<TABLE>
<CAPTION>

                                                                      EXHIBIT 99


                       [LETTERHEAD OF RYDER SCOTT COMPANY]




                                      March 28, 2003




Chaparral Resources, Inc.
16945 North Chase Drive
Suite 1620
Houston, Texas 77060

Gentlemen:

     At your request, we have prepared an estimate of the reserves, future
production and income attributable to leasehold interests of Karakuduk-Munay,
JSC (KKM) as of December 31, 2002. The subject property is located in the
Karakuduk field in the Republic of Kazakhstan. The income data were estimated
using the Securities and Exchange Commission (SEC) requirements for future price
and cost parameters.

     The estimated reserves and future income amounts presented in this report
are related to hydrocarbon prices. Hydrocarbon prices in effect at December 31,
2002 were used in the preparation of this report as required by SEC rules;
however, actual future prices may vary significantly from December 31, 2002
prices. Therefore, volumes of reserves actually recovered and amounts of income
actually received may differ significantly from the estimated quantities
presented in this report. The results of this study are summarized below.


                                 SEC PARAMETERS
                      Estimated Net Reserve and Income Data
                         Certain Leasehold Interests of
                              Karakuduk-Munay, JSC
                             As of December 31, 2002

                                                  Proved
                             -----------------------------------------------------
                                      Developed
                             --------------------------                  Total
                              Producing   Non-Producing  Undeveloped     Proved
                             -----------  -------------  -----------   -----------
<S>                            <C>           <C>          <C>           <C>
Net Remaining Reserves
----------------------
  Oil/Condensate - Barrels     3,413,796     5,907,165    12,534,259    21,855,220

Income Data - M$
----------------
  Future Gross Revenue       $    71,894   $   124,405   $   263,971   $   460,271
  Deductions                      29,903        51,082       135,769       216,755
                             -----------   -----------   -----------   -----------
  Future Net Income (FNI)    $    41,991   $    73,323   $   128,202   $   243,516

  Discounted FNI @ 10%       $    35,492   $    40,519   $    69,871   $   145,881

</TABLE>
<PAGE>

Chaparral Resources, Inc.
March 28, 2003
Page 2

                                                     Probable
                                    --------------------------------------------
                                      Developed                        Total
                                    Non-Producing    Undeveloped      Probable
                                    -------------    -----------     -----------
Net Remaining Reserves
----------------------
  Oil/Condensate - Barrels             1,276,417      39,884,362      41,160,779

Income Date - M$
----------------
  Future Gross Revenue               $    26,881     $   839,965     $   866,846
  Deductions                               9,444         221,594         231,038
                                     -----------     -----------     -----------
  Future Net Income (FNI)            $    17,437     $   618,371     $   635,808

  Discounted FNI @ 10%               $     4,507     $   211,052     $   215,559


     Liquid hydrocarbons are expressed in standard 42 gallon barrels.

     The deductions from future gross revenue after royalty comprise the normal
direct costs of operating the wells, Naftex Commission, export tariff, local
sales tariff, transportation costs, recompletion costs, development costs, and
certain abandonment costs. The future net income is before the deduction of
government taxes and general administrative overhead, and has not been adjusted
for outstanding loans that may exist nor does it include any adjustment for cash
on hand or undistributed income. Liquid hydrocarbon reserves account for 100
percent of total future gross revenue from proved reserves. Gas reserves were
not included at Chaparral Resources, Inc. (Chaparral) request, due to
uncertainties in gas sales stability, market conditions, and a potential gas
re-injection program.

     The discounted future net income shown above was calculated using a
discount rate of 10 percent per annum compounded monthly. Future net income was
discounted at four other discount rates which were also compounded monthly.
These results are shown on each estimated projection of future production and
income presented in a later section of this report and in summary form below.

