Physical simulation system and method for steam flooding heavy oil recovery in vertical and horizontal wells

Abstract

The embodiment of the present application provides a physical simulation system and method for heavy oil recovery by combined steam flooding of vertical wells and horizontal wells. The system includes: a physical reservoir model for simulating thin-bed super heavy oil; Flat well production well and at least one vertical well injection well; steam injection device, used to inject steam into the reservoir model, so as to carry out steam flooding heavy oil recovery; gas foam injection device, used for when the horizontal well production well produces When the water content of the fluid reaches a preset value, gas foam is injected into the reservoir model; the fluid collection device is used to receive the fluid produced by the horizontal well production well; the data acquisition device is used to collect and record experimental data; The experimental data includes pressure, temperature and flow. The embodiments of the present application can reduce or prevent steam channeling during combined steam flooding of vertical wells and horizontal wells.

Description

Physical simulation system and method for steam flooding heavy oil recovery in vertical and horizontal wells technical field The application relates to the technical field of heavy oil exploitation, especially to a kind of vertical well and horizontal well combination steam flooding heavy oil exploitation Physical simulation systems and methods. Background technique Heavy oil is recognized as one of the most promising and most realistic replacement resources in the 21st century, and heavy oil has conventional crude oil in addition to In addition to its characteristics, it is also an indispensable raw material for the production of key products in important fields such as national defense, aerospace, metallurgy and pharmaceuticals. irreplaceable. With the deepening of development, the development of heavy oil has shifted to the development of difficult-to-recover reserves. Reservoirs are the main part of hard-to-produce heavy oil reserves, with reserves reaching 700 ...

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Problems solved by technology

Studies have shown that for thin-layer ultra-heavy oil reservoirs, when vertical well steam flooding is used for development, the single-layer controlled reserves are low; horizontal well steam flooding can significantly increase the oil drainage area, expand the swept volume of steam, and enhance the conductivity , to reduce the production pressure difference and improve the oil recovery of the reservoir, but the development of thin-bed ultra-heavy oil with horizontal wells is more susceptible to the influence of channeling channels, resulting in problems such as uneven production of horizontal well sections and high water cut

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