准噶尔盆地西北缘三叠系是我国西部的重要油气产层,由于构造运动强烈、构造样式复杂,其沉积相类型主要以各类山前扇体、辫状河和辫状河三角洲为主；由于各沉积体发育期次、叠置样式复杂多样,对其优质储层展布规律的研究难度非常大。分析总结了三叠系储层的成岩作用类型及特征,认为克百地区三叠系成岩作用主要以压实作用、胶结作用和溶蚀作用为主。通过计算视压实率、视胶结率和视溶蚀孔隙度定量地划分了成岩相,并分析了各类成岩相的分布特征。利用优选出的有利成岩相分布区预测了优质储层的分布范围。
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The Triassic system of northwestern Jungger Basin is one of the most important producing formation in western China. Intense tectonic movements, complicated tectonic structure styles, fans, braided fluvial deposits, and braided deltas have complicated and diversified the development stages and superposition styles and it's very difficult to forecast the distribution of high grade reservoirs. Based on the analysis of the diagenetic types and features, this paper considers that compaction, cementation and denudation are the dominant diagenesis in the study area. By calculating compaction percentage, cementation percentage and denudation percentage, we classify diagenetic facies. Also the features of distribution are researched and used to guide the exploration by telling the favorable diagenetic facies distribution.
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