关键词: 鱼骨井, 复杂结构井, 半解析模型, 产能预测, 分支井形态, 参数优化

Abstract:

The effects of lateral symmetry and camber on the production of herringbone wells were analyzed by using the semi-analytical model. Different angles, number and spans for laterals had different effects on the production of herringbone wells. The contribution of the main wellbore in the asymmetrical herringbone well is smaller than that of the symmetrical herringbone well, but the total production of the asymmetrical herringbone well is bigger than that of the symmetrical herringbone well. The curved laterals will cause less production than the deviated laterals. The bigger lateral angle results in the higher production for herringbone wells. The contribution of 1/3 section to the lateral end accounts about 50% of the total lateral contribution. Under the same total length of laterals, the production of well with two laterals on different sides of the main wellbore is the highest. The laterals should be put as near as possible to the middle part of the main wellbore, there exists an optimum span for the laterals.

Key words: herringbone well, complex structure well, semi-analytical model, production forecasting, configuration of laterals, parameter optimization