Technology of water plugging in advance for bottom water reservoir

In process of natural mining of bottom water, bottom water coning is caused by some factors such as oil-water contact without interlayer, bigger mobility, and so on. And how to control bottom water speed effectively has direct influence on degree of reservoir recovery. Therefore, technology of water plugging in advance is studied. Bottom water rising is delayed by beating chemical clapboard in oil-water contact before reservoir launched, sweep efficiency of plugging agent is improved by adjustment of plugging agent performance and injection parameter under condition of productive interval without pollution and effective barrier is formed by adequate distribution in oil-water contact. Laboratory research on water plugging opportunity, development of high viscosity and strength complex gel plugging agent and optimization of technology design is done. Site application shows that, water plugging for bottom water reservoir, which can achieve low water content commission of oil well, higher recovery degree and is better than anaphase management after bottom water coning, should be considered preferentially.