复杂多目标井靶区轨道设计方法研究  

STUDY ON TRAJECTORY DESIGN IN TARGET AREA FOR COMPLEX MULTI-TARGET DIRECTIONAL WELL

作　　者：黄根炉[1] 赵金海[2] 赵金洲[2] 

机构地区：[1]中国石油大学 [2]中国石化胜利石油管理局

出　　处：《天然气工业》2006年第10期69-71,共3页Natural Gas Industry

基　　金：国家"十五"科技攻关项目"复杂油气藏配套钻井技术及关键装备研究"(编号:2003BA613A-11);中国石化"十条龙"项目"地质导向钻井技术研究"(编号:JP03009)的研究成果

摘　　要：随着钻井技术的进步,复杂多目标井将在小断块油气田开发和剩余油开采等方面具有广泛的应用前景。复杂多目标井轨道设计的难点在于靶区轨道设计。为此,将多目标井靶区轨道设计归结为无关联靶点间的轨道设计问题,指出了任何一组无关联靶点间的轨道都可根据具体情况选用目标点无方向限制的待钻轨道设计模型、目标点有方向限制的待钻轨道设计模型或3个及3个以上无关联靶点间的轨道设计模型进行设计,提出了解决3个及3个以上无关联靶点间的轨道优化设计的弹性杆挠曲线法。计算实例分析表明,提出的复杂多目标井靶区轨道设计方法是可行的,弹性杆挠曲线法设计的3个及3个以上无关联靶点间的轨道在轨道长度、井斜角变化量、方位角变化量和最大井眼曲率等方面均优于逐点设计法得到的轨道。With the progress of drilling technology, the multi-target directional wells will have a promising prospect in the exploitation of fault oil/gas blocks and in the residential oil development. The bottleneck of complex multi-target directional well trajectory planning is the trajectory design of the well section located in the target area. In the paper, it boils down to the design of trajectory limited by isolated targets. It is pointed out that the trajectory limited by a group of isolated targets can be designed according to one of the models: path-correction design model for a target without direction limitation, path-correction design model for a target at a required direction, and elastomeric beam deflection line model which is firstly presented for the design of trajectory limited by three or more isolated targets. The listed design examples show that the method presented in the paper to design the trajectory of the well section located in the targeted area for complex multi-target directional well is efficient and the elastomeric beam deflection line method is superior to the point-to-point trajectory design method in trajectory length, inclination variation, azimuth variation, and maximum well curvature, and etc.

关 键 词：定向井 分支井 多目标井 钻井 井眼轨道 设计模型 靶区 

分 类 号：TE21[石油与天然气工程—油气井工程]