方位远探测反射声波成像测井仪器

Azimuth Remote Exploration Acoustic Reflection Imaging Logging Tool

方位远探测反射声波成像测井仪器利用测量的反射波信息,识别井旁远距离范围内的反射体,定量分析反射体距井筒的距离和方位。该仪器采用相控阵大功率发射技术、方位阵列接收技术以及独创的直接承压式有源发射、接收声系结构,使其能探测距离井筒40m以上某方位的反射体,方位分辨率22.5°。介绍该仪器测量原理、结构设计与特点、性能参数以及方法模拟实验,现场试验验证了其效果,有效地弥补了测井探测深度太浅与地震勘探分辨率较低的缺陷,为深部复杂油气储层的精细描述提供新技术。

The exploration and development of the fractured complex oil and gas reservoirs often need to provide more detailed stratigraphic information in the multidimensional geometric space.The measured information of reflection wave form azimuth remote exploration acoustic reflection imaging logging tool,cannot only identify the reflectors with a remote distance away from the borehole but can also quantitatively analyze the distance and direction of the reflector from the wellbore.The instrument adopts phased array high-power transmission technology,azimuth array receiving technology and original direct-pressure active emission and receiving sound system structure,so that it can detect reflectors located at a certain position above 40 m from the wellbore with azimuth resolution of 22.5°.This paper describes the tool's measurement principle,structural design and characteristics,performance parameters as well as method simulation experiments.The field test has verified its effect and compensates for the defects that the DOI of logging is too shallow and the resolution of the seismic is low,and also provides new technologies for the detailed description of deep complex oil and gas reservoirs.