公开(公告)号：WO1994003787A1

公开(公告)日：1994-02-17

申请号：PCT/US1993004947

申请日：1993-05-25

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  PHELPS, Eric, B. ,  COOK, Gary, R. ,  ROSZELLE, Wayne, O.

IPC: G01L19/04

CPC classification number: G01L27/005 ,  G01L9/085

Abstract: Disclosed is a system wherein the compensation for temperature effects on a pressure measurement gauge is accomplished by processing the raw pressure measurement signal from the gauge through a linear differential equation to produce a thermally compensated measurement. The linear differential equation expresses the thermally compensated pressure determination as a relation between a derivative of temperature and a derivative of pressure error. The linear differential equation contains several coefficients having constant values, and these constant values are computed by calibrating the pressure gauge in a pressure tank having a known pressure and temperature. When the gauge is later placed in an oil or gas well, the coefficient values are used to obtain the corrected measured pressure from the raw measured pressure received from the gauge.

Abstract translation: 公开了一种系统，其中对压力测量计的温度影响的补偿通过经由线性微分方程处理来自量规的原始压力测量信号来实现，以产生热补偿测量。 线性微分方程表示热补偿压力确定为温度导数与压力误差导数之间的关系。 线性微分方程包含具有恒定值的几个系数，并且通过校准具有已知压力和温度的压力罐中的压力计来计算这些常数值。 当量规稍后放置在油井或气井中时，系数值用于从从量规接收的原始测量压力获得校正的测量压力。