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Gas Lift Diagnostics A New Approach. Daniel Lucas-Clements Baker Jardine. Introduction. Baker Jardine Update PIPESIM Update Gas Lift Diagnostic Gas Lift Diagnostics in Context. PIPESIM / Baker Jardine Update. Baker Jardine acquired by Schlumberger April 2001
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Gas Lift Diagnostics A New Approach Daniel Lucas-Clements Baker Jardine
Introduction • Baker Jardine Update • PIPESIM Update • Gas Lift Diagnostic • Gas Lift Diagnostics in Context
PIPESIM / Baker Jardine Update • Baker Jardine acquired by Schlumberger April 2001 • Continue to Focus on PIPESIM Suite and ProdMan • Plus Integration with SLB Products e.g. Eclipse, OFM, Finder… • PIPESIM2000 launched. • Development project to rewrite program interface. • Integration under one user interface.
Network Analysis • Production Network Modeling Pipeline & Facilities Analysis Well Performance Analysis • Detailed Pipeline Studies • Inflow Modeling, Nodal Analysis Production Optimization Field Planning • System Optimization & Constraint Management • Reservoir & Surface Facility Integration Multilateral Well Simulator • Horizontal & Multilateral Well Models What is PIPESIM 2000 Total System Integration
Field Planning Tool • Allows PIPESIM 2000 Well / Network models to be linked with detailed reservoir descriptions • Built-in models: Look-up tables, Blackoil / Compositional Material balance models • Reservoir models: Eclipse 100 / 300 and others • Allows time-stepping of the coupled model through field life • Includes field planning events controlled via an easy to use graphical user interface • Time based events • Conditional events
Gas Lift Diagnostics • What is happening down hole? Is my well working correctly? Can my well be more efficient? • What data do I have? • What do I need to correct the problem? • Can I correct the problem without intervention? • Do I need to collect further data? • Can I justify the chosen course of action?
Traditional Approach • Analyse well by well – No targeting • Analyse well when new data available • Mostly analyse after Flowing P&T survey • Occasionally analyse with new well test • First analysis leads to more data gathering • Initiates use of chart recorders • Cycle times on well optimisations can be long
Production Challenges • The Challenge • Better surveillance • Faster problem diagnosis • Optimum production operations • The Method • Data management • Apply simulation
ProdMan Features • Data Management • Well tests, field data, SCADA & DCS data • Automated collection • Presentation and trending to operators • Simulation • Conversion of data into information with PIPESIM 2000 • Automated • Surveillance • Diagnostics • Constraint Management • Real-Time Optimization
ProdMan Data Flows DataData Collection Presentation & Analysis => Information to Operators Field Data Production Database ProdMan Well Test Data SCADA Database Production System Models (PIPESIM Suite) SCADA/DCS
What’s Changing? • Field Automation • Real time data on Engineers Desk • Cheaper controls for continuous control • People Issues • Fewer operational staff • Monitoring more information • Tend to be “Fire fighting”
Typical Well DCS System Interface DCS/ SCADA System Set Point T P P F T P P CH
ProdMan Gas Lift Diagnostic • Determine the status of each gas lift valve and how much gas is being passed • Automatic data retrieval • Batch processing to screen large numbers of wells • Analysis capability to diagnose individual wells
Gas Lift Diagnostic • Design Philosophy • Use simulation to determine information • Use real-time and offline data • Design system to short list potential problem wells • Allows large numbers of wells to be monitored • Use available data • Increase in data provides enhanced diagnostic
Batch Processing • Focus on Wells with Problems
Results stored to database Builds history for well Reporting module Long term
ProdMan Gas Lift Diagnostic One Part of ProdMan
ProdMan Focus • Production Surveillance • Calculating unmeasured variables • Comparing measured to calculated values • Production Diagnostics • Well test analysis • On-line Gas Lift Diagnostics • Production Optimization • Field wide production optimization • Reacting to hourly changes in equipment availability
ProdMan Structure DB PRODMAN DB PIPESIM LAN Suite FIELD DATA MANAGER Applications (ADO,DAO,ODBC,API's) SCADA 1 WAN Functional Modules SCADA 2 MODULE MODULE MODULE ACTIVE X ACTIVE X ACTIVE X COMPONENT COMPONENT COMPONENT TEXT/ Third Party EXCEL Applications MODULE MODULE MODULE ACTIVE X ACTIVE X ACTIVE X COMPONENT COMPONENT COMPONENT PRODMAN DB
Other Gas Lift Based Modules • Validation of well tests • Well Performance Analysis Module • Field Wide gas lift optimisation • Constraint calculation • Dual String optimization • Retrieval / Return of data to control system
Related Modules • ESP Diagnostic • Data Processing • Process Material Balance • Production Allocation • Long term monitoring • Inflow Performance
Conclusions • Automation is multiplying data availability • Analysis must capture value in data • Tools should focus on presenting - • The problems wells • The complete picture to understand the problem • The Challenge – Are you making the most of your data?