Title: DISTRIBUTION OF CAMBRIAN-ORDOVICIAN RESERVOIR ROCKS CONTROLLDED BY SEQUENCE STRATIGRAPHY IN WESTERN TARIM BASIN
Abstract: The western Tarim basin undergone two transgression-regression cycles during the Cambrian-Ordovician , and formed a sequence stratigraphic framework composed of four third-order cyclic sequences and two second-order cyclic sequences, which controlled not only the plane distribution of different depositional facies, but also influenced the spatial and temporal distribution of various associations of source, reservoir and cap rocks. Xiaoerbulake Fm. and Wusonggeer Fm. were limited carbonate platform facies within Highstand System Tract(HST), and they were generally reworked by dolomitization during early time, and superimposed by late meteoric water leaching to form high-quality carbonate reservoir with small needle-like porosity and stable plane distribution. Whereas the Ordovician reservoirs were mainly formed in open platform facies, platform edge facies and algal beach facies, together with the joint influence by marine-burial diagenetic environments, the carbonate rocks were tightly cemented to form low-quality reservoir bed.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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