Gran Tierra Energy Announces Resumption of Crude Oil Transportation in Southern Colombia and Increased Production in Argentina

    Exploration and Development Operations Continue in Colombia, Argentina,

    CALGARY, Alberta, Jan. 12 /CNW/ -- Gran Tierra Energy Inc. (NYSE
Alternext: GTE; TSX: GTE), a company focused on oil exploration and production
in South America, today announced that crude oil transportation has resumed in
southern Colombia as a result of the lifting of the strike at the Orito
facilities operated by Ecopetrol and gave an update on its exploration and
production activities. With the resumption of crude oil transportation, Gran
Tierra expects to attain its 15,000 barrels of oil per day (BOPD) net after
royalty production target in the first quarter of 2009, and to continue
growing production to 20,000 BOPD in the second half of 2009, while
maintaining current gas production levels.
    Production Update
    In December 2008 Gran Tierra Energy produced approximately 2,250 BOPD net
after royalty, down from a maximum of approximately 13,000 BOPD net after
royalty attained in late November. In Colombia, December production averaged
approximately 1,100 BOPD net after royalty and approximately 394 thousand
standard cubic feet of gas per day (Mcf/day) net after royalty. In Argentina,
Gran Tierra Energy production grew to an average of approximately 1,150 BOPD
net after royalty in December.
    Colombia Operations Update
    Chaza Block
    Gran Tierra Energy recently conducted two short drill stem tests (DST) in
Costayaco-6, the sixth well drilled in the Costayaco field that was discovered
in 2007. DST-1 was conducted in the lower Villeta T sand over a four foot
interval from 8,638 feet to 8,642 feet measured depth (MD). The test recovered
approximately 151 barrels of formation water in 5.8 hours. DST-2 tested 22
feet over three upper Villeta T sand intervals including 8,594 - 8,602 feet,
8,612 -- 8,616 feet, and 8,622 -- 8,632 feet MD. The abbreviated test was
inconclusive and only 20 barrels of water and a small amount of gas were
recovered. Gran Tierra Energy plans to conduct additional testing operations
in the upper Villeta T intervals in the first quarter of 2009 to confirm the
presence or absence of oil that was indicated on logs and in cuttings. The
next development well, Costayaco-7, is scheduled to be drilled in February.
Gran Tierra Energy has a 100% working interest in the Chaza Block and is the
    Magangue Block
    The installation of a booster compressor was completed in December for
the Guepaje-1 production well. With the booster compressor, production has
increased from approximately 500 Mcf/day to its current rate of approximately
3,200 Mcf/day gross, or approximately 1,000 Mcf/day net after royalty. Gran
Tierra Energy has a 37.8% working interest in the Magangue Block and is the
    Rio Magdalena Block
    A service rig was moved to Popa-2, a gas-condensate discovery made in
2008, for an extended production test which is scheduled to begin in mid-
February. Gran Tierra Energy also plans to commence a 70 square kilometer 3D
seismic acquisition program over the Popa field and an adjacent prospect in
the Rio Magdalena Block in the first quarter of 2009. Gran Tierra Energy has a
40% working interest in the Rio Magdalena Block and is the operator.
    Guachiria Norte Block
    An exploration well, Puinaves-2, is scheduled to spud in February 2009.
Gran Tierra Energy has a 70% working interest and is the operator of the
Guachiria Norte Block.
    Guachiria Sur Block
    A 115 square kilometer 3D seismic program is currently being acquired in
this block to define future drilling prospects. Gran Tierra Energy has a 70%
working interest and is operator of the Guachiria Sur Block.
    San Pablo Block
    Planning continues for an exploration well in the second quarter of 2009.
Gran Tierra Energy has a 100% working interest in the San Pablo Block and is
the operator.
    Argentina Operations Update
    Ipaguazu Block
    Gran Tierra Energy completed a successful re-entry at IP.x-1, a
previously suspended oil well, achieving an average flow rate of 220 BOPD
through a 1.97" choke. Gran Tierra Energy plans to install a production
facility at Ipaguazu and place IP.x-1 on production in the second quarter of
2009. Gran Tierra Energy has a 100% working interest in the Ipaguazu Block and
is the operator.
    Valle Morado Block
    A re-entry was conducted at VM.x-1001, a previously suspended gas well,
achieving an average flow rate of 4,940 Mcf/day along with 3,271 barrels of
water per day. The data collected is currently under review to determine the
feasibility for further development.
    Surubi Block
    A successful workover was conducted at Proa-1, the oil field discovery
well drilled in 2008, to eliminate water channeling from an upper interval.
After the workover Proa-1 has an average production rate of 918 BOPD gross
with a 7% watercut. Gran Tierra Energy has an 85% working interest and is the
operator of the Surubi Block.

