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| Alluvial Fan Conglomerate Reservoir Sedimentary Characteristics of Lower Karemary Formation in the 6th District of Karemary Oilfield |
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Abstract: By using the core, geological, and log data, alluvial fan conglomerate reservoir sedimentary characteristics of Lower Karemary Formation in the 6th District of Karemary Oilfield were studied and the distribution patterns of sandbodies were analyzed. The results show that Lower Karemary Formation is the alluvial fan face. The 6th District is located on a single fan. Sedimentary characteristics of each subfacies were analyzed on the basis of subfacies subdivision. The study shows that the inner fan is composed mainly of conglomerate, the middle is composed mainly of microconglomerates and gritrock, and the outer fan is composed mainly of fine sandstone. There are three distribution patterns of sandbodies:sheet pattern in inner fan, broad band pattern in middle fan and narrow band pattern in outterfan. The study of sedimentary characteristics and distribution patterns of sandbodies of each subface offer some geological guidelines for oilfield development.
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Received: 14 August 2009
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2009, Vol. 27 
