IMPROVING SEPARATE LAYER WATER INJECTION EFFICIENCY BY USING WATER INJECTION PIPE STRING TECHNIQUE

With the advancement of oilfield development,the contradictions among the water layers are becoming more and more outstanding.For ensuring valid water injection and maintaining positive cycle,usehighly efficient separate layer injection pipe string technologyto solve some problems in water injection well caused by well depth,high pressure and complex oil reservoir,etc..And the technology is improved and perfected step by step,thus,injection-production system of reservoir has being become balanced.The application of the technology suppies a valid path for decreasing the contradictions of water injection layer and improving the development effects of oil layers.