Exhibit 99.B
 
 RYDER SCOTT COMPANY FAX PETnOlWM CONSULTANTS I I 00 lOUISIANA SUITE 3800 HOUSTON. TEXAS 77002 ·5218
TElEPHONE (713) 651-9191 January 28, 2009 El Paso Production Company EI Paso Tower 1001 Louisiana
Houston, TX 77002 Gentlemen: At your request, we have conducted a reserves audit of the estimates
of the remaining proved reserves attributable to the equity interest of EI Paso Production Company
(EI Paso) in Four Star Oil & Gas, as of December 31, 2008. as prepared by its engineering and
geological staff and based on Securities and Exchange Commission (SEC) guidelines. The properties
that we audited are comprised of 1,56\ reserve determinations and are located in the states of
Alabama. Colorado, New Mexico, Oklahoma and Texas. In our opinion, the overall proved reserves for
the audited properties as estimated by EI Paso are, in the aggregate, reasonable within the
established audit tolerance guidelines of 10 percent as set forth in the Standards Pertaining 10
the Estimating and Auditing of Oil and Gas Reserves Information promulgated by the Society of
Petroleum Engineers. The net reserves attributable to the properties that we audited account for 80
percent of Ihe total net remaining liquid hydrocarbon reserves and 85 percent of the total net
remaining gas reserves. The properties that we audited represent 82 percent of the total proved
discounted future net income based an the unescalated pricing policy of the SEC as taken from
reserve and income projections prepared by EI Paso as of December 31, 2008. EI Paso owns a 48.77
percent equity interest in Four Slar Oil & Gas. The estimated reserves presented in this report are
related to hydrocarbon prices. EJ Paso has informed us that in the preparation of their reserve and
income projections, as of December 31, 2008, they used December 2008 hydrocarbon prices as required
by SEC guidelines; however, actual future prices may vary significantly from December 2008.
Therefore, volumes of reserves actually recovered and the amounts of income actually received may
differ significantly from the estimated quantities presented in this report. The net remaining
reserves as estimated by EI Paso attributable to El Pasos interest in properties that we audited
and the reserves of properties that we did not audit are summarized as follows: SEC CASE Estimated
Net Remaining ReselVes Attributable to the Equity Interest of EI Paso Production Company in Four
Star Oil & Gas As of December 31, 2008 Proved Net Reserves of Properties Audited bv Ryder Scott
OiUCondensate -Barrels Plant Products -Barrels Gas-MMCF Producing Non-Producing Developed 1,795,052
3,285,398 124,781 23,607 923 Undeveloped 47,780 994,140 23.896 Total Proved 1,842,832 4,303,145
149,600 Total Gas Equivalents -MMCFE~ 155,264 1,065 30,147 186,476 1200. S!ll-8TH AVe.\}(. S.W.
CAlGflR fllBtRTAT2P 358 TEL (403) 262-l!799 FAX (403) 262.l!790 621 17THSTRM.SU1E1SSO
OONE/l(OlOMDO 60293-1S01 TEl (303)623-9147 FfIX (303)623-42Sa




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El Paso Production Company January 28. 2009 Page 2 Proved Developed Total Net Reserves
ofProperties Not Audited by Ryder Scott OiLtCondensate -Barrels Plant Products -Barrels Gas-MMCF
Producing 355,683 1,202,175 21,013 Non-Producing 4.749 2,073 Undeveloped 38 8,078 2,978 Proved
355,721 1,215,002 26.062 Total Gas Equivalents -MMCFEe 30,360 2,101 3,025 35,486 Total Net ReselVes
OiVCondensate ~ Barrels Plant Products -Barrels Gas-MMCF 2,150,735 4,487,573 145,794 28,356 2,996
47,818 1,002,218 26,872 2,198,553 5,518,147 175,662 Total Gas Equivalents -MMCFE · 185,624 3,166
33,172 221,962 I bblliquid = 6 MCF gas equivalents liquid hydrocarbons are expressed in standard
42 gallon barrels. AD gas volumes are expressed in millions of cubic feet (MMCF) at the official
temperature and pressure bases of the areas mwhich the gas reserves are located. Reserves Included
In This Report In our opinion, the proved reserves presented in this report comply with SEC
definitions and gUide~nes. as outlined below. SEC Regulation s..X RuJe 4-10 paragraph (a) defines
proved reserves as follows: Proved all and gas reselV8S. Proved oil and gas resel\l9S are the
estimatedquantities ofcrude on. natural gas. and natural gas liquids which geological and
engineering data demonstJate with teasonable certainty to be recoverable in future years from known
reseNoirs under existing economic and operating conditions, i.e.. prices and costs as of the date
the estimate /s mads. Prices include consideration of changes in existing prices provickKI only by
contractus/arrangements, but not on escalations based upon future conditions. (i) Reservoirs are
considered proved if economic producibl7ity is supported by either actual production or conclusive
formation test. The area ofa reservoir consideredproved includes: (A) that portion delineated by
drilling and defined by gas-oi/ and/or oi!·water contacts, ifany; and (8) the immediately adjoining
portions not yet drined. but which can be reasonably judged as economically productive on the basis
of avaUabie geological and engineering data. In the absence of infonnation on fluid contacts, the
lowest known stJvctural occurrence of hydrocatbons controls the lowerproved limit ofthe reservoir.
(il) ReseN&s which can be produced economically through application of improved recovery techniques
(such as nuid injection) are included in the -proved-classification when successful testing by a
pr70t project. or lhe operation of an instaned program /n the ffJS8NOir, provides support for the
engineering analysis on which theprojectorprogram was based. (iii) Estimates ofproved resetYes do
not include the following: RYDEA SCOTT COMPANY PETAOlElJM CONSUlTANTS




