吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (4): 1060-1069.doi: 10.13278/j.cnki.jjuese.201704108
田敏1, 董春梅1, 林承焰1, 柴小颖2, 王丽娟2
Tian Min1, Dong Chunmei1, Lin Chengyan1, Chai Xiaoying2, Wang Lijuan2
摘要: 从柴达木盆地涩北二号气田砂泥薄互层滩坝相高孔-中低渗细粒储层特征出发,以气层产能为评价目标,在分析其内涵的基础上,选取孔隙度、渗透率、含气饱和度、有效厚度和泥质体积分数5个地质参数,厘清各参数的影响方式,并建立层次结构模型;以单砂体为基本单元,将消除生产压差影响的"视无阻流量"作为比较参数,采用相关分析结合层次分析法确定参数权重;结合现场生产实际从产能角度将气层分为3类。结果表明:气层分布特征与实际气井产能趋势吻合较好,气层产能分布不但受控于含气丰度、储层条件及原始地层压力,同时也受隔层质量及构造位置的影响。纵向上,由深至浅各气层组的气层数量逐渐增多,但高产能级别气层比例逐渐降低;气层组内部普遍具有气层下少上多,气层产能级别下高上低的特征。平面上,高产能级别气层较多分布在构造高部位即含气面中央部位,向构造边部逐渐过渡为低产能级别气层。通过评价气层产能潜力,可全面了解气层产能分布状况,便于优化调整部署方案。
中图分类号:
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