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


Hafit mountain carbonate rock

Hafit Mountain Carbonate Rock


Core samples

Core Samples

  • Cutting the big rock into small core sample.

  • Eight core sample.

  • The dimensions of these core sample.


Core samples cutter

Core Samples Cutter


Core samples1

Core Samples


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).


Vacuum pump

Vacuum Pump


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 calculation of the porosity

The Calculation of the Porosity


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.


Core laboratories

Core Laboratories


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

Pressure Control

Nitrogen Cylinder

Pressure Gauge

Overburden Pressure Pump


The permeability calculation

The Permeability Calculation


Core laboratories1

Core Laboratories


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


The result of the experiment

The Result of the Experiment


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.


The result of the experiment1

The Result of the Experiment


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.


Acid treatment unit

Acid Treatment Unit


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

Control Panel


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

Pump

Core Holder


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

Pressure Gauge & Valves


Effect of hcl concentration

Effect of HCL Concentration

  • Q=1.0 cc/m


Effect of rock permeability1

Effect of Rock Permeability

  • HCL concentration = 15% wt.

  • Q=1.0 cc/min


Effect 0f flow rate1

Effect 0f Flow Rate

  • Concentration of HCL=15% wt


The results of the experiment

The Results of the Experiment


Acid treatment unit1

Acid Treatment Unit


The procedure of the experiment

The Procedure of the Experiment

  • 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.


The damage permeability calculation

The Damage Permeability Calculation


The stimulated permeability calculation

The Stimulated Permeability Calculation


Effect of the flow rate

Effect of the flow rate

  • 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

Mud Injection

Acid with Water Injection


Core cw2

Core CW2

Mud Injection

Acid with Water Injection


Core am1

Core AM1

Mud Injection

Acid with Water Injection


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

KD = (Ki– Kacid) / Kdamage


Effect of the rock permeability

Effect of the rock permeability

  • 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

Mud Injection

Acid with Water Injection


Core mc4

Core MC4

Mud Injection

Acid with Water Injection


Core mc3

Core MC3

Mud Injection

Acid with Water Injection


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

KD = (Ki– Kacid) / Kdamage


Problems faced in our experiment

Problems faced in our experiment

  • High over burden pressure needed.

  • When we stop our mud injected?


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