【摘要】：大斜度井/水平井中,隨鉆電磁波電阻率測(cè)井與雙側(cè)向測(cè)井由于測(cè)量原理不同,引起的測(cè)井響應(yīng)特征有著較大差別。首先依據(jù)積分方程法模擬了隨鉆電磁波電阻率測(cè)井在大斜度井/水平井中的測(cè)井響應(yīng)特征,采用三維有限元素法模擬了雙側(cè)向測(cè)井在大斜度井/水平井中的測(cè)井響應(yīng)特征,然后對(duì)比分析了二者在水平地層中的測(cè)井響應(yīng)差異和產(chǎn)生的原因。結(jié)果表明,水平井中隨鉆電磁波電阻率測(cè)井和雙側(cè)向測(cè)井響應(yīng)差異的主要影響因素有:不同井斜角、地層各向異性、地層界面以及泥漿侵入等。隨著相對(duì)井斜角的增大,隨鉆電磁波電阻率測(cè)井在地層界面處的測(cè)井響應(yīng)異常大,而雙側(cè)向測(cè)井在地層界面附近受圍巖影響逐漸變得平滑;隨著相對(duì)井斜角的增加,各向異性的影響逐漸增大,但各向異性對(duì)雙側(cè)向測(cè)井的影響程度要小于對(duì)隨鉆電磁波電阻率的影響。這些差異如不能正確認(rèn)識(shí)將導(dǎo)致水平井解釋過(guò)程中出現(xiàn)偏差。最后根據(jù)實(shí)際資料,分析如何這些差異進(jìn)行水平井測(cè)井解釋。
[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.
【作者單位】： 中國(guó)石化石油勘探開(kāi)發(fā)研究院;中國(guó)石油塔里木油田分公司勘探開(kāi)發(fā)研究院;中國(guó)石油勘探開(kāi)發(fā)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)
【分類號(hào)】：P631.81;TE243

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