Digital Intelligent Artificial Lift. Technology Application Justification Operation

Transcription

1 Digital Intelligent Artificial Lift Technology Application Justification Operation 1

2 Gas Lift Production Optimization is Difficult Is my well completely unloaded? Is the well multi-point injecting? What is my lift depth? Am I optimized on gas lift? Can I lift deeper? Is my wellbore hydraulic model a good match to actual well performance? How much will I have to intervene? Do I have enough gas? What should be my lifting life-cycle? 2

3 Legacy Technology Challenges Narrow Operating Window. Design safety margins. Injection depth limited. Difficult to assess lift effectiveness. Intervention to optimize. Sensitive to well dynamics. Multi-point injection. Valve Chatter 3

4 Technology & Application Overcome limitations of existing gas-lift technology Improve life-of-well production economics 4

5 Digital Intelligent Artificial Lift - DIAL Features Variable orifice size at any depth Deeper injection No deviation limitation No well intervention Pressure and temperature data Remote monitoring and control Intelligent field-wide management Benefits Eliminate intervention Reduce OPEX Mitigate instabilities Enhance recoveries Optimize production Reduce HSE risk 5

6 Product Specification Multiple units per well. Controlled by a single ¼ TEC and SCS. 6,000psi Collapse rated Pressure. 10,000psi Burst rated Pressure. 2-7/8, 3.5 and 4.5 tubing configurations. Electrical Connection Metal-to-Metal Seal Actuator Housing Binary Actuator Systems Annulus and Tubing Sensors 125 C Max. rated Temperature. Binary Actuation, real time gas injection rate. Max. choked Flow Rate 6MMscfD. Fully MR0175 / ISO compliant. Electron Beam Welded construction. Electronics Housing Downhole Control System (DHCS) Valve Housing 6 x Gas Injection Valves and Orifices 6

7 Actuator and Valve Technology Actuated Valve Bellows Actuator Orifice Venturi option Reverse Flow Check Valve 7

8 Operating Envelope - Performance Comparison All 6 valves open Typical standard gas lift valve Silverwell Operating Window 1 valve open 8

9 2-7/8 & 3-1/2 slimline DIAL Top Mandrel / Body Electronics & Sensing Module Actuator Housings (Up to 3 valves per unit ) Upper Electrical Connection Lower Electrical Connection Bottom

10 Efficient Production Optimization DIAL User Interface 10

11 Justification & Operation Enhance life-of-well business case Field proven technology 11

12 Comparative Performance Testing Improved lift performance throughout well life in the Permian single well In all three reservoir pressure cases, the Silverwell DIAL installation yields a higher production rate through deeper injection. DIAL technology eliminates multipoint injection. DIAL remote control technology enables Gas Assisted Plunger Lift (GAPL) in late life. BOPD Barrells Oil per Day Early Mid Late Elapsed Time (Years) Silverwell IPO/Conventional IPO Silverwell Added Value Year Water Cut Reservoir P (Psi) TBFD BOPD TBFD BOPD % BOPD Early life 50% % 59 Mid life 60% % 83 Late life 80% % 17 12

13 Single Well - Early-life Performance Comparison Deeper injection More production No multi-pointing Less stations Silverwell Gas Lifting from DIAL unit at 8056 MD Station 6. Production Rate = 833 BFD The well is injecting as deep as possible, with the 1100 Psi compressor discharge at surface. The predicted production rate is 834 BFD, 417 BOPD, 50% water cut, injecting 610 MCFD. The port size at the operating valve can be changed from the surface to further optimize the gas lift rate. IPO Gas Lifting from 11 th IPO at 6827 MD. Production Rate = 718 BFD The well is multi-pointing as 4 IPO valves are open, and capable of passing gas. Casing pressure can be reduced to attempt to close the upper valves, but, production rate drops with less gas injected injection will transfer to an upper valve. 13

14 Benefits Observed from DIAL gas lift wells 15% Oil Gain Mitigating Instability 25% Gas Savings 14

15 Case History 1 Well Optimization Through downhole gauge measurement, the operator recognised the opportunity to increase gas injection rate from 400 to 500MCFD. Silverwell DIAL valves were opened, decreasing casing pressure. Net Oil Production increased 10% from 217 to 239BOPD. 15

16 Case History 2 Mitigating Instability 8/64 th orifice size causing multi-point injection and well instability. Upper IPO valve continuously opening and closing. Operator increased the port size to 10/64 by opening an additional valve. Well stability achieved. Valve closed to replicate issue and confirm the DIAL action. 16

17 Case History 3 Gas Management Through downhole gauge measurement, the operator recognised the opportunity to reduce the gas injection rate. The valve combination was changed from 18/64 to 12/64ths. The operator increased casing pressure and increased Net Oil Production by 18%. 17

18 Gas Lift Optimization From Months to Minutes Collect Report Model Review Act GL System & well test data collated Prod. Eng. reviews reports Prod. Eng. model data and analyze Prod. Eng. make decision Ops make changes to GL System DIAL-It-In Continuous Process 18

19 Eliminate production uncertainty, instabilities and operational costs with continuous, intervention-free, artificially lifted well optimization. More production Accelerating return-on-investment increased well production from enhanced lift efficiency Less intervention Reducing opex & risk reduced well down-time from intervention-free operation More data Informing production optimization increased insight from multiple in-well sensors Less uncertainty Enabling management decisions reduced misunderstanding from integrated gas lift system 19

20 Qualification Timeline Qualification & test summary for DIAL gas lift optimization system 2010 Flowloop test at Shell Rijswijk Electromagnetic compatability testing of DIAL system 2013 Material abrasion & erosion testing at National Physics Laboratory PDO pilot installation in Oman Sour gas exposure testing at TWI Bellows fatigue testing (sour gas & air) at TWI Seal explosive gas cyclic testing at Element DIAL transport vibration testing at Alphatec 2015 Coated check-valve erosion testing at IRIS Bellows explosive gas cyclic testing at Element Metal seal gas cyclic testing at BHR Group E-Beam HP gas cyclic testing at BHR Group 2016 Actuator gas functionality testing at Vaseco 125 deg C PCB HALT at Alphatec PTTEP pilot installation in Thailand Ingress Protection (IP) testing of Surface Control Systems at Alphatec 2014 Magnet assembly FEA & shear strength testing at TWI HPHT static gas seal testing at Eelement Seal explosive gas cyclic testing at Element DIAL HALT at Alphatec DIAL & actuator gas functionality testing at Vaseco Bellows explosive gas cyclic testing at Eelement DIAL flow testing at SWRI 2017 Uncoated check valve erosion testing at BHR Group Tatweer pilot installation in Bahrain. 20

21 Thank you! Questions? 21