改善聚表剂油藏适应性方法及其效果研究  

Research on the Method and Effect of Enhancing the Adaptability between Polymer-Surfactant Agent and Reservoir

作　　者：苑盛旺 卢祥国[1] 姜晓磊[1] 曹伟佳[1] 李建冰[2] 俆典平 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中国石油大庆油田有限责任公司第八采油厂,黑龙江大庆163514 [3]中国石油大庆油田有限责任公司海外油田提高采收率项目部,黑龙江大庆163711

出　　处：《石油化工高等学校学报》2015年第6期49-54,共6页Journal of Petrochemical Universities

基　　金：黑龙江省自然科学基金重点项目资助(ZD201312)

摘　　要：抗盐聚合物通过分子间缔合作用来改变聚合物分子聚集态,促使其抗盐性明显提高。但改变聚合物分子聚集态也会增加分子线团尺寸,带来抗盐聚合物溶液油藏适应性变差问题。利用仪器分析、化学分析和现代物理模拟方法,以大庆油藏地质、流体和聚表剂为实验平台,以聚合物溶液黏度、分子线团尺寸、渗流特性和采收率等为评价指标,开展了聚表剂溶液分子聚集体调节方法及其效果实验研究。结果表明,β-环糊精可以抑制聚表剂分子间缔合程度,减小聚表剂分子聚集体尺寸,增加可进入储层渗透率范围。"聚表剂/β-环糊精"体系与岩心非均质性存在最佳匹配关系,此时聚表剂溶液扩大波及体积效果达到最佳,采收率增幅最大。Molecular aggregation state of salt-resistance polymer was changed by intermolecular association, which transparently enhanced its property of salt-resistance.However,molecular size was increased while the state of molecular aggregation was changed.Thus the question of worse adaptability between salt-resistance polymer and reservoir came out.By means of instrument analysis,chemical analysis and modern physical simulation method,taking reservoir geology,fluids and polymer-surfactant agent of Daqing as research platform,regarding polymer-surfactant solution viscosity,molecular thread size and seepage characteristics as evaluation index,the research on the adjusting method and effect of the state of molecular aggregation of polymer-surfactant agent was carried out.The results showed thatβ-CD could restrain the association of polymer-surfactant molecules,thus reduce the size of molecular aggregation of polymer-surfactant agent.All this led to the wider range of the permeability that could be flowed through.There existed a best matching relationship between polymersurfactant/β-CD and core heterogeneity.On this point,the effect of enlarging sweeping volume of polymer-surfactant agent was optimal and recovery efficiency reached a climax.

关 键 词：大庆油田 聚表剂 Β-环糊精 缔合程度 适应性评价 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]