油田开发历程模拟实验技术

Simulation experiment technique of oilfield development course

为了建立一套科学可行的模拟油田开发历程的方法,以油田整体开发历程为研究对象,采用物理模拟手段进行了室内研究。对弹性和注水开发阶段的主要影响因素进行了实验评价,以胜利油区胜坨油田沙二段为对象进行了对比试验。结果表明,在弹性开发阶段,地层压力下降了0.5MPa,采收率仅为3%;注水开发阶段的采收率为25%左右,该阶段每采出1%的原油,含水率就上升5%。物理模拟结果与油藏实际开发动态较为一致,能够较好地再现油藏不同开发阶段的动态变化,具有较强的应用性及预测能力。

The entirety development course of oilfields was researched by laboratory physical stimulation to establish a suit reasonable simulating approach..Development course of oil fields were simulated to reappear production characters,primary factors affecting elastic-drive and water-drive were identified and selected out and the influential mechanism was also verified and evaluated.Taking Es_2 formation of Shengtuo Oilfield as the example,factors contributed to elastic -drive and water-drive were outlined and evaluated.During elastic-drive phase,formation pressure dropped 0.5MPa and recovery ratio is merely 3%. During water-drive phase,recovery ratio is about 25%and the water content will move upward 5%with crude oil extracted 1%.The test result corresponded with the oil production performance.The physical analogue,which can express the transient change in different production stage,may be widely applied to reservoirs production simulation and forecast.