曲流河片状沉积砂体精细刻画方法  

Fine characterization method of meandering river flake sedimentary sand body

作　　者：马佳国 王建立 周卿 王腾 MA Jiaguo;WANG Jianli;ZHOU Qing;WANG Teng(CNO0C China Limited Tianjin Branch,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《中国海上油气》2022年第6期101-109,共9页China Offshore Oil and Gas

摘　　要：油田开发中后期,砂体研究的精细程度直接影响剩余油分布的认识。曲流河片状沉积砂体经过多次河道改道沉积,砂体内部结构复杂。采用地震、地质、油藏多专业信息综合研究,对片状砂体沉积过程进行精细刻画。首先利用高精度边缘检测属性切片的动态研究,对砂体各期河道发育演化过程,及砂体沉积过程有了宏观的认识。然后根据实钻井数据,统计出点坝、河道滞留、溢岸砂等沉积单元测井曲线特征,地震剖面响应特征及属性切片上响应特征,统计结果表明各沉积单元在地震剖面上有明显的响应特征,在属性切片上能明显区分。最后结合地震剖面相、连井剖面及属性切片刻画出单点坝发育区、点坝叠置发育区,及废弃河道位置和侧积夹层发育位置。本文井震结合、平剖结合的研究方法在复杂砂体精细解剖中取得了较好应用效果,为后期砂体精细建模和剩余油分布研究奠定了基础。In the middle and later stage of oilfield development, the fine degree of sand body research directly affects the understanding of remaining oil distribution. The meandering river flake sedimentary sand body has been deposited after many channel changes and the internal structure of the sand body is complex. Based on the comprehensive study of seismic, geological and reservoir information, the sedimentary process of flake sand body is accurately described. Firstly, the dynamic study of high-precision edge detection attribute slices is used to obtain a macro understanding of the development and evolution process of the channel and the sedimentation process of the sand body in each stage. Then, the logging curve characteristics, seismic profile response characteristics and attribute slice response characteristics of sedimentary units such as point dam, channel retention and overflowing bank sand are calculated according to the actual drilling data. The statistical results show that each sedimentary unit has obvious response characteristics in seismic profiles and can be distinguished in attribute slices. Finally, the single point dam development area, point dam overlay development area, abandoned channel and lateral interlayer are described by combining with seismic profile facies, connected well profile and attribute slices. In this paper, the combined well-seismic and plane-profile study method has achieved good application effect in the fine anatomy of complex sand body, which lays a foundation for the fine modeling of sand body and the study of remaining oil distribution in the later stage.

关 键 词：曲流河 片状砂体 砂体精细研究 地震切片 井震联合研究 

分 类 号：TE321[石油与天然气工程—油气田开发工程]