基于地震正演与井震结合的低序级断层描述技术及应用  

Technology of Fine Characterization of Lower-class Fault Based on Seismic Forward Modeling and Well-seismic Combination

作　　者：束宁凯[1] 宋力 汪新文[1] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中石化胜利油田分公司勘探开发研究院,山东东营257000

出　　处：《现代地质》2017年第2期338-347,366,共11页Geoscience

基　　金：国家科技重大专项"复杂断块油田提高采收率技术"(2016ZX05011-002);国家科技重大专项"全球剩余油气资源研究及油气资产快速评价技术"(2011ZX05028)

摘　　要：复杂断块油藏的开发实践表明,低序级断层控油作用明显,对低序级断层的精细刻画是研究不同类型断块油藏开发技术的基础和关键。随着开发程度的提高,断块油藏面临越来越复杂的地质条件,如断层、地层剥蚀、超覆等多种地质现象并存,地层接触关系及断裂系统复杂,给现有地震资料条件下低序级断层识别及组合带来极大的困难。针对这一难题,通过探索,形成了基于地震正演分析与井震结合的低序级断层识别与精细刻画技术:综合利用井震结合重建地层对比模式指导井上小断点的准确识别、井断点地震反射特征与地震正演结合建立断层地震识别标志、井引导地震属性分析断层平面组合规律、井震多层位精细解释刻画断棱断面及多层叠合验证空间组合关系。在"断层、剥蚀、超覆"共存的孤东二六区沙河街组,通过该方法的应用,重组了其复杂断裂系统,解决了长期以来的油水矛盾,取得了较好的应用效果。The development practice of complex fault block reservoir shows that, the lower-class fault controls the distribution of remaining oil obviously, therefore, the fine description of the low-class faults is a key to the research of different types of fault block reservoir development technology. Meanwhile, the development of fault block reservoir is facing more and more complicated geological conditions, that is, the faults, erosion, overlap and syndeposition and other geological phenomena often coexist, which have caused complex stratigraphic contact relationship and fracture system. Aiming at solving this problem, a technology of fine characterization of the lower-class fault and its combination has been formed based on seismic forward modeling and well-seismic combination, such as reconstruction of the stratum contrast pattern by well-seismic combination to guide the accurate fault ridge identification, establishment of lower-class fault seismic identification by the combination of multi- well integrated calibration and seismic forward modeling, well-seismic multi-attribute analysis, and well-control multi-horizon tracking for the fine description of fauk edge. Then, a new complex fracture system has been rebuilt in Shahejie Formation of region 2 ＆ 6, Gudong Oilfield, based on this method, which has screened out the confusing relationship between oil and water, and achieved high development performance.

关 键 词：低序级断层 地震正演 井震结合 复杂断块油藏 

分 类 号：TE122.1[石油与天然气工程—油气勘探]