                                    Discounted Future Net Income - M$
                                         As of January 1, 2002
                                    ---------------------------------
       Discount Rate                   Total               Total
          Percent                      Proved             Probable
       -------------                  --------            --------

             8                        $160,565            $265,491
            12                        $132,973            $175,622
            15                        $116,415            $129,896
            20                        $ 94,704            $ 79,539

     The results shown above are presented for your information and should not
be construed as our estimate of fair market value.


Reserves Included in This Report

     The proved reserves included herein conform to the definition as set forth
in the Securities and Exchange Commission's Regulation S-X Part 210.4-10 (a) as
clarified by subsequent Commission Staff Accounting Bulletins. The probable
reserves included herein conform to definitions of probable reserves approved by
the SPE/WPC using the deterministic methodology. The definitions of proved and
probable reserves are included under the tab "Petroleum Reserves Definitions" in
this report.

<PAGE>

Chaparral Resources, Inc.
March 28, 2003
Page 3


     We have included probable reserves and income in this report at the request
of Chaparral. These data are for Chaparral's information only, and should not be
included in reports to the SEC according to the SEC disclosure specifications.
The probable reserves are less certain to be recovered than the proved reserves.
The reserves and income quantities attributable to the different reserve
classifications that are included herein have not been adjusted to reflect the
varying degrees of risk associated with them and thus are not comparable.

     Because of the direct relationship between volumes of proved undeveloped
reserves and development plans, we include in the proved undeveloped category
only reserves assigned to undeveloped locations that we have been assured will
definitely be drilled.

     All proved and probable reserves incorporated herein are based on the
current definitions of the field limits. KKM has an active exploratory and
development drilling program that may result in the discovery or
reclassification of additional volumes.

     The various reserve status categories are defined under the tab "Petroleum
Reserves Definitions" in this report. The developed non-producing reserves
included herein are comprised of the shut-in and behind-pipe categories.


Estimates of Reserves

     In general, the reserves included herein were estimated by a combination of
the volumetric and performance methods. The performance method by itself was
applied only in cases where the historically established decline trend was
definitive. Reserves were estimated by the volumetric method in those cases
where there were inadequate historical performance data to establish a
definitive trend or where the exclusive use of production performance data as a
basis for the reserve estimates was considered to be inappropriate.

     Proved and probable reserves attributed to primary recovery by the
volumetric method were determined by assigning a 13.5 percent primary recovery
efficiency of original oil in place to an estimated drainage area. The 13.5
percent primary recovery efficiency estimate is based on a reservoir simulation
model study of the J-1 and J-2 sands. This represents a 2.5 percent reduction in
primary recovery efficiency from last year's 16.0 percent. The reservoir
simulation model showed that the earlier estimate of 16.0 percent is valid for
existing wells, but that new wells will experience somewhat lower recovery due
to lower pressure. The same ultimate recovery efficiency under primary depletion
was also assigned to all other sands. An average drainage area per well was
determined for each reservoir based on the estimated drainage area of existing
producing wells. For the J-4, J-6A, J-6B, and J-10 zones, an average ultimate
drainage area of 180 acres was estimated. An average ultimate drainage area of
90 acres per well was estimated for reservoirs J-2, J-7, and J-8/J-9. The
original development plan for the Karakuduk field proposed 90-acre well spacing.
Our review of the most recent performance data indicates that 150 to 180-acre
well spacing may be more appropriate for the better sands. This was confirmed
with the reservoir simulation model which indicates average drainage area of 150
acres per well for the J-1 reservoir. Additional studies are planned to
investigate benefits from horizontal wells.

<PAGE>

Chaparral Resources, Inc.
March 28, 2003
Page 4


     The average expected recovery of all producers (existing and future) in the
J-1 sand is 341,000 STB/well. The average expected recovery of all existing J-1
producers is 352,000 STB/well. The expected average recovery of all future
proved undeveloped locations in the J-1 sand is 307,000 STB/well. As discussed
earlier, new wells are expected to recover less during primary depletion due to
lower reservoir pressure.

