Exploring for Stratigraphic Traps Using Multi-well Pressure/Depth Plots and Salinities

Exploring for stratigraphic traps is the subject of a short course taught at AAPG’s Summer Education Conference in Fort Worth. The format of this course, which will be held on June 21 & 22, is such that students learn by hands on class projects in a step by step fashion where they start with screening raw data & finish off with completed Plots & maps. In all cases students are given the limited data prior to discovery of a pool & then “discover” the pool with interpreted plots & maps. They then have to assess how big the find is from the discovery well pressure data. The instructor, Hugh Reid, is currently a consultant at Hugh W. Reid & Associates in Calgary and is best known for his popular DST Interpretation courses, which have been presented worldwide to over 200 companies in more than 17 countries, over the past 26 years.

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

  • Screen sources of field pressure data to select valid reliable stable Formation pressures to plot.
  • Use pressure vs. depth plots to correlate reservoirs (Are zones separate or continuous?).
  • Predict depth of gas/oil/water contacts downdip from wells of interest or discovery wells.
  • Make reservoir continuity maps based on the Pressure information to show areal extent of traps & reveal the areas of best permeability from the pressure contour spacing.
  • Avoid less prospective areas which may be flushed by updip water flow or are depleted by close-by production.
  • Reveal more favorable areas where downdip flow water preserves oil pools with weak barriers.
  • Assess trap holding capacities of seals particularly Unconformity traps by knowing pressures of the reservoirs above & below subcrops edge.
  • Identify “Central Basin Gas” type areas of continuous gas phase continuity- resource plays from the pressure signature.

For more information about the course, please visit the website:


The course, which is a part of the Summer Education Conference, will benefit geologists who are involved in looking for permeability barriers and subtle traps missed by others in well-drilled basins or those looking for potential stratigraphic traps in unfamiliar overseas basins. Also aids those struggling with subtle correlations of sands with similar log signature. No prior knowledge of the subject is necessary.

If you have any questions, please email educate@aapg.org

Last 5 posts by Susan Nash

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