Formation testing and sampling tools with wireline (WFT) and formation pressures and sampling while-drilling (FPWD/FSWD) are widely used in exploration/appraisal and field development projects. During the past two decades, WFTs, such as MDT, RCI, and RDT, have emerged as one of the critical formation evaluation means in the upstream hydrocarbon exploration activities in high cost/risk and high reward drilling environments. In recent years technologies with FPWD/FSWD tools, such as TestTrak, GeoTape and Stethoscope, provide alternatives of formation testing in forms of earlier timing, flexible operational conveyance sequences in complicated wellbore entry into reservoirs. WFT and FPWD pressure data are acquired for predicting the hydrocarbon resource prospect & pool nature and key development uncertainties. Fluid samples are equally irreplaceable in exploration and appraisal project renewal and forward. This course is designed to satisfy the interdisciplinary need of geologists, petrophysicists, and reservoir engineers, who have an increasing use of wireline/LWD testing and sampling data. Practical class exercises are worked during the course. When the course ends, the participants are expected to apply the learned skills and tricks in designing test programs, maximizing chances of getting good quality tests, and benchmarking the confidence level of interpretation.
Geologists, geophysicists, petrophysicists, wellsite supervisors, reservoir engineers, and geodata interpretation technologists of multidisciplinary formation evaluation and development teams that are actively engaged in G&G operations from explorations, delineations and appraisals, to field development and reservoir management.
You will Learn:
Participants will learn how to:
- Apply wireline formation testing and sampling: technologies, applications, and limitations
- Understand how formation testers work; how to configure tool strings and design and plan a test program
- Perform QA/QC pressures and sampling data in real-time
- Interpret pressure gradient data for in-situ fluid densities, fluid contact levels
- Understand reservoir connectivity/continuity and compartmentalization
- Quantify uncertainties of pressure data interpretation results at various confidence levels
- Interpret graphical techniques (scatterplot, excess pressures, normalization)
- Design and interpret pressure transient data for permeability
- Perform comparisons between DST and WFT: values, information and
Course Content:
- Why formation testing and sampling in exploration, appraisals, development wells
- How WFT/FPWD/FSWD tools work; Measurement fundamentals; Test types (pretest, extended flow, and packer test); Drawdown mobility applications; Data QA/QC; Factors that influence pressure data quality
- Fundamental pressure gradient and FWL interpretation principles
- Graphical interpretation techniques: scatter-plot for gradient QC, FWL and compositional gradient detection; excess pressure plot for compartmentalization studies; normalization plot for depleted reservoir
- Multiple well data and multiple pressure trends for reservoir compartmentalization, continuity and extent
- Qualification and quantification of data interpretation uncertainties
- Mud filtration phenomena & near wellbore petrophysics; Mud slumping; Supercharging; Wettability/capillary effect
- Downhole fluid ID: optical property measurement and contamination control; Sampling principles and fluid sample quality assurance procedures; In-Situ fluid property measurement and reliability
- Permeability test design and data interpretation
- Test program design; Class exercises