     Proved undeveloped reserves in all other sands were assigned to locations
within one well spacing (as established by performance to date) from proved
producing, behind pipe, or shut-in locations.

     In general, proved behind pipe reserves were assigned to sands (in existing
wellbores) with a positive oil test or to sands with a good log signature that
were inside the area of one well spacing from proved producing or shut-in
locations. Proved behind pipe reserves were also assigned to estimated
incremental reserves in producing or shut-in wells that require a pump or a
hydraulic fracture treatment.

     In the J-1 sand, probable undeveloped locations were assigned to wells
contained within the area designated as probable oil in place. In all other
sands probable undeveloped and behind pipe locations were assigned to locations
within three well spacings but outside one well spacing from proved producing,
behind pipe, or shut-in locations.

     The reserves attributed to the waterflood project at the Karakuduk field
were classified as probable undeveloped. Incremental reserves from the
waterflood were estimated at 16.5 percent of original oil in place, in addition
to primary recovery, based on results from a J-1/J-2 reservoir simulation model
constructed in 2002. The total primary plus secondary recovery is estimated at
30.0 percent of original oil in place. The 30.0 percent primary plus secondary
recovery efficiency is based on the assumption of depleting the reservoir under
primary recovery to a pressure near the bubble point such that recovery under
depletion drive is optimized. Based on this assumption, water injection to
commence the waterflood is expected to begin towards the end of 2003.

     The economic evaluation of possible reserves was not included in this
report. We did, however, complete a preliminary analysis of volumes that would
be considered possible based on currently available data. Possible recoverable
volumes identified by our firm amount to 38.3 million stock tank barrels
(MMSTB), and are comprised of the following:

     1.   Volumes outside three well spacings but inside the currently defined
          limits of the field (27.6 MMSTB based on a 30.0 percent primary plus
          secondary recovery efficiency).

     2.   Volumes that are contained within the probable oil region but were not
          included as probable reserves due to uncertainty in pay thickness and
          distribution (10.7 MMSTB based on a 30.0 percent primary plus
          secondary recovery efficiency).

     Additional potential beyond possible reserves may exist outside the
currently defined limits, especially in the J-1 sand. New delineation or
exploratory drilling may result in reclassification or reserve additions in the
future. Potential for reserve additions may also be realized in sands below the
J-10 sand. Well No. 20 showed a zone that is approximately 150 feet thick with a
good log response in the J-13 sand, however, this zone has not yet been tested.
Further potential may also be realized from re-injection of produced gas at the
top of the reservoir for pressure maintenance and/or a double displacement
process (peripheral water and up-dip gas injection). No analysis has been
performed by our firm at this time to quantify any of these potentials.

<PAGE>

Chaparral Resources, Inc.
March 28, 2003
Page 5


     The reserves included in this report are estimates only and should not be
construed as being exact quantities. They may or may not be actually recovered,
and if recovered, the revenues therefrom and the actual costs related thereto
could be more or less than the estimated amounts. Moreover, estimates of
reserves may increase or decrease as a result of future operations.


Future Production Rates

     Initial production rates are based on the current producing rates for those
wells now on production. If a decline trend has been established, this trend was
used as the basis for estimating future production rates. Test data and other
related information were used to estimate the anticipated initial production
rates for those wells or locations which are not currently producing. For
reserves not yet on production, sales were estimated to commence at an
anticipated date furnished by KKM. As of the time of this report there are a
total of 36 existing wells of which 29 were producing (Wells 1, 4, 5, 6, 7, 8,
10, 11, 12, 13, 21, 91, 101, 102, 136, 138, 156, 170, 173, 176, 178, 180, 181,
182, 187, 188, 191, 194, and 198) and 7 were shut-in (Wells 20, 22, 88, 103,
158, 179, and 186). Several sands stratigraphically below the J-1 reservoir have
been produced for short periods of time, in order to establish potential
production profiles. Many of these stratigraphically lower sands have since been
shut-in in order to exploit the J-1 sand, but will be returned to production,
once the prolific J-1 sand has been depleted. After the J-1 sand is depleted,
the general procedure will be to complete and produce each of the remaining
sands, starting with the stratigraphically lowest, and moving up the wellbore.

