桥式偏心精细分注工艺及测调技术研究与应用

长庆油田注水井具有＂定向井、小水量＂的特点和难点,对分注工艺的可靠性和实用性提出了更高的要求。随着油田开发时间的不断深入,常规分注工艺存在分注有效期短、测试投捞成功率低、测试误差大等问题。本文通过桥式偏心分注工艺的研究与应用,完善配套了测调技术,初步满足了定向井小水量注水的技术需要,为精细化注水提供了新的技术借鉴。

The Research and Application on the Bridge-Eccentric Separate Flooding Technology and Its Testing

In Changqing oil field,there are two typical characteristics in the water-injection well.First,the well is directional well;second,the injection rate is very low.Therefore,it is very difficult to inject water and it requires that the separate flooding technology should be highly reliable and practicable.Furthermore,as the oil field is been exploited more and more deeply,some defects has been found in the conventional technology,such as short effective term,low testing efficiency and high testing error.Based on the analysis of the conventional technology,combined with the actual and new situation in the field, the bridge-eccentric separate flooding technology has been developed and successfully applied in the Changqing oil field.Through the field test,it has been shown that the new technology is appropriate and effective in the field.In addition,it has improved and perfected the testing technology in the water-injection well.So this new technology has satisfied the needs of the Changqing oil field,and it is a promising technology which is a new means for the fine water injection.