Case Study #1
During casing operations for 9-5/8” deployment, the objective was to isolate the water sensitive Wasia and Biyadh shales and close off the lost circulation zones across the Shu’aiba formation.
Customer Challenge
- Key Challenges of the Various Zone Formations:
- Safaniya Formation: Caving’s & Water Influx
- Lower Aruma: Shales
- Wasia & Biyadh (Water Sensitive): Bit Balling
- Shuaiba: Loss Circulation Zones
VES Performance
- Previous Casing Shoe Depth (13-3/8”): 4225’ 9-5/8” Total Depth: 6780’
- Length Drilled conventionally: 1773’ (till 5998’)
- Length Drilled by CwD: 782’ (till 6780’) 12-15 BPM
- VES Equipment utilized: 9.625”, 43.5 PPF, BTC, L80 Float Collars (2 Each)
- Float Equipment Operation: 60 Hours
- (Pick up CwD to displace first stage cement)
Case Study #2
During casing operations for 13-3/8” deployment, the objective was to sut off the lost circulation in the ARUMA and WASIA formations and prevent the WASIA formation from charging the upper formations / isolate the water sensitive WASIA shales.
Key Challenges of the Various Zone Formations:
- Aruma: Loss Circulation Zones
- Aruma & Wasia: Tight spots / Stuck Pipe
VES Performance
- Previous Casing Shoe Depth (18-5/8”): 75’ 13-3/8”
- Total Depth: 1764’
- Length Drilled conventionally: 875’ (till 950’) (had complete losses at 140’).
- Length Drilled by CWD: 814’ (till 1764’) =<19 BPM
- VES Equipment utilized: 13.375”, 68 PPF, BTC, J55 Float Collars (2 Each)
- Float Equipment Operation: 32 Hours (Pick up CWD to displacing first stage Cement)
