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FRACSEAL ® . An inexpensive product to: Improve Production Reduce Drilling Time. WELLBORE INSTABILITY. The presence of microfractures is now recognized as a common cause of severe wellbore instability, particularly in ultra-low permeability rocks such as shales and some limestones .

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Presentation Transcript
fracseal
FRACSEAL®

An inexpensive product to:

Improve Production

Reduce Drilling Time

wellbore instability

WELLBORE INSTABILITY

The presence of microfractures is now

recognized as a common cause of

severe wellbore instability, particularly

in ultra-low permeability rocks such as

shales and some limestones.

to establish an effective flow barrier that stop or minimise fluid invasion into microfractures
To establish an effective flow barrier that stop or minimise fluid invasion into microfractures
  • An additive must be present in the mud system at all times so that microfractures are contacted immediately the drill bit exposes to them.
  • They will not be effective if used as a pill treatment to stabilize a formation that has already begin to fail.
interbedded shale and carbonate
Interbedded Shale and Carbonate

Shale

High Porosity Carbonate

pore characteristics of api filter paper and high porosity formation
Pore Characteristics of API Filter Paper andHigh Porosity Formation

Unconsolidated Sand

Carbonate

API Filter Paper

Sand Stone

Microscopic Image 100 Mag.

fracseal developed based on 20 40 gravelpack sand porosity
FRACSEAL® Developed Based on 20/40 Gravelpack Sand Porosity

Unconsolidated Sand

Carbonate

20/40 Gravelpack Sand

Sand Stone

Microscopic Image 100 Mag.

unconsolidated sand formation affected by drilling mud
Unconsolidated Sand Formation Affected by Drilling Mud

WITH Flow barrier

Without flow barrier

Minimum Drilling Mud Infiltration

Drilling Mud Infiltration

Drilling Mud with FRACSEAL

Drilling Mud

Unconsolidated Sand Formation

Unconsolidated Sand Formation

FRACSEAL Filter cake

drilling mud without effective flow barrier permeable filtercake
Drilling Mud Without Effective Flow Barrier ( Permeable Filtercake )

Permeable Filtercake

20/40 Gravelpack Sand

drilling mud with effective flow barrier fracseal
Drilling Mud With Effective Flow Barrier ( Fracseal )

Fracseal Filtercake

20/40 Gravelpack Sand

filtercake comparison test
Filtercake Comparison Test

Fracseal

Mica and Nutplug

Tough and Impermeable Filtercake

Soft and Permeable Filtercake

No Penetration of Fine Solid

Penetration of Fine Solid

20/40 Gravelpack Sand

20/40 Gravelpack Sand

slide11

FRACSEAL Filtercake

at Ambient Temperature

Solid Particles Trap by Fracseal

CSIRO Perth

slide12

FRACSEAL Filtercake

After 24 Hours Hot Rolling at 350 F

Trapped Fine Solids by FRACSEAL Fitercake

CSIRO Perth

slide13

Pore Characteristics of Common LCM

WALLNUT Medium

MICA Medium

GRAPHITE Medium

MARBLE Medium

Microscopic Image 100 Mag.

slide14

Temperature Resistance Test of FRACSEAL

For 24 Hours at 350O F

Before

After

Microscopic Image 40 Mag.

Microscopic Image 40 Mag.

Microscopic Image 400 Mag.

Microscopic Image 400 Mag.

CSIRO Perth

100psi pressure test oil base mud
100psi Pressure TestOil Base Mud

Oil Base Mud + Fracseal

Oil Base Mud

benefits of fracseal
Benefits of FRACSEAL®
  • Increased production
  • Better hole stability
    • Unconsolidated Sand
    • Shales
    • Coal
    • Gumbo
  • Reduced torque and drag
  • Reduced potential for differential sticking
  • Reduced seepage loss
  • Reduced whole mud loss
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