Global energy demand continues to rise, even as traditional oil reservoirs deplete and environmental pressure increases. In this context, the petroleum industry is facing a critical challenge: how to maximize recovery from existing oil fields in a sustainable and cost-effective manner. While primary and secondary recovery techniques can extract only a fraction of the oil in place—typically 20-40%—a significant volume remains untapped deep within the reservoir rocks. This is where Enhanced Oil Recovery (EOR) steps in as a transformative solution.
At Shandong UPS Chemical Co., Ltd., we are proud to support oil and gas companies globally with innovative, high-performance chemical solutions designed specifically for Enhanced Oil Recovery applications. With years of research, formulation expertise, and a deep understanding of reservoir chemistry, we provide EOR chemicals that not only improve extraction efficiency but also support operational sustainability and long-term profitability.
What Is Enhanced Oil Recovery (EOR)?
Enhanced Oil Recovery refers to a set of advanced technologies used to increase the amount of crude oil that can be extracted from an oil reservoir after primary and secondary recovery methods have been exhausted. Where primary recovery relies on natural reservoir pressure and secondary recovery typically involves water or gas injection, EOR goes a step further—modifying reservoir properties to mobilize more trapped oil.
It’s often called tertiary recovery, and it can increase total oil recovery by an additional 10% to 30% of the original oil in place. This is a game changer, especially for aging oil fields nearing the end of their productive life.
Why EOR Is Becoming Increasingly Important?
1. Depletion of Easily Accessible Oil Reserves
As the global energy industry moves to more mature oil fields, maximizing output from old wells becomes a more attractive investment than exploring new ones.
2. Energy Security & Strategic Reserve Utilization
Countries aiming to reduce oil imports turn to EOR to get more yield from domestic resources.
3. Economic Viability
Technological advancements and favorable crude oil prices have made EOR economically attractive, especially compared to exploring and developing new fields.
4. CO₂ Utilization in Carbon Management
Certain forms of EOR strategically utilize carbon dioxide (CO₂), offering potential alignment with climate goals by sequestering CO₂ while increasing oil recovery.
Major Techniques of Enhanced Oil Recovery
The EOR process can be broadly divided into three primary categories, with each method selected based on reservoir characteristics, oil properties, and production goals.
1. Thermal EOR
- What It Is
Thermal methods involve the application of heat to reduce crude oil viscosity, making it easier to flow to the wellhead.
- Main Techniques
- team Injection / Steam Flooding: Injects steam into the reservoir to lower viscosity and increase pressure.
- Cyclic Steam Stimulation (Huff and Puff): Alternating injection and production cycles within the same well.
- In-Situ Combustion: Igniting a portion of the oil to generate heat underground.
- Best Use Cases
Heavy oil reservoirs with shallow formations, such as those in Venezuela or California.
2. Gas Injection EOR
- What It Is?
Involves injecting gas into the reservoir to increase pressure and improve oil displacement.
- Types of Gases Used
- CO₂ (Carbon Dioxide) – Most popular, especially for miscible flooding.
- Natural Gas (Methane)
- Nitrogen
Gas injection can be miscible (mixes with oil) or immiscible (does not mix) depending on reservoir conditions.
- Environmental Benefit
CO₂-EOR allows for carbon capture and sequestration, reducing a facility’s net carbon footprint.
3. Chemical EOR
Chemical EOR leverages a range of engineered chemical formulations to alter rock-fluid interaction, enhance sweep efficiency, and reduce interfacial tension between oil and water.
- Main Chemicals Used
- Polymers: Increase water viscosity for better sweep and pressure maintenance.
- Surfactants: Break interfacial tension between trapped oil and reservoir rock surfaces.
- Alkalis: React with acidic crude components to form in-situ surfactants.
- Polymer-Surfactant mixes: Offer synergistic effect.
Shandong UPS Chemical Co., Ltd.: Your Partner in Chemical EOR
While thermal and gas injection methods require infrastructure and geographic preconditions, chemical Enhanced Oil Recovery has gained popularity due to its flexibility, adaptability, and scalable economics. At Shandong UPS Chemical Co., Ltd., we specialize in the production and supply of advanced EOR chemicals including:
- Cationic and Anionic Polymers
Used to modify water mobility, reduce fingering, and ensure thorough oil displacement, especially in heterogeneous reservoirs.
