Method for determining response polymer using quantity of oil production wells

Abstract

A method for determining the oil production well response polymer using quantity comprises the following steps that the static vertical splitting coefficient formulas and planar splitting coefficientformulas of polymer injection wells are established; through the injection quantities, the static vertical splitting coefficients and the planar splitting coefficients of the polymer injection wells,the response injection quantities split to peripheral communicating oil production wells are calculated; with the oil production wells as the center, the response injection quantities which are splitto the oil production wells by the polymer injection well communicating with the oil production well are accumulated; the difference values between the actual liquid production quantities and the response injection quantities are calculated; the threshold values of the difference values are set, according to a greedy algorithm, the oil production wells with the difference values smaller than the threshold values are sought, the splitting coefficients of the polymer injection wells communicating with the oil production wells are fixed, then oil production wells with the differences of the communicating splitting value fixing number and the communicating polymer injection well number being one are searched from small to large according to the difference values, if the oil production wells exist, the splitting coefficients are amended according to the difference values of the actual liquid production quantities and the response injection quantities till no amendable splitting coefficientexists; through a quantum leapfrogging algorithm, other unfixed splitting coefficients are optimized; and according to the splitting coefficients, the response polymer using quantities of the oil production wells are calculated.

Description

Technical field: [0001] The invention relates to a method for splitting the amount of polymer injected from a polymer injection well into a connected oil production well during the polymer injection flooding process in the five-point well pattern of the oil field. Background technique: [0002] Polymer flooding technology is one of the most widely developed tertiary oil recovery technologies in my country. Injecting polymers can improve the mobility ratio, increase the swept volume of injected water, and improve the development effect of homogeneous oilfields. After more than ten years of industrialized production of polymer flooding, a set of practical analysis and evaluation methods for the development effect of polymer flooding blocks have been gradually formed. However, with the continuous increase of industrialized blocks, the reservoir conditions and well pattern Well spacing and injection parameters vary greatly, and it is difficult to integrate unified polymer inject...

AI Technical Summary

Problems solved by technology

However, after years of injection-production development in the oil field, the lithology, physical properties, and various dynamic and static parameters describing the properties of the oil reservoir have changed. Numerical simulation methods based on laboratory physical simulation experiments or expert experience combined with relevant professional knowledge involve many Many parameters are difficult to determine and accurate, and only approximate or estimated values ​​can be used. Therefore, there is a certain deviation between the predicted results and the actual production data, and the universality is not strong.

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