摘要
介绍了原井眼上部套管开窗侧钻井、同井场移动井位钻井和附近异井场钻井3种钻接替井的方式。分析了罗家16H-1井、新清溪1井、新856井钻接替井的成功实例。结果表明,天然气勘探开发中的重大发现井,一旦出现井控严重失控,且存在井身结构及工程缺陷时,需要打超长的水泥塞封井。裂缝综合地质预测技术是钻接替井的前提,定向钻井是重要的环节,钻水平接替井不仅增加了钻遇高导斜缝的机遇,而且可增大气井产能。
Three ways to drill successive wells are described,including casing sidetracking in an original well, drilling a new hole within the same well site and drilling a hole in an adjacent other well site.The success examples of drilling successive wells,such as Luojia 16H-1,Xinqingxi 1 and Xin 856,are analyzed.The results have indicated that major gas discovery wells need to be closed by a long cement plug if they are heavily out of control and have shortcomings of hole structure and engineering.For drilling a successive well, the comprehensive geological prediction of fractures is a prerequisite,and directional drilling is a key step. Drilling a horizontal successive well can penetrate much more high dip fractures and increase gas production capacity.
出处
《中外能源》
CAS
2009年第5期68-71,共4页
Sino-Global Energy
基金
国家自然科学基金项目(编号:50674077)的资助
关键词
天然气
钻接替井
定向钻井
套管侧钻井
裂缝预测
水平井
natural gas
drill successive wells
directional drilling
casing sidetracking
fracture prediction
horizontal well
