A Century of Kern County Petroleum
Few American cities are as closely identified with oil as Bakersfield. The discovery of the Kern River field in the late nineteenth century, followed by Midway-Sunset, Elk Hills and other major accumulations, established the southern San Joaquin Valley as one of the most productive petroleum provinces in the country. More than a century later, Kern County still accounts for the overwhelming majority of California crude oil production.
The oil that defines the region is technically distinctive. Much of it is heavy, viscous crude that will not flow readily to the surface under natural pressure. Producing it economically required the development of thermal recovery techniques, primarily steam injection through cyclic steam stimulation and steamflooding. That engineering heritage created a specialized local workforce and a dense network of service companies, and it explains why Bakersfield remains a center of petroleum technical expertise rather than merely a production site.
The Structure of the Local Industry
The Bakersfield petroleum economy has several layers. Exploration and production operators own and develop the fields. Oilfield service companies provide drilling, well servicing, wireline, cementing, artificial lift, chemical treatment and workover capability. Midstream companies handle gathering, transportation, storage and processing. Refiners convert crude into fuels and products. Supporting all of these are equipment manufacturers, machine shops, environmental consultants, engineering firms and specialized transportation providers.
Employment across these tiers has historically been well compensated and technically demanding, supporting a substantial middle class in the city. The industry also generates significant property tax revenue that funds county services, schools and infrastructure, which is why energy policy debates carry particular weight in local civic life.
The Top 10 Oil and Gas Companies in the Bakersfield Area
1. California Resources Corporation. The largest independent oil and gas producer in California, CRC operates extensively across Kern County fields and maintains a major regional presence. Beyond conventional production, the company has pursued carbon management and energy transition initiatives that leverage its subsurface expertise and existing infrastructure, positioning it as both a legacy producer and a participant in emerging low carbon business lines.
2. Chevron. With historical roots reaching back to the earliest days of California petroleum, Chevron has long been a central operator in Kern County heavy oil, particularly in thermal recovery operations. Its technical programs in steamflood optimization and reservoir management have influenced industry practice worldwide, and its local operations remain a significant employer.
3. Aera Energy. A major California focused producer with substantial Kern County operations, Aera Energy has been recognized for operational efficiency in heavy oil development and for workforce and community engagement in Bakersfield. Its concentration on California assets means its technical focus aligns tightly with local reservoir conditions.
4. Berry Corporation. Headquartered with strong Bakersfield ties, Berry Corporation specializes in low decline, long life California oil assets with an emphasis on thermal diatomite and heavy oil production. As a smaller independent, it is often cited for disciplined capital allocation and steady operational execution rather than aggressive expansion.
5. E and B Natural Resources. A privately held California operator with Bakersfield area assets, E and B Natural Resources focuses on acquiring and optimizing mature fields. Companies in this segment extend the productive life of older reservoirs through improved recovery techniques, well remediation and operating cost control.
6. Sentinel Peak Resources. Operating California legacy oil properties, Sentinel Peak represents a category of independents that acquire assets from larger companies and apply focused technical attention. This model has kept many Kern County fields productive well beyond initial expectations.
7. Halliburton. Among the largest global oilfield service providers, Halliburton supports Kern County operations with cementing, stimulation, completion technology, artificial lift and production chemistry. Its Bakersfield area facilities employ engineers and field crews supporting operators across the valley.
8. Schlumberger and Baker Hughes service operations. Both major service companies maintain regional capability serving California producers with drilling technology, wireline evaluation, artificial lift systems, and increasingly digital reservoir monitoring and production optimization software. Their presence gives local operators access to advanced technology without building it internally.
9. Regional well servicing and workover contractors. Bakersfield hosts a substantial base of independent well servicing companies operating rig fleets for maintenance, pump changes, tubing repair, plugging and abandonment. Heavy oil thermal operations require frequent well intervention, making this segment unusually large here compared with other basins. These companies are often family founded and deeply embedded in the local labor market.
10. Kern Oil and Refining and regional refining operations. Refining converts local crude into transportation fuels and other products. Kern Oil and Refining operates in the Bakersfield area, and regional refining and renewable fuels conversion projects have added interest as some facilities pivot toward processing renewable feedstocks. Refining and processing represent the value added end of the local hydrocarbon chain.
Technology and Operational Practice
Modern Kern County operations look different from popular imagination. Steam generation efficiency, produced water treatment and recycling, cogeneration, automated well surveillance, downhole sensors and predictive maintenance analytics are standard. Operators monitor thousands of wells remotely, dispatching crews based on data rather than fixed schedules. Emissions control, methane detection and leak repair programs have become core operational functions rather than compliance afterthoughts.
Regulatory and Market Pressures
California maintains among the most stringent environmental regulatory frameworks in the world, affecting permitting, setbacks, idle well management, plugging and abandonment obligations, air quality and water use. Combined with global price volatility, this creates a challenging operating environment. Companies have responded by prioritizing efficiency, reducing emissions intensity and exploring adjacent businesses including carbon capture and storage, renewable fuels and geothermal, all of which draw on subsurface and industrial expertise already concentrated in Bakersfield.
Workforce and Community
Petroleum work in Kern County supports engineers, geologists, mechanics, electricians, welders, truck operators, safety professionals and environmental specialists. Local colleges and training programs supply this pipeline, and many of these skills transfer directly to renewable energy, carbon management and industrial construction. That transferability is central to how the region thinks about its economic future.
Final Thoughts
Oil and gas in Bakersfield is a technically sophisticated, heavily regulated and economically vital industry with more than a hundred years of accumulated expertise. The companies above range from large independents and global majors to family founded service contractors and local refiners. Whatever direction energy policy takes, the engineering knowledge and industrial capability concentrated in Kern County will continue to shape how the region participates in the broader energy economy.