     Future incremental rates attributable to the waterflood were estimated to
begin in year 2004. Development costs and injection for the waterflood are
expected to begin in year 2003. The rate profile was based on results from a
J-1/J-2 reservoir simulation model and analogy assumptions for the lower sands.

     The future production rates from wells now on production may be more or
less than estimated because of changes in market conditions or allowables set by
regulatory bodies. Wells or locations which are not currently producing may
start producing earlier or later than anticipated in our estimates of their
future production rates.


Hydrocarbon Prices

     Chaparral furnished us with hydrocarbon prices in effect at December 31,
2002.

     In accordance with FASB Statement No. 69, December 31, 2002 market prices
were determined using the daily oil price or daily gas sales price ("spot
price") adjusted for oilfield or gas gathering hub and wellhead price
differences (e.g. grade and transportation) as appropriate. Also in accordance
with SEC and FASB specifications, changes in market prices subsequent to
December 31, 2002 were not considered in this report.

     Chaparral advised us that KKM has been required to sell a portion of their
production on the domestic Kazakhstan market and that for the purpose of this
report, KKM will export 85.0 percent of their crude production and sell 15.0
percent on the domestic market.

<PAGE>

Chaparral Resources, Inc.
March 28, 2003
Page 6


Costs

     Operating costs for the leases and wells in this report are based on the
operating expense reports of Chaparral and include only those costs directly
applicable to the leases or wells. No deduction was made for indirect costs such
as general administration and overhead expenses, loan repayments, interest
expenses, and exploration and development prepayments that are not charged
directly to the leases or wells.

     Proven operating costs (as provided by Chaparral) were combined with proven
facility development cost (as provided by Chaparral) and 100.0 percent allocated
to proven reserve category summaries (e.g. proved producing summary, proved
behind pipe summary, and proved undeveloped summary) based on future net income
rather than to individual leases. The resulting cost summaries for the three
proven reserve categories can be found in Tables 138 through 140.

     Probable operating costs (as provided by Chaparral) were combined with
proven facility development cost (as provided by Chaparral) and 100.0 percent
allocated to probable reserve category summaries (e.g. probable behind pipe
summary, and probable undeveloped summary) based on future net income rather
than to individual leases. The resulting cost summaries for the three proven
reserve categories can be found in Tables 141 and 142.

     Development costs (drilling, completions, pumps, and hydraulic fractures)
were furnished to us by Chaparral and are based on authorizations for
expenditure for the proposed work or actual costs for similar projects. The
estimated net cost of abandonment after salvage was included at $80,000 per
well. The estimates of the net abandonment costs furnished by Chaparral were
accepted without independent verification.

     Current costs were held constant throughout the life of the properties.


General

     Table A presents a one line summary of proved reserve and income data for
each of the subject properties which are ranked according to their future net
income discounted at 10 percent per year. Table B presents a one line summary of
gross and net reserves and income data for each of the subject properties. Table
C presents a one line summary of initial basic data for each of the subject
properties. Tables 1 through 142 present our estimated projection of production
and income by years beginning December 31, 2002, by reserve category and well.

     The estimates of reserves presented herein are based upon a detailed study
of the properties in which Chaparral owns an interest; however, we have not made
any field examination of the properties. No consideration was given in this
report to potential environmental liabilities which may exist nor were any costs
included for potential liability to restore and clean up damages, if any, caused
by past operating practices. Chaparral has informed us that they have furnished
us all of the accounts, records, geological and engineering data, and reports
and other data required for this investigation. The ownership interests, prices,
and other data furnished by Chaparral were accepted without independent
verification. The estimates presented in this report are based on data available
through December 31, 2002.

