(By Oil & Gas 360) – The next great American oil boom may not come from discovering a new basin. It may come from recovering more oil from fields that have already been producing for decades. For more than a century, the U.S. oil industry has focused on finding new resources. From the giant conventional fields of Texas and California to the shale revolution that transformed North Dakota, New Mexico, and Pennsylvania, success has largely been measured by what operators could discover and develop. But even after decades of production, enormous volumes of oil remain underground. Traditional production methods often recover only 10% to 40% of the oil originally in place. The remaining hydrocarbons stay trapped within reservoir rock, technically discovered but economically unreachable using conventional techniques. That is where Enhanced Oil Recovery, or EOR, enters the picture. Using technologies such as carbon dioxide injection, natural gas injection, thermal recovery, advanced reservoir modeling, and artificial intelligence, operators are increasingly finding ways to extract oil once considered unrecoverable. Some estimates suggest the value of these remaining resources could exceed $42 trillion, making EOR one of the largest untapped energy opportunities in the United States. The opportunity spans nearly every major producing state. Texas sits at the center of the story. As the nation’s largest oil-producing state, Texas contains some of the largest remaining EOR opportunities in North America. The Permian Basin continues to drive U.S. production growth, yet recovery rates from many unconventional reservoirs remain relatively low. Even modest improvements in recovery factors could translate into billions of additional barrels. South Texas offers another significant opportunity. The Eagle Ford Shale helped launch the American shale revolution, but operators continue to leave substantial volumes behind after primary production. Advances in gas reinjection, CO2 flooding, and next-generation reservoir management technologies are opening the door to additional recovery from acreage that has already been developed. Texas also possesses an important advantage. The state’s extensive pipeline systems, refining network, export terminals, and growing carbon capture infrastructure create an ideal environment for large-scale EOR deployment. North Dakota is pursuing what many have called a second Bakken boom. The Bakken transformed the state into one of America’s largest oil producers, but operators have long known that significant quantities of oil remain trapped within the reservoir. New technologies, including advanced reservoir imaging, AI-driven production modeling, and CO2 injection programs, are being evaluated to unlock additional recovery. If successful, North Dakota could significantly increase production without relying on major new discoveries. Wyoming may be the most experienced EOR state in America. For decades, Wyoming producers have successfully utilized carbon dioxide flooding in mature conventional fields. The state has developed extensive expertise in managing enhanced recovery projects and is increasingly viewed as a model for future EOR expansion across the country. As carbon capture projects expand nationwide, Wyoming’s experience could become increasingly valuable. New Mexico represents another major opportunity. The state’s portion of the Permian Basin has become one of the fastest-growing oil-producing regions in the world. But like neighboring Texas, operators are beginning to focus not only on drilling new wells but also on improving recovery from existing developments. As shale basins mature, maximizing recovery rates may become just as important as expanding drilling inventories. California remains one of the industry’s most overlooked EOR opportunities. Long before the shale revolution, California was America’s largest oil-producing state. Many of its mature fields still contain enormous volumes of remaining hydrocarbons. Steam flooding and thermal recovery techniques have already demonstrated success across parts of the state. While regulatory challenges remain significant, the resource potential continues to attract industry attention. Louisiana could emerge as one of the most important future EOR markets because of its strategic position along the Gulf Coast. The state is home to a vast network of refineries, petrochemical facilities, pipelines, LNG terminals, and emerging carbon capture projects. As CO2 infrastructure expands across the Gulf Coast, opportunities to pair carbon storage with enhanced oil recovery are expected to grow. That combination could simultaneously support domestic oil production and long-term carbon management goals. Colorado also plays an important role. The state has a long history of carbon dioxide-based enhanced recovery projects and sits near important CO2 sources and transportation networks. While smaller than Texas or North Dakota, Colorado demonstrates that EOR opportunities extend well beyond the country’s largest producing regions. What makes EOR especially attractive today is timing. The Permian Basin remains the world’s most productive shale play, but questions are beginning to emerge about long-term inventory quality. Many mature basins are moving deeper into development mode. At the same time, geopolitical instability surrounding the Middle East and the Strait of Hormuz has renewed attention on domestic energy security. Enhanced recovery offers a different path forward. Rather than searching for entirely new discoveries, operators can focus on producing more from reservoirs they already understand. The infrastructure already exists, the geology is already known. The resource has already been discovered, the challenge is recovering more of it. The shale revolution changed what America could produce. Enhanced Oil Recovery may determine how much of it can ultimately recover. If technology continues advancing, the next great American oil boom may not come from finding something new; it may come from unlocking the billions of barrels that have been hiding in plain sight all along. About Oil & Gas 360 Oil & Gas 360 is an energy-focused news and market intelligence platform delivering analysis, industry developments, and capital markets coverage across the global oil and gas sector. The publication provides timely insight for executives, investors, and energy professionals. Disclaimer This opinion article is provided for informational purposes only and does not constitute investment, legal, or financial advice. The views expressed are based on publicly available information and market conditions at the time of publication and are subject to change without notice.