石油钻采工艺2017，Vol.39Issue(3)：298-302,5.DOI:10.13639/j.odpt.2017.03.008
延长油田丛式井网加密水平井直井段交碰风险量化分析
Quantitative analysis on collision risk of vertical hole section of infill horizontal well in cluster well pattern in Yanchang Oilfield
摘要
Abstract
To develop low-permeability and low-abundance oil reservoirs economically and efficiently in Yanchang Oilfield, infill horizontal wells are arranged at the old well sites. Thus, the vertical hole sections in the cluster pattern are dense, so the collision risk is rigorous. To evaluate the collision risk of vertical hole sections accurately, the horizontal displacement deviation of vertical hole sections in horizontal wells in Yanchang Oilfield was analyzed based on actual drilling data. Then, the collision risk of vertical hole sections in infill wells was quantified by means of mathematical statistics. It is indicated that the horizontal displacement deviation of actual trajec-tory of vertical hole section in the same hole depth is in accordance with the normal distribution. And with the deepening of the hole, its mean and variance increase gradually, the shape of normal distribution becomes flatter and flatter, and the hole location become more and more uncertain. This method was applied in horizontal well Xing 4003 Ping 34. It is shown that quantitative analysis on the colli-sion risk of vertical hole section based on probability statistics and confidence calculation can discriminate the collision risk of vertical hole section more accurately, and provides the new reference for the trajectory design of vertical hole section of infill horizontal well in cluster pattern.关键词
加密井网/直井段/水平位移偏差/井眼交碰概率/延长油田Key words
infill well pattern/vertical hole section/horizontal displacement deviation/borehole collision probability/Yanchang Oilfield分类
能源科技引用本文复制引用
杨全枝,张晓斌,吴迪,刘云,郑自刚..延长油田丛式井网加密水平井直井段交碰风险量化分析[J].石油钻采工艺,2017,39(3):298-302,5.基金项目
国家"863"计划重点项目"陆相页岩气水平井钻完井工艺技术攻关"(编号:2013AA064501) （编号:2013AA064501）
陕西延长石油集团公司科技攻关重点项目"延长西部水平井钻采工艺技术研究与应用"(编号:ycsy2012ky-A-06). （编号:ycsy2012ky-A-06）
