高分辨率层序地层学在油田开发中的应用

Application of High Resolution Sequence Stratigraphy to the Development of the Oilfield

在油田开发过程中 ,特别是注水开发过程中 ,为了提高油田注水效率及对剩余油分布规律进行研究 ,要求掌握油藏范围内单一储集砂体及渗流屏障的纵横向分布特征。然而 ,由于陆相地层纵横向相变快 ,常规的小层对比方法往往不能客观地反映出地层的等时关系 ,因而井间砂体的准确对比及砂体时空分布一直是陆相油田储层研究的一大难题。本文探讨了在陆相油田开发阶段进行油藏范围内高分辨率层序地层学研究的方法和技术 ,展示了湖泛面识别和对比的新方法 ,总结了储层的高分辨率层序格架建立。

During the development of the oilfield, especially during water flooding process, the lateral and vertical distribution of sand body and filtration barrier bed in the entire oil reservoir must be understood in order to improve the water flooding efficiency and study the distribution laws of residual oil. However, the conventional stratigraphy correlation methods are not enough to reflect objectively the isochronism of the formation because of the fast depositional faces change in lateral and vertical. Therefore, it is a very difficult task to predicate the spatial distribution of sand bodies and conduct interwell stratigraphic correlation in continental oilfields. This paper mainly deals with the application of new research methods and techniques of high-resolution sequence stratigraphy to development of continental oilfield. The new methods of identification and correlation of flooding surface, the methods of establishing the reservoir framework, the division of flowing unit and the predication of distribution laws of residual oil with high resolution sequence stratigraphy are also discussed in this paper.