1. Overview
The main characteristics of tight oil reservoir is low permeability (less than 0.1mD), reservoir fluid can not flow basically; at present, the tight oil reservoir mainly adopts the way of depletion development, which shows the formation energy decline quickly, production decline quickly and other related problems. On imbibition, scholars at home and abroad have carried out some experimental studies, but most of them are limited to the imbibition of crude oil and water in the medium and high permeability reservoir matrix. There are few experimental studies on imbibition of matrix and fracturing fluid in ultra-low permeability and tight reservoirs. Therefore, the indoor imbibition experiment of low permeability and tight oil reservoir has certain guiding significance for improving the recovery rate and development effect of this kind of reservoir. The device is designed with the following functions:
1 It can simulate the imbibition experiment under different formation temperature and pressure conditions.
2 Simulation of the use conditions of the tight oil reservoir imbibition oil recovery method and the control factors of the tight oil reservoir imbibition oil recovery.
3 In order to meet the qualitative needs of the experiment, the design method of visual container is adopted.
4 In order to improve the accuracy of the experiment and the error of the experimental data, a computer real-time data acquisition system is used.
Main technical indicators of 2.
1. Experimental temperature: RT ~ 100 ℃/0.5 ℃, working size: 600 × 600 × 500mm.
2. Precision electronic balance: 210g/1mg, which can hang the core connection device and collect real-time data.
3. The imbibition kettle can observe the phenomena in the whole imbibition experiment process, φ Φ120*200mm, pressure resistance 1000PSI.
4, analysis and processing software to meet the online directional data acquisition, analysis and calibration functions.