CAJ | 학술논문

注蒸汽热力采油是开采稠油油藏的主要技术手段，但由于长期的热力作用和地层本身的非均质性，蒸汽吞吐或蒸汽驱过程中极易发生汽窜，严重影响开采效果。热敏凝胶的黏度随着温度的升高而增高，在一定范围内可逆变化，正适于注蒸汽开采油藏的深度调驱。以单56块先导试验区的地层性质数据建立地质模型，分析了热敏凝胶的调驱机理；根据数模结果研究了纵向窜流、有效厚度等地质参数以及操作参数对开采效果的影响。数值模拟结果表明：纵向渗透率、净毛比、初始含油饱和度、埋深等均在一定程度上影响采收率和深部调驱效果；考虑到经济因素，热敏凝胶调堵注入孔隙体积倍数可取0．1 PV；热敏凝胶注入时机越晚，开发效果越差，而当吞吐+汽驱的总采出程度超过30%以后，开发效果大幅降低，因此当吞吐与汽驱的总采出程度低于30%前实施注热敏凝胶调驱开发效果较好。
주증기열력채유시개채주유유장적주요기술수단，단유우장기적열력작용화지층본신적비균질성，증기탄토혹증기구과정중겁역발생기찬，엄중영향개채효과。열민응효적점도수착온도적승고이증고，재일정범위내가역변화，정괄우주증기개채유장적심도조구。이단56괴선도시험구적지층성질수거건입지질모형，분석료열민응효적조구궤리；근거수모결과연구료종향찬류、유효후도등지질삼수이급조작삼수대개채효과적영향。수치모의결과표명：종향삼투솔、정모비、초시함유포화도、매심등균재일정정도상영향채수솔화심부조구효과；고필도경제인소，열민응효조도주입공극체적배수가취0．1 PV；열민응효주입시궤월만，개발효과월차，이당탄토+기구적총채출정도초과30%이후，개발효과대폭강저，인차당탄토여기구적총채출정도저우30%전실시주열민응효조구개발효과교호。
Steam injection is an essential method in exploiting heavy oil reservoir. Because of the thermal effects in a long time and high heterogeneity in the stratum itself, steam channeling always happens, which affects produc-tion seriously in the steam stimulation and steam flooding process. The viscosity of heat sensitive gel increases with the temperature and then changes reversibly within a certain range, which is suitable for depth displacing adjust-ment in steam injection . Based on the geological data in pilot area of Shan 56 , a geological model was established. Mechanism of displacing control was analyzed;meanwhile the effect of geological parameters such as vertical chan-neling, net thickness and operating parameters on production was studied according to simulation results. The nu-merical simulation results are as follows:parameters such as vertical permeability,net-to-gross, initial oil saturation and depth will certainly affect recovery and displacing. Taking economy into account, 0. 1 PV gel injection is cho-sen. The later gel is injected, the worse the development results. After the total recovery displaced by stimulation and gas flooding reaches 30%, the development effect is reduced significantly, therefore. Only before recovery rea-ches 30%, the gel injection is more effective.