![]() ![]() Production ceased in May 2015 as a result of difficulties securing work and equipment permits and a dispute between Saudi Arabia and Kuwait. Processing and interpretation of the data has been completed, and work to mature several exploration prospects continues. It is one of the largest land seismic programs ever undertaken, covering 1.1 million acres (4,600 sq km). In 2016, the company completed a 3-D seismic survey covering the entire onshore Partitioned Zone. The entire project is designed to determine the technical and economic viability of thermal-recovery projects in the Eocene reservoirs of the Wafra Field. This project was preceded by steam stimulation of some wells, followed several years later by a small-scale test. However, the carbonate Eocene reservoirs at Wafra have properties that are promising for successful steamflooding, which involves injecting steam into heavy oil reservoirs to heat the crude oil underground, thereby reducing its viscosity and enabling its extraction through wells. Typically, carbonate reservoirs are highly fractured and not conducive to steamflooding on a large scale. A carbonate reservoir is an oil or gas trap formed in reefs, dolomite and certain types of limestone. In 2009, steam injection began at the Large-Scale Steamflood Pilot Project for the carbonate First Eocene reservoir at the Wafra Field. ![]() ![]() The agreement was extended and amended in 2009 and expires in 2039. Chevron has an agreement with Saudi Arabia to operate the kingdom’s 50 percent interest in the hydrocarbon resources of the onshore PZ. Companies that later became part of Chevron have produced oil on behalf of Saudi Arabia in the onshore PZ since 1949. ![]()
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