激光光纖壓力檢測(cè)技術(shù)在海洋石油勘探中的應(yīng)用研究

介紹了一種用于海洋石油勘探的反射式強(qiáng)度調(diào)制型光纖壓力傳感器。依據(jù)新穎的網(wǎng)絡(luò)補(bǔ)償技術(shù),提高了強(qiáng)度調(diào)制型光纖傳感器的長(zhǎng)期穩(wěn)定性和檢測(cè)精度。從理論上描述了測(cè)量誤差補(bǔ)償機(jī)理。初步的位移測(cè)試實(shí)驗(yàn)驗(yàn)證了所設(shè)計(jì)研制的傳感器的正確性和實(shí)用性,壓力的測(cè)量精度可達(dá)到011 MPa。將這種傳感器應(yīng)用于海洋井下壓力的檢測(cè),可具有良好的穩(wěn)定性和極大的實(shí)用價(jià)值,測(cè)量穩(wěn)定性可以達(dá)到0115 %。
關(guān)鍵詞　光纖壓力傳感器,激光測(cè)量,石油勘探,補(bǔ)償技術(shù)
Abstract 　A novel reflex fiber2optic pressure sensor used in the offshore oil exploration was proposed. Based on the original network compensation technique , the long2term stability and the measurement accuracy of the intensity2modulated fiber2optic sensors were tremendously improved. The error compensation principle of the sensor was theoretically described. Preliminary experimental results indicated the feasibility and practicability , and the estimated pressure measurement accuracy will reach 0. 1 MPa. The measurement stability can reach 0. 15 % when it was applied on the underground crude oil exploration.
Key words 　fiber2optic pressure sensor , laser measurement , offshore oil exploration , compensation technique