低渗透油藏液流转向剂传输运移能力与驱油效率

发布时间：2018-11-17 21:15

【摘要】：大庆头台油田源13西块PI组油层为处于高含水开发期的低渗透油藏,亟待扩大低渗透层波及体积。以高分子材料学、物理化学和油藏工程等理论为指导,以化学分析、仪器检测和物理模拟等为技术手段,以多测压点长岩心各个区间的压差和驱油效率为评价指标,以目标油藏的储层和流体为模拟对象,开展了深部液流转向剂传输运移能力和驱油效率物理模拟实验。结果表明:在聚合物浓度相同条件下,与聚合物溶液相比较,Cr~(3+)聚合物凝胶在储层岩心内传输运移能力较差,但二者差异并不明显;随岩心渗透率减小,转向剂传输运移能力变差;当渗透率小于100×10~(-3)μm~2后,转向剂传输运移能力和驱油效率都明显减小;在聚合物相对分子质量和质量浓度相同条件下,与聚合物溶液比较,Cr~(3+)聚合物凝胶驱油效率较高,技术经济效果较好。
[Abstract]:The PI formation of West Block 13 in Daqing Toutoutai Oilfield is a low permeability reservoir in high water cut development period, and it is urgent to expand the sweep volume of low permeability layer. Under the guidance of the theories of polymer materials, physical chemistry and reservoir engineering, chemical analysis, instrumentation and physical simulation are used as technical means, and the pressure difference and displacement efficiency of long cores at multiple pressure measuring points are taken as the evaluation indexes. Taking the reservoir and fluid of the target reservoir as the simulation object, the physical simulation experiments on the transport and migration capacity and displacement efficiency of the deep liquid flow steering agent are carried out. The results show that Cr~ (3) polymer gel has poor transport and migration ability in reservoir core under the same polymer concentration compared with polymer solution, but the difference between the two is not obvious. When permeability is less than 100 脳 10 ~ (-3) 渭 m ~ (-2), the transport and migration capacity and oil displacement efficiency of steering agent decrease obviously. Under the same relative molecular weight and concentration of polymer, Cr~ (3) polymer gel has higher oil displacement efficiency and better technical and economic effect than polymer solution.
【作者单位】：大庆头台油田开发有限责任公司;东北石油大学提高油气采收率教育部重点实验室;
【基金】：国家自然科学基金项目“抗盐型聚合物油藏适应性及其改进方法基础研究”(51574086)
【分类号】：TE348

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