大庆头台源13西块聚合物调驱适应性研究

发布时间：2018-01-30 14:22

  本文关键词： 大庆头台油田 低渗透储层 调驱剂 储层适应性 工艺参数 物理模拟　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：大庆头台油田源13西开发区属于非均质性较强的低渗透油田,注水开发阶段暴露出诸如注入压力快速上升、套损严重、地层压力水平低且下降速度快等问题,在目前井网条件下储层原油难以有效动用,这严重制约和影响到油田开发效果和经济效益。为此,必须寻求进一步挖掘油层剩余潜力和提高原油采收率技术措施。针对矿场实际需求,本课题以油藏工程、物理化学和分析化学为理论指导,以仪器检测、化学分析、物理模拟为技术手段,以调驱剂黏度、聚合物分子线团尺寸、阻力系数、残余阻力系数和采收率等为评价指标,以源13西开发区储层地质和流体为研究平台,开展了调驱剂筛选及其油藏适应性研究。在此基础上,开展了调驱效果评价和注入工艺参数优选物理模拟。源13西开发区储层岩石属于高孔低渗砂岩,具有孔隙尺寸较小、分选性较差和水敏速敏等特点。目标区块实施聚合物驱或聚合物凝胶调驱时,与储层相适应聚合物相对分子质量≤800×104,聚合物浓度≤900mg/L。与聚合物溶液相比较,Cr3+聚合物凝胶渗流阻力较大,液流转向能力较强。与连续注入方式相比较,采用“聚合物溶液与水或Cr3+聚合物凝胶与水”交替注入方式,不仅可以降低因调驱剂进入中低渗透层所产生的负面效应、提高储层动用程度,而且能够节约调驱剂用量、降低施工成本。
[Abstract]:Yuan13West Development Zone of Daqing Toutai Oilfield belongs to a low permeability oilfield with strong heterogeneity. During the stage of water injection development, problems such as rapid rise of injection pressure, serious casing damage, low formation pressure level and fast decreasing speed are exposed. The reservoir crude oil is difficult to be used effectively under the condition of well pattern at present, which seriously restricts and affects the development effect and economic benefit of oil field. It is necessary to seek further exploration of the remaining potential of reservoir and technical measures to improve oil recovery. According to the actual demand of mine field, this subject is guided by reservoir engineering, physical chemistry and analytical chemistry, and is tested by instrument. Chemical analysis, physical simulation as a technical means, the viscosity of the flooding agent, polymer molecular coil size, resistance coefficient, residual resistance coefficient and oil recovery as the evaluation index. Based on reservoir geology and fluid of Yuan-13 West Development Zone, the study on reservoir adaptability and screening of flooding agent is carried out. The reservoir rocks of Yuan13 West Development Zone belong to high porosity and low permeability sandstone with small pore size. When polymer flooding or polymer gel flooding is carried out, the relative molecular weight of polymer is less than 800 脳 104. The polymer concentration 鈮，

本文编号：1476449