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石南地区位于准噶尔盆地腹部,其J1s21砂组为湖侵体系域沉积,砂体发育,储盖层配置良好,是该区岩性圈闭发育的有利层位。以井、震资料为基础并综合多种沉积参数,研究了该区J1s21砂组的精细沉积相,并分析了岩性圈闭的主控因素,预测了岩性圈闭发育的有利区带,最后,以夏盐3井岩性圈闭作为实例,对其储盖组合、成藏条件进行了评价。
The Shijin area is located in the abdomen of the Junggar Basin. Its J1s21 sand group is a sedimentary system of lacustrine system. The sand body is well developed and the reservoir is well capped, which is a favorable horizon for the development of lithologic traps. Based on the well and seismic data and combining various sedimentary parameters, the fine sedimentary facies of J1s21 sand group in this area was studied. The main controlling factors of lithologic traps and the favorable zones of lithologic traps were predicted. Finally, taking the lithologic trap of Xiayan-3 well as an example, the reservoir-cap assemblage and reservoir forming conditions were evaluated.