Water injection technological process using three parameters test curve for layered pulling and running for water injection allocation

Abstract

The present invention relates to a water injection technological process by applying three parameter test curve for delamination casting and measure which belongs to the technical field of oil layer test in petroleum exploitation. In prior oil field development, the method of casting and measure includes nozzle exchanging method and water exchanging method. The existing method needs block measure and casting, test a point at every layer segment can only verify separate zone waterflooding volume and cannot select the mouth and obtain the test result. The method provided in the invention presets water volume of test points, and tests a plurality of points continuously by decompression method in water volume test of the same layer segment or at each test point. Test all layer segments at one time to obtain delamination instruction curve; calculate and select appropriate water nozzles according to different empirical formula of nozzle exchange method and water exchange method, and verify if qualified on site. The method of the invention in practical operation makes whole casting and measure process from complex and long periodic time to simple and short periodic time, which saves human labor and material resources, improves separate zone waterflooding qualify rate, and avoids artificial counterfeit.

Description

technical field [0001] The invention relates to a water injection process using a three-parameter test curve for layered fishing, testing and matching, which is a process for oil layer testing and oil layer layered water injection in petroleum development, and belongs to the technical field of oil layer testing in petroleum development. Background technique [0002] In current oilfield development, a separate injection well can be injected in several stages, such as two stages of one-stage injection, three stages of two-stage injection or four stages of three-stage injection. The level is the number of packers, and the section refers to the injection layer section, such as figure 1 shown. The water injection layer is divided into three property categories: uniform layer, restricted layer and reinforced layer. The average layer is the layer 30m 3 / d (30 cubic meters per day) water injection volume is less than, plus or minus 5m 3 , such as dispensing 30m 3 / d, water inje...

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Problems solved by technology

[0015] The above-mentioned process method needs to be blocked, measured and fished layer by layer, the energy recovery of the formation is slow, the construction period is long, and the labor intensity is high. Due to repeated work, it is easy to cause jamming accidents. In addition, there will be a big difference between the wellhead data and the downhole layered data. , it is not easy to find, forming a false impression

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