RESERVOIR FEATURES OF QOM FORMATION AND CONTROLLINGFACTORS TO RESERVOIRS DEVELOPMENT IN KASHAN AREA, IRAN
Received date: 2007-08-03
Revised date: 2007-09-17
Online published: 2008-06-20
There are 4 sets of potential reservoirs in the Kashan area in Iran, among them the carbonate reservoir of Qom Formation in Oligocene Miocene is the most favorable one, and high commercial oil and gas flow was yielded from it. According to drilling, logging, geology, geophysics etc, the reservoir is comprehensively studied and evaluated. Some knowledge is gained as followings: bioclastic limestone in the carbonate platform is the main rock type. Valid pores are solution pore and fracture, pore type is fracture+proe, having double medium feature and serious heterogeneity. According to sedimentary facies and diagenesis, reservoir physical characters are better in well Arn1, Arn2, Arn3 than in well Fkh1, for fractures are not developed and cemented by shale seriously in the latter. The sedimentary environment of the Qom Formation is turbid water carbonate platform. Grain shoal, bioclastic shoal and point reef are the most favorable locations for valid reservoirs. Sedimentary environment, diagenesis and tectonic movement are the controlling factors of reservoir development.
Key words： Iran; Kashan; Qom Formation; Carbonate reservoir; Fracture amd pore; Sedimentary environment.
WANG Dong-xu . RESERVOIR FEATURES OF QOM FORMATION AND CONTROLLINGFACTORS TO RESERVOIRS DEVELOPMENT IN KASHAN AREA, IRAN[J]. Natural Gas Geoscience, 2007 , 18(6) : 875 -879 . DOI: 10.11764/j.issn.1672-1926.2007.06.875
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