METHOD FOR SEISMIC MONITORING OF THE DEVELOPMENT OF OIL AND GAS CONDENSATE FIELDS IN THE NORTH OF THE RUSSIAN FEDERATION Russian patent published in 2021 - IPC G01V1/00 G01V1/38 G01V1/22 

FIELD: geophysics.

SUBSTANCE: invention relates to the field of geophysics and can be used to clarify the structure of oil and gas condensate fields, increase the efficiency of the process of their development, as well as to improve the safety of the development of oil and gas condensate fields. A method for seismic monitoring of the development of oil and gas condensate fields in the north of the Russian Federation is proposed, including three-dimensional seismic exploration and the construction of a reservoir model based on its data with prediction of the orientation of systems of subvertical cracks. The method provides for the stationary placement of a set of towed streamers at each bush of producing wells. The arrangement is carried out according to the geological model of the field, built on the basis of the results of three-dimensional seismic exploration, geophysical studies and studies of existing observation and production wells. At the same time, the minimum number of installed seismic sensors and their step in each seismic zone are justified, which guarantee the detection of spatial migration of hydrocarbon fluids along the trunks of the producing and research wells of the bush into the overlying horizons capable of accumulating hydrocarbon fluids in volumes sufficient to accumulate them in technogenic deposits. The towed streamers of the kit are connected to a controlled point (CP) of the gas well cluster telemetry system (GWCTS), which is part of the automated process control system (APCS) of the gas field, and installed on this bush of producing wells. The CP controller with an individually set discreteness polls all sensors of the well bush associated with the conduct of technological processes of the field and the seismic sensors of the towed streamers kit connected to it. This survey is carried out by the controller with a frequency set by the Geological Survey of the gas producing enterprise. The controller records in its memory the information received from the sensors, which is transmitted via the radio communication channel of the automated process control system during a survey session by it to the control point (CP) of the GWCTS. From the GWCTS CP, through the communication channels of the information and control system of dispatching control (ICSDC) of the gas producing enterprise, the obtained seismic data are transmitted for preliminary processing and analysis to the Geological Survey of the enterprise, which implements the program of seismic monitoring of the field territory. When signs of the beginning of this process are detected, the Geological Survey of the enterprise sends the received data via radio communication channels or the Internet to the Institute for Oil and Gas Problems for a detailed analysis and proposal of management solutions to reduce the risks of potential consequences of the formation of man-made deposits, full-scale 3D seismic exploration of the station, using its standard equipment.

EFFECT: increase in the efficiency and informative value of monitoring the development of the field and assessing the possibility of the formation of man-made deposits, reducing the risks of geoecological incidents during the operation of the field.

3 cl, 1 dwg