Acid-rock reaction speed and kinetic parameter measuring device

Abstract

The invention relates to an acid-rock reaction speed and kinetic parameter measuring device comprising a gas cylinder, a bypass pipeline, a compressor, a reaction kettle, a heating ring, a stirring rotor, a magnetic steel, a micro motor, a core holder and a heat preservation layer. There are three types of core holder that can hold cylindrical core and plate core. According to the acid-rock reaction speed and kinetic parameter measuring device, the flow of acid liquid in reservoir and the chemical reaction between acid liquid and rock in the reservoir under different reservoir temperatures andpressure conditions can be simulated more truly. The device can be used for not only the simulation of the acid-rock reaction of single-plate core, but also the simulation of crack of double-plate core.

Description

technical field [0001] The invention relates to an acidizing fracturing production stimulation transformation technology in petroleum exploitation engineering, in particular to the measurement of acid-rock reaction speed and kinetic parameters, and belongs to the technical field of petroleum exploitation. Background technique [0002] With the rapid development of petroleum exploration and development technology, more and more sandstone or carbonate reservoirs with low permeability, poor physical properties and strong heterogeneity have been discovered. If these oil and gas reservoirs are directly developed, the output of a single well is extremely low, which cannot reach the standard of industrial oil and gas flow, that is, it does not meet the requirements of economic development. Therefore, oil and gas reservoir stimulation must be carried out. Acid fracturing, as an important part of oil and gas reservoir stimulation technology, has gradually been paid attention to by p...

AI Technical Summary

Problems solved by technology

The first point: each device does not fully consider the cementation of the core, that is, whether the core is loose. If the cementation of the core is poor, that is, the core is relatively loose, the core is not suitable for making flat plates, but only for cylindrical shapes; the second point: It is almost difficult to find related devices that can be used for both cylindrical cores and flat core experiments, and flat cores can simulate flat cracks; the third point: it is impossible to directly use the rotor speed to judge the acid flow rate or the judged acid flow rate The error is large; the fourth point: when carrying out the acid-rock reaction experiment of high viscosity acid liquid, the stirring in the reactor is insufficient, the mass transfer speed of the acid liquid is slow, the concentration distribution of the acid liquid is uneven, and the acid liquid at the sampling port cannot be real. It represents the change of the acid concentration in the reactor, and cannot represent the real flow of the underground acid, and the measured experimental data deviates greatly from the actual underground value

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