Research Of Oil Well Plugging Technology With Bottom Water Reservoir In Chang2Area Of Ansai Oilfield

In Ansai oilfield, Chang2reservoir of Zhangqu well block has strong bottom water, due to the impact of the measures of reservoir reconstruction, the stratum energy, differential pressure and others factors, making the oil-water interface deformation tapered rising and oil wells have high rate of production. For the current development status, it is necessary to identify water breakthrough law, to improve and complete well plugging technology, to optimize the parameters for interrelated technology, to expand the number of wells which have high efficiencies, to reduce production cost and to enhance oil recovery. All the above have important significance for the stable production and the efficient development of oilfields.In this paper, analyzing static and dynamic data of wells in Zhangqu well block by characteristic curve method, in-depth study the mechanism and law of bottom water coning in bottom water reservoir, analyze bottom water coning factors impact on well production and the reasons and characteristics of water production in oil wells by using numerical simulation methods. Intensive studying barrier function mechanism, critical production of bottom water coning, critical production time mathematical model and the water blocking agent system, and analyzing the current blocking agent measures water plugging effect, the plugging agent matched with the effects of the strata in the study area, finding out the reason of different plugging agent water plugging effect. In view of the special strata in the study area, according to the plugging agent implementation and effects in recent years, to develop blocking agent formula by experiment. To carry out the construction parameters optimization work in order to improve the oil well water plugging effect, and use numerical simulation method for predicting the outcome of measures of plugging agent formulate and construction parameters.