The history of oil and gas exploration in Cambodia dates back to the 1950's when the first reported geological surveys of Cambodian territory were conducted by a team of Chinese geologists. In the early 1960s, Polish geologists also conducted geological and structural mapping, locating some oil seeps and outcrops as well as further identifying the country's mineral.
          An Elf and Esso consortium undertook the first offshore drilling between 1972 and 1974. The consortium drilled three exploratory wells: B-1, H-1, and L-1, in the Khmer Trough located roughly 100 to 200 km. off the coast from Sihanouk Ville.
          The exploration scene was then very quiet until 1987 when Russian and Cambodian geologists performed a geological and geophysical study, identifying seven sedimentary basins with oil and gas potential in onshore and offshore areas and dividing the areas into seven offshore blocks and nineteen onshore blocks.

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Last Update: 8 August 2002