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GeoResources, Inc.

Oil & Gas Exploration and Production

October 30, 2007

CORPORATE OVERVIEW

FORWARD-LOOKING STATEMENTS

Information herein contains forward-looking statements that involve significant risks and uncertainties,
including our need to replace production and acquire or develop additional oil and gas reserves,
intense competition in the oil and gas industry, our dependence on our management, volatile oil and
gas prices, costs associated with hedging activities and uncertainties of our oil and gas reserve
estimates. In addition, all statements or estimates made by the company, other than statements of
historical fact, related to matters that may or will occur in the future are forward-looking statements.

Readers are encouraged to read the December 31, 2006 Annual Report on Form 10-KSB, the March
31, 2007 and the June 30, 2007 quarterly reports on Form 10-QSB, and the proxy statement dated
February 23, 2007 and any and all other relevant documents filed with the SEC regarding information
about GeoResources for meangingful cautionary language in respect of the forward-looking statements
herein. Interested persons are able to obtain free copies of filings containing information about
GeoResources, without charge, at the SEC’s Internet site (http://www.sec.gov).

THERE IS NO DUTY TO UPDATE THE STATEMENTS HEREIN.

COMPANY PROFILE

GeoResources, Inc.

NASDAQ: “GEOI”

(unaudited estimates at October 30, 2007)

• $8.0 Million cash

• 14.8 MMboe (excluding partnership)

• 3,400 Boepd (excluding partnership)

•$96.0 million debt

• $200 million bank facility

• $110 million borrowing base

• 14.7 million shares outstanding

• 5.1 million shares in public float

• Enterprise Value $230 million(1)

(1) Enterprise Value calculated as market capitalization plus debt, minus cash and cash equivalents

2007 MAJOR EVENTS

• Merger

• Change of management

• Increased capitalization and operations

• Increased market cap four-fold

• Acquisition of Austin Chalk properties

•Formation of partnership

•Expanded acreage inventory

•Implemented drilling and development program

•October 2007 acquisition doubles reserves and
production

2007 MERGER

GeoResources, Inc. is a NASDAQ listed public
company based in Houston, TX. The company was
formerly based in Williston, ND and operated oil and
gas properties in the Williston Basin. The merger with
Southern Bay Oil & Gas, LP and Chandler Energy,
LLC was completed in April, 2007.

See www.georesourcesinc.com

Southern Bay Oil & Gas, LP was a private limited
partnership based in Houston, TX. Southern Bay’s
assets include fields in South Texas and Louisiana.

Chandler Energy, LLC was a privately owned
company based in Denver, CO. Chandler’s assets
include fields in Colorado, Utah, Montana, and
Michigan.

April 2007

MERGER PARTICIPANTS

GeoResources, Inc.

NASDAQ: “GEOI”

26.5% Ownership

of Merged Entities

Chandler Energy, LLC

et al

16.7% Ownership

of Merged Entities

Southern Bay

Oil & Gas, LP

56.8% Ownership

of Merged Entities

MAJOR ACQUISITION

Doubled the reserves and production base of
the Company

Properties located in Louisiana, the Gulf Coast,
South Texas, the Permian Basin and the Black
Warrior Basin.

Proved reserves are estimated at 16.3 Bcf and
4.9 MMBLS or 7.6 MMBOE

Current production from the properties is 5,194
Mcfd and 1,096 BOPD or 1,962 BOEPD.

Total Enterprise Value now $230 million

No additional staffing is required.

October 2007

BUSINESS STRATEGY

•Build production and cash flow base then drilling and
development inventory.

•Balanced growth

•Combination of “long life” and “high Impact” reserves

• Control operations (typically operate most properties)

• Target low operating cost and G&A structure

• Solicit industry and institutional partners on a promoted basis

GeoResources is focused on a balanced program
including the acquisition of oil and gas reserves and
exploitation, development, and exploration activities.

