西北地质2017，Vol.50Issue(2)：28-36,9.
石南地区侏罗系西山窑组碎屑岩储层主控因素分析
Main Controlling Factors of Clastic Reservoir in Jurassic Xishanyao Formation, Shinan Area
摘要
Abstract
Combined with geology logging and well logging data, the petrological characters, pore types, sedimentary environment and diagenesis of clastic reservoir in Xishanyao Formation have been studied by SEM, casting thin sections, X-ray diffraction, and then the main controlling factors of this clastic reservoir have been analyzed, the high-quality reservoir distribution has been cleared, providing theoretical guide for further exploration and development.The results show that the Xishanyao Formation reservoir was developed in braided delta front, with underwater distributary channel facies as its main microfacies, being dominated by gray or celadon fine and medium sandstone, while its pore types contain residual intergranular pore, primary intergranular pore and intergranular solution pore, belonging to medium porosity and low permeability formation.The reservoir characteristics were destroyed by compaction and cementation during the diagenesis, reducing about 40%~70%and 5%~30% of primary pores, irrespectively;The secondary pores formed by the dissolution is constructive and take up 30% of the whole pores.Reservoir characteristics are mainly controlled by sedimentary environment compared to diagenesis;The high-quality reservoir is distributed in the underwater distributary channel microfacies of braided delta front.关键词
石南地区/储层物性/沉积特征/成岩作用/主控因素Key words
Shinan area/reservoir characteristic/sedimentary characteristic/diagenesis/main controlling factors分类
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李彦举,郭晖,牛斌,张顺存,鲁新川..石南地区侏罗系西山窑组碎屑岩储层主控因素分析[J].西北地质,2017,50(2):28-36,9.基金项目
国家自然科学基金青年科学基金项目(编号41503048)资助 （编号41503048）
