一种新型抗甲醇气井泡排剂的研制及其性能评价

The development of a new anti-methanol gas well foam agent and its performance

以氧化胺(OA)、椰油酰胺基丙基甜菜碱(CAB)、铵盐(AS)和表面活性剂(J-1)为原料,通过正交试验研制出一种新型抗甲醇气井泡排剂GF。室内评价实验主要采用罗氏-迈尔斯(Ross-Miles)方法,利用采气现场取回含甲醇气田地层水对该泡排剂的表面张力、抗甲醇能力、耐温性能以及抗矿化度能力等进行了研究。实验结果表明,当单体最佳质量配比为3:2:5:9时,研制的泡排剂GF可大幅降低溶液的表面张力,具有优良的抗矿化度能力和较好的耐温性能。泡排剂GF罗氏泡沫高度和15min携液量均高于现场泡排剂OA-12、BS-12和CT5-2B,说明泡排剂GF具有较强的抗甲醇能力,可满足天然气的开采需要,具有广阔的应用前景。

A new anti-methanol gas well foam agent GF was developed by orthogonal experi- mental design as raw materials of amine oxide （OA）, cocoamidopropyl betaine （CAB）, ammo- nium salt （AS） and surfactant （J-l）. Ross-Miles evaluation method was used in laboratory; systematic study and evaluation was conducted on its surface tension, ability of anti-miner- alization and methanol resistance in field. Experiment results demonstrate that foam agent GF can reduce largely it＇s solution surface tension, which not only has excellent ability of anti-mineralization, but also temperature resistance, when the best quality ratio of monomer is 3：2：5：9. The foam agent possesses good methanol resistance when the height of Ross foam and the amount of carrying fluid of GF was superior than OA-12,BS-12 and CTS-2B. It can meet the needs of natural gas exploitation and has broad application prospects.