文72块沙三中油藏天然气驱可行性试验研究

ExperImental Study of Natural-gas Injection FeasIbility In the Middle Position of Es_3 Reservoir of Block Wen 72

根据文南油田 72块沙三中油藏的性质和流体特征 ,通过室内细管驱替试验和长岩心驱替试验研究 ,表明注入天然气组成达到一定比例和注入气的温度大于某一临界值 ,就可以对该油藏进行注烃类气体混相驱 ,说明注气开发是可行的 。

Based on the reservoir properties and its fluid characteristics in the middle position of Es 3 member in Block Wen 72 of Wennan Oilfield, slime-tube and long core displacement tests are made. The results show that the miscible displacement with hydrocarbon gas injection is carried out in the reservoir as the composition of natural gas reaches to certain demanded proportion and the temperature of injected gases is higher than a critical value, which demonstrates that the gas drive development is feasible and the oil recovery can be enhanced.