过钻具存储式双侧向地层响应模型方法研究

Study on the formation response model of through drill pipe storage laterolog tool

电缆双侧向仪器在大斜度井和水平井等复杂井况下测井往往受井眼条件限制,不能正常取得合格资料。过钻具存储式双侧向测井方法能够有效解决这一问题。文章利用数值模拟方法确定探测器的结构参数,从仪器常数、环境影响因素等方面研究了过钻具存储式双侧向电极系探测特性。过钻具双侧向仪器探测特性与电缆测井中的常规双侧向接近,响应曲线受井眼影响和围岩影响均小,该仪器能够替代同类电缆测井仪器用于复杂井况的测井应用中。

Wireline laterolog tool is often limited by borehole conditions in highly deviated and horizontal wells, and other complex condition wells, which can not achieve qualified data. Through drill pipe storage laterolog tool can effectively solve the problems. The structural parameters of the detector are determined with the use of numerical simulation method, and the detection characteristics of the electrode system is studied from the instrument constant K and the environmental impact factors, etc.. The detection characteristics of the through drill pipe storage laterolog tool is close to that of the conventional wireline laterolog tool. The response curves are small affected by the borehole and the neighboring rocks. The instrument can substitute the wireline laterolog tool in the applications for complex well logging.