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EI Paso Production Company January 28. 2009 Page 3 (A) oil that may become avaUable from known
reservoirs but is classified separately as ·indicated additional reserves ·; (B) crode oil. natural
gas, and natural gas liquids, the recovel} of which is subject to reasonable doubt because of
uncsrtainty as togeology, reseNDircharacteristics. oreconomicfactors: (e)crodeoil,naturalgas,
andnaturalgasliquids,that mayoccurinundriJledprospects:and (0) crude oil, natural gas. and natural
gas liquids, that may be recovered from oil shales, coal, gilsonita and otharsuch sources. Proved
developed all and gas reserves. Proved developed oil and gas reserves are resefV8s that can be
expected to be f9covered through existing wells with existing equipment and operating methods.
Additional oil and gas expected to be obtained through the applicaUon of fluid injec60n or other
improved recoVSI} techniques for supplementing the natural forces and mechanisms ofprimal}
teCOV81} should be included as ·proved developed reserws · only aner testing by 8 pilot project or
after the operation ofan ins/aUed program has confirmed through production response that increased
fBCOV8lY win be achieved. Proved undeveloped reserves. Proved undeveloped oU and gas reserves are
reserves that are expected to be recovered from new wells on undrilled acreage, or from existing
wells when a relatively major expenditure is required for recompletlon. Reserves on undnned
acreage shall be limited to those drilling units offsetting productive units that are reasonably
certain of production when OOed. Proved reseTVBS for other undrined units can be claimed only when
it can be demonstrated With certainty that there is continuity of production from the existing
productive fonnation. Under no circumstances shoutd es/imates for proved undeveloped reserves be
attributable to any acreage for which an application of fluid injecVOn 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 pubished subsequent to the
promu~ationof Regulation S ·X have dealt with matters relating to the application of financial
accounting and disclosure rules tor oil and gas producing activities. In particular, the following
interpretations extracted from Staff Accounting Bulletins set forth the Commission staffs view on
specific questIons pertaining to proved oll 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
(utUte 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 advancfl. In certain Instances, proved reserves may be assigned to
reservoirs on the basis ofa combination ofeJectricaJ and other type logs and cere analyses which
indicate the resetvOirs are analogous to similar reservoirs in the same field which alB producing
or have demonstrated the ability to produce on a fonnation test. (extracted from SA&35) tn
determining whether ·proved undeveloped reserves encompass acreage on which fluid injection (or
other Improved recovelY technique) Is contemplated, Is it appropriate to distinguish between (I)
fluid injection used for pmssum maintenance during the early life of a field and (il) 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 identiflBd in the above question may be
appropriate in a few limited circumstances, such as in the case of certain fields in the North Ssa.
The staff wilt review estimates of proved reselVeS attribu
table to
fluid Injection In the light of the strength of the evkJence presented by the registrant in support
ofa 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 rectJvered in a pfC)C9ssing 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 RYDER SCOTT COIN¥WV PETAOlEUM CONSUlTANTS




