不同地层产状下页岩气水平井地质导向策略研究

Research on Geological Guidance Strategy of Shale Gas Horizontal Well under Different Stratum Occurrences

国内外页岩气资源的开发普遍需要通过水平井钻探来实现经济效益。为了更准确地确定水平井穿行层位,确保穿行优质页岩层段,有效指导钻井轨迹,以重庆涪陵页岩气田焦石坝区块上奥陶统五峰组-下志留统龙马溪组为例,开展不同地层产状下水平井地质导向方法研究。实时指导钻井井眼轨迹,使水平轨迹穿行在优质页岩气气层段,增加单井产能,并通过评价地质导向技术应用效果,提出水平井最优穿行模式,评价地质导向技术应用效果对单井产能的影响,并指出水平井最优穿行模式。

The development of shale gas resources at home and abroad generally needs to achieve economic benefits through horizontal well drilling.In order to more accurately determine the horizontal well crossing layer,ensure the crossing of high-quality shale interval and effectively guide the drilling trajectory,this paper takes the section from upper Ordovician Wufeng Formation to lower Silurian Longmaxi formation in jiaoshiba block of Fuling shale gas field in Chongqing as an example to carry out the research on the geological guidance method of horizontal wells under different attitudes of stratum,guide the drilling borehole trajectory in real time,make the horizontal trajectory pass through the high-quality shale gas reservoir and increase the productivity of single well.By evaluating the application effect of geological guidance technology,the paper also puts forward the optimal traversing mode of horizontal well,evaluates the impact of the application effect of geological guidance technology on the productivity of single well,and points out the optimal traversing mode of horizontal well.