PVT Publications

Automated Method for smoothing Experimental Flash Liberation PVT Data

 H.Y. Al-Yousef, M.A. AL-Marhoun,  King Fahd U. of Petroleum & Minerals

Abstract:

The present method used by petroleum engenders to smooth experimental flash liberation data involves graphical technique to obtain the bubblepoint volume. A trail-and-error procedure that utilizes the Y-correlation is then used to obtain the bubblepoint pressure. The data points above the bubblepoint pressure are smoothed using a graphical technique or least-squares regression.

The smoothing technique presented in this study is a nonlinear parameter estimation approach. It smooths the data points above and below the bubblepoint pressure and determines the bubblepoint volume and bubblepoint pressure simultaneously.

Other advantages of this approach are that it avoids trail-and-error procedure and provides a quantitative measure of the results by calculating confidence limits on the estimated parameters. It was also demonstrated that the new correlation introduced (X-correlation) is more sensitive to the bubblepoint pressure.

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