苏里格致密气水平井完井压裂技术对比研究

Comparative study on the completion and fracturing technologies used for tight-gas horizontal wells in Sulige Gas Field

长庆苏里格气田是典型的致密砂岩气田,水平井开发技术从2008年以来通过技术攻关得到了一定规模的应用。早期受工艺技术限制的影响,现场主要应用的是裸眼完井不动管柱水力喷射分段压裂技术,后期为了提高致密气水平井单井产量,优化完井方式形成了固井完井桥射联作多簇射孔分段压裂技术,压裂增产效果提升显著。通过对2种完井方式的特点、应用情况进行对比分析,对近10年来的开发效果进行了定量评价,总结了苏里格致密气田水平井开发的经验,为气田后期开发及国内类似气藏开发提供依据。

Sulige Gas Field of Changqing Oilfield Company is a typical tight sandstone gas field,where horizontal well development technology has been applied to a certain scale by virtue of technological research since 2008.In the early stage,due to the technological restriction,the open hole completion and one-trip hydraulic jet staged fracturing technology is mainly adopted to meet the field demands.In the late stage,in order to improve the single-well production rate of tight-gas horizontal wells,the completion mode is optimized to form the cementing,completion and combined bridge plug and multi-cluster perforation fracturing technology,which improves the fracturing stimulation effect significantly.Two completion modes were comparatively analyzed from the aspects of characteristics and application situations,their development effects in the last ten years were quantitatively evaluated,and the experience of horizontal well development in Sulige tight gas field was summarized,so as to provide the basis for the development of Sulige Gas Field in the late stage and the development of similar gas reservoirs at home.