Method for measuring and adjusting oilfield injection well by utilizing indication curve

Abstract

The invention relates to a method utilizing an indicative curve for testing and adjusting an oilfield water injection well, which mainly solves the problem of high cost of the existing test and adjustment of a water well. The method is characterized in that two tests are respectively and sequentially carried out according to the whole well injection allocation amount and 150 percent of injection allocation amount; according a flowing pressure value and a flow capacity value gained through the tests, an overflowing pressure loss value is checked out to gain a stratum average pressure figure and a moisture absorption coefficient of the stratum in contrast with a technologically designed water nozzle curve picture board ; when one water nozzle is kept unchanged and the injection allocation amount satisfies the geology requirements, the water nozzle curve picture board is checked to gain the overflowing pressure loss value, and then the flowing pressure value and the overflowing pressure loss value in front of the water nozzle of the layer section are obtained, and finally, the diameter of the water nozzle are obtained. The method can realize fast test and adjustment, does not change the original water injection pipe column technology and the water injection technology, and has no cost input.

Description

Technical field:

[0001] The invention relates to a method for measuring and adjusting water injection wells in oil fields, in particular to a method for measuring and adjusting water injection wells in oil fields by using indicating curves. Background technique:

[0002] Water injection is an effective way to maintain formation pressure and increase original recovery in oilfields, and well monitoring and adjustment is an important construction process to maintain sufficient and good water injection in wells. Water nozzles need to be replaced in the process of testing and adjustment of water wells, and the replacement of water nozzles takes up most of the effective working time in the process of testing and adjustment. To determine how to replace water nozzles, oilfields now generally use trial or empirical methods, and the efficiency of replacing water nozzles is low. , It takes an average of 3 to 4 days of effective working time to debug a water injection well in three inte...

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