This post is a
summary of a post on the RBN Energy Blog by Nicholas Cacchione. I don’t have
much familiarity with or knowledge of this subject. He first notes that when
comparing different oil & gas exploration and production (E&P)
companies, one might compare their annual reports. However, this is complicated
by the fact that there are two differing accounting methods generally used to
value the companies. He compares the two methods: Full Cost (FC) and Successful
Efforts (SE), to different tax accounting methods approved by the IRS. The goal
for those comparing companies is to get an accurate idea of the real value of
the company. Such valuations can inform possible merger and acquisition
decisions.
He notes that while both methods
are permitted under U.S. Generally Accepted Accounting Principles (GAAP), they
offer different opinions, particularly of exploration successes and failures.
He also explains how methods used changed after the shale revolution, where
shale is a “resource play” tapping a continuously present, repeatable resource,
while mainly vertical pre-shale wells had significant dry hole risks not
encountered in shale drilling.
“These differences influence reported earnings, asset
values, depreciation and depletion rates, impairment behavior and, ultimately,
how companies are perceived by the market. For decades, FC and SE accounting
methodologies were viewed largely through the lens of conventional exploration.
In that Pre-Shale Era, dry holes were common, exploration risk was high, and
accounting methodology played a major role in determining financial results. FC
tended to smooth results by spreading failures across large cost pools, while
SE forced companies to recognize losses immediately.”
“Today, the most important differences between FC and SE
appear in impairment timing, depreciation profiles, reserve revisions, and the
way capital costs are embedded in balance sheets over time. However, it is
important to recognize that despite whichever accounting methodology a company
subscribes to, cash flow and cash flow-related metrics will still tell the
economic truth about a company’s financial fortunes.”
Pre-shale oil & gas was high
risk and high cost. Shale drilling is low risk and high cost. The Successful
Efforts (SE) method ensures “project-level accountability and rapid
recognition of failure.” This method is transparent and conservative. The
Full Cost (FC) method does not operate at the project level, but pools
capitalized exploration and development costs into larger portfolios, typically
by country.
“Proponents of FC argue that this approach better
reflects the long-term economics of resource development. Individual failures
are expected to be offset by future discoveries, and capitalizing costs smooths
earnings over time. In their view, expensing dry holes immediately creates
excessive volatility that does not reflect underlying business value.”
He gives some history of these
methods. In the 1960s and 70s they were hotly debated. Large integrated oil
companies, the “majors,” generally favored SE, while smaller independent
producers often preferred FC. FC serves to reduce short-term earnings
volatility and enable better access to financing.
As noted, shale drilling brought
repeatability and is largely seen as developmental drilling rather than
exploratory drilling. The geologic risks are much lower with shale. Shale also
benefits, he notes by the density of drilling, which provides much more
geological data and information, which further lowers risks.
The graph below depicts different
companies and the accounting method used alongside capitalized costs. Those in
red use FC and those in black use SE.
He notes that in the Shale Era,
what has changed mainly is how impairments, or cost write-downs, are accounted.
He explains that the Securities and Exchange Commission (SEC) requires the
“full cost ceiling test” to limit excessive asset capitalization under FC
accounting.
“A ceiling test write-down occurs when a FC company’s
net capitalized oil and gas costs exceed the present value of its proved
reserves (PV-10), requiring the excess to be written off immediately. These
write-downs are often triggered by lower commodity prices or reserve revisions
rather than changes in underlying operations.”
He suggests that SE accounting is
more accurate in the sense that it flushes out failures more quickly with the
resultant asset valuations being more accurate. The implication is that
delaying impairments can be deceiving. He explains that SE accounting is
especially more accurate in that asset valuations will better match inventory
quality. This is especially important for maturing shale plays.
“In mature shale plays — where core inventory is
gradually depleted and development moves outward — this distinction becomes
increasingly important. Companies with significant net capitalized costs may
appear well-capitalized while facing deteriorating drilling economics.”
On the other hand, companies
involved in exploratory drilling projects, such as those in the Gulf and in
offshore plays around the world, must invest large amounts of money in projects
that take years to develop. For those companies, FC accounting is most apt.
Below, he reiterates that
accounting method differences mainly affect the timing of expense recognition
and that cash flow is the best indicator of financial performance.
“Because accounting policy primarily affects the timing
of expense recognition rather than underlying economics, cash flow remains the
most reliable indicator of performance. Investors and analysts evaluating
upstream companies should emphasize operating and free cash flow, reinvestment
rates, finding-and-development (F&D) costs, reserve replacement efficiency,
payout ratios and capital returns. These measures are less distorted by
accounting treatment and more closely reflect economic reality.”
The table below compares the
differences between FC and SE accounting in a hypothetical scenario. The result
is mainly a difference in profit declared due to the difference in impairment
timings. Note that cash flow is the same in both scenarios.
“Shale development narrowed the most visible historical
differences between FC and SE by reducing traditional dry-hole risk, but it did
not eliminate the importance of accounting methodology. Instead, it shifted the
battleground toward impairment timing, DD&A profiles, reserve revisions,
and the accumulation of embedded capital on balance sheets.”
“Accounting determines when results are recognized, but
cash flow determines whether value is created. In the end, cash flow — not
accounting methodology — is the only true measure of success or failure in the
upstream oil and gas business.”
Thus, cash flow is king. I am glad
to have learned a little about this topic. The author notes plans for RBN
Energy to augment its reporting of year-end reserve reconciliations in future
blogs based on accounting methods.
References:
You Go
Your Way, I’ll Go Mine – Why Accounting Methods Matter. (No, Seriously, You
Gotta Read This). Nicholas Cacchione. RBN Energy. Blog. February 26, 2026. You
Go Your Way, I’ll Go Mine – Why Accounting Methods Matter. (No, Seriously, You
Gotta Read This) | RBN Energy




















