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Example-2: Well Completion Optimization

- No of frac's per well?
- Type of frac's (acid versus proppant).
- Size of a fracture (length, width and height)
- Modeling the fracture profile (perhaps less sensitive in a confined environment).

Example: No. of Frac’s Per Well

Initial Res. Press: 4,750 psi
Reservoir Temp: 180 F
OIP: 28.50 Million STB
Frac Half length: 300 ft
Frac Width: 0.34 inches-Ca. 4 Lb/ft²

Model prod. For a HAW with 2,4 and 6 fracs

Layers Properties Input

Tops Thickness Buttoms Kh Kv Por

(ft) (ft) (ft) (mD) (mD) Dec

9382.5 9.8425 9392.343 1 0.3 0.4

9392.343 9.8425 9402.185 1 0.3 0.4

9402.185 9.8425 9412.028 1 0.3 0.4

9412.028 9.8425 9421.87 1 0.3 0.4

9421.87 9.8425 9431.713 1 0.3 0.4

9431.713 9.8425 9441.555 1 0.3 0.4

9441.555 5 9446.555 1 0.3 0.4

PVT Table for Oil and Gas

Press	Rs	Bo	Zg	Oil Vis	Gas Vis
(psi)	(SCF/bbl)	(rs.bbl/STB)		(cP)	(cP)
162.4	25.9	1.0576	0.96886	1.326	0.0119
984.8	253	1.1922	0.81973	0.972	0.0141
1647.8	421.4	1.2774	0.74308	0.761	0.01783
2419.2	623.7	1.3736	0.70406	0.55	0.02289
3089.3	818.8	1.4645	0.73305	0.381	0.02714
3350	902.5	1.5036	0.74972	0.3	0.02875
3495.4	950	1.52	0.76396	0.299	0.02957
3792.7	1023	1.552	0.79309	0.298	0.03123
4068.3	1108	1.586	0.82009	0.297	0.06278
10014.7	3091.123	2.52662	1.50152	0.21	0.05716

Beta Factor (1/ft)

Top Structure with all three models

Output from all three Models

Comparison of a Proppant and acid fracturing

Proppant, usually longer frac's Ca. Half-length of 300 ft. However finite conductivity with high non Darcy effects.

Acid, usually short frac;s ca. 50 ft half length. However, with infinite conductivity non-Darcy effects are negligible

Results

Conclusions >>

3.198242E-02