高分辨率层序地层学在薄层低渗透油田开发中的应用

The application of High-resolution sequence stratigraphy in the thin-zone and low permeability oilfield development

在油田开发过程中,特别是在砂泥岩薄互层低渗透油田注水开发过程中,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。本文以吐哈盆地鄯勒油田勒3区块七克台组为例,探讨在薄层低渗透油田开发阶段中进行油藏范围内高分辨率层序地层学研究的方法,展示了利用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的方法及应用。

In the exploring process of oilfield,particulaly in the water injection of the thin--zone and low permeability oil- field ,in order to enhance the efficiency of oil field water injection and study the distribution of remaining oil, requiring mastering single accumulation of sandstone , the vertical and horizontal distributions of seepage barrier. However,due to the continental stratigraphy phases change quickly, the conventional methods of comparison are often unable to objectively reflect the time--stratigraphic relationships,thus the accurate comparison of sand between wells ,the temporal and spatial distribution of sand have been continental major problem. Taking the oil bearing series of Shanle Oilfield in Turpan Hami Basin as an example, exploring high- resolution sequence stratigraphy research methods and techniques, and setting out new methods of demonstratting Lake pan--face recognition and comparing,summing up the method of high--resolutlon sequence stratigraphic framework established.