关键词: 鱼骨型多分支井, 水平井, 气井, 产能, 井筒压力分布, 计算模型

Abstract: A three-dimensional pseudo-pressure distribution model for horizontal gas wells was developed in an unbounded reservoir.The pressure distribution equations in the formation of the herringbone multilateral gas wells were constructed on the basis of pressure superposition and mirror image reflection theory.The equations of gas flow in the multilateral well bore were constructed in consideration of friction loss,acceleration loss,and mixture loss and gravitation effects.A complete model for gas productivity of the herringbone multilateral well was obtained.The effects of physical property of reservoir,pressure loss of well bore and well configuration on gas productivity of the herringbone multilateral well were analyzed with the gas productivity model.The gas productivity laws of the herringbone multilateral well were obtained.

Key words: herringbone multilateral well, horizontal well, gas well, productivity, well bore pressure distribution, computation model