The oil in the Quiriquire field on the northern edge of the Maturin basin, Venezuela, occurs mainly in lenticular sand zones in the continental Quiriquire formation of Plio-Pleistocene age, and is thought to have migrated from marine and brackish-water equivalents of the continental beds and from underlying truncated Cretaceous to Miocene formations known to contain petroliferous sands. Discussion of the exploration and production history of the field is included.

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