、河道边界识别模型、下切河道砂体模型,进行模型正演及属性分析,对渤海海域河流相储层砂体模型的地震响应特征及其在地震属性方面的变化规律进行深入的研究,最后结合理论模型,总结渤海Q油田河流相储层的厚度变化特征、河道砂体的空间分布特征,河道的边界分布特征,下切河道的分布特征,为指导以后在河流相地质条件下的勘探工作提供依据。
[Abstract]:Fluvial reservoir is a widely developed reservoir type in Bohai Bay area of China, which is characterized by large longitudinal and lateral variation of lithology and poor continuity. The reservoir is restricted by sedimentary environment and hydrodynamic conditions. In the fluvial strata of Bohai Sea area, a large number of mixed sand and mud facies intersect each other, and the reservoir is not only thin, but also often superimposed or crossed. At present, the prediction and comprehensive interpretation of channel sand bodies in fluvial reservoirs in Bohai Sea area is not only a crucial issue in the exploration and development of offshore oil and gas fields, but also an important problem in the exploration and development of offshore oil and gas fields. It is also one of the powerful means of increasing reservoir and production in the oil fields in eastern China, which is directly related to the deployment of wells and the success or failure of rolling exploration and development. In the process of sand body development in the actual working area of Bohai Sea area, because the thickness of single sand body is lower than the seismic resolution, or the muddy intercalation separating single sand body can not reach the thickness of seismic discernibility. For fluvial sandstone reservoir, the lithology of fluvial facies reservoir is changed greatly, the spatial structure is complicated, and the waveform is not corresponding to lithology. Especially in the quantitative study of lithologic assemblage and seismic response characteristics, there is a strong subjectivity in selecting seismic attribute parameters. Therefore, this paper aims at the distribution characteristics of fluvial reservoir sand bodies in Bohai Sea area. The model of different thickness variation, the spatial distribution model of channel sand body, the identification model of river channel boundary, the model of cutting channel sand body, the forward modeling and attribute analysis of the model are established. The seismic response characteristics of fluvial reservoir sand body model in Bohai Sea area and its variation law in seismic attributes are studied in depth. Finally, the thickness variation characteristics of fluvial facies reservoir in Q oilfield in Bohai Sea are summarized with the theoretical model. The spatial distribution characteristics of channel sand bodies, the boundary distribution characteristics of river channels and the distribution characteristics of undercut river channels provide basis for future exploration work under fluvial geological conditions.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.4

【参考文献】