准噶尔盆地车排子地区排2井区开发方式数值模拟研究

Numerical Simulation Study of Development Modes in Wellblock PaiⅡ in Chepaizi Area of Junggar Basin

针对排2井的试油试采特征,分析了试油效果差的原因:目的层注汽压开了油层,与下部水层窜通,从而造成注蒸汽后,只出水不出油的结果;储层存在中等偏强水敏,由于注汽前时间紧,没有针对性地开展油层保护技术研究,在注汽过程中对储层造成伤害,影响了试油效果。在保持油藏构造主体格局、储集层基本特征与流体相态性质不变的前提下,本文利用数值模拟的方法设计了4套开发部署方案,并对每个开发方案的预测结果进行了对比,从而得出最佳的开发方案,并利用采收率预测方法对油藏进行预测,确定油藏含水为98%时的采收率为55%,油藏最终的开发效果较好。

The reasons for poor test results were analyzed according to test characteristics of Wellblock Pai Ⅱ.One reason was injecting steam opening the target reservoir,collaborates with the bottom water,so as to the formation produces only water but not oil.Another reason was the reservoir exists medium-high water sensitivity,and due to tight schedule before steam injection,the impacts of steam injection process on the formation damage were not investigated,resulted in poor test results of oil well.Four sets of development programs were designed by using of numerical simulation methods,and the results of each development program were compared.Development effect of the reservoir is predicted with the methods of oil recovery forecast.When water cut is 98%,the oil recovery is 55%,the ultimate development effect of the reservoir is better.