Energy Resources Program

Energy Resources Program Home

Reserve Growth Banner

Reserve Growth

News & Recent Publications

Wednesday, May 29, 2013

Reserve Growth of Oil and Gas Fields

Investigations and Applications

USGS Publication: Scientific Investigations Report 2013–5063
The reserve growth of fields has been a topic for ongoing discussion for over half a century and will continue to be studied well into the future. Understanding past methods of estimating future volumes based on the data assembly methods that have been used can lead to a better understanding of their applicability. 

Wednesday, November 28, 2012

Remaining Recoverable Petroleum in Giant Oil Fields of the Los Angeles Basin, Southern California

USGS Publication: Fact Sheet 2012–3120, v. 1.1
Using a probabilistic geology-based methodology, a team of U.S. Geological Survey (USGS) scientists recently assessed the remaining recoverable oil in 10 oil fields of the Los Angeles Basin in southern California. The results of the assessment suggest that between 1.4 and 5.6 billion barrels of additional oil could be recovered from those fields with existing technology.

Tuesday, August 14, 2012

Assessment of Potential Additions to Conventional Oil and Gas Resources in Discovered Fields of the United States from Reserve Growth, 2012

Press Release & Publication
The U.S. Geological Survey estimated volumes of technically recoverable, conventional petroleum resources that have the potential to be added to reserves from reserve growth in 70 discovered oil and gas accumulations of the United States, excluding Federal offshore areas.

Monday, June 18, 2012

Assessment of Potential Additions to Conventional Oil and Gas Resources of the World (Outside the United States) from Reserve Growth

Press Release & Publication
The U.S. Geological Survey estimated volumes of technically recoverable, conventional petroleum resources resulting from reserve growth for discovered fields outside the United States that have reported in-place oil and gas volumes of 500 million barrels of oil equivalent or greater. The mean volumes were estimated at 665 billion barrels of crude oil, 1,429 trillion cubic feet of natural gas, and 16 billion barrels of natural gas liquids.

Friday, April 27, 2012

Assessment of remaining recoverable oil in selected major oil fields of the San Joaquin Basin

USGS Publication: Fact Sheet 2012–3050
The U.S. Geological Survey (USGS) recently completed an estimate of volumes of technically recoverable, conventional oil that could eventually be added to reserves in nine selected major oil fields in the San Joaquin Basin in central California. The mean total volume of potential oil reserves that might be added in the nine fields using improved oil-recovery technologies was estimated to be about 6.5 billion barrels of oil.

Thursday, November 17, 2011

New U.S. Geological Survey Method for the Assessment of Reserve Growth

USGS Publication: Scientific Investigations Report 2011–5163
A new U.S. Geological Survey method was developed to assess the reserve-growth potential of technically recoverable crude oil and natural gas to be added to reserves under proven technology currently in practice within the trend or play, or which reasonably can be extrapolated from geologically similar trends or plays. This method currently is in use to assess potential additions to reserves in discovered fields of the United States.

Tuesday, July 20, 2010

Reserve Growth During Financial Volatility in a Technologically Challenging World

USGS Publication: Open-File Report 2010-1145
Reserve growth (growth-to-known) is the addition of oil and gas quantities to reported proved or proved-plus-probable reserves in discovered fields. The amount of reserve growth fluctuates through time with prevailing economic and technological conditions. Most reserve additions are the result of investment in field operations and in development technology.


Cover of USGS B2172, 'Geologic, Engineering, and Assessment Studies of Reserve Growth'
Geologic, Engineering, and Assessment
Studies of Reserve Growth,
USGS Bulletin Series

The Energy Resources Program has completed numerous oil and gas resource assessments and continues research on the contribution and significance of reserve (field) growth. Field growth is the increase in total proved reserves of an existing field through time. This increase is based upon geological and engineering data with reasonable certainty to be recoverable with existing economic and operating conditions. Field growth occurs in almost all petroleum provinces of the world and is considered the most important source for additional reserves in the United States. Identified resources exceeding the proved reserves are added to existing fields by a variety of methods including: field extension, field revision, improved recovery efficiency, improved reservoir characterization, and the addition of new pools or reservoirs


Tim Klett
Task Lead



Page Last Modified: Tuesday, July 23, 2013


Publications Database
Publications & Advanced Search
A searchable database of thousands of published sources, dating back several decades
USGS Energy Data Finder
Find Data
USGS Energy Data Finder:  Download GIS and tabular data, databases, geospatial web services (ArcGIS, WMS, KML)
A single map viewer portal incorporating a range of maps, data and services
National Coal Resources Data System
National Coal Resources Data System
USGS coal resources databases of national scope