论文部分内容阅读
系统研究环江地区延长组长7储层沉积特征及夹层特性,明确环江地区长7的沉积类型和储层非均质性,有利于日后的勘探开发。利用岩心观察、粒度分析、测井资料等方法进行分析研究,结果表明,环江地区长7段主要发育东部深湖-半深湖浊积扇和西部的三角洲前缘沉积;且浊积砂体储层的物性要好于三角洲前缘储层,含油气性较好,此结果与试油资料相吻合。但浊积岩储层非均质性较强,夹层较发育,其夹层分布受到沉积环境的控制作用明显,东部浊积砂体夹层密度和频率明显高于西部三角洲前缘储层。
The sedimentary characteristics and interlayer characteristics of Chang 7 reservoir in Yanchang Formation in Huanjiang area are systematically studied. The sedimentary types and reservoir heterogeneity of Chang 7 in the Huanjiang area are clarified, which is in favor of future exploration and development. The results of core analysis, grain size analysis and well logging data show that the Chang 7 Member in the Huanjiang area mainly develops turbidite fan in the eastern deep lake - semi-deep lacustrine and the delta front in the west. The turbidite sand body The physical property of the reservoir is better than that of the delta front reservoir, which has better oil and gas. The result is consistent with the test oil data. However, the turbidite reservoirs are highly heterogeneous, and the interbed is well developed. The distribution of turbidites is obviously controlled by the depositional environment. The interlayer density and frequency of the turbidite sand bodies in the eastern part are obviously higher than those of the western delta frontal reservoirs.