井下注入水颗粒度在线检测光学系统优化设计  

Optimization Design of Optical System for On-Site Underground Injection Water Particle Size Detection

作　　者：贾德利[1] 王全宾 党博石[2] 金思宇 刘英[2] Jia Deli;Wang Quanbin;Dang Boshi;Jin Siyu;Liu Ying(Research Institute of Petroleum Exploration&Development,PetroChina Company Limited,Beijing 100083,China;Precision Instrument and Equipment R&D Center,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,Jilin 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国石油天然气股份有限公司勘探开发研究院,北京100083 [2]中国科学院长春光学精密机械与物理研究所精密仪器与装备研发中心,吉林长春130033 [3]中国科学院大学,北京100049

出　　处：《激光与光电子学进展》2020年第19期197-202,共6页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2018YFE0196000)。

摘　　要：针对当前水驱开发油田井下注入水的颗粒度难以实现外场在线检测的技术难题,设计了一个基于光学散射原理的注入水颗粒度的在线检测光学系统。采用波长为640 nm的激光光束,通过4×准直扩束系统获得了8 mm的照明孔径。利用光瞳匹配和像差平衡,完成了直径为42 mm的紧凑型光学系统的优化设计,该系统可实现1~100μm粒径的井下实时在线检测。光学系统的焦距为50 mm,视场角为17°,通光口径为8 mm,所有视场点斑半径均小于6μm,可有效避免非散射光对感光环带能量的干扰。利用样机对标准颗粒试样进行检测,测试误差小于5%,满足设计要求,从而验证了设计系统的可行性和合理性。Aiming at the technical challenge that it is difficult to realize the on-site detection of the particle size of the underground injection water for the water-drive oilfield development,we present a design concept of an optical system based on the optical scattering principle for the on-site injection water particle size detection.Using a laser beam with a wavelength of 640 nm and a 4× collimated beam expander system,we obtain an 8 mm illumination aperture.Using pupil matching and aberration balance,we achieve the optimal design of a compact optical system with a diameter of 42 mm,which meets the particle size detection requirements in the 1-100μm range and has the ability to realize the real time underground on-site detection.The focal length of the optical system is 50 mm,the field of view is 17°,the aperture is 8 mm,and the spot radius within the field of view is less than 6μm,which can effectively avoid the interference of non-scattered light on the energy of the photosensitive ring.The detection of standard particle samples via prototype shows that the test accuracy is less than 5%,which meets the design requirements and thus verifies the feasibility and rationality of the designed system.

关 键 词：非线性光学 光学散射 水驱开发 颗粒尺寸 在线检测 光学设计 

分 类 号：O436.2[机械工程—光学工程]