NEAR TERM GOALS

•Divest non-core properties

•Streamline operations

•Lower operating costs

•Focus on new deals

• Implement capital development program

• Expand prospect and drilling inventory

ACQUISITION CONSIDERATIONS

• Acquire producing fields or undeveloped acreage

• Acquire corporate entities

• Retain field operating control

• Accelerate field development

• Use price hedging

• Promote in partners

ü Diversification and risk management

ü Enhance economics by averaging down cost

MAJOR SHAREHOLDERS

• Equity investors include Vlasic FAL LP, Wachovia Capital Partners, LLC,
Frank A. Lodzinski and Collis P. Chandler, III and other members
of management

• Board and Management control 65.4% of outstanding shares

• Management has a 17.3% ownership stake

• Vlasic and Wachovia have invested with Southern Bay management in
prior companies

CORPORATE ORGANIZATION

* GeoResources is a Houston-based holding company conducting its operations through Southern Bay Energy, LLC and G3 Energy, LLC; Catena Oil & Gas,
LLC is the general partner to the SBE partners

MANAGEMENT

DIRECTORS:

Frank A. Lodzinski

Collis P. Chandler, III

Christopher W. Hunt*

Jay F. Joliat*

Scott R. Stevens*

Michael A. Vlasic

Nick Voller*

*independent directors

PERSONNEL

CORPORATE & SOUTHERN REGION

PERSONNEL

NORTHERN REGION

(1)

(1))

(1) Also Reports to Chief Financial Officer

PROPERTY MAP

PROVED RESERVE PROFILE

(1)

Reserves

14.8 Mmboe

(1) Data as of October 1, 2007

PV 10%

$274.6 million

PROVED RESERVES

	OIL MBBLS	GAS MMCF	MBOE
PDP	5,842	23,190	9,707
PDNP	2,061	4,329	2,783
PUD	1,791	3,365	2,352
TOTAL	9,694	30,884	14,842

PRO FORMA PRODUCTION

Q2 2007 Production	GEOI	Acquired Properties	TOTAL
Oil (Mbbls)	82	82	164
Gas (Mmcf)	361	494	855
MBOE	142	164	307

Based on second quarter 2007 actual production

Q2 Daily Average	GEOI	Acquired Properties	TOTAL
Daily Rate, boepd	1,562	1,806	3,368
Oil %	58%	50%	54%

ACREAGE

	Developed		Undeveloped		Total
	Gross	Net	Gross	Net	Gross	Net
Colorado	4,592	1,188	67,728	59,941	72,320	61,129
North Dakota	12,181	8,043	55,774	16,279	67,955	24,322
Montana	12,821	8,294	33,808	33,930	46,629	42,224
Louisiana	16,157	16,049	1,549	107	17,706	16,156
Texas	87,803	55,344	11,977	1,083	99,780	56,427
Other	27,634	26,802	10,041	6,129	37,675	32,931
TOTAL	161,188	115,720	180,877	117,469	342,065	233,189

CAPITAL EXPENDITURES

Horizontal Drilling
Rockies & Williston	$5.3
Texas	$6.2
Conventional Drilling	$3.4
Water Flood	$7.1
Exploratory Drilling	$6.0
Re-Engineering	$7.0
Other	$5.0
Total	$40.0 million

NOTE: Subject to change pending completion of
field studies. Further, timing of expenditures are
subject to change pending availability of rigs and
support services and adequate staffing to
effectively control activities and related costs.
Does not include development associated with
exploratory success. Does not include any new
acquisitions.

CAPITAL BUDGET	TOTAL
2007 (4th Quarter)	$3.0
2008	$32.0
2009	$5.0
Total	$40.0 million

UPSIDE POTENTIAL

Texas and Louisiana - Existing Producing Fields

•Horizontal drilling

•Conventional drilling

•Waterflood expansion

•Recompletions

•Deep Exploration Potential

Williston Basin - Existing Producing Fields

•Waterflood and pressure maintenance

•Horizontal drilling

•Restoring shut-in wells to production

•Recompletions

•In-fill drilling

UPSIDE POTENTIAL

Austin Chalk

•Horizontal drilling

•Five successful PUD locations drilled since acquisition

•Current dual lateral drilling - expected to be completed in December 2007

•Additional PUD locations

•Preliminary 9-12 more locations

•Workover and recompletion upside

•Additional exploratory potential on acreage

•REVERSIONARY INTEREST POTENTIAL

South Louisiana

•Shallow oil prospects, 3 wells expected to spud in November and December (5-11%
working interest, reversionary interest, generated prospect, operated)

