摘要
本文基于随钻测井和随钻测量资料,通过对水平井、大位移井等在钻进时测量的实时数据分析,建立自然伽马GR、深探测电阻率Rt与储层厚度H关系模型,以及随钻测井仪器的探测深度、传感器到钻头的距离与地层界面的几何关系模型,计算钻头在地层中的位置和钻头上下倾钻进方向,使钻头沿设计的井眼轨迹或实际地质目标钻进,尽可能地钻达理想的靶点,起到对钻井地质导向的作用。将此法应用于某油气田的水平井地质导向钻井中,明显地提高了有效储层的钻遇率。
Based on LWD and MWD data, two models are established through analysis of the real-time data during drilling in horizontal wells and extended reach wells, ect. One is the relationship model between natural gamma GR, deep investigation resistivity Rt and reservoir thickness H. The other is the geometrical relationship model of investigation depth of the LWD logging tool, the distance between transducer to bit and the formation boundary. They can be used to calculate the bit position in strata and direction of drilling to make the bit drill along the designed well track or practical geologic objective as much as possible to the ideal target spot, which play geosteering role in drilling.This method has been applied in geosteering drilling in a horizontal well of an oilfield. It improves the probability of penetration in effective
出处
《国外测井技术》
2007年第6期19-21,24,共4页
World Well Logging Technology
基金
《塔里木盆地声波成像测井资料工程应用研究与软件实现项目》的部分研究成果。
关键词
随钻测井
随钻测量
钻头位置
相对夹角
探测半径
logging while drilling
measurement while drilling
bit position
relative separation angle
radius of investigation
