HH油田注入水与储层流体配伍性研究

HH油田属于典型的低孔特低渗储层油田。注入水与储层流体的配伍性对注水开发方案设计极为重要。通过开展HH油田注入水与C8、C9储层地层水的水质测定、结垢趋势预测和静、动态配伍性实验以及注入水与储层原油的配伍性实验,明确了HH油田注入水与C8、C9储层流体配伍性。结果表明,HH油田注入水与C8、C9地层水不配伍,存在碳酸钙垢趋势,且随着注入水比例的增加、温度的升高,碳酸钙结垢越严重,注入水与地层水比例为9∶1时结垢指标SI值为2.354,SAI值为2.873,结垢程度严重;注入水与地层原油之间配伍性良好。该研究结果对HH油田注水水质指标标准制定、注水开发方案制定及水质处理等研究提供了依据。

Research on Compatibility of Injection Water and Reservoir Fluid in HH Oilfield

HH oilfield belongs to low porosity,low permeability oil reservoir.Compatibility of injected water and reservoir fluid is extremely important to water injection development plan.In this paper,the water quality of injection water and formation water of reservoir was determined,scaling trend was predicted,the compatibility test of injected water with reservoir oil was carried out,the compatibility of HH oilfield injection water and well C8,C9 reservoir fluid was confirmed.The results indicate that the compatibility between injection water of HH oilfield and formation water of well C8,C9 is not good,there is the trend of calcium carbonate scaling;With the increase of injection water ratio and rising of the temperature,calcium carbonate scaling is even more severe.When the ratio of injected water to formation water is 9:1,the value of scaling index(SI) is 2.354,the value of scaling index(SAI) is 2.873,the degree of scaling is serious.The compatibility of injection water and formation oil is well.