Introduction
Understanding oil and gas reserves is critical if you were to value energy companies or long-term production potential, or to make well-informed investment decisions. Reserve figures are always found in annual reports or earning logas, and in industry forecasts, but many investors misinterpret what the figures actually mean.
If you are developing your understanding of energy markets, then learning the difference between proved and probable classifications will help you build a deeper understanding of risk, valuation, and long-term sustainability. This guide breaks down oil and gas reserves, including what proved and probable oil and gas reserves really mean to the investor.
What Are Oil and Gas Reserves?
Oil and gas reserves refer to the estimated amounts of crude oil and natural gas that are expected to be recoverable commercially from existing known reserves under existing economic conditions and extracted using existing production processes. The term “commercial” is key. Reserves are not just about what lies in the ground; they are about what can be extracted profitably, given current technology, prices, and regulations.
Reserves are distinguished from resources. Resources are all estimated hydrocarbons in place, whether recoverable or not. Reserves, on the other hand, are what companies reasonably believe they will be able to extract and would have a chance to sell. For investors, reserve information is useful for answering one basic question: How long can this company continue producing?
Why Oil and Gas Reserves are Important to Investors
When evaluating energy companies, reserves represent one of the most important measures of the long-term value of the company. Production is revenue at present, but reserves are also potential future production.
A company with large and stable oil and gas reserves may have:
- Greater visibility of revenue in the long term
- Stronger asset backing
- Higher valuation multiples
On the contrary, reducing reserves is a harbinger of possible difficulties ahead unless discoveries or acquisitions compensate for the supply. Understanding proven and probable oil and gas reserves helps you get an understanding of how certain those future revenues are.
Major Categories of Oil and Gas Reserves
Reserves are classified depending on the extent of certainty of their economic recovery. Industry standards (which are themselves often informed by regulatory institutions) include three main categories into which the reserves fall:
Proved Reserves (1P):
Proved reserves are amounts of oil and gas for which geological and engineering data prove with reasonable certainty that the oil and gas are recoverable under present economic conditions. This is the least aggressive and best classification.
Some of the stringent criteria for establishing proved reserves are as follows:
- Verified through drilling and testing
- Recoverable using existing technologies
- Economically justifiable at current prices
- Alleged to be legally permitted for production
It is because of such a high confidence level that proved reserves tend to be used in financial modelling and in the process of company valuation, for that matter. When you see a company report “1P reserves”, they are referring to their proved oil and gas reserves.
Probable Reserves
Probable reserves are less certain (than proved reserves) but thought to be more likely than not to be recoverable. The conditions they require to have a chance at production are generally at least 50% under current conditions. These reserves can be dependent on further drilling, infrastructural expansion or moderate changes in economic conditions. While not as secure as proved reserves, probable reserves give companies an idea of their potential growth pipeline.
Possible Reserves
Possible reserves are the least certain reserves. They have a lower possibility of being recovered as compared to probable reserves and are often not included in a conservative financial projection. Owing to their uncertainty; possible reserves are usually not factored into the calculation of core valuation.
Understanding Proved Oil and Gas Reserves and Probable Annex
When analysts talk about proved and probable oil and gas reserves, they are most often referring to “2P reserves”, which is a combination of proved (1P) and probable reserves.
2P reserves provide a wider perspective on the resource base of a company. While 1P reserves indicate what is very likely to be produced, 2P reserves include the additional opportunity.
The distinction between them is important for investors to know. In simple terms:
- Proved reserves are a source of baseline security.
- Probable reserves refer to growth potential.
- A balance between the two is an indicator of a healthy risk profile.
Companies with good proven reserves and significant probable reserves often possess both steadfastness and increased capacity.
How Oil and Gas Reserves are Estimated
Reserve estimation is based on a technical process involving geological surveys, imaging of seismics, well testing, and production research.
Data analysed by engineers include information about:
- Rock properties
- Reservoir pressure
- Fluid characteristics
- Production history
These variables are input into simulation models to predict the estimate of how much oil or gas is economically recoverable. Importantly, the estimates for reserves change over time. If the price of oil rises, previously uneconomic resources may become commercially viable resources and increase the reported reserves. On the other hand, plunging prices can be depressing for reserve figures. This dynamic nature is that oil and gas reserves are not fixed numbers – they change based on the market.
The Reserve Replacement Ratio (RRR)
One important figure that investors need to be familiar with is the reserve replacement ratio or RRR. This measures the amount of new production that a company adds in relation to the amount that it produces in a given year.
An RRR greater than 100% indicates the company is replacing more reserves than other reserves it is extracting, which ensures a sustainable situation in the long run. An RRR less than 100% from one year to the next may indicate a dip in the eventual output. When evaluating oil and gas reserves, RRR is helpful as you are trying to understand if a company is maintaining, growing, or shrinking their production base.
Economic Conditions and Reserves Classification
The assumption of the oil price is important to the classification of reserves. A field that is profitable at $80 per barrel may not work at $50 per barrel. Due to the fact that the definition of reserve requires economic recoverability, shifts in commodity prices have a direct effect on reported figures.
Conservative companies regularly follow standardised models of pricing to keep up with the regulatory standards. As an investor, it is important to look into the price assumptions that are made in reserve reports in order to avoid misreading inflated numbers.
Risks Involved with Reserve Estimates
Although reporting on reserves is subject to structured guidelines, there are always assumptions and modelling.
Risks include:
- Geological uncertainty
- Cost overruns
- Technological challenges
- Regulatory days
- Commodity price volatility
Even proved reserves have an element of uncertainty, although substantially less than probable or possible reserves. This recognition of the uncertainty is important so that you do not mistake reserve figures as absolute results.
How to Use Reserve Data to Make Investment Decisions
If you are analyzing an energy company, reserve data should not be considered in isolation.
Instead, you should consider the following:
- Size of proved reserves as compared to annual production
- The ratio of reserves proved to reserves probable
- The historical reserve replacement rate of the company
- Geographic diversification
- Production costs per barrel
Companies possessing high and low cost proved oil reserves in areas with high political stability often offer lower long-term risk profiles.
Incorporating oil and gas reserves analysis into your analysis can help you better discriminate between short-term performance and sustainable value.
Final Thoughts
Oil and gas reserves are not simply technical statistics – the reserves are the basis of future production and revenue for the energy sector. It is important to know the difference between proved, probable and possible reserves, so that you can get a better understanding of risk, growth potential and financial strength.
Proved reserves provide reliability, probable reserves give the expansion potential, and together, they are proved and probable oil and gas reserves analysis. Reserve classification should be known as one of the most important indicators of long-term sustainability in the oil and gas business.
