--> Abstract: Petrophysical Characterization of the Upper Jurassic Kimmeridgian of the Zaap Field in the Campeche Bay; #90063 (2007)

Datapages, Inc.Print this page

Petrophysical Characterization of the Upper Jurassic Kimmeridgian of the Zaap Field in the Campeche Bay

 

Castellanos, Francisco1, Victor Hugo Moreno2, Bolivar Villacres3 (1) AMGE, AMGP and AIPM (all in Mexico), Ciudad del Carmen, Mexico (2) CIPM, AIPM, UNAM (all in Mexico), Ciudad del Carmen, Mexico (3) Schlumberger, Ciudad del Carmen, Mexico

 

The Upper Jurassic Kimmeridgian Zaap deposit (Zaap JSK) is constituted for packstone to grainstone of ooids and pellets that has suffered processes of cementation, compactation, pressure - dissolution and dolomitization. They possess excellent intercrystalline porosity, in microcaverns of dissolution and in fractures with good impregnation of oil.

 

The problematics of this deposit is that in agreement to the last volumetric calculation realized officially in 1999 the deposit Zaap JSK had an OOIP of 475 MMBlo, an original oil reserve of 91.2 MMBlo, and a cumulative production of 87.7 MMBlo at December 31, 2005, which indicates there is a 3.5 MMBlo remaining, value that surely is bigger given than the deposit produces in average 70,000 barils per day of oil, and in agreement to the compartment of the pressures in the deposit the wells still have flow capacity as a primary producer during a major period that was estimated officially (February, 2006).

 

To re-evaluate the reserves, the existing information was validated, the petrophysical evaluation of six wells of the deposit was made by two methods, the types of rock were determined by graphs. Also it was possible to identify the flow units and volumes was determined using volumetric methods and material balance which had a difference of 5 % among them, and which indicate that more than 120 additional MMblo exists to the reserve certified in 1999.

 

AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California