基于聲波處理技術(shù)的鉆井環(huán)空動液面監(jiān)測方法

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Hao Weiwei，Wang Ying，Zhang Siyuan，etal.Monitoring method for working fluid level in driling annulus based on acoustic processing technology [J]. China Petroleum Machinery，2O25，53（5）：18-29.

關(guān)鍵詞：環(huán)空動液面；聲波處理技術(shù)；SVMD；動液面監(jiān)測；聲波信號處理；AMDF中圖分類號：TE28 文獻標識碼：A DOI：10.12473/CPM.202405029

Monitoring Method for Working Fluid Level in Drilling Annulus Based on Acoustic Processing Technology

Hao Weiwei1Wang Ying1Zhang Siyuan2Wang Min3 Wang Wei1Li Mu1Xu Baochang2 （1.CNPCEngineerin TclogyR&DmanyLimied；2llgeofArtifcal Intellience，naUniestyfeo（Beijing）；3.OiladGasReseroirGeologyInstituteofKelaOilandGasProductionManagementArea，PetroChinaTarimOifeldCompany）

Abstract：The monitoring of working fluid level in the annulus is of great significance for judging the abnormal working conditions in the welbore.However，due to complex downhole environment，the conventional acoustic methodcannot ensure areal-time and accurate monitoring.In this paper，the echo characteristics were combined with the acoustic processing technology to achieve thereal-time monitoring of working fluid level in the annulus.First，successive variational mode decomposition （SVMD）was used to filter the downhole echo signals. Second，the Holtling T2 test method was used to detect the position of fluid level echo，and then the combined algorithm of short-time autocorrelation function （ACF）and average amplitude diference function （AMDF）was used to detectthe average period of collar echoes.Finally，the downhole acoustic transit timeand average acoustic velocity were determined to achieveareal-time monitoring of the working fluid level in the anulus.The test results show that the proposed methodcan efectively identifythe fluid level echoes at different depths，and canachieve a realtime measurement while ensuring a relative error of less than 0.8% ， meeting the requirements for data of working fluid level in the annulus during driling.This study has a practical significance for monitoring downhole accidents.

Keywords： working fluid level in the annulus； acoustic processing technology；SVMD；working fluid level monitoring； acoustic signal processing； AMDF

0引言

鉆井是油氣勘探開發(fā)過程中的重要環(huán)節(jié)，隨著鉆井深度的增加，井控安全要求逐漸嚴格[1]。（剩余16380字）