凝胶颗粒复合型堵水调剖技术在坪北油区的应用

The application of compound water plugging and profile control technology of gel particle in Pingbei Oilfield

根据安塞油田坪北油区地质特征,从堵水调剖机理出发,研究出了适合坪北油区特点的凝胶颗粒复合型堵水调剖剂配方及相应的施工工艺技术。运用技术在坪北油区选择相应的区块进行了堵水调剖现场试验,试验证明调剖后注水状况得到明显改善,改善了注入水的流向,提高了区块注水开发水平;控制了油井含水上升、防止了油井暴性水淹;改善了油层纵向吸水严重不均情况;提高了注水波及效率和驱油效率,达到了最终提高采收率,增油减水的目的。该技术还具有"堵而不死"的特点,适合对坪北油区及类似的油田进行堵水调剖,能取得较好的堵水调剖效果。

According to the geological property of Pingbei Oilfield and the principle of water plugging and profile control, compound profile control agent and corresponding process technique are developed. The test of water plugging and profile control has been done in some wells of the Pingbei Oilfield. It shows that the agent can effectively improve the injection water condition and change its flowing direction of injecting water, upgrade the level of injection water; control the increase of water in the well, avoid explosive flooding of oil well, improve the condition of disequilibrium of vertical absorbing water on the oil layer, increase the sweep efficiency of injection water and the displacement efficiency. The goal of upgrading recovery efficiency and decreasing volume of the water can be realized with this technique . The technique has also the specificity of 'seal but keep certain permeability', which can be used in water plugging and profile control in Pingbei or comparative oilfield, and can achieve good results.