A Method of Measuring and Adjusting Water Injection Wells in Oil Fields Using Indicating Curves

Abstract

A method for surveying and adjusting water injection wells in oil fields by using indicator curves. It mainly solves the problem of high cost of the existing water well surveying and adjustment. It is characterized in that: according to the injection volume of the whole well and 150% of the injection volume, two tests are carried out successively, and according to the flow pressure value and flow value obtained from the test, the overcurrent pressure loss value is found out by comparing the flow nozzle curve chart of the process design, and the obtained The average pressure of the formation and the water absorption coefficient of the formation; when keeping a certain water nozzle constant and meeting the geological requirements of injection volume, check the water nozzle curve chart to get the value of the overcurrent pressure loss, and then get the value that should be before the water nozzle in this layer. Flow pressure value and flow pressure loss value, and finally get the diameter of the faucet. This method can realize rapid measurement and adjustment, without changing the original water injection string process and water injection process, and without 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...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the high cost and low efficiency of existing water well testing and adjustment, the present invention provides a method for using indicator curves to monitor and adjust oilfield water injection wells. This method can realize rapid testing and adjustment without changing the original water injection string process and process, and no cost input

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