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利用相平衡理论预测原油沥青质沉淀率 被引量:1

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摘要 国内外大量CO2驱矿场实践均发现了沥青质沉淀现象,沥青质沉淀会吸附于孔隙表面、堵塞孔隙喉道,进而导致CO2驱油井产量的下降。为了准确计算CO2驱过程中的沥青质沉淀率,采用状态方程描述气-液相平衡,用正规溶液理论描述固相沥青质的非理想性,建立气-液-固三相相平衡热力学模型,结合物料守恒方程进行油气体系的相平衡计算,进而预测沥青质的沉淀率。运用该模型对某CO2驱原油体系进行了相平衡闪蒸计算,得到沥青质的沉淀率,与实验值相对比平均误差在允许范围之内。
出处 《油气田地面工程》 2015年第11期22-24,共3页 Oil-Gas Field Surface Engineering
基金 中国石油科技创新基金研究项目"CO2驱油藏原油沥青质沉淀影响因素研究"(2008D-5006-02-07)资助
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