Gulf Keystone Petroleum Regulatory News (GKP)

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22 September 2010

Gulf Keystone Petroleum Ltd. (AIM: GKP)

("Gulf Keystone" or "the Company")

Kurdistan Operational Update

Gulf Keystone Petroleum Ltd., an independent oil and gas exploration company, today provides an update on its operations in the Kurdistan Region of Iraq ("Kurdistan").

Shaikan Long Term Test Facilities

The recently constructed production test facilities near the location of the Shaikan-1 discovery well in the Shaikan Block (75% GKP working interest) are being commissioned. Initial flow rates are low to allow facility commissioning and will be kept low, pending receipt of oil assay results which will assist in determining a domestic sales price and allow finalisation of the oil sales contracts. Facility commissioning, assay finalisation and sales contract negotiation are expected to take several weeks. Test operations are well on track to reach the previously announced year end target production rate of 8,000 to 10,000 barrels of oil per day ("bopd").

John Gerstenlauer, Chief Operating Officer for Gulf Keystone said: "This marks the end of a seven month accelerated design and construction project to install the 18,000 bopd capacity facility and the beginning of a long term (18 to 24 month) production test of the top most reservoir in the Jurassic age section of the Shaikan well. This extended test of the upper portion of the Jurassic will give us valuable information on production characteristics, market logistics and oil sales procedures within Kurdistan. In addition, use of these prefabricated production facilities will serve as a model for future testing and production of other potential oil accumulations on our acreage."

Bijeel-1

Testing and evaluation are continuing on the MOL operated Bijeel-1 well in the Akri-Bijeel Block (20% GKP working interest). The previous announcement of a 3,200 bopd test already makes this one of the more significant discoveries in Kurdistan. Additional testing and evaluation work are still ongoing. However, the initial indication of the oil-water contact in this well is supportive of the concept of a single regional aquifer; this further supports the upside oil volume scenario for all four blocks in which GKP has an interest. In addition, it appears that the Bijeel structure could be a southern extension of the much larger Bekhme structure. The Bekhme exploration well is planned for late 2010 or early 2011.

Sheikh Adi-1

On Sheikh Adi-1, following the sticking of the bottom hole assembly at a depth of 450 metres and the necessary sidetrack to drill around the obstruction, the well is now at 500 metres which is the 20" casing point.

Shaikan-3

On the shallow Shaikan-3 appraisal well, near the site of Shaikan-1, the well is drilling ahead at 837 metres with the next casing point expected at 900 metres and the first zones of interest expected to be encountered soon after that.

Enquiries:

or visit: www.gulfkeystone.com

John Gerstenlauer, the Company's Chief Operating Officer, who has 31 years of relevant experience within the sector meets the criteria of a qualified person under the AIM note for mining, oil and gas companies and has reviewed and approved the technical information contained in this announcement. Mr Gerstenlauer is a member of the Society of Petroleum Engineers.

Notes to Editors:

§ Gulf Keystone Petroleum Ltd. (AIM: GKP) is an independent oil and gas exploration company focused on exploration in the Kurdistan region of Northern Iraq.

§ Gulf Keystone Petroleum International ("GKPI") holds Production Sharing Contracts for fourexploration blocks in Kurdistan.

§ The Company's shares have traded on the AIM market since listing on 8 Sept 2004.

§ Gulf Keystone Petroleum Limited is registered in Hamilton, Bermuda with offices in Erbil, Kurdistan, Algiers, Algeria and London, UK.

Not for release, publication or distribution, directly or indirectly, in or into the United States or jurisdictions other than the United Kingdom and Bermuda where to do so would constitute a contravention of the relevant laws of such jurisdiction. This document (and the information contained herein) does not contain or constitute an offer of securities for sale, or solicitation of an offer to purchase securities, in the United States or jurisdictions other than the United Kingdom and Bermuda where to do so would constitute a contravention of the relevant laws of such jurisdiction. The securities referred to herein have not been and will not be registered under the US Securities Act of 1933, as amended (the "Securities Act"), and may not be offered or sold in the United States unless the securities are registered under the Securities Act, or an exemption from the registration requirements of the Securities Act is available. No public offering of the securities will be made in the United States.