Water soluble acrylamidomethyl propane sulfonate (AMPS) copolymer as an enhanced oil recovery chemical
Water soluble acrylamidomethyl propane sulfonate (AMPS) copolymer as an enhanced oil recovery chemical
复制标题
DOI：
10.1021/ef010253t
复制
发表时间：
2003-05-01
期刊：
影响因子：
5.3
通讯作者：
Haque, I
中科院分区：
文献类型：
--
作者：
Sabhapondit, A;Borthakur, A;Haque, I
合成并表征了N-二甲基丙烯酰胺与2-丙烯酰胺基-2-甲基丙磺酸钠的高分子量（> 10（6））共聚物（NNDAM-NaAMPS）。研究了共聚物作为提高石油采收率（EOR）化学品的功效。在不同的盐水浓度和温度下，使用孔隙度为42%的72-150目大小的疏松砂进行岩心驱替试验。最初，原油馏分（150- 300 ℃），最后，原油本身被用作待回收的油。该共聚物是盐水相容的。在水驱之后，通过将2000 ppm聚合物溶液注入到含有油馏分和5000 ppm NaCl盐水的填砂中，可以回收约5.6%的原始石油地质储量（OIP）。发现聚合物溶液在120 ℃下至少1个月的时间内是热稳定的。进一步证实了随着温度的升高，剩余油采收率也随之升高。通过在90 ℃下将2000 ppm聚合物溶液注入含有一种印度原油和由一价和二价金属离子组成的盐水的疏松砂填料中，可以回收约11%的OIP作为额外的油。
A high molecular weight (> 10(6)) copolymer of NN-dimethyl acrylamide with Na-2-acrylamido-2-methylpropanesulfonate (NNDAM-NaAMPS) was prepared and characterized. The efficacy of the copolymer as an enhanced oil recovery (EOR) chemical was studied. Core flood tests using 72-150 mesh size unconsolidated sand having a porosity of 42% were carried out at different brine concentrations and temperatures. Initially, a crude oil fraction (150-300degreesC) and, finally, the crude itself were used as the oils to be recovered. The copolymer was brine compatible. After a water flood, about 5.6% original oil in place (OIP) could be recovered by injecting 2000 ppm polymer solution to the sand pack containing oil fraction and 5000 ppm NaCl brine. The polymer solution was found to be thermally stable at 120degreesC at least for a period of 1 month. It was further confirmed that the residual oil recovery increased with the increase of temperature. About 11% of OIP could be recovered as additional oil by injecting a 2000 ppm polymer solution to the unconsolidated sand pack containing one of the Indian crude oils and brine consisting of mono-and bivalent metal ions at 90degreesC.