Zion Oil & Gas Announces Successful Re-Entry Operations at Its Elijah #3 Well in Northern Israel

DALLAS and CAESAREA, Israel, Aug. 8, 2012 (GLOBE NEWSWIRE) -- Zion Oil & Gas, Inc. (Nasdaq:ZN) announced the successful end of field operations at its Elijah #3 wellsite within its 78,824 acre Asher-Menashe License in northern Israel.

In July 2012, Zion re-entered the existing wellbore of its temporarily suspended Elijah #3 well and acquired an electric wireline log suite that had not been acquired when the well was originally drilled in 2010. A Formation Evaluation Log (an advanced petrophysical evaluation analysis) was then derived from the newly acquired log suite and Zion subsequently obtained approximately 48 sidewall core samples from key zones in the previously drilled wellbore. During the re-entry operations, Zion also obtained vertical seismic profile (VSP) data. Zion was assisted in this project by Baker Hughes, the Geophysical Institute of Israel, NuTech Energy Alliance ("NuTech"), Core Labs, and Bedrock Petroleum Consultants.

A preliminary review of the NuTech Formation Evaluation Log indicates the presence of a series of carbonates over two thousand feet thick, with the possibility of interspersed zones of developed fair to good porosity and permeability with oil shows (up to a combined several hundred feet thick) at depths shallower than 9,350 feet. When the sidewall core samples were retrieved, dark brown hydrocarbon stains were noted on some sidewall core samples. The core samples have been sent to Houston, Texas for further analysis and both Baker Hughes and the Geophysical Institute of Israel are processing the VSP data. Zion estimates that the analysis of the core samples and the VSP processing and analysis will take at least one month.

Zion's Chief Executive Officer, Richard Rinberg, said, "After successfully completing this exploratory work, initial indications are positive; however, much analysis needs to be carried out during the coming weeks and months."

Zion's President and Chief Operating Officer, Victor G. Carrillo, said: "We are excited about the potential of this relatively shallow, stacked carbonate with a possible Jurassic oil column in our Elijah #3 wellbore. The combination of old data and newly acquired geophysical and geological data represents the most extensive dataset Zion has ever had, as the Company has never previously obtained VSP or sidewall core data. I believe this combination of data will give us a better subsurface image of the hydrocarbon potential in proximity to this wellbore."

The primary purpose of the re-entry operation was to obtain additional geologic and geophysical data and to better understand the hydrocarbon potential of a zone through which Zion drilled while drilling the Elijah #3 well in late 2009 and early 2010. The Elijah #3 well, originally planned to drill to below 17,000 feet, to test both Triassic and Permian-aged geological formations, was temporarily suspended in 2010 after encountering technical issues at a total depth of approximately 11,000 feet. In the recently completed field operations, the rig arrived at the Elijah #3 wellsite on July 15, 2012, and was released by the Company on August 8, 2012.

Zion Oil & Gas, a Delaware corporation, explores for oil and gas in Israel in areas located onshore between Haifa and Tel Aviv. It currently holds three petroleum exploration licenses: the Joseph License (on approximately 83,272 acres) and the Asher-Menashe License (on approximately 78,824 acres) between Netanya, in the south, and Haifa, in the north, and the Jordan Valley License (on approximately 55,845 acres), just south of the Sea of Galilee. The total license area amounts to approximately 218,000 acres.

FORWARD-LOOKING STATEMENTS: Statements in this communication that are not historical fact, including statements regarding Zion's planned operations, geophysical and geological data and interpretation, anticipated time frame of the completion of testing and analysis, anticipated attributes of geological strata being drilled, drilling efforts and locations, the presence or recoverability of hydrocarbons, sufficiency of cash reserves, timing and potential results thereof and plans contingent thereon are forward-looking statements as defined in the "Safe Harbor" provisions of the Private Securities Litigation Reform Act of 1995. These forward looking statements are based on assumptions that are subject to significant known and unknown risks, uncertainties and other unpredictable factors, many of which are described in Zion's periodic reports filed with the SEC and are beyond Zion's control. These risks could cause Zion's actual performance to differ materially from the results predicted by these forward-looking statements. Zion can give no assurance that the expectations reflected in these statements will prove to be correct and assumes no responsibility to update these statements.

Zion's homepage may be found at: www.zionoil.com

The Zion Oil & Gas, Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=6850

CONTACT: Zion Oil & Gas, Inc.
         6510 Abrams Rd., Suite 300
         Dallas, TX 75231
         Brittany Russell:
         Telephone: 214-221-4610
         Email: dallas@zionoil.com
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