摘要
使用XL30扫描电子显微镜,采用新的膨胀倍率评价方法,从微观角度测定了新型孔喉尺度调堵剂微球的形态和膨胀倍率,研究了温度、矿化度和水化膨胀时间对微球膨胀性能的影响规律。微球的粒径膨胀倍率随着温度的升高而逐渐增大,随着矿化度的升高而逐渐减小,随着水化时间的延长而逐渐增大,最终趋于稳定;调堵剂微球在尕斯油藏地层水矿化度为17 4501 mg/L、油藏温度126℃下膨胀15 d,其粒径膨胀倍率为3.93,表现出良好的抗温抗盐和老化稳定性。通过多测压点长岩心填砂管实验,研究了调堵剂微球的运移封堵性能。调堵剂微球具有良好的注入性和一定的封堵能力。利用天然岩心进行驱油实验,提高采收率达11.80%.
The microscopic feature and the expansion multiplying factor of new pore-throat scale microsphere As Profile Control Agent are measured using XL30 Scanning Electron Microscope and new expansion multiplying factor evaluation method. The effects of temperature, salinity and swelling time on expansion performance of mierosphere are analyzed. The results show that the expansion multiplying factor of microspher＇s grain diameter gradually increases with the temperature and the swelling time increasing, decreases with the salinity increasing, and ultimately being stable. In Gasi reservoir, this expansion multiplying factor is 3.93 after the microsphere expanded for 15 days under the circumstances of formation water （17 4501 mg/L） and temperature （126℃）, showing good temperature resistance, salinity resistance and stability. The performance of migration and plugging of the microsphere As Profile Control Agent is studied by the long core test, showing that it has good injectivity and plugging capacity. The core displacement test indicates that the EOR given by such a new microsphere approach is up to 11.80%.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2009年第6期748-750,共3页
Xinjiang Petroleum Geology
关键词
调堵剂
微球
温度
矿化度
性能
采收率
profile control agent
microsphere
temperature
salinity
performance
EOR
