Outline Pore Pressure and Fracture Gradient Drilling Fluid Casing Design Cement Design Drilling Bit Economic Analysis.

OutlinePore Pressure and Fracture Gradient

Drilling Fluid

Casing Design

Cement Design

Drilling Bit

Economic Analysis

Area of Interest

Area of Interest

Area of Interest

Area of Interest

OGIP Surface Map

Porosity Surface Map

Porosity 3D View

Net Pay 3D View

Vertical Well Placement

Horizontal Well Placement

Future Production Estimate

Fracturing Well #1

Pore Pressure and Fracture Gradient

Equation used

Pff = 0.33 x [(σOB / d) + 2 x (σpore / d)]

Pore Pressure Gradient

Approximately 0.42 psi/ft

Fracture Gradient

Approximately 0.73 psi/ft

Casing DesignAPI GRADE Yield Strength Min Ultimate Strength Min Elongation

J-55 40K (min) – 80K (max) [psi] 60K psi 29.5%

[Table 7.1 from text]

Based off of the calculated yield strength: around 42,000 psi

No need for larger ultimate strength

Water Table between 500 – 2000 foot (From NE)

Conductor Casing: 50 feet

Surface Casing: 2200 feet

Intermediate Casing: 6000 feet

Production Casing: 12000 feet

50

2200

6000

12000

Casing Design cont’d Casing Diameter Casing Pressure

Conductor 23.125 in 20 in 35 psi

Surface 19.2 in 14 in 1100 psi

Intermediate 13.5 in 11.25 in 2460 psi

Production 9.4 in 8.4 in 4850 psi

• SF = 1.7

Casing Design cont’d Casing Collapse Res.

Conductor 480 psi

Surface 1875 psi

Intermediate 5500 psi

Production 10200 psi

MW = Pressure x (0.052 x TVD)

Drilling Fluid Casing Mud Weight

Conductor 13.4 ppg

Surface 8.76 ppg

Intermediate 7.58 ppg

Production 6.16 ppg

MW = Pressure x (0.052 x TVD)

Cement DesignType: Class C

High early strength properties which allows cement to be used at high water levels.

Regularly used for shallow well cementing operations through salt beds.

Density of the cement = 11.53 ppg

Cement Design cont’dAc = ( dout

2 – din

2) / 1029.4 (bbl/ft)

Volume = Ac (bbl/ft) * Depth (ft)

Casing Cement Volume

Conductor 6.5 bbl 36.498 ft3

Surface 368.9 bbl 2071.37 ft3

Intermediate 324.58 bbl 1822.52 ft3

Production 207.49 bbl 1165.07 ft3

Total cement Volume 907.47 bbl 5095.44 ft3

Drilling BitDrilling through shale and sandstone

We will use Poly diamond crystal bit (because they are faster and tend not to break as often as other bits)

Use multi pad drilling (Will use 75% less land)

DrillingHow many days to reach depth?

It will take about 14 and half days to drill to the pay zone with an average rate of penetration of 34.3 ft/hr

How much will it cost per day?

rule-of-thumb for trip-time estimations is 1 hr/1,000 ft of a well.

C= [(R=$1125)( (t=12 hrs) +(td=350hrs)+Cb

$25,000]/(F=12,000ft) = $36.02/ft

$29,652.35

How much will it cost total to drill?

$432,331.27

Economical Analysis

Thank You!

Any Questions?