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在采油生产过程中,孔隙压力的降低导致了油藏的压实现象,反过来,这又改变了作用在油藏上的应力。通常,预测油藏的压实以及所产生的后果是根据在单向应变条件下进行的实验数据所得出的,即在衰竭过程中没有边界应变。Groningen气田的现场数据表明,油田的应力明显偏离了单向应变条件下的应力轨迹。实验数据表明实际的应力轨迹对衰竭产生的压实状况有非常强烈的影响。通过考虑油藏和实验中相关的变形机理,我们讨论了油田压实情况所产生的后果。新的Groningen 现场数据和实验结果解释了以单向实验为依据得出的预测的压实和沉降与现场测得的压实和沉降之间的差别,使用新的应力轨迹,压实情况和沉降的预测值与测量值相吻合。
During oil production, the reduction of pore pressure leads to the compaction of the reservoir, which in turn changes the stress on the reservoir. In general, the prediction of reservoir compaction and the resulting consequences are based on experimental data under unidirectional strain conditions, ie, no boundary strain during failure. Field data from the Groningen field show that stresses in the field deviate significantly from the stress trajectories under unidirectional strain. Experimental data show that the actual stress trajectory has a very strong effect on the compaction conditions resulting from the failure. By considering reservoir and experimental deformation mechanisms, we discuss the consequences of field compaction. The new Groningen field data and experimental results explain the differences between predicted compaction and settlement based on one-way experiments and on-site compaction and subsidence, using new stress trajectories, compaction and settling The predicted and measured values match.