青海油田英东油田漏失井固井工艺研究

Cementing technology of lost circulation well in Yingdong oilfield,Qinghai Oilfield

青海英东油田所处地理区域的地层压力不断减小,含水量不断增加,地层的渗透率不断升高,在进行开采工作时易发生漏失现象,现今可采用低密高强水泥浆体系进行固井工作,对于漏失严重的井可采取正注反挤的方式保证环空中水泥封固段的长度以满足下部开采要求。

The formation pressure and water content of Yingdong oilfield in Qinghai Province are decreasing,The permeability of the formation is increasing,and leakage is easy to occur during mining,At present,low density and high strength cement slurry system can be used for cementing work.For wells with serious leakage,the way of forward injection and backward extrusion can be adopted to ensure the length of the cement sealing section in the annulus to meet the requirements of lower mining.