一种计算变形套管通过能力的新方法
A novel method for calculating the running ability of deformed casing
樊成凯 1周文高 2胡朝浪 1冯民富1
作者信息
- 1. 四川大学数学学院,成都 610064
- 2. 中国石油集团川庆钻探工程有限公司,成都 610051
- 折叠
摘要
研究特定工具在变形套管中的可通过性对油气生产具有重要价值.本文研究了固定截面半径的工具在弯曲及变形井段套管中的最大可通过长度.基于多臂井径数据及钻井资料,本文构建了各深度点处截面的最大内切圆计算模型,并采用几何模型计算了变形套管的三维通过能力.对于多臂井径数据的处理,为解决最小二乘法计算精度不足及内切圆越界问题,本文提出了一种新的求解截面圆心及最大通径的模式迭代搜索法,并将其用于数据解释.算例结果表明,本文提出的方法虽然在计算效率上略低于最小二乘法,但有效降低了计算误差,并确保内切圆不会越界.本文的结果可望被用于提高油气生产效率.
Abstract
The study of passage capability of specific tools through deformed casings is significance in the pro-duction of oil and gas.In this paper,the maximum attainable length of tools with fixed cross-sectional radius in bent or deformed casing sections is considered.Based on the multi-arm wellbore data and well information,a new computational model is developed for the calculation of maximum inscribed circle at various depth points.Three-dimensional passage capability of deformed casings is determined by using the geometric model-ing.In terms of the processing multi-arm wellbore data,a mode iteration search method is proposed to over-come the limitation of calculation accuracy of the least squares method and the issue of inscribed circle exceed-ing boundaries.An example is given to show that,comparing with the least squares method,the new method can effectively reduce the calculation error and prevent the inscribed circle from exceeding boundaries with a slightly lower computational efficiency.It is expected that the obtained results can be exploited to improve the production efficiency of oil and gas.
关键词
水平井/套管/最大内切圆/多臂井径仪/可下入性Key words
Horizontal well/Casing/Maximum inscribed circle/Multi-arm caliper/Running ability引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据