尿素泡沫辅助蒸汽驱物理模拟实验研究  

Physical Simulation Experiment Study on Steam Flooding Adding Urea and Foaming Agent

作　　者：钱宏图[1,2] 刘鹏程[1,2] 沈德煌[3] 聂凌云[3] 李晓玲[3] 韩静[3] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]海相储层演化与油气富集机理教育部重点实验室,中国地质大学,北京100083 [3]中国石油勘探开发研究院提高采收率国家重点实验室,北京100083

出　　处：《油田化学》2013年第4期530-533,543,共5页Oilfield Chemistry

基　　金：国家重大专项"稠油油藏多元热流体开发技术"(项目编号2008ZX0512-005);"CO_2驱油与埋存潜力评价及战略规划"(项目编号2011ZX05016-006);"含CO_2天然气藏开发技术"(项目编号2008ZX05016-001);中央高校基本科研业务费专项资金"稠油流变性与井网研究"(项目编号:2652013094)

摘　　要：针对Ⅱ类稠油油藏(具有边底水、埋藏较深、黏度大等)蒸汽吞吐开采基本进入中后期,但目前尚未找到其它有效接替技术的难题,本文利用热采物理模拟技术,开展了尿素泡沫辅助蒸汽驱开采机理及技术可行性研究。在驱替实验中,尿素溶液的质量分数为25%,泡沫剂GFPA-4B溶液和降黏剂DVB-107溶液的质量分数均为0.5%,填砂管模型的水测渗透率1.83~2.16μm^2,驱替流速为3.6 mL/min。结果表明:尿素泡沫辅助蒸汽驱可以大幅度提高驱油效率,热水+尿素驱、热水+尿素+泡沫剂驱、热水+尿素+泡沫剂+降黏剂驱的累积采收率比纯热水驱的分别提高了8.13%、16.67%和21.27%;蒸汽+尿素驱、蒸汽+尿素+泡沫剂驱、蒸汽+尿素+泡沫剂+降黏剂驱的累积采收率比纯蒸汽驱的分别提高了3.49%、5.31%和9.41%。此外对尿素泡沫辅助蒸汽驱的驱油机理进行了探讨。the Ⅱreservoir of heavy oil which is a deep buried heavy oil field with active edge and bottom water and high viscosity and so on, almost is in the middle and later stage, however, there are not any effective replacement processes currently. To solve these problems, the mechanism of steam flooding adding urea and foaming agent was studied with the physical simulation. In the experiment, the concentration of urea solution was 25%, the concentration of foam solution GFPA-4B and viscosity reducer DVB-107 was 0.5%, respectively, the permeability measured by water flooding of the sand-pack was 1.83-2.16 gm2, the floodingrate was 3.6 mL/min. The results showed that urea solution could significantly improve the displacement efficiency, the cumulative displacement efficiency of the hot water＋urea displacement, hot water＋urea＋foam solution displacement, hot water＋urea＋foam solution＋visc0sity reducer displacement was increased by 8.13%, 16.67% and 21.27%, respectively, compared to that of hot water displacement. The cumulative displacement efficiency of the steam＋urea displacement, steam＋urea＋foam solution displacement, steam＋urea＋foam solution＋viscosity reducer displacement is increased by 3.49%, 5.31% and 9.41%, respectively, compared to that of steam displacement. Besides, that the mechanism of steam displacement adding urea and foam solution was studied.

关 键 词：蒸汽驱 尿素 高温起泡剂 降黏剂 稠油热采 驱油机理 

分 类 号：TE345[石油与天然气工程—油气田开发工程]