Wireline Formation Testing and Interpretation

Description:

During the past sixteen years wireline formation testing (WFT) has emerged as one of the critical formation evaluation means in the upstream hydrocarbon exploration activities. Modern wireline testers (MDT, RCI, and RDT) have gradually but increasingly claimed some of the duties of conventional drill-stem test programs, as a result of high drilling cost, environmental protection, operational safety, and WFT technology advances. Discussions on the “WFT vs. DST/well test” topic have widely been held in a variety of professional and technical arenas, from pressure applications to fluid typing and sampling. This course is tailored to satisfy the interdisciplinary need of geologists, petrophysicists, and reservoir engineers, who have basic understanding of wireline testers, but have an increasing use of wireline testers or deal with WFT data and want to become more knowledgeable on this subject.  When the course ends, the participants are expected to apply the skills and lessons learned in designing better test programs, maximizing probabilities of getting quality tests, and benchmarking confidence levels to enhance results. The latest LWD formation testing technology and practice are also included in this course.

Goal:

To improve understanding and awareness of wireline formation testing and interpretation

Objectives:

By the end of this course, the participant will be able to:

  • Understand wireline formation testing technologies, applications, and limitations

  • Assemble wireline testing programs, tool configurations

  • QC pressure and fluid ID tests in the wellsite for the best quality data

  • Interpret pressure gradient data for in-situ fluid densities, fluid contact levels

  • Compare two gradient lines for reservoir connectivity/continuity

  • Perform error analysis and quantify uncertainties of P/D slopes and free water levels

  • Design and interpret pressure transient data for permeability

Outlines:

  • Wireline Formation Testers And Technologies
  • Measurement Principles; Test Types (Probe Pretest, Extended Flow With Probes And Dual Packers),
  • Drawdown Mobility And Its Significance
  • Data Quality Coding And Screening
  • Pressure Gradient Analysis Principles, Surface And Subsurface Fluid Density/Pressure Gradient, Error Analysis
  • Free Water Level Interpretation And Uncertainty Quantification
  • Gradient Line Comparisons For Single Well And Multiple Wells
  • Mud Filtration Phenomena (Wettability/Capillary Effect, Supercharging)
  • Fluid Identification And Sampling Principles And Procedures
  • Permeability Test And Interpretation From Short And Extended Flows
  • Testing Depleted Zones & Temperature Measurement
  • LWD Formation Testers
  • Test Program Design

Who Can Benefit?

Geologists, petrophysicists, wellsite supervisors, hydrodynamic specialists, reservoir engineers, geophysicists, and geodata interpretation technologists of multidisciplinary formation evaluation and development teams that are actively engaged in G&G operations for hydrocarbon discovery and reservoir management