岩性油气藏 ›› 2020, Vol. 32 ›› Issue (3): 122132.doi: 10.12108/yxyqc.20200312
程辉1, 王付勇1, 宰芸1, 周树勋2
CHENG Hui1, WANG Fuyong1, ZAI Yun1, ZHOU Shuxun2
摘要: 分析影响致密砂岩渗透率的主控因素并准确预测致密砂岩渗透率对致密油气藏的开发具有重要意义。以鄂尔多斯盆地延长组致密砂岩为研究对象,基于高压压汞和核磁共振对致密砂岩渗透率主控因素进行了研究,分别评价并优选了更适用于致密砂岩的基于高压压汞和核磁共振的渗透率预测模型。结果表明:影响致密砂岩渗透率的主要因素是孔喉半径,其中中值孔喉半径与致密砂岩渗透率相关性最强;与核磁共振T2加权平均值相比,T2几何均值与致密砂岩渗透率的相关性更强;在3种不同的核磁共振渗透率预测模型中,SDR-REV模型的预测效果要优于SDR模型和KCT2w模型;在3种不同的高压压汞渗透率预测模型中,基于r40和r45的Winland模型渗透率预测精度较高。研究成果对鄂尔多斯盆地延长组致密砂岩的进一步有效开发具有指导意义。
中图分类号:
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