CAJ | 학술논문

CO 2驱和CO 2泡沫驱是提高采收率的有效技术。研究利用改进的高温高压可视化CO 2泡沫仪，针对不同表面活性剂，在不同CO 2相态、温度和压力条件下进行了CO 2泡沫性能测试实验。根据泡沫性能的不同评价指标，分析了影响CO 2泡沫性能的主要因素，及其不同实验条件和实验方法下测得的泡沫性能参数的相关性。结果表明，CO 2的相态(气态、液体和超临界状态)对产生泡沫的形态和泡沫性能影响很大。泡沫的起泡体积和稳定性主要受表面活性剂的类型和性能、温度和压力的影响。利用填砂管驱替实验装置，在不同压力、温度和渗透率条件下进行了CO 2泡沫流动实验，根据测试的阻力因子评价CO2泡沫的封堵剂流度控制能力，并与高温高压泡沫仪的测试参数进行对比和关联。实验结果表明，填砂管的渗透率对CO 2泡沫的封堵和流度有很大影响，渗透率越大，泡沫的封堵能力越强，有利于提高波及效率和降低CO2的流度。驱替实验所测得的CO2泡沫的流动阻力因子与泡沫仪测试的起泡体积和半衰期正相关，但泡沫的半衰期对泡沫的封堵和流度影响更大，即泡沫的稳定性是影响其在地层内流度控制作用的主要因素。
CO 2구화CO 2포말구시제고채수솔적유효기술。연구이용개진적고온고압가시화CO 2포말의，침대불동표면활성제，재불동CO 2상태、온도화압력조건하진행료CO 2포말성능측시실험。근거포말성능적불동평개지표，분석료영향CO 2포말성능적주요인소，급기불동실험조건화실험방법하측득적포말성능삼수적상관성。결과표명，CO 2적상태(기태、액체화초림계상태)대산생포말적형태화포말성능영향흔대。포말적기포체적화은정성주요수표면활성제적류형화성능、온도화압력적영향。이용전사관구체실험장치，재불동압력、온도화삼투솔조건하진행료CO 2포말류동실험，근거측시적조력인자평개CO2포말적봉도제류도공제능력，병여고온고압포말의적측시삼수진행대비화관련。실험결과표명，전사관적삼투솔대CO 2포말적봉도화류도유흔대영향，삼투솔월대，포말적봉도능력월강，유리우제고파급효솔화강저CO2적류도。구체실험소측득적CO2포말적류동조력인자여포말의측시적기포체적화반쇠기정상관，단포말적반쇠기대포말적봉도화류도영향경대，즉포말적은정성시영향기재지층내류도공제작용적주요인소。
Injection of CO2 and CO2 foam is an effective technique for improving oil recovery. In this study, the performance of CO2 foaming agents (surfactants) was investigated using an improved high pressure and high temperature foam visualization device. CO2 foam was generated, and the foaming volume and half-life of foam were measured under high temperature and pressure. Experimental results show that foam can be formed and observed at various CO 2 states, i.e. gas, liquid and supercritical states. Surfactants and temperature have a significant effect on CO 2 foaming performance, and the effect of pressure on the foam stability is dependent on surfactant types. Moreover, the capability of CO2 foam for mobility control in porous media was evaluated by a resistance factor measured in flooding experiments using various sandpacks. Different evaluation parameters on CO2 foam performance revealed in the experiments were compared and correlated. The results show that the foaming volume and half-life of foam are proportional to the foam capability in mobility control, while foam stability (indicated by half-life) is more important for reducing its mobility at flowing conditions in porous media.