     Neither we nor any of our employees have any interest in the subject
properties and neither the employment to make this study nor the compensation is
contingent on our estimates of reserves and future income for the subject
properties.

<PAGE>

Chaparral Resources, Inc.
March 28, 2003
Page 7


     This report was prepared for the exclusive use and sole benefit of
Chaparral. The data, work papers, and maps used in the preparation of this
report are available for examination by authorized parties in our offices.
Please contact us if we can be of further service.

                                         Very truly yours,

                                         RYDER SCOTT COMPANY, L.P.


                                         /s/ Thomas Wagenhofer, P.E.
                                         ---------------------------
                                         Thomas Wagenhofer, P.E.
                                         Petroleum Engineer

TW/sw



Reviewed by:


/s/ Dean Rietz, P.E.
--------------------
Dean Rietz, P.E.
Vice President - Manager Reservoir Simulation

<PAGE>

                            Chaparral Resources, Inc.









                                    Estimated

                           Future Reserves and Income

                             Attributable to Certain

                             Leasehold Interests of

                              Karakuduk-Munay, JSC







                                 SEC Parameters







                                      As of

                                December 31, 2002

<PAGE>

                         PETROLEUM RESERVES DEFINITIONS

                       SECURITIES AND EXCHANGE COMMISSION



INTRODUCTION
------------

     Reserves are those quantities of petroleum which are anticipated to be
commercially recovered from known accumulations from a given date forward. All
reserve estimates involve some degree of uncertainty. The uncertainty depends
chiefly on the amount of reliable geologic and engineering data available at the
time of the estimate and the interpretation of these data. The relative degree
of uncertainty may be conveyed by placing reserves into one of two principal
classifications, either proved or unproved. Unproved reserves are less certain
to be recovered than proved reserves and may be further sub-classified as
probable and possible reserves to denote progressively increasing uncertainty in
their recoverability. It should be noted that Securities and Exchange Commission
Regulation S-K prohibits the disclosure of estimated quantities of probable or
possible reserves of oil and gas and any estimated value thereof in any
documents publicly filed with the Commission.

     Reserves estimates will generally be revised as additional geologic or
engineering data become available or as economic conditions change. Reserves do
not include quantities of petroleum being held in inventory, and may be reduced
for usage or processing losses if required for financial reporting.

     Reserves may be attributed to either natural energy or improved recovery
methods. Improved recovery methods include all methods for supplementing natural
energy or altering natural forces in the reservoir to increase ultimate
recovery. Examples of such methods are pressure maintenance, cycling,
waterflooding, thermal methods, chemical flooding, and the use of miscible and
immiscible displacement fluids. Other improved recovery methods may be developed
in the future as petroleum technology continues to evolve.


PROVED RESERVES (SEC DEFINITIONS)
---------------------------------

     Securities and Exchange Commission Regulation S-X Rule 4-10 paragraph (a)
defines proved reserves as follows:

Proved oil and gas reserves. Proved oil and gas reserves are the estimated
quantities of crude oil, natural gas, and natural gas liquids which geological
and engineering data demonstrate with reasonable certainty to be recoverable in
future years from known reservoirs under existing economic and operating
conditions, i.e., prices and costs as of the date the estimate is made. Prices
include consideration of changes in existing prices provided only by contractual
arrangements, but not on escalations based upon future conditions.

     (i) Reservoirs are considered proved if economic producibility is supported
     by either actual production or conclusive formation test. The area of a
     reservoir considered proved includes:

          (A) that portion delineated by drilling and defined by gas-oil and/or
          oil-water contacts, if any; and

          (B) the immediately adjoining portions not yet drilled, but which can
          be reasonably judged as economically productive on the basis of
          available geological and engineering data. In the absence of
          information on fluid contacts, the lowest known structural occurrence
          of hydrocarbons controls the lower proved limit of the reservoir.

