For more details on each deal, see the text that follows this chart. The deals are described in the order in which they appear here.

U.S.

Buyer

Seller

Location of Assets

Comments

Admiral Bay Resources Inc.

NA

Kansas

Acreage

American Oil & Gas Inc.

Tower Colombia Corp.

Wyoming

Acreage

Arena Resources Inc.

NA

Kansas

Acreage

Austin Chalk Oil & Gas Ltd.

NA

Texas

WI

Black Dragon Resource Cos.

NA

Louisiana, Texas

Wells

BlackWell BMC LP

Venoco Inc.

Texas

Production: 559 BOE/d/net

Cano Petroleum Inc.

Square One Energy

Texas

Proved: 1 MMBOE

Chesapeake Energy Corp.

Laredo Energy II LLC, Pecos Production Co., Rubicon Oil & Gas I LP et al.

Texas

Proved: 289 Bcfe

ChevronTexaco Corp.

Unocal Corp.

Global

Proved:1.75 BBOE

Comstock Resources Inc.

EnSight Energy Partners LP

Texas, Louisiana, Mississippi

Proved: 120.2 Bcfe

Enterra Energy Trust

Rocky Mountain Gas Inc.

Montana, Wyoming

WI

FieldPoint Petroleum Corp.

NA

Texas

Acreage

Forest Oil Corp.

NA

Texas

Proved: 120 Bcfe

Harken Energy Corp.

NA

Abroad

Stock in subsidiary

IAS Communications Inc.

NA

Texas

WI

KCS Energy Inc.

Devon Energy Corp.

Texas, Louisiana

Proved: 48 Bcfe

Kerr-McGee Corp.

Jana Partners et al

NA

Stock buyback

NA

Carlyle/Riverstone

GOM, Texas

Stock in Mariner Energy

Maverick Oil and Gas Inc.

Camden Resources Inc.

Texas

Production: 6 MMcfe/d

Meritage Energy Partners LLC

Quicksilver, Merit, Dominion et al.

Wyoming, Colorado

Production: 885 BOE/d

KOP Holdings LLC

Meritage Energy Partners LLC

Kansas

WI

Methane Energy Corp.

NA

Oregon

Acreage

Nippon Oil Exploration Ltd.

Devon Energy Corp.

Gulf of Mexico.

Production: 13,000 BOE/d

Various

Devon Energy Corp.

U.S.

Proved: 88 MMBOE

Penn Virginia Resource Partners LP

NA

Kentucky, Virginia

Proved: 2.8 Bcfe

Petrogen Corp.

NA

Texas

WI

Petrohawk Energy Corp.

Mission Resources Corp.

Texas, GOM, Oklahoma

Proved: 226 Bcfe

PetroQuest Energy Inc.

TDC Energy Inc.

Gulf of Mexico

Proved: 10.5 Bcfe

Pinnacle Gas Resources Inc.

Pennaco Energy Inc.

Montana

Acreage

Teton Petroleum

NA

Colorado

Acreage

The X-Change Corp.

NA

Texas

Leases

Tradestar Corp.

NA

Texas

Acreage

Tri-Valley Corp.

Pleasant Valley Energy Corp.

California

Proved: 24 MMBOE

Vast Exploration Inc.

NA

Alabama

Acreage

Venoco Inc.

Marquez Energy LLC

California

Production: 450 BOE/d

Wavefront Energy

NA

Texas

Mineral rights

Whiting Petroleum Corp.

NA

Wyoming

Proved: 50.5 Bcfe

XTO Energy Inc.

Antero Resources Corp.

Texas

Proved: 440 Bcfe

XTO Energy Inc.

Plains Exploration & Production Co.

Texas, Louisiana

Proved: 175 Bcfe

XTO Energy Inc.

ConocoPhillips

Texas, New Mexico

NA

ConocoPhillips

XTO Energy Inc.

Texas, New Mexico, Alaska

NA

Canada

Blackpool Exploration Ltd.

NA

Alberta

Production: 200 BOE/d

Chamaelo Energy Inc.

NA

Alberta, B.C.

Proved: 25.8 MMBOE

CNOOC Ltd.

MEG Energy Corp.

Alberta

Interest in co.

Detector Exploration Ltd.

Bigstick Energy Ltd.

Alberta

Acreage

Fortress Financial Corp.

Nevarro Energy Ltd.

Alberta, Saskatchewan

WI

Galleon Energy Inc.

NA

Alberta

Production: 2,100 BOE/d

Gentry Resources Ltd.

NA

Alberta

WI

Highpine Oil & Gas Ltd.

Vaquero Energy Ltd.

Alberta

WI

Paramount Energy Trust

NA

Alberta

Production

Pilot Energy Ltd.

NA

Saskatchewan

Production: 150 Bbl/d

Pocaterra Energy Inc.

NA

Alberta

WI

Questerre Energy Corp.

Rupert's Crossing

Alberta

Production: 75 BOE/d

Rock Energy Inc.

Various

Western Canada

Production: 1,250 BOE/d

Vast Exploration Inc.

NA

Alberta

Acreage

Welwyn Resources Ltd.

Pan Orient Energy Ltd.

Alberta

WI

Australia

ExxonMobil Corp.

ChevronTexaco, Shell

Western Australia

WI

Vermilion Energy Trust

NA

Australia

Production: 4,800 BOE/d

Europe

Cardinal Resources Plc

Carpatsky Petroleum Inc.

Ukraine

WI

Falcon Oil & Gas Ltd.

Mako Energy Corp.

Hungary

Exploration licenses

Tullow Oil Plc

Shell, Esso

U.K. North Sea

WI

India

GeoGlobal Resources Inc.

Gujarat State Petroleum Corp.

India

WI

Former Soviet Union

Alaskan Oil and Gas

NA

Russia

WI

Amerada Hess Corp.

Trabant Holdings International

Russia

WI in Samara-Nafta

Apollo Eurasia Inc.

Kaliningradneft

Russia

WI in co.

KazMunaiGaz

BG

Caspian Sea

WI in Agip KCO