Challenges in Reserves Estimate for Tight/Unconventional Reservoirs Michael N
Challenges in Reserves Estimate for
Saad Ibrahim, P. Engineer, President Petro Management Group
Interactive Workshops: June 8, 2017 , Calgary AB
As the oil industry in North America is shifting fast into the exploitation of tight and
unconventional reservoirs; with permeability ranging from Micro to Nano Darcy,
reserves estimate is becoming a challenging task. Reserves definitions; such as,
Stimulated Reservoir Volume (SRV) and Contacted Reservoir Volume (CRV) will be
discussed. When all methods fail, we tend to seek help from the decline analysis
technique. Decline analysis and its derivative; such as the Power Law Loss-Ratio
Method, are simple and fast to use being empirical, however, they do have some
limitations. Rate Transient Analysis (RTA) techniques, have merits, as no long well
shut-ins are required. More advance methods using numerical techniques can produce
more reliable reserve estimates and can deal with complex reservoirs and
heterogeneities. Several case studies will be presented to demonstrate the various
1. Why reserves estimate is challenging for tight/unconventional reservoirs?
2. Conventional methods for estimating reserves
3. Methods used for tight/unconventional reserves estimate
4. Case studies
Typically this L&L starts at 11:30 am (complimentary lunch is offered by PMG) and the
technical presentation usually runs from 11:40 am until 12:50 noon, leaving 10 minutes
for questions at the end.
Speaker: Mr. Saad Ibrahim, P. Eng. – or Hoshne Banu, P. Eng.
Saad Ibrahim has over 35 years of diversified experience in the Petroleum Industry in Western Canada and Internationally including projects in Yemen, Libya, Egypt, Nigeria, Iraq, Turkey, Russia, Kazakhstan, Uzbekistan, Venezuela, Argentina, Peru and Ecuador. His focal experience is in Reservoir Engineering with emphasis on field development planning, evaluation of depletion strategies and production optimization of a wide spectrum of oil and gas fields. He has evaluated and initiated horizontal well applications that resulted in a remarkable increase in production levels. He also has a special interest in well test planning and analysis using state of the art software (F.A.S.T by Fekete and PanSystem). He has been involved in all phases of implementing secondary and tertiary recovery schemes. He has also expertise in technical and economic evaluations of oil and gas properties for acquisition and divestiture ventures. Mr. Ibrahim has conducted numerous technical presentations to the Petroleum Society of the CIM and various training courses to the industry.