长庆特低渗裂缝发育油藏三维模型驱油实验研究

发布时间：2018-11-25 10:38

【摘要】：为真实模拟长庆特低渗透油藏渗流特征、确定水驱后剩余油的合理挖潜方法,采用人造微裂缝露头岩心与天然基质露头岩心并联的三维物理模型,开展石油磺酸盐表面活性剂驱、直链型聚合物驱和聚合物/表面活性剂二元驱驱油实验。研究结果表明,三维非均质模型和实际油藏物性相近,较好地模拟了油藏真实情况。与水驱相比,裂缝层、基质层和并联岩心模型表面活性剂驱分别提高采收率2.65%、2.72%和2.67%,聚合物驱分别提高采收率5.65%、3.32%和4.57%,二元驱分别提高采收率8.23%、5.09%和6.69%。与表面活性剂驱、聚合物驱相比,二元驱提高采收率效果明显,可望用于长庆油田水驱后驱油。
[Abstract]:In order to simulate the percolation characteristics of Changqing ultra-low permeability reservoir and determine the reasonable method of tapping the potential of remaining oil after water flooding, a three-dimensional physical model of artificial micro-fracture outcrop core and natural matrix outcrop core is used. The experiments of petroleum sulfonate surfactant flooding, straight chain polymer flooding and polymer / surfactant binary flooding were carried out. The results show that the three-dimensional heterogeneous model is similar to the real reservoir physical properties, and the reservoir real situation is well simulated. Compared with water drive, the oil recovery of fractured layer, matrix layer and parallel core model surfactant flooding were increased by 2.65% and 2.67%, respectively, and the oil recovery by 5.65% and 4.57% by polymer flooding, respectively. Binary flooding increases recovery by 8.23% and 6.69% respectively. Compared with surfactant flooding and polymer flooding, binary flooding improves oil recovery obviously, and is expected to be used in oil displacement after water flooding in Changqing Oilfield.
【作者单位】：低渗透油气田勘探开发国家工程实验室;中国石油长庆油田分公司勘探开发研究院;
【基金】：国家科技部科技专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(项目编号2011ZX05044) 中国石油股份公司重大科技专项“长庆油田油气当量上产5000万吨关键技术研究”(项目编号2011E-13)
【分类号】：TE357.46

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