岩性油气藏 ›› 2015, Vol. 27 ›› Issue (1): 8188.doi: 10.3969/j.issn.1673-8926.2015.01.012
张宝收1,鲁雪松2,孙雄伟1,芦 慧3,卢玉红1,田 华2
ZHANG Baoshou 1,LU Xuesong 2,SUN Xiongwei 1,LU Hui 3,LU Yuhong 1,TIAN Hua 2
摘要:
塔里木盆地迪北气藏侏罗系阿合组为典型的低孔、低渗致密砂岩储层,非均质性强,油气分布复杂。针对研究区有效储层物性下限不清的问题,基于储层物性、录井、试油与压汞资料,结合核磁共振和低温吸附实验测试结果,综合运用最小流动孔喉半径法、排驱压力法、束缚水饱和度法、含油产状法、试油法和分布函数曲线法等 6 种方法,对迪北气藏阿合组有效储层物性下限进行了研究。 结果表明,迪北气藏阿合组有效储层孔隙度下限为 2.6%,渗透率下限为 0.08 mD;砂砾岩夹泥岩段(J1a1)→上砂砾岩段(J1a2)→下砂砾岩段(J1a3)储层物性逐渐变差,相应的储层物性下限也逐渐变低;J1a1,J1a2 和 J1a3 有效储层孔隙度下限分别为 3.1%,2.65%和 2.3%,渗透率下限分别为 0.14 mD,0.09 mD 和 0.065 mD。 有效储层物性下限的研究对迪北气藏的储层评价、储量计算和开发方案设计等均具有一定的指导意义。
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