METHOD FOR DETERMINING THE REACTION RATE OF HYDROCHLORIC ACID WITH CARBONATE ROCK AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC E21B43/27 G01N7/18 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of oil and gas industry and can be used to select the optimal composition and concentration of the acid solution to stimulate oil production when treating the bottomhole formation zone. The method for determining the rate constant of the reaction of hydrochloric acid with carbonate rock contains a control system, including a personal computer and software that controls the operation of the installation. An acid solution is fed into the reactor with carbonate rock by means of a pump. A liquid thermal stabilization system maintains a constant temperature inside the reactor. Temperature sensors measure the temperature inside the reactor and inside the flow cooler, which reduces the temperature of the reaction products. An automatic piston gas flow meter measures the volume of released gas at a given constant pressure, controlled by an absolute pressure sensor. The data obtained is presented in the form of dependency graphs. The dependences of the volume of gaseous compounds in the reactor on time and the rate constants of reactions occurring with the release of gaseous substances on time are processed. The reaction rate constants are determined. The installation for determining the rate constant of the reaction of hydrochloric acid with carbonate rock contains a reactor configured to load a sample of carbonate rock and automatically supply the reagent from the reagent tank using a dosing pump connected to the line of the liquid thermal stabilization system and with a flow-through cooler connected by a line to an automatic piston gas flow meter, on which an absolute pressure sensor is located between them, temperature sensors installed inside the reactor and a flow cooler, and a control system including a personal computer and software.

EFFECT: invention provides the possibility of selecting the optimal composition and concentration of the acid solution to improve the efficiency of acid treatments of wells.

2 cl, 3 dwg