New
Opportunities for an Old Field
Rojas, Temistocles1, Rosmari Usta1, Lehywis
Villa1, Villasmil Jose1, Prieto Isabel1, Chirinos
Francisco1, Miladis Blanco1 (1)
PDVSA,
Depositional fluvial systems develop a
main area of sediment transport and deposition. Peripheral areas to this main
depositional area can develop minor depositional systems, with lesser sandy
deposits than the main system but with still prospective oil accumulations and
rock properties.
Bachaquero Field located in west
coast of the
Previous works have interpreted this
reservoir as deposited in a fluvial system, being the main production area the
main area of the fluvial system. Throughout a multidisciplinary study it was
possible to locate a secondary fluvial system at the west side of the main
reservoir, where the sand thickness and extension are poorer than in the main
area but with more energy (~1000 psi). Using seismic,
geological, petrophysical a reservoir data it was
possible delineate the sandbodies geometry within
this relatively new area as well as to distribute the petrophysical
properties within the sandbodies.
This static model allowed us to propose a
drilling strategy based on horizontal wells in order to recover the oil from
these thin sandy deposits. The production success obtained using this model has
not been reported in Bachaquero field since 1960's.
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California