| Water flooging in low permeability oil zone development project technical feasibility study is currently developing a research focus field; it is related to how to improve the oil recovery ratio, effectively extending the life of oil field development, reservoir of resources to achieve a reasonable and orderly development and other issues.In traditional reservoir engineering, reservoir permeability of conventional high injection wells and production wells in the effective aspects of a problem does not exist, so there is no injection on the reservoir to determine the effectiveness of the system indicators. As the dense low-permeability reservoir lithology, and pore throat more complex structure, the role of liquid to solid and strong pressure gradient and the presence of other factors, resulting in resistance to such a large reservoir seepage, effective stress system set up difficult, there water well into difficulties, production wells are not effective, the production decline significantly and so on. In order to develop effective low-permeability reservoir, the need for this type of injection and reservoir development for full validity of the argument, finding effective methods of evaluation and indicators, and gives the appropriate technology policy.In this paper, taking the Wa Cun oilfield as an example, proposed a low-permeability oil zone injection and water injection project evaluation of the effectiveness of the problem, analyze the effectiveness of international development on water status of theoretical method, the injection of taken to determine the validity of indicators, and on low-permeability oil zone water injection project in the usefulness, necessity and technical feasibility of proposed ideas, the actual verification by the project, demonstrated the low-permeability oil zone effectiveness of water development projects, as water injection in low permeability oil zone to provide a meaningful reference value. |
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