<PAGE>

PETROLEUM RESERVES DEFINITIONS
Page 2


     (ii) Reserves which can be produced economically through application of
     improved recovery techniques (such as fluid injection) are included in the
     "proved" classification when successful testing by a pilot project, or the
     operation of an installed program in the reservoir, provides support for
     the engineering analysis on which the project or program was based.

     (iii) Estimates of proved reserves do not include the following:

          (A) oil that may become available from known reservoirs but is
          classified separately as "indicated additional reserves";

          (B) crude oil, natural gas, and natural gas liquids, the recovery of
          which is subject to reasonable doubt because of uncertainty as to
          geology, reservoir characteristics, or economic factors;

          (C) crude oil, natural gas, and natural gas liquids, that may occur in
          undrilled prospects; and

          (D) crude oil, natural gas, and natural gas liquids, that may be
          recovered from oil shales, coal, gilsonite and other such sources.

Proved developed oil and gas reserves. Proved developed oil and gas reserves are
reserves that can be expected to be recovered through existing wells with
existing equipment and operating methods. Additional oil and gas expected to be
obtained through the application of fluid injection or other improved recovery
techniques for supplementing the natural forces and mechanisms of primary
recovery should be included as "proved developed reserves" only after testing by
a pilot project or after the operation of an installed program has confirmed
through production response that increased recovery will be achieved.

Proved undeveloped reserves. Proved undeveloped oil and gas reserves are
reserves that are expected to be recovered from new wells on undrilled acreage,
or from existing wells where a relatively major expenditure is required for
recompletion. Reserves on undrilled acreage shall be limited to those drilling
units offsetting productive units that are reasonably certain of production when
drilled. Proved reserves for other undrilled units can be claimed only where it
can be demonstrated with certainty that there is continuity of production from
the existing productive formation. Under no circumstances should estimates for
proved undeveloped reserves be attributable to any acreage for which an
application of fluid injection or other improved recovery technique is
contemplated, unless such techniques have been proved effective by actual tests
in the area and in the same reservoir.

     Certain Staff Accounting Bulletins published subsequent to the promulgation
of Regulation S-X have dealt with matters relating to the application of
financial accounting and disclosure rules for oil and gas producing activities.
In particular, the following interpretations extracted from Staff Accounting
Bulletins set forth the Commission staff's view on specific questions pertaining
to proved oil and gas reserves.

     Economic producibility of estimated proved reserves can be supported to the
satisfaction of the Office of Engineering if geological and engineering data
demonstrate with reasonable certainty that those reserves can be recovered in
future years under existing economic and operating conditions. The relative
importance of the many pieces of geological and engineering data which should be
evaluated when classifying reserves cannot be identified in advance. In certain
instances, proved reserves may be assigned to reservoirs on the basis of a
combination of electrical and other type logs and core analyses which indicate
the reservoirs are analogous to similar reservoirs in the same field which are
producing or have demonstrated the ability to produce on a formation test.
(extracted from SAB-35)

<PAGE>

PETROLEUM RESERVES DEFINITIONS
Page 3


     In determining whether "proved undeveloped reserves" encompass acreage on
which fluid injection (or other improved recovery technique) is contemplated, is
it appropriate to distinguish between (i) fluid injection used for pressure
maintenance during the early life of a field and (ii) fluid injection used to
effect secondary recovery when a field is in the late stages of depletion? ...
The Office of Engineering believes that the distinction identified in the above
question may be appropriate in a few limited circumstances, such as in the case
of certain fields in the North Sea. The staff will review estimates of proved
reserves attributable to fluid injection in the light of the strength of the
evidence presented by the registrant in support of a contention that enhanced
recovery will be achieved. (extracted from SAB-35)

     Companies should report reserves of natural gas liquids which are net to
their leasehold interest, i.e., that portion recovered in a processing plant and
allocated to the leasehold interest. It may be appropriate in the case of
natural gas liquids not clearly attributable to leasehold interests ownership to
follow instruction (b) of Item 2(b)(3) of Regulation S-K and report such
reserves separately and describe the nature of the ownership. (extracted from
SAB-35)

