Dense oil carbon dioxide huffing-puffing simulation method and device, and storage medium

Abstract

The embodiment of the specification provides a dense oil carbon dioxide huffing-puffing simulation method and device, and a storage medium. The method comprises the following steps that a reservoir geological parameter and an initial inversion parameter characteristic value are acquired, and a gridding embedded component discrete crack prior model is established based on the reservoir geological parameter as a carbon dioxide huffing-puffing numerical simulation model; based on a well production mode, the embedded component discrete crack prior model is subjected to carbon dioxide huffing-puffing production historical data numerical simulation, and a production dynamic parameter simulation value is obtained; a covariance matrix of the production dynamic parameter simulation value and an actual production dynamic parameter value is determined, and a Kalman iteration gain is obtained accordingly; the initial inversion parameter characteristic value is adjusted according to the Kalman iteration gain, and a new inversion parameter characteristic value is obtained; and when the numerical simulation meets iteration termination conditions, the currently obtained inversion parameter characteristic value is used as a reservoir characteristic parameter fitting result. The embodiment of the specification can improve accuracy and efficiency of dense oil carbon dioxide huffing-puffing simulation.

Description

technical field [0001] This description relates to the technical field of tight oil and gas reservoir development, in particular to a method, device and storage medium for simulating tight oil carbon dioxide huff and puff. Background technique [0002] During the development of oil and gas reservoirs, tight oil CO 2 During throughput production, automatic history fitting can be performed on production history data, and the characteristic parameters of tight oil can be obtained through automatic parameter inversion, so as to establish accurate tight oil CO 2 Throughput models to use to guide future production. [0003] Due to the low porosity and permeability of tight oil reservoirs, fracturing and related methods are usually used to increase the recovery of tight oil reservoirs. After fracturing, the geological conditions of tight oil reservoirs are similar to those of fractured oil reservoirs, although the matrix permeability The rate is very low, but due to the existence...

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Problems solved by technology

Although the existing discrete fracture numerical models can accurately describe fractures, the amount of calculation is too large. Due to the constraints of current computer hardware and numerical simulation technology, the simulation efficiency is low, and it cannot be practically applied to industrial reservoirs.

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