摘要
通过井筒三维建模和井筒成像仿真,研究了井筒图像的失真机理,提出了一种基于井筒截面轮廓检测和不动点定位的井筒可视化检测图像失真校正方法,推导了不动点坐标计算公式,通过图像重采样和映射变换,得到了井筒偏心校正图像和展开变换图像。实际应用效果表明,利用该方法对实际测井资料进行处理,可消除图像的变形失真,得到井筒管壁的360°全景平面展开图像,进一步合成井筒表面的三维立体图像,为井筒可视化检测的主观评价提供全新的视角,为定量分析奠定了基础。
Through 3D modeling and imaging simulation of wellbore,the mechanism of wellbore image distortion is studied.A visual image distortion correction method of wellbore based on wellbore cross-section contour detection and fixed point positioning is proposed.The calculation formulas of fixed point coordinates are derived.The wellbore eccentricity correction image and unfolding transformation image are obtained through image resampling and mapping transformation.The practical application shows that the method can eliminate the distortion of the image by processing of actual logging data,and obtain the 360°panoramic plane unfolded image of the wellbore wall,and further synthesize the three-dimensional surface image of the wellbore,which provides a new perspective for the subjective evaluation of wellbore visual detection and lays a foundation for quantitative analysis.
作者
严正国
汤英
王旭
陈磊
YAN Zhengguo;TANG Ying;WANG Xu;CHEN Lei(Key Laboratory of Shaanxi Province for Gas-Oil Logging Technology,Xi'an Shiyou University,Xi'an,Shaanxi 710065,China;Changqing Downhole Technology Company,Petrochina Chuanqing Drilling Engineering Co.,Ltd.,Xianyang,Shaanxi 712000,China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2020年第6期107-114,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家科技重大专项(2016ZX05060)
陕西省光电传感测井重点实验室开放基金(09JS042)
陕西省教育厅重点实验室项目(15JS097,11JS051)。
关键词
图像失真校正
图像处理
可视化检测
三维建模
image distortion correction
image processing
visual detection
three-dimensional modeling
