水平井随钻电磁波测井与双侧向测井响应差异及其解释应用（英文）
发布时间：2018-12-23 18:10
【摘要】：大斜度井/水平井中,随钻电磁波电阻率测井与双侧向测井由于测量原理不同,引起的测井响应特征有着较大差别。首先依据积分方程法模拟了随钻电磁波电阻率测井在大斜度井/水平井中的测井响应特征,采用三维有限元素法模拟了双侧向测井在大斜度井/水平井中的测井响应特征,然后对比分析了二者在水平地层中的测井响应差异和产生的原因。结果表明,水平井中随钻电磁波电阻率测井和双侧向测井响应差异的主要影响因素有:不同井斜角、地层各向异性、地层界面以及泥浆侵入等。随着相对井斜角的增大,随钻电磁波电阻率测井在地层界面处的测井响应异常大,而双侧向测井在地层界面附近受围岩影响逐渐变得平滑;随着相对井斜角的增加,各向异性的影响逐渐增大,但各向异性对双侧向测井的影响程度要小于对随钻电磁波电阻率的影响。这些差异如不能正确认识将导致水平井解释过程中出现偏差。最后根据实际资料,分析如何这些差异进行水平井测井解释。
[Abstract]:In high slope wells / horizontal wells, the characteristics of logging response caused by electromagnetic wave resistivity logging while drilling are different from those of dual lateral logging due to their different measurement principles. Based on the integral equation method, the logging response characteristics of electromagnetic wave resistivity logging while drilling are first simulated in large deviated wells / horizontal wells, and the response characteristics of dual lateral logging in large deviated wells / horizontal wells are simulated by using three dimensional finite element method. Then, the difference of logging response between them in horizontal formation and the causes are analyzed. The results show that the main factors influencing the difference of resistivity logging and dual lateral logging responses in horizontal wells are as follows: different well inclination, formation anisotropy, formation interface and mud intrusion. With the increase of relative well angle, the logging response of electromagnetic wave resistivity logging with drilling at the formation interface is very large, while the dual lateral logging becomes smoother by the influence of surrounding rock near the formation interface. The influence of anisotropy increases gradually with the increase of relative well angle, but the influence of anisotropy on dual lateral logging is less than that on the resistivity of electromagnetic wave while drilling. If these differences are not understood correctly, there will be deviations in the interpretation of horizontal wells. Finally, according to the actual data, this paper analyzes how to interpret these differences in horizontal well logging.
【作者单位】： 中国石化石油勘探开发研究院;中国石油塔里木油田分公司勘探开发研究院;中国石油勘探开发研究院;
【基金】：supported by the National Science and Technology Major Project of China(Nos.2016ZX05014-002-001,2016ZX05002-005-001,and 2017ZX05005-005-005)
【分类号】：P631.81;TE243
[Abstract]:In high slope wells / horizontal wells, the characteristics of logging response caused by electromagnetic wave resistivity logging while drilling are different from those of dual lateral logging due to their different measurement principles. Based on the integral equation method, the logging response characteristics of electromagnetic wave resistivity logging while drilling are first simulated in large deviated wells / horizontal wells, and the response characteristics of dual lateral logging in large deviated wells / horizontal wells are simulated by using three dimensional finite element method. Then, the difference of logging response between them in horizontal formation and the causes are analyzed. The results show that the main factors influencing the difference of resistivity logging and dual lateral logging responses in horizontal wells are as follows: different well inclination, formation anisotropy, formation interface and mud intrusion. With the increase of relative well angle, the logging response of electromagnetic wave resistivity logging with drilling at the formation interface is very large, while the dual lateral logging becomes smoother by the influence of surrounding rock near the formation interface. The influence of anisotropy increases gradually with the increase of relative well angle, but the influence of anisotropy on dual lateral logging is less than that on the resistivity of electromagnetic wave while drilling. If these differences are not understood correctly, there will be deviations in the interpretation of horizontal wells. Finally, according to the actual data, this paper analyzes how to interpret these differences in horizontal well logging.
【作者单位】： 中国石化石油勘探开发研究院;中国石油塔里木油田分公司勘探开发研究院;中国石油勘探开发研究院;
【基金】：supported by the National Science and Technology Major Project of China(Nos.2016ZX05014-002-001,2016ZX05002-005-001,and 2017ZX05005-005-005)
【分类号】：P631.81;TE243
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