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EI Paso Production Company January 28, 2009 Page 4 follow inslroclion (b) of Item 2(b)(3) of
Regulalion S ·K and report such reserves separelely and describe Ihe nature of the ownership,
(extracted from SAB-35) The stsff believBs that since cos/bed methane gas can be /&COvered from
coal in its natural and original location, it should be included in proved reserves, provided that
it complies in all other respects w;th the definition of proved on and gas reserves as speciIied in
Rule 4-10(a)(2) including the requirement/hat methane production be economical at cummt prices,
costs, (net of the tax credit) and existing operating condOions, (exlIBc/ed from SAB-85) Statements
in Staff Accounting Bunetins are not rules or interpretations of the Commission nor ara they
published as bearing the Commissions official approval; they represent interpretations and
practices fonowed by the Division of Corporation Flllance and the Offlce of the Chief Accountant in
administering the disdo5ure requirements altha Federal seauities laws. 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 and reserves assigned to the undeveloped portions of secondary
or tertiary projects which we have been assured will definitely be developed. Audit Procedure and
Opinion As prescribed by the Society of Petrotewn Engineers mParagraph 2.2(f) of the Standards
Pertaining to the Estimating and Auditing of Oil and Gas Reserves Information a reserves aucflt Is
defined as -tr18 process of reviewing certain of the pertinent facts interpreted and assumptions
made that have resuJted in an estimate of reseIVes prepared by others and the rendering of an
opInion about (1) the appropriateness of the methodologies employed, (2) the adequacy and quarrty
of the data relied upon, (3) the depth and thoroughness of the reserves estimation process, (4) the
classification of reserves appropriate to the relevant definitions used, and (5) the reasonableness
of the estimated reserve quantities. In performIng our audit, we have relied upon data furnished by
EI Paso with respect to property interests owned, production and weU tests from examined wells,
historical costs of operation and development. product prices, geological structural and isopach
maps, well logs, core analyses, and pressure measurements. These data were accepted as authentic
and sufficient for determining the reserves unless, during the course of our examination, a matter
of question came to our attention in which case the data were not accepted until all questions were
satisfactory reserved. OUr audit included such tests and procedures as we considered necessary
under the circumstances to render the conclusions set forth herein. In our opinion, EI Pasos
estimates of future reserves for the audited properties were prepared in accordance with generally
accepted petroleum engineering and evaluation principles for the estimation of Mure reserves as set
forth in the Standards Pertaining to the Estimating and Auditing of Oil and Gas Reserves
Information, and we found no bias In the utilization and analysis of data in estimates for these
properties. In general, we were in reasonable agreement with EJ Pasos estimates of remaining
proved reserves for the properties which we audited; however, in certain cases there was more than
an acceptable variance in B Pasos estimates and our estimates due to a difference In
interpretation of data or due to our haVing access to data which were not available to EI Paso when
its reserve estimates were prepared. In these cases, EI Paso revIsed its estimates to conform to
our estimates. As a consequence, it is our opinion that the data presented herein for the
properties that
we audited falrty reflect the estimated net reserves owned by EI Paso, Certain
technical personnel of EI Paso are responsible for the
preparation of reserve estimates on new properties and for the preparation of revised estimates,
when necessary, on old properties. These personnel assembled the necessary data and maintained the
data and wol1c:papers In an orderly manner. We consulted with these technical personnel and had
access to their workpapers and supporting data in the course of our audil AYOER secn COMPANY
PaAOlEUM CONSl..ltJRNTS




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El Paso Production Company January 28. 2009 Page 5 Other Properties Other properties, as used
herein. are those properties of EI Paso which we did not audit. The reserves attributable to the
other properties account for 20 percent of the total net remaining liquid hydrocarbon reserves and
15 percent of the total net remaining gas reserves. The same technical personnel of EI Paso
prepared the reserve estimates for the properties that we audited and for the other properties.
Reserves Estimates The reserves for the properties that we audited were estimated by perlormance
methods or the volumetric method. The reserves estimates by the perlormance method utilized
extrapolations of various historical data in those cases where such data were definitive. Reserves
were estimated by the volumetric method in those cases where there were inadequate historical data
to establish a definitive trend or where the use of production performance dala as a basis for the
reserves estimates was considered to be inappropriate and the volumetric data were adequate for a
reasonable estimate. The reserves presented herein. as estimated by EI Paso and audited by us, are
estimates only and should not be construed as being exact quantities. Moreover. estimates of
reserves may increase or decrease as a result of future operations. General In general, the reserve
estimates for the properties that we audited are based on data available through December, 2008.
Gas imbalances, if any. were not taken into account in the gas reserve estimates audited. Neither
we nor any or our employees have any interest in the sUbject properties. and neither the employment
to do this work nor the compensation is contingent on our estimales of reserves for the properties
which were audited. This report was prepared for the exclusive use of EI Paso Production Company.
The data and wori< papers 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. ~:2~ Senior Vice President JDW/sm RYDER SC011 COMPAN PETAOlfUM
(ONSlAffiNT$




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~YDER SCOTT COMPANY fAI(113)6~l-o~9 TD,hJI ?IIIUlTAHU 1100 lOUlSIANf1 SUITE 3800 HOUSTON.
TEmS 77002 ·5218 TelEPHONE (713) 651 ·9191 January 29, 2009 Ryder Scott Company, L.P. and the
followin9 identified employee in this affidavit affirm that they do not have any ownership interest
in EI Paso Corporations 2008 reviewed properties. They also affirm that neither their employment
to make the 2008 reserve estimate study nor their compensation for the reserve estimate study for
EI Paso was contingent on their estimates of reserves from the reviewed properties. RYDER scon
COMPANY, L.P. George F.,gtmes, P. Geo!. Managing Senior Vice President 1200. S30 ·aTHfM:IA.Il:. SOW.
CAlGMY. AlBERTA lWl!>8 TEl (403) i61!.2700 ffIX (403)1!62.1!79Q ilil 17TH STREET, surre lS50
OEllVffi. COlOAAOO ll(}2q3 ·1501 TH (303)623-9147 fAX (30316113-4253