FlairFlex. Real-time fluid logging and analysis service

Transcription

1 FlairFlex Real-time fluid logging and analysis service

2 FlairFlex Real-time fluid logging and analysis service The FlairFlex* service from Geoservices provides early insight into reservoir fluid properties and composition through at-surface quantification of C 1 C 6 and qualification of C 7 C 8. Applications Formation evaluation and reservoir characterization in all well and reservoir types Interwell and intrawell fluid facies mapping Optimization of completion programs Input for geosteering and well placement decisions

3 Benefits Optimizes formation testing, sampling, and downhole fluid analysis Characterizes reservoir fluid independently of drilling fluid, wellbore geometry, temperature, and pressure Provides zero-operational-risk formation evaluation Reduces rig time and cost Features PVT-analogous hydrocarbon composition log for C1 C 6 Measurement of C7 C 8 compounds, light aromatics, and nonhydrocarbons such as helium Proprietary calibration of extractor efficiency and correction from recycling and contamination Built-in quality control (QC) workflows Integration with other formation evaluation data sources Flexible deployment at wellsite and scalable interpretation support

4 Earlier insight from at-surface formation evaluation Get downhole data at surface By extracting hydrocarbons from drilling fluid returns at surface, the FlairFlex service provides fluid characterization and early insight into C 1 C 6 reservoir fluid composition before downhole sampling or well testing is possible. This unique wellsite service provides critical information regardless of logging conditions and does so with zero additional operational risk. Make informed investment decisions In exploration and appraisal campaigns, investment decisions often must be made with limited data. The FlairFlex service provides the first available formation evaluation information to improve critical infrastructure planning. Improve accuracy of hydrocarbon data The FlairFlex service continuously logs fluid data, which derisks and improves downhole sampling decisions. Integrating data from the FlairFlex service with data from other formation evaluation techniques provides a more robust and accurate picture of hydrocarbon in the formation. C n, mole % Pilot hole FlairFlex service PVT analysis C C C ic nc ic nc Sidetrack hole FlairFlex service The FlairFlex service quantified fluid composition in real time, and the results were later verified by PVT analysis.

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6 Service upgrades for improved reservoir characterization Calibrate extraction efficiency immediately The FlairFlex service equipment continuously samples drilling fluid from the flowline and from the pump suction line. Extraction occurs at controlled constant thermodynamic conditions and can now be calibrated with a fresh drilling fluid sample, rather than after drilling has commenced. Hydrocarbons are continuously extracted and analyzed, enabling immediate quantification of C 1 C 6 composition. Increase data integrity Processing of the acquired data includes synchronization of in and out data as well as filtering for drilling artifacts. The FlairFlex service features a virtually maintenance-free fluid extractor. Temperature regulation for extraction control has also been refined to increase precision. Integrate FlairFlex data with other data sources Geoservices experts use the Techlog* wellbore software platform to generate fluid facies logs and compositional analyses of various facies. These logs can be seamlessly integrated with other available formation evaluation data to enhance reservoir characterization. From daily quicklooks to more in-depth analyses such as multiwell studies, our data processing solutions help advance reservoir understanding. A Geoservices engineer prepares the FlairFlex service autocalibrator. Advance formation evaluation with 3D modeling In addition to traditional composition logs, the FlairFlex service can be integrated into models from Petrel* E&P software platform to provide advanced 3D visualization. This flexibility enables you to choose the appropriate level of service for your well.

7 C 3 nc 8 MCC 6 He Depth, m Shallow Resistivity 0.2 ohm.m 2,000 5 ppm 100,000 C 2 5 ppm 100,000 nc 4 nc 5 nc 7 C 7H 8 H 2 Gamma Ray Deep Resistivity C 1 ic 4 ic 5 nc 6 C 6H 6 CO 2 2,320 gapi ohm.m 2,000 5 ppm 100,000 2,330 2,340 2,350 2,360 2,370 2,380 Hydrocarbons extracted from the drilling fluid are continuously analyzed to provide quantitative and qualitative analysis of reservoir fluid.

