脉动影响下直管式油基钻井液流变性测量的校正模型研究

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中图分类号：TB9 文献标志码：A文章编号：1674-5124（2026）02-0013-13

Abstract： The prevalent method forautomated，real-time，online，and accurate measurement of drilling fluid rheology is straight-pipe measurement. However， the pulsating flow generated by pumping equipment often leads to significant erors in pressure difference and flow rate data，resulting in low accuracy of the derived rheological parameters. To address this issue， this paper proposes a correction model for straight-pipe drilling fluid rheology measurement under pulsating flow.Through investigation and theoretical analysis of the pulsating flow produced by a diaphragm pump，the variation patterns of outlet fluid flow，pressure， and operating frequency of the diaphragm pump are derived， yielding an expression for outlet flow velocity. This provides the initial inlet parameters for subsequent simulations.Then，3D modeling and simulation are performed on the measuring pipe of the actual experimental setup. Based on extensive simulation results， a correction model for straight-pipe fluid rheology measurement under pulsating flow influence is established. Finally，experiments are conducted using a physically constructed test platform. The rheological parameters calculated after model correction are compared against a rotational viscometer under different flow rates， viscosities，and temperatures.The mean relative deviations of apparent viscosity （AV）， plastic viscosity （PV）， and yield point （YP） are 2.69% 0 2.362% ，and 3.056% ，respectively. The data errors in pressure difference and flow measurement caused by pulsating flow are effectively reduced.

Keywords： drilling fluid rheology; straight pipe measurement; fluid pulsation; simulation analysis; rheology measurementmodel

0 引言

钻井完井过程中，钻井液作为钻井的“血液”，其功能好坏是钻井开采能否顺利成功的决定性因素之二[1]。（剩余14885字）