Geophysical Characteristics of Ordovician Carbonate Rock, Central Tarim Basin
Received date: 2008-09-08
Revised date: 2008-12-16
Online published: 2009-02-10
Ordovician carbonate rock is the main reservoir in the Tazhong area of Tarim basin. Geophysical characteristics of Ordovician carbonate rock were studied using drilling data. Impedance is affected mostly by material properties and reservoirs types, to a negligibly extent by lithology and flow. Compact layers and minor fracture reservoirs of Ordovician carbonate rock have characteristics of high density, high velocity and high impedance, and the prediction of minor fractures reservoir is difficult by the general seismic ways. Big fractures and fractured vuggy and vuggy and cavity reservoirs of Ordovician carbonate rock have characteristics of minor density and low velocity and low impedance in central Tarim basin, which obviously different from the surrounding rock and produce obvious characteristics in seismic data, so reservoirs can be predicted by applying general seismic data. The conclusion provides guidance for predicting carbonate reservoirs and reducing exploration risk.
GONG Hong-Lin . Geophysical Characteristics of Ordovician Carbonate Rock, Central Tarim Basin[J]. Natural Gas Geoscience, 2009 , 20(1) : 138 -142 . DOI: 10.11764/j.issn.1672-1926.2009.01.138
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