摘要： 在现有的碎屑沉积地质体构型分级方案基础上,充分考虑自然界中河流沉积演化规律以及海上油田的资料基础与经济开发尺度等因素,遵循地质体分级原则与依据,建立了海上油田河流相复合砂体构型分级方案。从地质成因、主控因素、时空规模等方面系统阐述了河流相复合砂体13级构型单元的基本特征,并解析其与相关沉积地质体级次的关联性。与现有的储层构型分级的差异主要在于新增了“复合点坝”级次,复合点坝是多期残存点坝以复合体形式叠置而成的沉积单元,该级次是储层构型理论、海上油田资料分辨能力与经济开发尺度三者的契合点,是海上油田“地震导向、井震联合”构型研究思路的良好实践。河流相复合砂体构型分级对于指导海上油气开发具有一定的优势。

关键词: 海上油田, 河流相, 复合砂体, 构型级次, 复合点坝

Abstract: Based on the existing hierarchical scheme of architectural units in clastic deposits,taking account of the evolution law of natural river sedimentation,the data base and economic development scale of offshore oil fields,and following the principle and basis of the geological bodies classification,an architecture hierarchy of fluvial compound sand-body in offshore oil field is established. In this paper,the basic characteristics of 13^g rade architecture units of fluvial compound sand-body are systematically described from the aspects of geological genesis,main control factors,space-time scale,etc.,and the correlation between them and related sedimentary geological body grades is analyzed. The difference between the fluvial compound sand-body architecture hierarchy and the existing classification of reservoir architecture mainly lies in the adding of “composite point bar”,which is a composite sedimentary unit composed of multi-stage residual point bar. Composite point bar is the connecting point of reservoir architecture theory,offshore oil field data resolution and offshore oil field economic development scale. It is a good practice of “seismic guidance,well-seismic combination” research ideas in offshore oil field. It has been proved that the architecture hierarchy of fluvial compound sand-body has certain advantages for guiding offshore oil and gas development.

Key words: offshore oil field, fluvial facies, compound sand-body, architecture hierarchy, compound point bar

中图分类号: 

• P512.31