黄16井区水气交替注氮参数和注氮方案优化研究

Selecting Nitrogen Injection Parameters and Its Injection Scheme of Water Alternating Gas (WAG) in Wellblock Huang 16

通过组分数值模拟方法针对黄场油田黄16井区开展了水气交替方式氮气非混相驱的注入方式、注入周期、注氮量和注入气水比等注入参数优化研究。优化结果为:注气方式为水气交替注入,注气周期为30d,单井注入量为目前注水量的1.2倍,气水比为1.2:1,,并进一步研究了黄16井区水气交替方式氮气非混相驱方案,推荐黄新33井水气交替方式注氮气方案为现场实施方案。

The injection mode of nitrogen immiscible displacement by WAG, parameters of injecting cycle, nitrogen injecting volume and injected gas-water ratio are studied through compositional numerical simulation. The result of study is that the injecting mode is WAG, the injecting cycle is 30d, the injection volume of a single well is 1. 2 time of current water injection, gas-water ratio is 1. 2:1, and the injection scheme of nitrogen immiscible displacement by WAG in Wellblock Huang 16 is studied further. The injection scheme of Well Huangxin 33 is recommended for field application.