A method for numerical simulation of condensate oil damage of different well type of narrow channel gas reservoir

Abstract

A method for numerical simulation of condensate oil damage of different well types in a narrow channel gas reservoir includes such steps as dividing pseudo-component of gas well flow and phase state fitting to obtain fluid PVT data required by component model of gas reservoir; establishing a numerical simulation geological model according to the reservoir characteristics and boundary conditions ofnarrow channel gas reservoirs; by defining dimensionless fracture conductivity and grid size series refinement, simulating the fractures and importing the PVT data by numerical simulation software;by simulating the distribution of condensate saturation in different development wells, obtaining the law of condensate precipitation in different development wells of narrow channel gas reservoirs; establishing a black oil model to quantitatively characterize the condensate oil damage of different well types by comparing the cumulative gas production reduction range of gas wells. The invention can finely simulate hydraulic fracturing fractures, and can qualitatively and quantitatively evaluate the influence of condensate oil precipitation of different development well types on gas well productivity of narrow channel gas reservoirs.

Description

technical field [0001] The invention relates to the field of gas field exploitation, in particular to a numerical simulation method for condensate oil damage of different well types in narrow channel gas reservoirs. Background technique [0002] Condensate gas reservoirs have the characteristics of reverse condensation in a certain range of pressure and temperature. During development, retrocondensation occurs as a result of fluid phase changes when the pressure drops below the dew point pressure. When condensate gas wells are in production, the pressure drop near the wellbore is large, and the formation pressure near the wellbore is easily lower than the dew point. Therefore, serious retrocondensation damage is more likely to occur near the wellbore, resulting in a sharp drop in relative gas permeability and a decrease in gas well productivity. Reverse condensate in near-wellbore formations of condensate gas wells is a very important problem encountered in the development ...

AI Technical Summary

Problems solved by technology

At present, there is no systematic method for evaluating the impact of condensate oil precipitation on gas well productivity of different development well types in narrow channel gas reservoirs, and the development of gas reservoirs lacks the guidance of scientific numerical simulation methods

Images