鄂尔多斯盆地水平井开发注采参数优化研究

Optimization of injection production parameters for horizontal well development in Ordos basin

目前鄂尔多斯水平井开发已经达到一定规模,但是相应的注采井网及配套设施有待进一步提高,文章分别从延安组及延长组油藏,现有的各类井网与其对应的投产方式进行论述,认为采用分段压开,分段注水的投产方式比较合理。其次,从注水时机、生产压差、注采比等方面对水平井开发模式进行了论述,认为超前6个月温和注水开发效果最好,延安组合理生产压差为3 MPa,注采比1.12,延长组合理生产压差4.5 MPa,注采比1.14。并最终汇总给出了鄂尔多斯盆地水平井开发注采参数优化总结。

At present,the development of Ordos wells has reached a certain scale,but the cor-responding well network and facilities need to be further improved.This article from the Yan＇an formation and Yanchang formation,the existing types of wells and the corresponding operation mode are discussed.The authors believe that the segmented sub injection pressure to open the production mode is rational.Secondly,from the time of water injection,production pressure,injection production ratio and other aspects of the development mode of horizontal wells is discussed that is 6 months ahead of moderate waterflood development effect is the best combination of Yan＇an production pressure difference is 3 MPa,the injection production ratio of 1.12,and extend the combination of differential pressure 4.5 MPa,injection production ratio of 1.14.Finally,the optimization of injection production parameters of horizontal well in Ordos basin is summarized.