METHOD FOR MONITORING WELL BOTTOM PARAMETERS AND DEVICE FOR CARRYING OUT SAID METHOD Russian patent published in 2021 - IPC E21B47/13 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, in particular to transmitting well bottom information via an electromagnetic communication channel to a surface. In particular, a method for monitoring well bottom parameters in a well drilled in rock formations and protected by casing pipes is proposed comprising the installation of a transceiver sensor for bottom parameters and transponders in a well located on drilling pipes and operated by electromagnetic waves generated by electric dipoles extending along a line of communication formed by casing and drilling pipes and by rocks surrounding the well to the ground receiving antenna and transceiver and also creating prior to the installation of the transceiver of bottom parameters and transponders into the well a mathematical model of the communication line on the basis of information on the parameters of the casing and drilling pipes, electrical dipoles and rock surrounding the well, determining the required values for the characteristics of the communication system for monitoring and mathematical modelling of the communication line. The mathematical modelling of the communication line is carried out for all sections thereof: between the transceiver of the bottom parameters and the first transponder, between the subsequent transponders, between the last transponder and the ground receiving antenna. During the mathematical modelling process, the amplitude-frequency characteristics of each of the communication line sections, the frequency bands and the values of the signal transmission carrier frequencies are determined. According to said data, the current values of the received characteristics of the communication system are calculated and compared with the required ones, in case of discrepancies exceeding the given ones, the parameters of the communication lines are modified, thus optimizing them so as to ensure that the current values of the characteristics coincide with the required values with the required accuracy, after which a bottom transponder and transceivers are installed in the well, creating a communication line at the same time, the parameters of the sections of which coincide with the parameters of the communication line sections defined in the last step of the mathematical modelling. The optimum values of the signal transmission carrier frequencies are set for the bottom parameter transceiver and for each of the transponders and the well bottom parameters are monitored.

EFFECT: technical result consists in creating a communication system with the required information characteristics: acceptance rate, data transmission speed, communication range and others.

8 cl, 13 dwg