PRESSURE BUILD UP TEST

PRESENTED BY:PRAJWAL 14MPE25BIRJU 14MPE04

INTRODUCTION

• PRESSURE BUILD UP TEST• INTERPRETATION METHODS1. TYPE CURVE ANALYSIS2. HORNER’S PLOT3. MDH METHOD

TESTING PROCEDURE• PRESSURE RECORDER IS

LOWERED TO THE BOTTOM OF FLOWING WELL

• THE WELL IS CLOSED FOR BUILD UP DURATION(24-96 Hrs.) WITH THE INSTRUEMENT INSIDE THE WELL

• THE RECORDER IS PULLED OUT FROM THE WELL AFTER BUILD UP AND THE RECORDING DATA IS ANALYZED

USES OF BUILD UP TEST ANALYSIS

• TO GET RESOVOIR PRESSURE• TO FIND RESOVOIR PERMEABILTY• TO OBTAIN SKIN FACTOR

TYPE CURVE ANALYSIS

Horner’s Plot

During the infinite acting time period, after wellbore storage effects have diminished So, pD is replaced by logarithmic to exponential integral.

So the equation will be,

Above equation describes a straight line with intercept pi and slope –m.

This is an accurate estimate only for short production periods.

Condition :

Miller-Dyes-Hutchinson(MDH) Analysis