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USED IN KUWAIT OIL COMPANY (KOC) WEST KUWAIT 1. Crude Oil Crude Oil Assay SARA Analysis & CII * Bottle Test * IFT Measurements Temperature profiles of the selected wells were obtained using PIPESIM software Presented By:
Eng. Shareefa Sulaiman Mulla Ali
Eng. Sara Khalid Al-Mutairi Eng. Eman Ali Al-Muhaiteeb
Dr. Osamah Ali Al-Omair
Eng. Abdulhaq Mohamed Abdullatif Outline * Material Preparation
* Emulsion Analysis
* Experimental Work
* Recommendations Objectives Evaluate the efficiency of the incumbent demulsifier as the emulsion treating chemical that is used in KOC (West Kuwait).
Study the effect of different variables upon the demulsification process.
Investigate the ability to use a new commercial demulsifier more economic and efficient for demulsifying the crude oil emulsion.
Develop a field plan for better and cost effective demulsification process. Material Preparation 2. Chemical Demulsifiers 3. Fresh Water Emulsion Analysis Crude oil samples were gathered from four wells from Umm Gudair field, West Kuwait. [PT 6848] is the demulsifier which is used currently in KOC and the other four new demulsifiers exported from a foreign company The density is 1 g/cc and the salinity is less than 0.05 % SIMDIS Analysis CHNS Elemental Analysis GC Analysis Viscosity Analysis Water Analysis Turbidity & TSS Analysis pH & Salinity Measurement STIFF Diagram Experimental Work * DLS & Microscope * Oil in water analysis Analysis * DEMULSIFIERS SCREENING * EFFECT OF VARIABLES * PARTICLES EVALUATION Demulsifier [PT 6848] Demulsifier [A] Demulsifier [C] Demulsifier [D] Demulsifier [E] Percentage water resolved * Demulsifier [E] is the best candidate.
It separated 68 to 74 % from the water cut percentage of the wells Emulsion separation index A measure of emulsion tightness
0% (no separation) -100% (full separation)
Quoted by the temperature and demulsifier concentration Temperature Interfacial Tension (R/A) ratio Fresh Water Chock-valve Drop Size Distribution Microscope Examination Oil in Water Analysis Simulation Idea of Development Economics DEMULSIFIERS COST FRESH WATER COST INSULATION COST Kuwait University
College of Engineering and Petroleum
Petroleum Engineering Department * The viscosities of emulsions are higher than the viscosity of oil and water.
* High turbidity and TSS amounts will decrease the viscosity of the dried oil sample significantly when compared with its emulsion viscosity.
* Several demulsifiers efficiency were investigated and one candidate was choose depending on the highest percentage of resolved water.
* The interfacial tension was decreased with the increase of demulsifier concentration.
* The higher (R/A) ratio, the looser the emulsion and higher the amount of water resolved.
* As temperature increases, the water separation efficiency increases.
* Insulation of the pipeline for a specified length will maintain the temperature result and result in maximum separation of the water.
* Fresh water injection before the demulsifying point improved the water separation efficiency.
* The water produced can be used for re-injection purposes.
* The selection of the best candidate was cost and demulsifying efficiency dependent.
* Fresh water and pipeline insulation along with optimum demulsifier injection increase Conclusion Recommendations * Field optimization of demulsifier injection should be an on-going task as conditions change over time.
* Efforts should be made to reduce solid contaminations that acts as emulsion stabilizers.
* Acid jobs should be designed with care since it can result in very tight emulsions.
* Crude oil behavior after gathering centers with the dosage of demulsifier are recommended for study.
* Applicability investigation for installation of pre-heaters to heat emulsions should be performed. * Dr. Osama Ali Al-Omair in Petroleum Engineering Department – Kuwait University for supervising the project.
* Team leader Salman Al-Qabandi and Eng. Hussain Al-Khabbaz from KOC - Water Handling (WK) - Operations Group for providing data and samples for the experimental trails.
* Dr. Abdulhameed Al-Hashem and Mr. Suhaib Kholosy in KISR for supporting the experimental work.
* Dr. Abdulwahab Al-musallam, Dr. Krishna Nettem and Eng. Ali Shekeban in Chemical Engineering Department – Kuwait University for providing the Nano Technology Laboratory.
* Petroleum Fluid Research Center (PFRC) in Kuwait University - Research General No. Acknowledgment Acknowledgment Thanks for listening ... Any Questions ???