Investigation of Non-Newtonian nonofluids and effect to improve the Drilling Fluid Properties,present by hamed motlagh

1. By: Hamed Motlagh (Msc candidate)
Master by: Dr.Raeis zadeh
Present to IAU-SH-spring 1395-(21-may-2016)
IN THE NAME OF THE GOD
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2. Fluid flow chart
Fluids
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3. Fluid rehologic curve
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(Casson plastic)
(Pseudoplastic or power law)
(Dialtant)
(Deformation rate)
t
n






dy
du
Plastic

4. Non-Newtonian Fluids
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Newtonian Fluid :
dy
du
t 
Non-Newtonian Fluid : )
dy
du
η(τ 
η is the apparent viscosity and is not constant for
non-Newtonian fluids.

5. Model Fitting - Shear Stress vs. Shear Rate
t h g
t g
t g
t t h g
t t h g
t t g

 <
 >
 +
 +
 +



K
K
K
n
n
y
n
c
y
n
n
n
( )
( )
1
1
1
2
0
Newtonian
Pseudoplastic
Dilatant
Bingham
Casson
Herschel-Bulkley
Summary of Viscosity Models



1
2
1
2
1
2
t or = shear stress, gº = shear rate, a or h = apparent viscosity
m or K or K'= consistency index, n or n'= flow behavior index

6. 1. Subsurface pressure control
2. Cuttings removal and transport
3. Suspension of solid particles
4. Sealing of permeable formations
5. Stabilizing the wellbore
6. Preventing formation damage
7. Cooling and lubricating the bit and drill string
8. Transmitting hydraulic horsepower to the bit
9. Facilitating the collection of formation data
10. Partial support of drill string and casing weights
11. Controlling corrosion
12. Assisting in cementing and completion and logging operation
13.Assist to minimize of torque,drag, sticking pipe
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Principal Functions of Drilling Fluids

7. Drilling mud circulation system
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8. Fluid Types
 The Bingham Plastic model has been used most often to describe the
flow characteristics of drilling fluids. It is one of the older rheological
models currently in use. This model describes a fluid in which a finite
force is required to initiate flow (yield point) and which then exhibits a
constant viscosity with increasing shear rate (plastic viscosity).
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9. Bingham Plastic Fluids
 The two-speed viscometer was designed to measure the Bingham
Plastic rheological values for yield point and plastic viscosity. A flow
curve for a typical drilling fluid taken on the two-speed Fann VG meter
is illustrated in Figure below. The slope of the straight line portion of
this
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10. Calculation of Bingham Plastic Fluids
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11. Measurment equipment
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fann viscometer (V.G. meter
Marsh funnel (apparent
visco meter) qrt/sec

12. Nano fluid in the drilling mud
 Nanofluids are a relatively new class of fluids which consist of a base
fluid with nano-sized particles (1–100 nm) suspended within them
Nanofluids possess the following advantages :
 High dispersion stability
 Reduced pumping power
 Reduced particle clogging
 Adjustable properties
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13. Effect on the Thermal conductivity
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14. Nano particles
Nano wires
Carbon nano tubes
Thin films

15. Nano base mud
 Nano- base drilling fluid , the fluid that at least one Nano additive particle size 100-1
nanometers Is . The ultimate goal of nanomaterials used in drilling mud , reduce costs
through reduction of the overall goals Materials and content drilling mud and mud
properties
 Fluid loss control-wellbore stability
 Bit balling preventing
 Reduce of torque and drag force
 Removable of H2S with nano ZnO (nano zinc oxide) ZnO + H2S ZnS +H2O
 Cementing operation
 Improve to HPHT condition with nano composite
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16. nano metal oxides (TiO2, Al2O3 and CuO)
 Reduction in Filtrate
 Reduction in Mud Cake Thickness
 High yield point, plastic viscosity and gel strength
CuO-ZnO nanofluids
 Increase thermal conductivity  ability of the mud to cool faster
 Increase electrical conductivity  to prevent the degradation of and maintain the viscosity
ZrO2 nanofluids
 wettability modifiers for carbonate rocks
Drilling fluids with nano size polymer additives filtrate with enhanced oil recovery
properties
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17. Increased pressure drop and pumping power
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18. Nanofluids thermal performance in turbulent flow and fully
developed region
 Higher viscosity
 Lower specific heat
 Thermal conductivity
 High cost of nanofluids
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19. Thank you for
attention
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