8 Case Study: FlairFlex Service Reveals Thick Oil Zone Undetected by Basic LWD Measurements Offshore Malaysia Challenge Provide input for downhole sampling by determining fluid type in formation that was invaded by water-base mud (WBM). Solution Use the FlairFlex service from Geoservices to qualify reservoir fluid distribution while drilling. Results Identified an oil zone in real time with high confidence in an interval where basic LWD measurements were inconclusive. Optimized sampling program, enabling the operator to collect reservoir-representative samples from the gas and oil zones despite deep invasion. Provided PVT-analogous compositional analysis of oil sample.

9 Evaluate hydrocarbon zones in a formation with deep WBM invasion An operator was drilling a wildcat exploration well offshore Malaysia in a thickly stacked sandstone reservoir. The operator needed to acquire as much formation evaluation information as possible without exceeding the allotted budget. Accurate while-drilling formation evaluation would ensure potential pay zones are not overlooked and would subsequently help to optimize the wireline sampling program. Evaluate potential pay zone with the FlairFlex service Schlumberger suggested using the FlairFlex real-time fluid logging and analysis service to provide cost-effective and highly accurate formation evaluation information. The FlairFlex service quantifies hydrocarbons present in fluid returns at surface in real time, providing valuable downhole insight before downhole sampling or well testing operations are possible. This data adds confidence in reservoir evaluation interpretation and can be obtained independently from well conditions and with zero additional operational risk. Hydrocarbon composition, % FlairFlex service PVT analysis Real-time analysis from the FlairFlex service provided initial confirmation of an oil zone; PVT analysis showed strong agreement with the real-time fluid typing. FlairFlex Service PVT Analysis nc ic nc ic C C C

10 Case study (continued) Correctly identified gas and oil zones while drilling Using the FlairFlex service, the operator identified a thick hydrocarbon zone. Real-time analysis indicated that the zone contained a complex fluid distribution with intercalations of lighter and heavier hydrocarbons. Analysis from the FlairFlex service and LWD strongly agreed in identifying this interval as a gas zone. Below, a clear change was observed, and all gas ratios from the FlairFlex service indicated the presence of oil while LWD interpretation was inconclusive. The operator subsequently collected two downhole samples in the gas zone and one in the suspected oil zone. Analysis of the two shallower samples confirmed the fluid type. However, the fluid pumped from the suspected oil zone was identified as water, possibly WBM filtrate. Based on the FlairFlex service s analysis that suggested the presence of liquid hydrocarbon, the operator decided to reset the wireline formation tester and begin pumping at a higher flow rate. This allowed oil to break through, and high-quality samples were collected from that zone. Later PVT analysis results exhibited a remarkable match with the C 1 C 5 composition from the FlairFlex service. Without fluid typing from the FlairFlex service, the oil zone would likely have been overlooked.

11 At the first pumpout station, real-time downhole fluid analysis determined that only water, or possibly WBM, was pumped. However, the operator was confident in the fluid analysis from the FlairFlex service and agreed to set the wireline formation tester again to pump additional fluid. Oil breakthrough was observed and the pay was extended to this interval Flowline fl uid resistivity First Pumpout Station Hydrocarbon Water Highly absorbing fl uid fl ag Resistivity, ohm.m ,000 1,500 2,000 2,500 3,000 3,500 Elapsed time, s Second Pumpout Station (Same Depth) Hydrocarbon Water Highly absorbing fl uid fl ag CO 2 C 1 C 2 C 3 C 5 C ,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 12,000 13,000 Elapsed time, s

12 FlairFlex Find out more at slb.com/flairflex. Critical formation evaluation information when you need it most. slb.com/flairflex *Mark of Schlumberger Other company, product, and service names are the properties of their respective owners. Copyright 2015 Schlumberger. All rights reserved. 15-GS-35913