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方法结合矿场实验，应用油藏工程方法及数值模拟技术，研究砂砾岩稠油油藏蒸汽吞吐后转蒸汽驱的开采规律及其效果。目的改善稠油油藏的热采效果，进一步提高采收率。结果砂砾岩稠油油藏按照优选的注采参数实施蒸汽驱，除遵循一般的蒸汽驱开采规律外，还表现为：蒸汽驱受效过程较温和，反映在采油井上，蒸汽驱有效期长，蒸汽突破晚；转驱后，初期对采油井适时吞吐引效，中期开展蒸汽泡沫调剖，后期关汽窜采油井等一系列配套措施，对改善汽驱效果均是有效的。结论适时转蒸汽驱预计可比一直吞吐到底提高采收率１０％左右，经济上可行；选择合理的转驱时机、井网井距和注采参数是提高汽驱效果的关键；采取一系列的调整措施是改善汽驱效果的保证
Methods Based on the field experiments and reservoir engineering methods and numerical simulation techniques, the law and effect of steam flooding recovery after steam huff and puff in glutenite heavy oil reservoirs were studied. Objective To improve the thermal recovery effect of heavy oil reservoirs and further enhance oil recovery. Results The gravelly heavy oil reservoir implemented steam flooding according to the preferred injection and production parameters. In addition to following the general rule of steam flooding, the performance of the sandstone conglomerate heavy oil reservoir is also as follows: the steam flooding and recovery process is relatively mild and is reflected in the production wells; the steam flooding has a long effective period; steam A breakthrough in the late; after the re-drive, the initial stimulation of the production well in time, steam foam in the mid-profile control, the late Guan steam channeling wells and a series of complementary measures to improve the effect of steam flooding are effective. Conclusions It is economically feasible that timely conversion of steam flooding is estimated to be about 10% higher than that of conventional steam flooding. It is the key to improve the flooding effect by selecting reasonable driving times, well spacing and injection and production parameters. A series of adjustments Measures to improve the effect of steam flooding guarantee