【摘要】 以大庆朝阳沟油田朝119-52井区蒸气驱试验区地质模型为基础,应用CMG软件中的STARS模块进行数值模拟,改变泥岩隔层的厚度以研究不同净总厚度比对水驱后油藏转蒸气驱开发效果的影响.结果表明:随着净总厚度比的减小,向隔层的热损失比例急剧增加,导致油层热利用率下降,累积油气比减小;当净总厚度比小于0.15时,累积油气比小于0.13,净收益小于0,为无效生产.因此,对于水驱低渗透油藏,转蒸气驱油的净总厚度比下限值选为0.15.更多还原

【Abstract】 On the basis of Chao 119-52 well zone’s steam flooding testing zone geological model in Daqing Chaoyanggou oilfields,we applied STARS modules of CMG software to perform numerical simulation,changing the thickness of isolated mudstone layer to study the impact that the ratio of net pay and total pay for water flooding reservoir changing to steam flooding development effect is studied. The results show that,with the reduction of the ratio of net pay and total pay,the heat loss proportion to isolated mudstone layer increases sharply,leading to the decline of heat utilization rate,and the ratio of cumulative oil and gas reduces. When the ratio of net pay and total pay is less than 0.15,the ratio of cumulative oil and gas is less than 0.13,and net income is less than zero,so the production is invalid. Therefore,for water flooding reservoir,the lower limit value for changing to steam flooding is 0.15.更多还原