石油钻采工艺2012，Vol.34Issue(5)：33-36,4.
超短半径侧钻水平井选层技术界限研究
Layer selection technology threshold study for sidetracked horizontal wells with ultra small radius
摘要
Abstract
The sidetracked horizontal well with ultra small radius has advantages for recover the remaining oil in sand edge or injection imbalance zones. The objective well sites are mainly on low production wells, shut-in wells, casing failure wells, and abandoned wells. But once the well is sidetracked, it could not be recovered. So it is necessary to study the threshold for layer and well selection of sidetracked horizontal wells with ultra small radius. Taking Duanxi pilot zone as an example, based on the numerical simulation orthogonal experiment plan, multiple regression method is taken to set up the correlations between the 10 years' cumulative oil rate of the horizontal well with ultra small radius and the parameters such as effective thickness, dimensionless distance to the layer top, oil/water well spacing, average permeability, average residual oil saturation, penetrating completion degree of the horizontal well. Results show that the regression function accuracy is high, and satisfy the calculation need in field. Through the empirical correlation, together with breakeven analysis, the technology threshold for the main factors of layer selection is determined, therefore, the sidetracked layer of the horizontal well with ultra small radius can be optimized.关键词
超短半径水平井/正交设计/数值模拟/多元回归/技术界限Key words
horizontal well with ultra small radius/ orthogonal design/ numerical simulation/ multiple regression/ technology threshold分类
能源科技引用本文复制引用
杨二龙,王景翠,高玉鑫..超短半径侧钻水平井选层技术界限研究[J].石油钻采工艺,2012,34(5):33-36,4.基金项目
国家自然科学基金重点项目"低渗透油层提高驱油效率的机理研究"(编号:50634020) （编号:50634020）
国家自然科学基金青年科学基金"微观孔隙内原油活化条件的动力学机理研究"(编号:51104030)资助. （编号:51104030）
