油田注水吞吐采油的可行性分析

Graham.J．W．的自吸理论公式揭示了裂缝性油藏自吸水驱油量与基质的物性、润湿性、油水界面张力、原油粘度以及油水接触面积的关系。根据这一理论公式，阐明了注水吞吐采油井应选择地层能量不足、原油粘度低、剩余可采储量高、油层亲水并具有1～2个物性好的主力油层，最好是反韵律所组成的裂缝发育的油组。亲油岩心、高粘度原油的全模拟实验证明，在注入水中加入表面活性剂和粘土防膨胀剂，可有效地保护储层、降低油水界面张力、改变岩石润湿性．可大幅度提高原油采出程度。

A Feasibility Analysis of Waterflood Swallowing - spitting Oil Production

Graham, J. W's imbibition theoretical formula shows the relation in fractured oil reservoir between oil displacement rate of spontaneous water imbibition and matrix physical characterization, wettability, interfacial tension, oil viscosity as well as area of oil - vater contact. According to the theoretical formula, the paper illustrates that with lacking formation energy, low oil viscosity and high quantity of remaining recoverable oil, hydrophilic reservoir that has 1 to 2 main pays with good physical characterization, which may as well be fractured reservoir group consisted of anti - rhythm, should be chosen is wa-terflood swallowing - spitting oil production. The whole simulation test with oil - wet cores and extremely viscous oil demonstrates that injection water with surfactant and clay swelling inhibition can protect reservoir effectively, lower interfacial tension, change rock wettability, and increase recovery percentage to a great extent.