Petroleum Technology Luncheon - April 9th

The next Petroleum Technology Luncheon is on Tuesday April 9th.

4101 E. Willow St
Long Beach, CA 90815
Registration: 11:30 AM
Lunch: 11:45 AM
Presentation: 12:00-1:00 PM
$30.00 members (+$1 credit card fee)
$30.00 for non members (+$1 credit card fee)
$10 for students

Injection Well Rate and Pressure Analyses Suggest Practical Waterflood Improvements

Glenn Swanson
Sterling Engineering Inc.


Waterflood injection wells operate at maximum efficiency when delivering maximum, non-fracturing matrix rates to highest oil water ratio (OWR) subzones. Decreasing OWR observed during the later years of a mature waterflood intensifies need for analysis and optimization of injection efficiency. Analyses of injection rates, pressures and distribution profiles, especially when combined with recently more available step rate test (SRT) data allow injector efficiencies to be quantified in terms of estimated resulting BOPD.

The Los Angeles basin is home to many mature, low OWR waterfloods and a large, steadily increasing number of injection wells. In order to analyze injection efficiency over time, a prototype injection well, designed to include features common to LA basin injectors, was evaluated at key times of design, SRT, startup, profile deterioration, and finally, 100% point exit.

The talk will review the findings and provide practical suggestions to accomplish DOGGR/UIC fracture-prevention goals utilizing traditional and/or modified SRT designs to generate a permitted “Maximum Allowable Rate”.


Glenn Swanson is the Principal Consultant for Sterling Engineering, which he incorporated in 2008 primarily to provide LA basin operators with independent petroleum engineering consulting services.

Since his 1977 oilfield start in Signal Hill, Glenn has been fortunate to work in nearly every major California oilfield as a consultant, operator or service hand.

He first became interested in pressure and rate analysis during the early years of Belridge and Lost Hills fracturing. Subsequent projects involving injection optimization and permitting provided opportunities to work a wide variety of injection problems utilizing real world data sets.

In some ways, his latest paper is a follow-up to the 2004 LA Basin Water Control consortium project documented in SPE 94003, which inspired analysis of best practices re oil cut decline prevention.

Glenn’s resume features a BS in chemical engineering (Princeton 1976), an MS in petroleum engineering (USC 1984) and a California PE registration. Active in SPE for forty years, he was General Chairman of the 2000 WRM, first ever meeting co-sponsored by SPE and AAPG. His SPE resume also includes co-authorship of 6 SPE papers, decades of WRM technical program committee work, as well as local LA Basin section officer service.