    Peru Operations Update
    Blocks 122 and 128
    Gran Tierra Energy is proceeding with permitting and planning for the
acquisition of 500 kilometers of 2D seismic data, which is scheduled to begin
in the fourth quarter of 2009. Gran Tierra Energy has 100% working interest in
Blocks 122 and 128 and is the operator.
    About Gran Tierra Energy Inc.
    Gran Tierra Energy is an international oil and gas exploration and
production company operating in South America, headquartered in Calgary,
Canada and incorporated in the United States. The company holds interests in
producing and prospective properties in Colombia, Argentina and Peru. The
company has a strategy that focuses on growing a portfolio of producing
properties, plus production enhancement and exploration opportunities to
provide a base for future growth. Gran Tierra Energy trades on the NYSE
Alternext under the symbol "GTE" and on the Toronto Stock Exchange under the
symbol "GTE".
    Additional information concerning Gran Tierra Energy is available at , on SEDAR ( and with the
Securities and Exchange Commission (
    Forward Looking Statements
    The statements in this press release regarding Gran Tierra Energy's
expectations regarding first quarter and future oil production rates and gas
production levels, and plans and schedules for testing, drilling and seismic
acquisition, and plans to install a production facility at Ipaguazu, are
"forward-looking statements" within the meaning of the U.S. federal and
Canadian securities laws, including Canadian Securities Administrators'
National Instrument 51-102 Continuous Disclosure Obligations and the U.S.
Private Securities Litigation Reform Act of 1995. These forward-looking
statements are subject to risks, uncertainties and other factors that could
cause actual results or outcomes to differ materially from those contemplated
by the forward-looking statements. Although, Gran Tierra Energy believes that
the assumptions underlying, and expectations reflected in, these forward-
looking statements are reasonable, it can give no assurance that these
assumptions and expectations will prove to be correct.
    Factors that could cause results to differ materially from those
described in the forward-looking statements include:  Gran Tierra Energy's
operations are located in South America, and unexpected problems can arise due
to additional strikes, guerilla activity, technical difficulties, operational
difficulties and weather conditions which impact operations, including the
exploration, production, transportation or sale of oil and gas; heightened
unrest in Colombia could imperil the safety and security of Gran Tierra
Energy's assets and personnel despite the safety measures Gran Tierra Energy
has put in place to address the current situation, which could also delay the
testing and drilling and could also impact production; and those other risks
found in the periodic reports filed by Gran Tierra Energy with the United
States Securities and Exchange Commission, including in the section entitled
"Risk Factors" in its Quarterly Report on Form 10-Q filed with the Securities
and Exchange Commission on November 6, 2008, and available at the Securities
and Exchange Commission's internet site and on SEDAR at
    All forward-looking statements in this press release are expressly
qualified by information contained in each company's filings with regulatory
authorities and, subject to its obligations under applicable securities laws,
Gran Tierra Energy does not undertake to publicly update forward-looking
statements, whether as a result of new information, future events or


     Dana Coffield                         Al Palombo
     Gran Tierra Energy Inc.               Cameron Associates
     President & Chief Executive Officer   Investor Relations
     (800) 916-4873                        (212) 554-5488         


For further information:

For further information: Dana Coffield, President & Chief Executive
Officer of Gran Tierra Energy Inc., 1-800-916-4873,; or Al
Palombo, Investor Relations of Cameron Associates, +1-212-554-5488,, for Gran Tierra Energy Inc. Web Site:

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Gran Tierra Energy Inc.

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