渤海P油田高压注水解堵效果评价及影响因素分析

Study on Effect Evaluation and Influencing Factors of High Pressure Injection Unblocking in the Production Wells of P Oilfield,Bohai

渤海P油田部分压裂充填井生产数据未表现出无因次采油采液指数曲线特征,而是呈类似裸眼井的产液量递减趋势。针对此问题,研究分析了P油田的堵塞机理,提出高压注水解堵新措施。评价新措施的实施效果,分析主力层厚度占比、主力层压力、含水率、污染程度及注水压差等决定性因素,总结改善措施实施效果的方法及选井原则。

The production data of some fracturing and filling wells in Bohai P oilfield do not show the characteristics of following the dimensionless production fluid index curve,but the phenomenon of diminishing production of liquid in similar open holes.This paper analyzes the plugging mechanism of P oilfield,and innovatively puts forward the high-pressure injection hydrolysis blocking measures.The effect evaluation of the measures is carried out to analyze the decisive factors such as the proportion of main layer thickness,main layer pressure,water content,pollution degree and water injection pressure difference.The methods and well selection principles of the implementation effect of improvement measures are summarized.