WHO SHOULD ATTEND

This course is aimed at reservoir, petroleum and exploitation engineers/technologists, geophysicists, and geologists who are involved in the field development and exploitation.

COURSE OBJECTIVES

This course will show geologists and engineers how to use pressure data from DSTs, production tests and wireline tests (MDTs, RFTs etc.) to make pressure depth plots which reveal permeability barriers such as pinch outs, sealing faults and any interruption to reservoir continuity, which can trap hydrocarbons. It will also demonstrate how pressures can be used to verify correlations to determine if sands are separate.

Hands on experience will be provided by 3 class projects to find traps using data before each pool was discovered. Students then assess how big the pool is using the discovery well pressure data.

COURSE OUTLINES

   
• Introduction and history of use of pressure data in exploration

   
• Sources of pressure and salinity data:- DST's - Drillstem Tests, Production Tests, MDT's, RFT's - Wireline Tests


• Screening the data


    
• How to obtain valid stable pressures from the data
    
• How to distinguish mud filtrate from true formation water
    
• How to determine correct subsurface fluid gradients

   
• Using pressure/depth graphs to correlate reservoirs (Are zones continuous or separate?)
   
• How to predict gas/oil/water contacts downdip from new discovery wells
   
• How to make potentiometric surface and pressure maps to reveal where the best permeability is
   
• How to find permeability barriers (stratigraphic) traps from pressure drops in the reservoir
   
• Identifying areas of updip and downdip flow and how this affects the sealing capability of the trap
   
• Gas phase Continuity - how to find Central Basin type gas traps
   
• Unconformity traps - assessing their leakage potential, incl. subcrop edges
   
• Identifying 'flushed' areas
   
• Using chemical water analysis to correlate zones - Stiff diagrams
   
• Find oil/gas migration pathways from saturation pressures of pools

      
• DEFINING A STRATIGRAPHIC TRAP (800 MM BBL. OILFIELD) Devonian Sst.

A reservoir pressure/continuity map is made to define major sand pinchout edge
Raw pressure/fluid data prior to discovery is utilized

• It will be shown how the oilfield could have been initially missed due to a false pressure from an old DST
• Students will predict extent of field from discovery DST pressure to decide land acquisition strategy


• IDENTIFYING FLUSHED VS. PROSPECTIVE AREAS IN WILLISTON BASIN

Students make regional potentiometric surface maps to define flow direction in Mississippian Carbonates and other zones

These identify:

• It will be shown how the oilfield could have been initially missed due to a false pressure from an old DST
• Students will predict extent of field from discovery DST pressure to decide land acquisition strategy


• FINDING GIANT BUT SUBTLE GAS RESERVES (Central Basin Gas type trap)


• Students given a few small isolated (1 Bcf) gas pools with interspersed "water" tests
• Gas pressure continuity exercise shows mis-correlation by industry
• Pools really form one huge accumulation and "water" was filtrate
• Now over 70 wells drilled with 1 Tcf reserves
• Spectacular recent example of a pressure depth plot used as gas finding tool

LOCATION

First day will be held at the Sofitel Hotel, in Cairo. The participants will fly the next day to Hurghada for The course to be continued there.

COURSE FEES

FIVE DAYS    U.S.$ 1750
The cost is inclusive of course manual, guidebook, and accommodation in Hurghada.

INSTRUCTOR PROFILE

Hugh Reid operates an international petroleum consultancy based in Calgary, Canada, which specializes in Hydrodynamics Studies and DST Interpretation. He has broad experience in teaching seminars to the petroleum industry, having presented these in over 17 countries, representing more than 200 companies, over the past 26 years.

He holds a B.Sc.(Geology) from the Univ. of Bristol, U.K. He has over 30 years experience in DST analysis and hydrodynamics, 10 years with Mobil Oil in Calgary and over 20 years as an independent consultant. He is the author of various DST manuals and technical articles on testing, hydrodynamics (IPA) and formation damage.

His regional pressure studies have covered areas in North Africa and Indonesia, as well as North America. He is a past president of the Canadian Well Logging Society, also a member of CSPG, SPE & AAPG.