3维VSP光纤检波器井下地震采集系统
|
摘要
介绍了一种用于石油勘探的井下3维VSP(Vertical Seismic Profile)采集系统设计方案,实验验证该系统达到了可测量动态范围80dB(可测量最大值与最小之比),系统采集、处理和传输的总延时低于200ms(2kbit/s采样率)的指标,适用于井下VSP采集.系统采用六级光纤加速度传感器组成阵列,其中每级传感器由三个麦克尔逊干涉仪构成.使用高速DSP处理芯片实现相位产生载波(Phase Generated Carrier,PGC)解调等算法以获得地震波信号;同时应用多个ARM处理器设计光纤检波器阵列控制器以及阵列内部总线.
A down-hole seismic survey system that can be applied in three dimensions vertical seismic profile(VSP)detection in petroleum exploration is demonstrated.The results of experiments show that the system has a dynamic measurement range of 80dB(ratio of maximum to minimum value)and the total delay for signal collection,process and communication is less than 200ms @ 2k bit sample rates.An array consisting of six fiber-optic accelerometers(receivers)is applied in this system.Each receiver is comprised of three fiber-optic Michelson interferometers.High-speed DSP chips are employed to realize the PGC demodulation and other algorithms to obtain the seismic information.Multi-ARM CPUs are introduced into the system to design the fiber-optic accelerometer array controller and the receiver array local bus.The design and experiments of the system are given in this paper in detail.
A down-hole seismic survey system that can be applied in three dimensions vertical seismic profile(VSP)detection in petroleum exploration is demonstrated.The results of experiments show that the system has a dynamic measurement range of 80dB(ratio of maximum to minimum value)and the total delay for signal collection,process and communication is less than 200ms @ 2k bit sample rates.An array consisting of six fiber-optic accelerometers(receivers)is applied in this system.Each receiver is comprised of three fiber-optic Michelson interferometers.High-speed DSP chips are employed to realize the PGC demodulation and other algorithms to obtain the seismic information.Multi-ARM CPUs are introduced into the system to design the fiber-optic accelerometer array controller and the receiver array local bus.The design and experiments of the system are given in this paper in detail.
引文
[1]DAKI NJ,CULSHAWB.Optical Fiber Sensors:Principle and Components[M].Boston:Artech House,1989.
[2]DI NG Ming-li,WEI Wei,WANG Qi.Design of a nine-accelerometer non-gyro inertial measurement unit[C].SPIE,2004,5634:739-747.
[3]UDD E.Overview of fiber-optic sensors[J].Rev Sci Instrum,1995,66(1):4015-4030.
[4]TAO Fa,WANG Hui-nan.A study on a novel Fiber-optic accelerometer using a GRI Nlens[J].Acta Photonica Sinica,2005,34(7):1057-1061.陶发,王惠南.一种新型GRI N透镜光纤加速度计的研究[J].光子学报,2005,34(7):1057-1061.
[5]PECHSTEDT R D,JACKSON D A.Design of a compliant-cylinder-type fiberoptic accelerometer:theory and experi ment[J].Appl Opt,1995,34(16):3009-3017.
[6]PENG Bao-jin,LI AO Mao,Liao YAN-biao,et al.Study on measuring sensitivity of fiber-optic hydrophone[J].Acta Photonica Sinica,2005,34(11):1633-1638.彭保进,廖茂,廖延彪,等.光纤水听器灵敏度测试研究[J].光子学报,2005,34(11):1633-1638.
[7]DANDRIDGE A,TVETEN A B,GI ALLORENZI T G.Homodyne demodulation scheme for fibre-optic sensors using phase generated carrier[J].IEEE Journal of Quantum Electronics,1982,18(10):1647-1653.
[8]COLE J H.DANVER B A,BUCARO J A.Synthetic-heterodyne interferometric demodulation[J].IEEE Journal of Quantum Electron,1982,QE-18(4):694-697.
[9]MARCUSE D.Opti mal electrode design for integrated optics modulators[J].IEEEJournal of Quantum Electron,1982,QE-18(3):393-398.
[10]BO Lin-hou,LI AO Yan-biao,ZHANG Min,et al.The i mprovement on PGC demodulation method based on optical fiber interferometer sensors[J].Acta Photonica Sinica,2005,34(9):1324-1327.柏林厚,廖延彪,张敏,等.干涉型光纤传感器相位生成载波解调方法改进与研究[J].光子学报,2005,34(9):1324-1327.
[11]TANG Dong-lin,CHEN Cai-he,CUI Yu-ming,et al.Three-component hybrid-integrated optical acceleration seismic geophone based on photoelastic waveguide[J].Acta Photonica Sinica,2005,34(7):1062-1065.唐东林,陈才和,崔宇明,等.三分量光弹波导混合集成加速度传感器[J].光子学报.2005,34(7):1062-1065.
[2]DI NG Ming-li,WEI Wei,WANG Qi.Design of a nine-accelerometer non-gyro inertial measurement unit[C].SPIE,2004,5634:739-747.
[3]UDD E.Overview of fiber-optic sensors[J].Rev Sci Instrum,1995,66(1):4015-4030.
[4]TAO Fa,WANG Hui-nan.A study on a novel Fiber-optic accelerometer using a GRI Nlens[J].Acta Photonica Sinica,2005,34(7):1057-1061.陶发,王惠南.一种新型GRI N透镜光纤加速度计的研究[J].光子学报,2005,34(7):1057-1061.
[5]PECHSTEDT R D,JACKSON D A.Design of a compliant-cylinder-type fiberoptic accelerometer:theory and experi ment[J].Appl Opt,1995,34(16):3009-3017.
[6]PENG Bao-jin,LI AO Mao,Liao YAN-biao,et al.Study on measuring sensitivity of fiber-optic hydrophone[J].Acta Photonica Sinica,2005,34(11):1633-1638.彭保进,廖茂,廖延彪,等.光纤水听器灵敏度测试研究[J].光子学报,2005,34(11):1633-1638.
[7]DANDRIDGE A,TVETEN A B,GI ALLORENZI T G.Homodyne demodulation scheme for fibre-optic sensors using phase generated carrier[J].IEEE Journal of Quantum Electronics,1982,18(10):1647-1653.
[8]COLE J H.DANVER B A,BUCARO J A.Synthetic-heterodyne interferometric demodulation[J].IEEE Journal of Quantum Electron,1982,QE-18(4):694-697.
[9]MARCUSE D.Opti mal electrode design for integrated optics modulators[J].IEEEJournal of Quantum Electron,1982,QE-18(3):393-398.
[10]BO Lin-hou,LI AO Yan-biao,ZHANG Min,et al.The i mprovement on PGC demodulation method based on optical fiber interferometer sensors[J].Acta Photonica Sinica,2005,34(9):1324-1327.柏林厚,廖延彪,张敏,等.干涉型光纤传感器相位生成载波解调方法改进与研究[J].光子学报,2005,34(9):1324-1327.
[11]TANG Dong-lin,CHEN Cai-he,CUI Yu-ming,et al.Three-component hybrid-integrated optical acceleration seismic geophone based on photoelastic waveguide[J].Acta Photonica Sinica,2005,34(7):1062-1065.唐东林,陈才和,崔宇明,等.三分量光弹波导混合集成加速度传感器[J].光子学报.2005,34(7):1062-1065.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心