Morocco's Rif Foreland Basin Offers a Major New
Oil
and
Gas
Play
J. Christian Pratsch
Morocco contains a number of distinct basins, each with its specific
geological history. No major producible
oil
and
gas
have yet been found in spite
of major past efforts. However, in the Rif Foreland Basin in onshore
northwestern Morocco a large yet unexplored new
oil
and
gas
play exists. This
play is centered on two distinct major depocentres lying in front of the Rif
Thrust Belt; they are known from published gravity and magnetic data and should
contain thermally mature Mesozoic source beds. The
oil
and
gas
reserve potential
here lies in the class of 0.5-1.0 billion BOE or higher, with new
oil
and
gas
reserves of hundreds of million BOE or more per discovery.
Oil
source beds are known from the southern Prerif Basin flank in several
Jurassic carbonate and shale units;
gas
may be generated in additional Paleozoic
and Neogene source beds. Potential reservoirs range from Paleozoic, Triassic and
Jurassic clastics to Jurassic carbonates and Miocene/Pliocene sandstones. Traps
will be structural and stratigraphic. Small
oil
production of some 7.0 million
BO has been obtained along the basin's south flank.
Oil
generation, migration
and entrapment occurred since Early Miocene. Modern seismic data permit mapping
down to basement. The key to successful low-cost low-risk exploration here lies
at reliable seismic data acquisition following a detailing fill-in gravity
survey.
AAPG Search and Discovery Article #91020©1995 AAPG Annual Convention, Houston, Texas, May 5-8, 1995
