Market Overview

Kosmos Energy Provides Update on Exploration Drilling Program Offshore Mauritania


(NYSE:KOS) (LSE: KOS) announced today that it has completed
drilling the Hippocampe-1 exploration well located in Block C-8 offshore
Mauritania in approximately 2,600 meters of water.

Designed to test Lower Cenomanian and Albian reservoirs charged from the
deeper Valanginian – Neocomian source, the Hippocampe–1 well was drilled
to a total depth of 5,500 meters. Well-developed reservoirs were
encountered in both exploration targets but these proved to be water
bearing. The well will now be plugged and abandoned. It is believed that
this prospect failed due to a lack of charge access in this part of the
play fairway.

Andrew G. Inglis, chairman and chief executive officer, said: "Following
on from our Yaakar discovery earlier this year, Hippocampe-1 is the
second of four tests of independent prospects located in the outboard
basin floor fan fairways in our Mauritania and Senegal acreage. Although
the well did not encounter oil or gas, it has, together with Yaakar,
confirmed the presence of quality cretaceous reservoir in the outboard
basin floor fans, which contain multiple leads and prospects, more than
200 kilometers from the north to south through our blocks. We are still
in the early stages of opening this newly emerging basin and our forward
drilling program remains unchanged given the independent nature of the
prospect tests, in particular with regard to charge."

The Ensco DS 12 drillship will now proceed as planned to Block C-12
offshore Mauritania to test the independent Lamantin oil prospect. The
Lamantin prospect is located approximately 80 kilometers offshore and
180 kilometers northeast of Hippocampe in 2,185 meters of water. The
prospect comprises Campanian age reservoirs charged from the shallow,
immediately underlying, oil prone, oil mature Albian and
Cenomanian–Turonian source rocks.

Kosmos holds rights in the C-6, C-8, C-12, C-13, and C-18 contract areas
under production sharing contracts with the Government of Mauritania's
Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM).
The blocks range in water depth between 100 and 3,000 meters, and have
combined acreage of over 40,000 square kilometers gross. Kosmos is the
exploration operator of Block C-8 with 28 percent equity and is joined
by its partners BP (LSE:BP) (62 percent) and SMHPM (10 percent).

About Kosmos Energy

Kosmos is a leading independent oil and gas exploration and production
company focused on frontier and emerging areas along the Atlantic
Margin. Our assets include existing production and development projects
offshore Ghana, large discoveries offshore Mauritania and Senegal, as
well as exploration licenses with significant hydrocarbon potential
offshore Suriname, Sao Tome and Principe, Morocco and Western Sahara. As
an ethical and transparent company, Kosmos is committed to doing things
the right way. The Company's Business
 articulate our commitment to transparency, ethics, human
rights, safety and the environment. Read more about this commitment in
the Kosmos 2016
Corporate Responsibility Report
. Kosmos is listed on the New York
Stock Exchange and the London Stock Exchange under the ticker symbol
KOS. For additional information, visit

Forward-Looking Statements

This press release contains forward-looking statements within the
meaning of Section 27A of the Securities Act of 1933 and Section 21E of
the Securities Exchange Act of 1934. All statements, other than
statements of historical facts, included in this press release that
address activities, events or developments that Kosmos expects, believes
or anticipates will or may occur in the future are forward-looking
statements. Kosmos' estimates and forward-looking statements are mainly
based on its current expectations and estimates of future events and
trends, which affect or may affect its businesses and operations.
Although Kosmos believes that these estimates and forward-looking
statements are based upon reasonable assumptions, they are subject to
several risks and uncertainties and are made in light of information
currently available to Kosmos. When used in this press release, the
words "anticipate," "believe," "intend," "expect," "plan," "will" or
other similar words are intended to identify forward-looking statements.
Such statements are subject to a number of assumptions, risks and
uncertainties, many of which are beyond the control of Kosmos, which may
cause actual results to differ materially from those implied or
expressed by the forward-looking statements. Further information on such
assumptions, risks and uncertainties is available in Kosmos' Securities
and Exchange Commission ("SEC") filings.
Kosmos undertakes no
obligation and does not intend to update or correct these
forward-looking statements to reflect events or circumstances occurring
after the date of this press release, except as required by applicable
law. You are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date of this
press release. All forward-looking statements are qualified in their
entirety by this cautionary statement.

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