     The staff believes that since coalbed methane gas can be recovered from
coal in its natural and original location, it should be included in proved
reserves, provided that it complies in all other respects with the definition of
proved oil and gas reserves as specified in Rule 4-10(a)(2) including the
requirement that methane production be economical at current prices, costs, (net
of the tax credit) and existing operating conditions. (extracted from SAB-85)

     Statements in Staff Accounting Bulletins are not rules or interpretations
of the Commission nor are they published as bearing the Commission's official
approval; they represent interpretations and practices followed by the Division
of Corporation Finance and the Office of the Chief Accountant in administering
the disclosure requirements of the Federal securities laws.


SUB-CATEGORIZATION OF DEVELOPED RESERVES (SPE/WPC DEFINITIONS)
--------------------------------------------------------------

     In accordance with guidelines adopted by the Society of Petroleum Engineers
(SPE) and the World Petroleum Congress (WPC), developed reserves may be
sub-categorized as producing or non-producing.

Producing. Reserves sub-categorized as producing are expected to be recovered
from completion intervals which are open and producing at the time of the
estimate. Improved recovery reserves are considered producing only after the
improved recovery project is in operation.

Non-Producing. Reserves sub-categorized as non-producing include shut-in and
behind pipe reserves. Shut-in reserves are expected to be recovered from (1)
completion intervals which are open at the time of the estimate but which have
not started producing, (2) wells which were shut-in awaiting pipeline
connections or as a result of a market interruption, or (3) wells not capable of
production for mechanical reasons. Behind pipe reserves are expected to be
recovered from zones in existing wells, which will require additional completion
work or future recompletion prior to the start of production.

<PAGE>

PETROLEUM RESERVES DEFINITIONS
Page 4


UNPROVED RESERVES (SPE/WPC DEFINITIONS)
---------------------------------------

     Unproved reserves are based on geologic and/or engineering data similar to
that used in estimates of proved reserves; but technical, contractual, economic,
or regulatory uncertainties preclude such reserves being classified as proved.
Unproved reserves may be further classified as probable reserves and possible
reserves.

     Unproved reserves may be estimated assuming future economic conditions
different from those prevailing at the time of the estimate. The effect of
possible future improvements in economic conditions and technological
developments can be expressed by allocating appropriate quantities of reserves
to the probable and possible classifications.

Probable Reserves. Probable reserves are those unproved reserves which analysis
of geological and engineering data suggests are more likely than not to be
recoverable. In this context, when probabilistic methods are used, there should
be at least a 50 percent probability that the quantities actually recovered will
equal or exceed the sum of estimated proved plus probable reserves.

     In general, probable reserves may include (1) reserves anticipated to be
proved by normal step-out drilling where sub-surface control is inadequate to
classify these reserves as proved, (2) reserves in formations that appear to be
productive based on well log characteristics but lack core data or definitive
tests and which are not analogous to producing or proved reserves in the area,
(3) incremental reserves attributable to infill drilling that could have been
classified as proved if closer statutory spacing had been approved at the time
of the estimate, (4) reserves attributable to improved recovery methods that
have been established by repeated commercially successful applications when (a)
a project or pilot is planned but not in operation and (b) rock, fluid, and
reservoir characteristics appear favorable for commercial application, (5)
reserves in an area of the formation that appears to be separated from the
proved area by faulting and the geologic interpretation indicates the subject
area is structurally higher than the proved area, (6) reserves attributable to a
future workover, treatment, re-treatment, change of equipment, or other
mechanical procedures, where such procedure has not been proved successful in
wells which exhibit similar behavior in analogous reservoirs, and (7)
incremental reserves in proved reservoirs where an alternative interpretation of
performance or volumetric data indicates more reserves than can be classified as
proved.