Then it constructs the flow model within gas reservoirs, flow model within the well bore of horizontal Wells and the mathematical model of the optimized length in the horizontal sector.
其次是建立了气藏内流动模型、水平井井筒内流动模型、水平段最优长度数学模型，在建立模型过程中考虑了水平段内摩阻损失和流动状态对水平井产能的影响。
Obstacle-free sector is a sector formed by an arc originating at the reference point of the edge of a helideck and extending outward in the horizontal plane level with the elevation of the helideck.
无障碍区域是由一个起于直升机甲板边缘的基准点并在直升机甲板的水平面向外延伸的弧形所形成的区域。
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