﻿ 连续管钻定向井工具面角调整方法研究

Study on a Method for Tool Face Re-Orientation with Coiled Tubing Drilling
Hu Liang, Gao Deli
Key Laboratory of Petroleum Engineering Education Ministry, China University of Petroleum (Beijing), Beijing, 102249, China
Abstract:In order to solve the problems in tool face orientation with coiled tubing drilling, this paper presents a method to drill a directional well with a two-section design. Based on the theory of azimuth correcting on an inclined-plane and the skill of re-orientating the tool face, a two-arc directional design model was established, and the corresponding constraint equations set for trajectory deign could be solved using numerical iteration method, so as to finalize the well trajectory design which would meet the requirements of directional drilling. Calculation results from an actual well design showed that re-orientation of tool face could meet the requirements of directional drilling, and the well trajectory was designed as a smooth curve within the all constraints of the well. The study results concluded that the two-arc directional design model could meet the needs of directional drilling and the theoretic design was feasible in drilling practice, so problems with directional correction had been solved that would be useful to the drilling practice on location.
Key words: coiled tubing    hydraulic orientator    tool face adjustment    numerical calculation

1 设计方案 1.1 设计思路

1.2 设计模型 1.2.1 理论依据

1.2.2 建立模型

 图 1 设计模型示意 Fig. 1 Schematic diagram of design model

1.3 求解方法

1.3.1 ω1的计算

1.3.2 ω2的计算

1.3.3 井眼轨道设计参数的求解

2 计算实例 2.1 实例1

 井深增量/ m 井斜角/ (°) 方位角/ (°) 垂深增量/ m 北坐标增量/m 东坐标增量/m 0 20.00 30.00 0 0 0 9.65 24.40 35.31 8.93 3.06 1.98 19.30 28.92 39.05 17.56 6.50 4.60 28.95 33.53 41.86 25.81 10.30 7.85 38.60 38.18 44.05 33.63 14.43 11.70 51.01 43.41 49.17 43.02 19.98 17.60 63.42 48.82 53.37 51.62 25.56 24.57 75.83 54.37 56.92 59.32 31.10 32.55 88.22 60.00 60.00 66.04 36.54 41.44
2.2 实例2

 井深增量/ m 井斜角/ (°) 方位角/ (°) 垂深增量/ m 北坐标增量/m 东坐标增量/m 0 70.00 40.00 0 0 0 10.51 64.93 38.50 4.02 7.51 6.14 21.01 59.88 36.87 8.89 14.87 11.83 31.52 54.85 35.07 14.55 22.03 17.03 42.02 49.85 33.03 20.97 28.91 21.69 48.74 47.26 30.18 25.42 33.20 24.33 55.46 44.74 27.08 30.09 37.44 26.65 62.18 42.32 23.70 34.96 41.62 28.64 68.90 40.00 20.00 40.02 45.72 30.28

3 结论与建议

1) 两段式定向调整方法解决了连续管钻井定向过程中的工具面角调整偏差问题，根据设计模型和数值计算方法开发了相应的连续管定向优化设计软件，该软件使用简单，便于现场应用，为实现连续管钻井定向自动优化控制奠定了基础。

2 ) 文中所述方法理论上切实可行，比传统的经验调整方法更具有现场应用价值，有利于提高连续管定向钻进井眼轨迹的控制效率，降低作业风险。

3) 如何在保证定向要求的同时满足目标点位置要求，需要进一步研究。

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#### 文章信息

Hu Liang, Gao Deli

Study on a Method for Tool Face Re-Orientation with Coiled Tubing Drilling

Petroleum Drilling Techniques, 2015, 43(02): 50-53.
http://dx.doi.org/10.11911/syztjs.201502009