Visual model for simulating flowing of fluid in dense oil reservoir crack, preparation and application

Abstract

The invention provides a visual model for simulating flowing of a fluid in a dense oil reservoir crack, preparation and application. The visual model comprises a hexahedral core layer (1) made of dense sandstone, organic glass plates (2) laid on the two opposite surfaces of the core layer correspondingly and an epoxy resin shell (3) arranged on the outermost layer in a wrapping mode; washers (4) are further arranged between the core layer (1) and the organic glass plates (2) in a sandwiched mode, so that gaps (5) are formed in the hollow parts, between the surfaces of the core layer (1) and the organic glass plates (2) laid on the surfaces, of the washers (4); a liquid injection inlet (21), a first liquid outlet (22) and at least two pressure measuring openings (23) are formed in one of the organic glass plates, and a second liquid outlet (24) is formed in the other organic glass plate and corresponds to the first liquid outlet in position; and the gaps communicate with the outside world through the liquid injection inlet, the first liquid outlet, the second liquid outlet and the pressure measuring openings correspondingly.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular, the invention relates to a visualization model for simulating fluid flow in fractures of tight oil reservoirs and its preparation and application. Background technique [0002] With the advancement of science and technology and the improvement of human living standards, the world's dependence on and demand for fossil fuels (coal, oil and natural gas, etc.) are gradually increasing. In 2013, my country's energy import expenditure reached 300 billion US dollars, of which, the dependence on foreign oil has approached 61% of the "Twelfth Five-Year Plan" red line, and the national energy security situation is very severe. After decades of exploitation, major oil fields such as Daqing, Shengli and Liaohe have generally entered the development stage of high water cut period or even super high water cut period. According to statistics, the average comprehensive water content of all...

AI Technical Summary

Problems solved by technology

However, the model used in the above experimental research cannot truly reflect the physical and chemical change process of the contact between fluid and rock because the material used in the above experimental research is all plexiglass, which has certain limitations on the generalizability of the experimental results

In addition, tight reservoir rocks are rarely used as an important part of the model in the literature, so that the visualization of the flow laws in the fractures of tight reservoirs is still insufficient.

Images