聚合物驱油井产能规律研究

Research on productivity law of polymer flooding oil wells

韩光明 代兆国 方圆 单秀华 郭睿 傅新勇

HAN Guangming DAI Zhaoguo FANG Yuan SHAN Xiuhua GUO Rui FU Xinyong

承德石油高等专科学校，河北承德　067000 中国石化江汉石油工程有限公司井下测试公司，湖北武汉　430048 中国石化胜利油田孤岛采油厂，山东东营　257231 中国石油华北油田公司，河北任丘　062552

Chengde Advanced Petroleum College, Chengde 067000, China Downhole Testing Company of Jianghan Petroleum Engineering Co. Ltd., SINOPEC, Wuhan 430048, China Gudao Oil Production Plant of Shengli Oilfield Company, SINOPEC, Dongying 257231, China Huabei Oilfield Company, CNPC, Renqiu 062552, China

研究聚驱井产能规律，可以为选择采油装置和制定油井工作制度提供参考。实验研究了聚合物溶液的流变性，建立了考虑含水率、流变性、聚合物溶液浓度、黏弹性等因素下的地层流体有效黏度综合模型；其次，在此基础上，以压力与产量的变化作为定解条件，推导了聚合物驱区块见聚油井产能预测模型，并对产能进行了敏感性研究。结果表明，随产出液或注入液稠度系数增加及流性指数降低时，产液量会降低；渗透率降低幅度增加或考虑弹性黏度时，相同井底流压下产液量也会减少； 注入聚合物浓度降低或油井含水率增加时，油井产液量增加。此外，不同条件下流入动态曲线相似，可仿照Vogel 的方法通过数值模拟研究得到聚合物驱IPR 曲线方程。

Research on the productivity law of polymer flooding wells can provide references for selection of oil production system and formulation of oilwell working system. In the test, the rheology of polymer solution was studied, and an integral model for effective viscosity of formation fluid was built which took into account such factors as watercut, rheology, solubility of polymer solution, viscoelasticity. Then based on the above, a model for forecasting polymer flooding oilwell productivity was built for polymer flooding blocks using changes in pressure and production as definite conditions, and sensitivity research was performed for oil productivity. The research result shows that fluid production will decrease with the increase of consistence coefficient of produced fluid and flow index or with the increase of consistence coefficient of injected fluid and decrease of flow index. And that, fluid production will decrease at the same bottom flow-pressure when the permeability decreased degree increases or when viscoelasticity is considered. Oilwell fluid production will increase with the decrease of polymer concentration or the increase of watercut. In addition, the inflow performance relationship (IPR) curves are similar under different conditions, so the polymer flooding IPR curve equation may be obtained through numerical simulation research using Vogel method.

10.13639/j.odpt.2015.03.021