井眼轨迹单根控制的新计算方法

A new calculation method of well trajectory of joint control

鲁港 钟晓明 李胜中 来建强

LU Gang ZHONG Xiaoming LI Shengzhong LAI Jianqiang

北京四利通控制技术股份有限公司 中石化西南石油工程公司装备处 中国石化中原石油工程公司装备处

Beijing Selton Control Technologies Co., Ltd., Beijing 101102, China Equipment Department, SINOPEC Southwest Petroleum Engineering Company, Chengdu 610031, Sichuan, China Equipment Department, SINOPEC Zhongyuan Petroleum Engineering Company, Puyang 457001, He’nan, China

井眼轨迹控制是定向井工程师的基本工作任务，以前常常凭经验估算控制参数。针对单根的“复合+滑动”钻进过程，使用恒工具面角曲线建立了数学模型；使用最优化思想给出了求解这个数学模型的两个算法，给出了施工参数设计的最优方案。使用理论模型数据对算法进行了大量验证，结果表明，该算法可以以非常高的数值精度(10⁻⁹)反算出理论模型参数；对于实际钻井数据，算法精度为10⁻²，满足工程精度要求。该方法可以应用于现场定向井工程师日常的控制参数设计工作中，结合MWD数据实时采集，在电控系统的钻井反馈实时控制中也有广泛的应用前景。

Well trajectory control is the basic operation task of directional well engineers, and in the past, the control parameters were often estimated according to experience. In this paper, a mathematic model was established based on the constant tool face angle curve for the “combined+sliding” drilling process of joint. Then, two algorithms to solve this mathematical model were provided according to the concept of optimization, and the optimal design scheme of construction parameters was worked out. Finally, the algorithms were verified sufficiently by using the theoretical model data. It is indicated that the algorithms can inversely calculate the theoretical model parameters with quite high numerical accuracy (10). And as for the actual drilling data, the accuracy is 10, which meets the accuracy requirement of the engineering. This method can be used by the on-site directional well engineers to perform daily design of control parameters. And combined with the real-time acquisition of MWD data, its application prospect in the real-time drilling feedback control of electric control system is extensive.

10.13639/j.odpt.2021.02.003