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Paper Information

Title: 

ENHANCING THE SPONTANEOUS IMBIBITION PROCESS IN NATURALLY FRACTURED RESERVOIRS THROUGH WETTABILITY ALTERATION USING: NANOPARTICLES

Type: PAPER
Author(s): BALAGHI MEHDI*,JAFARI FARSHAD,JAFARI IMAN
 
 *UNIVERSITY OF TECHNOLOGY PETROLEUM UNIVERSITY OF TECHNOLOGY, AHWAZ, 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: 

NATURALLY FRACTURED RESERVOIRS ARE CHARACTERIZED BY HAVING LOW-PERMEABILITY MATRIX BLOCKS SURROUNDED WITH FRACTURES OF HIGH HYDRAULIC CONDUCTIVITY. WATER FLOODING PROCESS IN SUCH RESERVOIRS IS SUCCESSFUL IF THE MATRIX BLOCKS HOLDING THE DOMINANT FRACTION OF THE RESERVOIR POROSITY, ARE ABLE TO IMBIBE THE INJECTED WATER (WATER-WET) AND EXPEL THE OIL INTO THE FRACTURE SYSTEM AND FINALLY TO THE PRODUCTION WELL. THIS MECHANISM REFERRED TO AS SPONTANEOUS IMBIBITION OF WATER INTO THE MATRIX BLOCKS IS AN EFFICIENT METHOD TO INCREASE OIL RECOVERY FROM FRACTURED RESERVOIRS. HOWEVER, MOST NATURALLY FRACTURED RESERVOIR ROCKS ARE MIXED- TO OIL-WET AND DO NOT IMBIBE THE INJECTED WATER, WHICH TRANSLATES INTO LOW-EFFICIENCY WATER FLOOD RECOVERY.
TO ENHANCE THE SPONTANEOUS IMBIBITIONS PROCESS, LOW CONCENTRATION OF SURFACTANTS OR LIP PHOBIC AND HYDROPHILIC POLYSILICON (LHP), IS DISSOLVED INTO THE INJECTED WATER TO INDUCE WETABILITY ALTERATION OF THE RESERVOIR ROCK BY CHANGING THE WETABILITY OF THE ROCK TOWARD A MORE WATER-WET STATE. THIS IS THE MAIN SUBJECT OF THIS STUDY.
IN CONCLUSION, OIL RECOVERY CAN OBVIOUSLY BE IMPROVED BY FLOODING WITH HYDROPHILIC NANOMETER POWDERS BY CHANGING THE WETABILITY OF THE ROCK TOWARD A MORE WATER-WET STATE AS SHOWN BY THE SINGLE BLOCK SIMULATION MODEL PRESENTED AT THIS STUDY. SINCE BY FLOODING WITH HYDROPHILIC NANOMETER POWDERS PERMEABILITY DECLINE FOR THE RETENTION OF NANOPARTICLES IN POROUS MEDIA, IT IS SUGGESTED THAT AN LHP CONCENTRATION RANGING FROM 2.0–3.0% PERCENT BY VOLUME IS PREFERABLE TO ENHANCE OIL RECOVERY.

 
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