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桩35块封闭断块油藏存在油水井较少、注采井网不完善、地层能量补充困难的问题,针对这些问题,采取二氧化碳吞吐方式对桩35-15井进行增能开发。在注二氧化碳室内实验的基础上进行了地层流体相态拟合,为数值模拟提供了可信的参数;数值模拟结果表明采出油中C7+占据绝大部分,采出气中C1占据绝大部分,注入的CO2主要以气态形式采出;液态二氧化碳的周期注入量优化为60t。
There are a few oil-water wells in Block 35 block fault reservoirs, imperfect injection and production well pattern, and difficulty in replenishing formation energy. In response to these problems, we developed the stimulation of pile 35-15 with carbon dioxide huff and puff. Based on the experiment of carbon dioxide injection, the stratospheric fluid phase fitting is carried out, which provides credible parameters for numerical simulation. The numerical simulation results show that C7 + takes up most of the oil produced, and C1 takes up most of the production gas, Injected CO2 is mainly produced in gaseous form; the periodic injection of liquid carbon dioxide is optimized to 60t.