摘要
大斜度井、水平井的钻井技术迅速发展,二维轴对称地层条件下的井眼校正方法和图板均不适合于大斜度井,有必要研究双侧向仪器在新的测井环境下的响应,为正确的测井资料解释和仪器设计制造提供依据。运用有限元方法,采用适当的网格划分,对大斜度井仪器偏心情况下双侧向测井响应进行数值模拟,研究不同相对倾斜角情况下仪器偏心引起的双侧向的不同响应,对不同条件下双侧向响应,建立校正图版,拟和得到可用于现场、精度较高的快速计算公式,从而为现场进行偏心条件下井眼校正提供有力的理论基础。
With the rapid development of drilling technology in highly deviated well and horizontal wells,the method of borehole correction and its charts in the 2D axisymmetric formation are no longer suitable for highly deviated wells. The response of dual lateral logging tool in the new environments is studied to provide scientific basis for logging data interpretation and logging tool design. Based on the finite element method,the dual lateral logging response is numerically simulated using proper mesh generation. The different responses of dual lateral logging induced by tool eccentricity in the wells with different inclination angles are respectively studied. The corrected charts for dual lateral logging response under different conditions are plotted to obtain rapid calculation formulas with high accuracy which are applicable for fields by fitting. This provides powerful theoretical basis for borehole correction of eccentricity in fields.
出处
《石油仪器》
2009年第5期58-61,101-102,共4页
Petroleum Instruments
基金
国家科技重大专项专题(2008ZX05035-02)
山东自然科学基金(Y2007F25)
关键词
双侧向
井眼校正
大斜度井
有限元
dual lateral logging
borehole correction
highly deviated well
finite element method
