Drilling DesignCapstone project semester 2

PNGE 491 – team 26

December 21, 2014

Reservoir Recap

OOIP 375 – 675 MMSTB

Estimated recoverable amount 150 - 270 MMSTB

Carbonate Reservoir with heavy oil

Limestone/Dolomite Reservoir

Drill through Limestone/Shale

Drilling Location

Horizontal Section perpendicular to fault

Red dot indicates heel with toe towards fault

Target Zone

• Net pay average 29’• Set target depth at TVD-2273’• Reports of fluid circulation

around 1600’ from other wells

Considerations throughout

1) Technical Performance

2) Cost

3) Safety Factor

4) Environmental Impact

Pressure Window After our target zone had been selected we then

had to plan on our drilling fluids and weight. Doing so we analyzed our sonic logs to create our pressure window. For pore pressure we assumed 0.465 psi/ft.

Mud Design

9.6 lb/gal density Fresh water with granular

bentonite450 bbl of mud on location.

Cement design

Use standard 16 lb/gal cement

5% silica fume to guarantee strength

10% fly ash to increase workability

0% free water content present

183 bbl of cement or 123 Mlbs

Density should not have a difference exceeding 0.5 lb/gal throughout mixture.

Casing design

Horizontal well with open hole style completion.

Suitable for production and injection purposes.

1. 16” conductor (65 lb/ft H-40) 0’-60’

2. 10.75” Surface Casing (32.75 lb/ft H-40) MD 0’-1700’

3. 8.625” Intermediate Casing (28 lb/ft H-40) MD 0’-2600’

4. 6.5” Open Hole Lateral MD 2600’-5900’

Drill bit program Designed simultaneously with casing

Roller-cone style bits to maximize ft/hr penetration.

Steel teeth with sealed bearing best for lithology.

1. 14.75” bit 60’-1700’

2. 9.5” bit 1700’-2600’

3. 6.5” bit 2600’-5900’

Well Schematic

KOP @ 1700'

2600' MD

2273' TVD

9.5" Hole

8.625" Intermediate Casing

6.5" Open Hole to 5900'

60'

20" Hole

16" Conductor

1700'

14.75" Hole

10.75" Surface Casing

Final Price

As our AFE reported our well will have a final cost of approximately $1,050,000 dollars.

Infrastructure pricing to access the well was not taken into consideration.

References

Perrin, D., Caron, M. and Gaillot, G. (1999). Well completion and servicing. 1st ed. Paris: Technip.

Prentice, C. and others, (1970). " Maximum Load" Casing Design. Journal of Petroleum Technology, 22(07), pp.805--811.

Ronaldo, V., Cem, S., Turgay, E. and others, (2003). Horizontal well design optimization: a study of the parameters affecting the productivity and flux distribution of a horizontal well.

Halliburton RedBook Engineering Tables. April 15,1999. Halliburton Company.