- Surfactants
Designed to minimize interfacial tension and mobilize residual oil by improving rock wettability and reducing capillary forces.
- Alkaline Additives
React with crude oil to generate soap-like agents in-situ, enhancing oil displacement in carbonate and sandstone formations.
- Customized Polymer Formulations for ASP (Alkali-Surfactant-Polymer) Flooding
We provide tailored ASP systems, optimized based on reservoir salinity, temperature, and permeability.
- Anti-Scalants, Biocides & Rheology Modifiers
Support chemical EOR operations by ensuring pipeline integrity and formation compatibility.
All our chemical products undergo a multi-stage QA/QC process, ensuring consistency, reservoir compatibility, and long-term stability under extreme subsurface conditions.
Benefits of Enhanced Oil Recovery
Enhanced Oil Recovery offers a wide range of economic, environmental, and strategic advantages to operators who invest in its application.
1. Maximizes Field Lifecycle
Delays abandonment by extracting up to 60%+ of original oil in place.
2. Increases ROI on Existing Infrastructure
Reduces CAPEX by utilizing existing wells, pipelines, and surface facilities.
3. Improves Production Predictability
Advanced modeling and chemical EOR pilots allow for more controlled recovery curves.
4. Stimulates Local Economy and Employment
Additional years of field operation translate to more jobs and community benefits.
5. Enables Reservoir Management with Carbon Goals
Especially for CO₂-EOR, the process allows for permanent carbon sequestration, supporting ESG compliance and carbon credit programs.
Global Market Impact of Enhanced Oil Recovery
According to recent industry reports:
- The global Enhanced Oil Recovery market exceeded USD 40 billion in 2023 and is projected to reach USD 65+ billion by 2028.
- Chemical EOR is the fastest-growing segment due to success in mature oilfields across Asia-Pacific and the Middle East.
- Governments in China, India, and the U.S. are promoting policies to support CO₂-EOR under climate and energy balancing acts.
Market Trends:
- Increased EOR deployment in tight formations and unconventional reservoirs
- Rising demand for EOR-specific surfactants and polymers
- Integration of AI and real-time reservoir modeling to refine EOR strategies
As both global energy demands and environmental regulations evolve, the strategic value of Enhanced Oil Recovery has never been clearer. What began as a solution for aging oil fields has now emerged as a multi-billion-dollar pathway toward optimized resource use, greater energy security, and lower emissions.
FAQs – Enhanced Oil Recovery
Q1: What is Enhanced Oil Recovery (EOR)?
Enhanced Oil Recovery includes any tertiary method applied to recover more oil after primary and secondary methods have failed to extract enough. It uses heat, gas, or chemicals to mobilize trapped oil.
Q2: Which EOR technique is best for my reservoir?
It depends on:
- Reservoir temperature, pressure, and depth
- Oil viscosity
- Formation lithology
- Economic analysis
Talk to our experts at Shandong UPS Chemical Co., Ltd. for a customized reservoir evaluation.
Q3: What chemicals are used in Chemical EOR?
We use surfactants, polymers (anionic, nonionic, cationic), alkalis, and tailored blends known as ASP formulations for better oil mobilization and sweep efficiency.
Q4: Is Chemical EOR environmentally friendly?
Yes. Our products are designed to be:
- Low-toxicity
- Biodegradable (where applicable)
- Compatible with formation ecology
Q5: How much more oil can EOR recover?
- Primary + Secondary: Recover up to 40%
- With EOR: Can increase to 50–70% of the oil originally in place.
Q6: What is the role of polymers in EOR?
Polymers increase water viscosity during flooding, improving sweep efficiency and displacing more oil uniformly across the reservoir.
Q7: Can CO₂-EOR help reduce emissions?
Yes, CO₂-EOR not only improves oil extraction but also enables permanent geological storage of CO₂, qualifying projects for carbon credits or emission offset incentives.
