标题:
多目标水平井轨道设计方法研究Study on Design Method of Multi-target Horizontal Well Track
作者:
党文辉, 罗科海, 罗增, 陈伟峰, 熊超, 蒋振新
关键字:
多目标水平井, 控制点, 折线靶, 井眼轨道, 设计方法Multiple Target Horizontal Well, Control Point, Polygonal Line Target, Well Trajectory, Design Method
期刊名称:
《Journal of Oil and Gas Technology》, Vol.40 No.1, 2018-02-15
摘要:
多目标水平井通过设计多个控制点或目标段，使井眼轨道最大限度地在油层中延伸，以此来提高储层钻遇率和单井产量。随着地质导向技术的快速发展，使得多目标水平井在小油层、断块油层、薄油层以及剩余油开采等方面具有广阔的应用前景。然而，其设计目标不再是一简单的水平段，而是由多个控制目标构成，因此，加大了轨道设计的约束和难度。基于空间圆弧轨道理论，建立了多目标水平井轨道设计一般数学模型。利用矢量分析理论求得了设计变量的解析表达式，并开发了专用轨道设计软件，能够在多约束条件下快速、准确地设计出合理的井眼轨道。
By designing multiple control points or target zones in multi-target horizontal wells, the well track could be extended in the reservoirs at maximum level, by which the drilling rate and single well yield were enhanced. With the rapid development of geosteering technology, the multi-target horizontal wells had application prospects in the development of small layers, fault reservoirs, thin reservoirs and remaining oil. Therefore, the designing target was no longer a single horizontal section, and it was composed of multi-control targets, so the trajectory design was greatly constrained and difficult. Based on the theory of space arc trajectory, a general mathematical model for multi-target horizontal well design was established. A vector analysis theory is used for deriving analytic expression of variables of design, and a special software for trajectory design is developed for rapid and accurate design of well tracks under multi-constraining conditions.