Abstract: The features of low pressure,low permeability and fracture-porosity of carbonate gas reservoir in Jiannan gas field of Jianghan Oilfield were introduced,and the schemes of gas-bearing formation protection in a long extension horizontal well were selected.The indoor systematic researches on the fractured reservoir taking the fractures as the main flow channels were carried out.In comprehensive consideration of both the temporary blocking and removing blockage,a new pattern complex temporary blocking-removing blockage technique was proposed.This technique has been applied in Well Jianping-1 and acquired remarkable benefits.It is a breakthrough in gas formation protection and can provide a valuable reference for the similar gas and oil-bearing formation protection.

Key words: Jiannan gas field, horizontal well, fractured gas reservoir, temporary blocking-removing blocking technique, application result

摘要： 介绍了江汉油田建南气田碳酸盐岩气藏具有的低压、低渗、裂缝—孔隙型特征,对其后期裸眼完成长水平段水平井气层保护方案进行了选择,对以裂缝为主要渗流通道的储层进行了室内研究。综合考虑暂堵和解堵两方面的要求,形成了一种新型的复合暂堵—解堵技术。在建平1井现场应用,获得了显著的经济和社会效益,在气层保护方面取得了突破,为类似油气藏的保护提供了参考资料.

关键词: 建南气田, 水平井, 裂缝型气藏, 暂堵及解堵技术, 应用效果