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Paper Information

Title: 

RELATIVE PERMEABILITY, CAPILLARY PRESSURE AND USBM WETTABILITY INDEX DETERMINATION IN A HIGHLY ASPHALTENIC OIL RESERVOIR

Type: PAPER
Author(s): SHARIFI G. HAMID*,NEMATZADEH MOSTAFA,SALIMI D. YASER,MAHMOUDI BEHNAM
 
 *RESEARCH INSTITUTE OF PETROLEUM INDUSTRY (RIPI), WEST BLVD., NEAR AZADI SPORTS COMPLEX, TEHRAN, IRAN
 
Name of Seminar: INTERNATIONAL CONFERENCE OIL, GAS, PETROCHEMICAL AND POWER PLANT
Type of Seminar:  CONFERENCE
Sponsor:  SHERKATE TAVONI AMOZESHI PAZHOHESHI VESTA
Date:  2012Volume 1
 
 
Abstract: 

MOST OF THE TROUBLES CONCERNING DETERMINATION OF WATER-OIL RELATIVE PERMEABILITY AND CAPILLARY PRESSURE OF RESERVOIR ROCKS ARISE FROM DISCREPANCIES IN THE WETTABILITY OF STUDIED RESERVOIR AND MEASURED LABORATORY DATA, WHICH MAKES THE RESULTS UNRELIABLE AND DOUBTFUL. IN CORE STUDY EXPERIMENTS, WHEN LIVE RESERVOIR OIL IS OUT OF REACH, DEAD CRUDE OIL IS MAINLY USED TO ESTABLISH RESERVOIR WETTABILITY. BUT MOST OF THE TIMES IT IS UNUSABLE FOR RELATIVE PERMEABILITY AND CAPILLARY PRESSURE EXPERIMENTS.
IN THIS STUDY THE EFFECT OF USING HIGHLY ASPHALTENIC DEAD CRUDE OIL ON THE RELATIVE PERMEABILITY, CAPILLARY PRESSURE AND USBM WETTABILITY INDEX EXPERIMENTS WAS INVESTIGATED BY APPLYING THE "RESTORED-STATE" APPROACH. THE TESTS WERE PERFORMED ON SOME CORE PLUG SAMPLES OF A CARBONATE RESERVOIR FROM THE SOUTH-WEST OF IRAN. DUE TO ASPHALTENE AND RESIN PRECIPITATION AND CLOGGING IN THE PORE SPACES NO REPRESENTATIVE RESULTS WERE OBTAINED, HENCE, BUFFER SOLVENT WAS INJECTED INTO THE SAMPLES TO REMOVE THE BULK OF CRUDE OIL BEFORE USING SYNTHETIC MINERAL OIL FOR PERFORMING THE EXPERIMENTS. THE RECORDED DATA FROM RELATIVE PERMEABILITY EXPERIMENTS WERE SIMULATED BY SENDRA CORE FLOW SIMULATOR AND COMPARED WITH CONVENTIONAL JONES AND ROSZELLE CALCULATION METHOD. BOTH USBM AND CRAIGE RULES OF THUMB SHOWED OIL-WETNESS CHARACTERISTICS.

 
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