•Shallow gas prospect, expected spud 2nd quarter 2008, pending performance of initial
discovery (28% working interest, operated)

•Several additional prospects in development

UPSIDE POTENTIAL

Williston Basin - Bakken Shale

•2,200 gross acres

•50% interest in acreage

•Roosevelt County, Montana

•Similar geological characteristics to recent Marathon discovery

•Extension of Richland County, Montana Bakken Shale play

Williston Basin - Bakken Shale

•38,000+ gross acres with joint venture partner

•10% - 15% working interest in joint venture

•Mountrail County, North Dakota

•First well - January 2008

•Similar geologic characteristics to EOG’s Parshall Field discovery

PARTNERSHIP

CATENA OIL & GAS, LLC*

(not included in company reserves)

SBE PARTNERS, LP

(see map)

8.3 Mmboe

3,386 Boepd

70% developed

85% gas

Drilling and exploration upside

• 2% GP Interest

• Management Fee

• 166,000 BOE

•33% Reversionary Interest

*May be used as general partner for additional institutional partnerships or industry joint ventures

PARTNERSHIP PROPERTIES

MANAGEMENT BACKGROUND

Frank A. Lodzinski has over 35 years of oil and gas industry experience. He has generated
significant returns to investors in several prior entities, and has served as President of Southern Bay
Energy, LLC since its formation in October 2004. Southern Bay contributed the majority of cash and
assets to the GeoResources merger. He is a certified public accountant and holds a BSBA degree in
Accounting and Finance from Wayne State University in Detroit, Michigan.

CEO & PRESIDENT

EXECUTIVE VICE PRESIDENT & CHIEF OPERATING OFFICER

Northern Region

Collis P. Chandler, III has over 18 years of oil and gas industry experience. Mr. Chandler has been
President and sole owner of Chandler Energy, LLC since its inception in July of 2000. From 1988-2000,
Mr. Chandler served as Vice President of The Chandler Company, a privately held exploration
company operating primarily in the Rocky Mountains. Mr. Chandler holds a Bachelor of Science degree
from the University of Colorado, Boulder.

FRANK A. LODZINSKI

COLLIS P. CHANDLER, III

MANAGEMENT BACKGROUND

EXECUTIVE VICE PRESIDENT & CHIEF OPERATING OFFICER

Southern Region

Francis M. Mury has been active in the oil and gas industry since 1974. He has worked in several
prior entities with Mr. Lodzinski since 1989. His experience extends to all facets of petroleum
engineering, including reservoir engineering, drilling, and production operations, and further into
petroleum economics, geology, geophysics, land and joint operations. Mr. Mury received a degree in
Computer Science (1974) from Nicholls State University, Thibodeaux, Louisiana.

VICE PRESIDENT

BUSINESS DEVELOPMENT, ACQUISITIONS & DIVESTITURES

Robert J. Anderson is a Petroleum Engineer with 19 years of domestic and international experience.
He joined Southern Bay Energy, LLC in January 2005 as Vice President, Acquisitions and Divestitures.
He has an undergraduate degree in Petroleum Engineering from the University of Wyoming (1986) and
also holds an MBA, Corporate Finance, from the University of Denver (1988).

FRANCIS M. MURY

ROBERT J. ANDERSON

MANAGEMENT BACKGROUND

VICE PRESIDENT & CHIEF FINANCIAL OFFICER

Howard E. Ehler was employed as Vice President and CFO of AROC, Inc. from May 2001 through
December 2004. Since January 2005, Mr. Ehler has been employed by Southern Bay Energy, LLC as
Vice President and CFO. Mr. Ehler holds and Accounting degree from Texas Tech University and has
been a certified public accountant since 1970.

HOWARD E. EHLER