Numerical simulation method of ordinary heavy oil water-soluble viscosity reducer flooding

Abstract

The invention relates to the technical field of oil field development, in particular to a numerical simulation method for water-soluble viscosity reducer flooding in common heavy oil reservoirs. It includes: step 1, collecting the basic performance parameters and viscosity-reducing experimental data of the water-soluble viscosity reducer; step 2, performing trend line fitting on the experiment of reducing the viscosity of crude oil by the water-soluble viscosity reducer, and determining the fitting formula; step 3, Use the formula obtained by fitting to calculate the viscosity of the oil-water mixture under different mass concentrations of water-soluble viscosity reducers; step 4, calculate the weight factor of water-soluble viscosity reducers under different mass concentrations in the nonlinear mixing law; step 5, establish the water-soluble viscosity reducer Viscosity flooding reservoir numerical simulation model; step 6, adjust the weight factor of the water-soluble viscosity reducer, and fit the water-soluble viscosity reducer flooding core flooding experiment results with the calculation results of the reservoir numerical simulation until it conforms to the engineering calculation precision. The method is convenient and fast, requires few parameters and is simple to apply, and realizes the numerical simulation of water-soluble viscosity reducer flooding.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a numerical simulation method for water-soluble viscosity reducer flooding in common heavy oil reservoirs. Background technique [0002] The development methods of heavy oil reservoirs are mainly divided into thermal recovery method and cold recovery method. The thermal recovery method reduces the viscosity of crude oil by heating the reservoir and improves the fluidity of crude oil in the formation. Traditional thermal recovery methods include steam huff and puff, steam flooding, burning oil layers, SAGD, thermal composite development technology, etc. However, due to the high production investment cost of thermal oil recovery, the large pollution of steam boilers, and high technical requirements, the challenges faced by the low oil price situation are gradually increasing. [0003] In recent years, more and more attention has been paid to chemical methods to incr...

AI Technical Summary

Problems solved by technology

At present, only laboratory experiments and a small number of industrial tests have achieved good recovery factors, and they have not been widely used, mainly because the reservoir numerical simulation method of water-soluble viscosity reducer has not been established, and the reservoir engineering of this technology cannot be obtained. design, thus limiting the development of the technology

Images