提高薄差油层动用厚度的实践与认识

Practice and Cognition of Improving the Employ Thickness of the Thin and Poor Reservoir

影响以薄差油层为主要开发对象油田开发效果的主要原因是薄差油层动用厚度低。为了改善薄差油层开发效果,在对薄差油层动用厚度低的原因进行分析的基础上,针对薄差油层由于岩性、物性差,启动压力梯度大,钻井和完井过程油层受到污染以及受层间干扰影响导致动用厚度低的实际,在薄差油层开发过程中,有针对性的采取钻井、完井过程中实施油层保护措施。提高注入水质、合理组合注水层段、优选增产、增注工艺措施等手段,有效提高了薄差油层的动用厚度,改善了以薄差油层为主要开采对象井的开发效果。

The effect of oilfield development which thin and the poor reservoir development is served as the main development target is mainly influenced by the low employ thickness of thin and poor reservoir.To improve the effect of thin and poor reservoir development,the cause of the low employ thickness is analyzed.The lithological characters and physical property of thin and poor reservoir are poor;actuating pressure is large;the process of drilling and completion is polluted;and the interference between layers leads to the low employ thickness.In the process of the development,reservoir protection is used during the process of drilling and completion;quality of injection water is improved;injection water layers is reasonably combined;optimization of yield and injection measurements enhance the employ thickness of poor reservoir development,and improve the effect of development which thin and poor reservoir is the production target.