Introduction
By using the most advanced well testing technology and the latest equipment, CNLC Well Testing Services Division can provide well testing services and a full coverage of other downhole operation services both in open hole and cased hole. Our activities have ranged from remote desert to offshore platform.

Well Testing Services Division can provide:

• Drill-Stem Testing Services (DST) & NAVI Pump Service
• Surface Well Testing Services
• Wire Line/Slick Line Services
• Well Completion Services & Progressive Cavity Pump (PCP) Services
• Coiled Tubing (CT) services & Nitrogen Gas Services
• Well Workover Services
• Sand Control Services
• Water Plugging Services
• Stimulation Services (acidizing and fracturing)
• Specialized Services such as liquid level test by echo sounder, indicator test

• Max. tested well depth: 7,200 m(21946 ft)
• Max. tested open hole length: 1,800 m(5486ft)
• Max. tested formation pressure: 140 MPa(20,300psi)
• Max. tested formation temperature: 205.6 ℃(402℉)
• Max. tested wellhead pressure: 94 MPa(13,630psi)
• Max. tested wellhead temperature: 82.9 ℃(181,℉)
• Max. tested gas flowrate: 2.01 MMm3/d(71 MMSCFPD)
• Max. tested H2S concentration in gas: 150,000 ppm
• Max. tested CO2 concentration in gas: 75,410 ppm
• Max. production test duration: 125 days

Types of Well Test:

Deliverability Test (productivity test)
1. Back pressure test
       Steady-state test
       Systematic test
       Flow-after-flow test
2. Isochronal test
3. Modified isochronal test

Transient Test
1. Pressure draw down test
2. Reservoir limit test (RLT)
3. Pressure build-up test
4. Multi-rate test
5. Interference test
6. Vertical (interference) test
7. Pulse test
8. Tracer test