Incremental Oil Recovery from Depleted Oilfields in a Low Oil Price Environment Bringing New Life to Mature, Depleted Oil Fields ENERCOMS THE OIL & GAS CONFERENCE DENVER, COLORADO AUGUST 13-17, 2017 An Equity Partner With
OUTLINE 1. Options for increasing oil recovery in a depleted oilfield. The case for air injection. 2. Comprehensive reservoir screening methodology Importance of a mechanistic oil displacement model 3. Operational levers for…
The Case for Air Injection IOR OPTIONS FOR A DEPLETED RESERVOIR Enercom August 2017
Stimulation Processesof any kind Reservoir Energy is required to produce oil from the stimulated reservoir, i.e.: Reservoir Pressure, or Gravity drainage in thick reservoirs. Usually not available in depleted reservoirs.…
EOR Flooding Recovery Factor = EA . EV . ED EA = Areal Sweep (mobility ratio, pattern configuration)) EV = Vertical Sweep (heterogeneity, over/underride) ED = Displacement Efficiency (EOR process) Displacement Efficiency is a key…
Waterflooding and Polymer Injection (Residual Oil Saturation) RESIDUAL OIL SATURATION AFTER 25 PV OF WATERFLOODING 0.35 ED = = Enercom August 2017
Carbon Dioxide Flooding Minimum Miscibility Pressure National Petroleum Council, Enhanced Oil Recovery, Washington D.C. (1976) Holm and Josendal (1982) and Yellig and Metcalf (1980). Enercom August 2017
Surfactant Injection Most complex of the EOR methods and accompanied with high degree of uncertainty. Critical Micelle Concentration (CMC) depends on temperature, pressure, and (sometimes strongly) on the presence and concentration…
Steam Flooding Unless legacy wells are available, the low oil content mandates relatively large well spacing associated with new drilling. Large well spacing and the low oil content in depleted fields challenge steam flooding.…
Oil Recovery by Air Injection So consumed 0.08 Enercom August 2017
Electrical Ignition of an Air Injection Well (Suplacu de Barcau) Enercom August 2017
Technically Successful Air Injection Projects Permeability Viscosity 30 40 35 25 30 Frequency Frequency 20 25 15 20 10 15 10 5 5 0 0 10 1500 3000 4500 6000 11500 More 0.8 500 2000 5000 10000 100000 More Millidarcies…
Successful Air Injection Applications Include: Secondary Recovery Double-displacement following water encroachment in an active water-drive reservoir Follow-up to cyclic steam stimulation in bitumen Tertiary Recovery After…
A Critical First Step. COMPREHENSIVE RESERVOIR SCREENING FOR AIR INJECTION EOR Enercom August 2017
Screening Criteria Should They Exist Published rock and fluid criteria for air injection EOR are woefully inadequate e.g. BPs Wolf Lake enriched air They do not reflect Operational controls available for optimizing recovery and…
Fit-for-Purpose Approach Rock and fluid properties Mechanistic oil displacement model with operational controls Combustion parameters Full-field development plan including scheduling and distribution of compression capacity…
Fuel Load Garon and Wygal. SPEJ, December 1974. Enercom August 2017
Mechanistic Approach 1. This model predicts the performance of both dry and wet combustion and provides mechanistic insight regarding the oil displacement. 2. At any given time, oil displace due to the gas flood, steam zone,…
Oil Displacement Models SUPRI VS. Mechanistic Approach (Dry Combustion) SUPRI Empirical Model Mechanistic Model PATTERN OIL PRODUCTION PATTERN OIL PRODUCTION 250.0 300.0 250.0 300.0 Cum. Oil Production (MSTB) / Cum. Oil…
Combustion Steam Bank Arrival at Producer (Suplacu de Barcau) Enercom August 2017
Important Geological Features Must be Represented Enercom August 2017
Impact of Water-Air Ratio Enercom August 2017
Important Operational Levers for Profitability 1. Well spacing for new drilling Primarily controlled by oil content Major impact on capital investment 2. Maximum air-oil ratio before compression capacity is shifted to a new…
Conclusions A mechanistic approach to reservoir screening for air injection EOR will provide much needed confidence for deployment. Significant body of knowledge is available for directing and providing rapid performance and…
Belgrave Oil & Gas Corp. Engagements Canada Colombia Husky Energy. Ecopetrol. Logic Energy. Russian Federation Saskatchewan Research Council. Salym Petroleum. Connacher Oil and Gas Ltd. Moscow Petroleum Institute. Nexen.…
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