The Industry’s Reserves

Estimation Meeting:

June 20-21, 2018

Houston, TX

Pre-Conference Workshop Day
Tuesday, June 19 2018

08.30 - 16.00
Production Forecasting & Reserves Estimation in Shale Reservoirs with Multi-Phase Flow
Workshop Leader: Stuart Cox, Vice President - Reservoir Engineering, PetroEdge Workshop Leader: David Fulford , Staff Reservoir Engineer, Apache Corporation

An important topic that has arisen in the last few months is rising gas-oil-ratios in liquid-rich reservoirs, notably in the Permian basin. Because of this issue and public claims that were made, the value of one stock dropped by about $7 billion in less than a day. Claims have often been based on bad technology.This issue, generally one that arises in ultra-tight volatile oil reservoirs, needs a thorough focus.

The morning will focus on the fundamentals, followed by case histories and practical examples of applying to datasets in afternoon. The day will finish by running through a workflow that you can take home and apply within your own organization.

What will be discussed:

  • Examples of where models are changing over time with changes in EURs and EGRs (gas, liquids and NGLs)
  • Impacts of substantial increase of gas oil ratio on production and reserves
  • For retrograde (or condensate gas) reservoirs, what happens once the reservoir reaches the dew point pressure and how would that impact, future production and reserves?
  • Recovery factors and lift methods for moving oil in retrograde and volatile oil reservoirs: The potential to enhance oil recovery from these reservoirs
  • How can recovery be enhanced from retrograde gas reservoirs? Potential for maintaining reservoir pressure above dew point pressure
  • E.g. Injecting gas to maintain reservoir pressure
  • Rate transient analysis for single phase and how successfully is this being applied for multi-phase?
  • Exploring simulation for multiphase modelling
  • Yield and variation with yield, not just with time but with stress data and geomechanics etc
  • Leveraging infield data pressures

Stuart Cox, Vice President - Reservoir Engineering, PetroEdge

David Fulford , Staff Reservoir Engineer, Apache Corporation

David Fulford is a Staff Reservoir Engineer, Exploration Evaluation, at Apache Corporation. He has 11 years of industry experience with Apache and, previously, Devon Energy. His current work focuses on portfolio modeling and project characterization for long-term capital guidance, which incorporates production surveillance, stochastic modeling, risk & uncertainty quantification, and estimation de-biasing & calibration. Fulford is a member of the Society of Petroleum Engineers (SPE), Society of Petroleum Evaluation Engineers (SPEE), and Society of Decision Professionals (SDP).