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U nited A rab Emirates U niversity C ollege of E ngineering. Graduation Project (I) Course Graduation Project Code: PETE 585 Submitted for Partial Fulfillment of the B.Sc. Degree in Petroleum Engineering.

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U nited a rab emirates u niversity c ollege of e ngineering

United Arab Emirates University

College ofEngineering

Graduation Project (I) Course

Graduation Project Code: PETE 585

Submitted for Partial Fulfillment of the

B.Sc. Degree in Petroleum Engineering

Marwan Waleed alkhalifi 970710280 Walid Mohed AbdullHay 970711290

AbdulMohsen mohamed 980710963

Abdulaziz Mohamed 970710613


U nited a rab emirates u niversity c ollege of e ngineering

DESIGN A TECHINQUE OF FORMATION DAMAGE

REMOVAL OF UAE OIL RESERVIOR


Acidizing treatment
Acidizing Treatment

  • The aim of the acidizing.

  • The result of the acidizing.

  • Acidizing in the well.


The carbonate rock
The Carbonate Rock

  • The rock that our experiment has been run on is from Hafit mountain.

  • The rock should be one big piece?

  • Why we choose rock from Hafit mountain?



Core samples
Core Samples

  • Cutting the big rock into small core sample.

  • Eight core sample.

  • The dimensions of these core sample.




Saturate the core with water
SATURATE THE CORE WITH WATER

  • The procedure for the experiment:

    • Put the core in sealed chamber.

    • Start the vacuum pump which are connected to the sealed chamber.

    • Keep the vacuum pump socking the air in the chamber for 24 hour.

    • The vacuum pump will sock until pressure inside the chamber is -150 psi.

    • After that we open the valve that are connected to the saucer which contain brine water.

    • The brine salt is 50,000 ppm in water (25 gm brine in 500 ml water).



U nited a rab emirates u niversity c ollege of e ngineering

Core Sample

Brine Water

Sealed Chamber

Vacuum Pump


The porosity of the core sample
THE POROSITY OF THE CORE SAMPLE

  • The weight of the core when it is dry should be taken.

  • The weight of the core when it is saturated with water should be taken.

  • Applying the equation we can find the porosity of each core.

  • The data and result for the different cores are been encountered in the table.



The permeability of the core sample
The Permeability of the Core Sample

  • The core laboratories has been used to know the flow rate of the water passing through the core.

  • This flow rate is calculated from the volume of the water passing the core divided by the time took for the water to accumulate in the tube.

  • From the flow rate that been calculated then the permeability can be calculated from an specific equation.



U nited a rab emirates u niversity c ollege of e ngineering

Pressure Control

Nitrogen Cylinder

Pressure Gauge

Overburden Pressure Pump




The oil saturation irreducible water saturation
The oil saturation & irreducible water saturation

  • The oil has been injected into the core sample to saturate it with oil.

  • The core laboratories has been used to know the volume of the oil with water passing through the core.

  • The volume of the water passing through the core is been encountered and we should know the total volume of water accumulated in the tube.

  • From the volume of the water we can calculate the irreducible water saturation from a specific equation.


U nited a rab emirates u niversity c ollege of e ngineering

Pressure Control

Nitrogen Cylinder

Pressure Gauge

Overburden Pressure Pump



Strategy of the treatment
Strategy of the treatment

  • Effect of Rock permeability

  • Effect of HCL concentration

  • Effect of Flow Rate


Effect of hcl con
Effect of HCL Con.

  • Q=1.0 cc/m


Effect of rock permeability
Effect of Rock Permeability

  • HCL concentration = 15% wt.

  • Q=1.0 cc/min


Effect 0f flow rate
Effect 0f Flow Rate

  • Concentration of HCL=15% wt


Sem scanning electronic macroscopic
SEM (Scanning Electronic Macroscopic)

  • 1 mm2.

  • Magnification x1000.



Preparation of the different hcl concentration
Preparation of the Different HCL Concentration

  • For 10% HCL we dissolved 277.7 ml conc. HCL(36%) and add to it 1000 ml of H2O.

  • For 15% HCL we dissolved 416.6 ml conc. HCL(36%) and add to it 1000 ml of H2O.


Volume of the acid
Volume of the Acid

  • For 20% HCL we dissolved 555.55 ml conc. HCL(36%) and add to it 1000 ml of H2O.

  • The volume of the acid has been used is 30% of the pore volume.

    For AM1

  • VHCL= 0.3 PV

  • VHCL= 0.3 * 3 cc = 0.9 cc


The procedure of the experiment for the effect of the flow rate study
The Procedure of the Experiment for the effect of the Flow Rate Study

  • We Injected mud into the core sample to damage the core and reduce the permeability.

  • After that we injected 15% wt acid about 0.3 of PV.

  • We injected water to displace the acid in the core and wait to become the pressure constant.

  • A constant flow rate of 2 cc/min for MC2 and 1 cc/min for CW2.



U nited a rab emirates u niversity c ollege of e ngineering

Control Panel Rate Study


U nited a rab emirates u niversity c ollege of e ngineering

Pump Rate Study

Core Holder



Effect of hcl concentration
Effect of HCL Concentration Rate Study

  • Q=1.0 cc/m


Effect of rock permeability1
Effect of Rock Permeability Rate Study

  • HCL concentration = 15% wt.

  • Q=1.0 cc/min


Effect 0f flow rate1
Effect 0f Flow Rate Rate Study

  • Concentration of HCL=15% wt




The procedure of the experiment
The Procedure of the Experiment Rate Study

  • Inject mud into the core sample to damage the core and reduce the permeability.

  • Calculate the pore volume of injected mud and the damage pressure.

  • Inject water to displace the acid in the core and wait to become the pressure constant.

  • Calculate the pore volume of injected acid amd the water and also the treated pressure.




Effect of the flow rate
Effect of the flow rate Rate Study

  • Pore volume of acid injected.

    MC2

    CW2

    AM1

PVI=0.3 * 3.238=0.9714

PVI=0.3 * 3.014=0.9042

PVI=0.3 * 3.002=0.9006


Core mc2
Core MC2 Rate Study

Mud Injection

Acid with Water Injection


Core cw2
Core CW2 Rate Study

Mud Injection

Acid with Water Injection


Core am1
Core AM1 Rate Study

Mud Injection

Acid with Water Injection


U nited a rab emirates u niversity c ollege of e ngineering

K Rate StudyD = (Ki– Kacid) / Kdamage


Effect of the rock permeability
Effect of the rock permeability Rate Study

  • Pore volume injected

    MC3

    MC4

    AM1

PVI=0.3*4.517=1.355

PVI=0.3*3.88=1.164

PVI=0.3 * 3.002=0.9006


Core am11
Core AM1 Rate Study

Mud Injection

Acid with Water Injection


Core mc4
Core MC4 Rate Study

Mud Injection

Acid with Water Injection


Core mc3
Core MC3 Rate Study

Mud Injection

Acid with Water Injection


U nited a rab emirates u niversity c ollege of e ngineering

K Rate StudyD = (Ki– Kacid) / Kdamage


Problems faced in our experiment
Problems faced in our experiment Rate Study

  • High over burden pressure needed.

  • When we stop our mud injected?