层间非均质砾岩油藏水驱油模拟实验

doi:10.11885/j.issn.1674-5086.2012.06.06.02

摘要/Abstract

摘要：

针对砾岩油藏层间非均质性强，开采过程中层间矛盾突出，剖面动用差异大，油藏整体采收率低的特点，以新
疆油田七区克上组砾岩油藏为例，开展了不同非均质程度模型恒压水驱油实验。结果表明：同一组并联水驱油实验
中，渗透率越高的岩芯越先启动，含水率上升越快，无水采收率越低，驱油效率越高；层间渗透率级差越大模型驱油效
率越低，与高渗岩芯相对渗透率级差大于8 的岩芯并联驱替不能启动；粗砂岩和含砾粗砂岩等单模态或双模态孔隙结
构岩芯驱油效率较高，砂砾岩和砾岩等复模态孔隙结构岩芯驱油效率较低；增大并联模型驱替压差后中低渗岩芯驱油
效率增大，含水率上升速度加快。

关键词: 砾岩油藏, 层间非均质性, 并联岩芯, 水驱油实验, 驱油效率

Abstract:

Aiming at the strong heterogeneity，the obvious contradiction between layers，the big producing difference of the
profile and the low overall recovery rate of the reservoir. Taking the conglomerate reservoir of T2k2 formation in Block 7 of
Xingjiang Oilfield as an example，a series of water-oil displacing experiments of different heterogeneous degree are conducted
at constant pressure. The experiments show that in the same group of the parallel water-oil displacing experiments，the higher
the permeability is，the faster the cores start while the water cut rises faster，the breakthrough recovery gets lower and the
displacing efficiency becomes higher；the differential between the layers increases as the displacing efficiency falls and the
parallel displacement with relative permeability differential bigger than 8 can not be launched；cores of single mode or dual
mode pore structure have higher displacement efficiency，the complex mode of sandy conglomerate and conglomerate has lower
displacement efficiency，the displacement efficiency of the low-medium permeability cores increases and the water cut rises
faster after the displacement pressure of the parallel model is magnified.

Key words: conglomerate reservoir, interlayer heterogeneity, cores grouped in parallel, water displacing oil experiment, oil
displacement efficiency

唐洪明1，文鑫2，张旭阳2，任小聪3，刘红现4. 层间非均质砾岩油藏水驱油模拟实验[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2012.06.06.02.

Tang Hongming1, Wen Xin2, Zhang Xuyang2, Ren Xiaocong3, Liu Hongxian4. Water-oil Displacing Modeling Experiment of Interlayer Heterogeneous
Conglomerate Reservoir[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2012.06.06.02.

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