Microseismic monitoring of oil & gas fields comprises of network of microseismic stations, main purpose of which is the detection and registration of very small level seismic events on the territory of oil & gas fields and mines, with further deep processing of seismic results and analysis of natural and induced seismicity. Microseismic monitoring service is provided by Zhanazhol Munai Service LLP on the basis of:
Competent interpretation of the results is the key to an effective response to possible risks associated with the consequences of induced seismicity
Microseismic monitoring helps to reduce the risk of industrial hazards, therefore, networks of continuous long-term observations stations on certain territories and information processing centers are being created to process the results in real-time and conduct analysis.
Currently, monitoring includes registration, further processing and interpretation of seismological data, based on the results of which are interpretations and forecasts are made. Monitoring is also divided according to the size of the monitoring area covered into: world — to assess the full picture of the planet, regional — to monitor a specific region and local — for a specific site (e.g. oil & gas, mines, etc.).
The applied tasks of this direction are considered to be the study of regional/local seismic activity of a certain territory or local area. They can be areas of nuclear power plants, hydroelectric power plants, oil and gas fields, mines, open pits, etc.
Seismic monitoring is an integral part of the production work of oil and gas companies, which is reflected in the requirements of the Code of the Republic of Kazakhstan No. 125-VI "On Subsurface and Subsurface use" dated December 27, 2017.
Microseismic monitoring allows:
Together, this makes it possible to study the dynamics of tectonic faults of the Earth.
Thanks to the available means of communication, it is possible to promptly notify officials of ongoing earthquakes and other seismic events, as well as timely response to such situations.
General data transmission scheme is shown in the figure.
Obtained results allow customers of Zhanazhol Munai Service LLP to assess the full picture of the seismic regime and establish a high level of information support.
Safety systems for essential structures such as nuclear and hydro power plants, oil and gas wells, mines, bridges and other facilities are not capable of operating at full capacity without microseismic monitoring. Countries of the European Union and many other countries of the world practice exactly such policy. At the same time, it is not taken into account whether the region or the territory where an important industrial object is located is earthquake-prone.
Development of the energy sector industry require microseismic monitoring of those areas of the earth's crust where energy facilities are located.
Real-time seismic monitoring is carried out through a network of seismic stations that are evenly distributed over the area under study or use existing stations covering the desired area.
Having identified seismic sources, their parameters are determined: the time in the hearth, the coordinates of the epicenter, the depth of the hypocenter and the magnitude. Next, instrumental data on modern earthquakes are used, which, when combined with information about historical earthquakes, allow for seismic zoning.
It is possible to outline seismogenic zones and assess the seismic risks of the territory on the basis of:
Automatic detection of seismic events
Automatic seismological centers perform an important and most difficult task:
It is possible to work effectively in real time only with the introduction of highly developed hardware and mathematical software, and it is precisely such equipment and software that the staff of Zhanazhol Munai Service LLP use.
Why is microseismic monitoring important?
To achieve these goals, advanced processing of recorded seismicity is critical.
Tectonic earthquakes are commonplace in places where elastic deformation energy accumulates. In these places, cracks begin to spread along the entire plane of the fault.
design of the monitoring system;
analysis of seismological conditions at observation points;
selection of recording equipment.
installation of equipment at the test site or the observed territory;
organization of telemetry.
deployment of an automated information system for collecting, processing, storing and analyzing seismological data;
adaptation of the information system to the conditions of the observed territory;
integration of information system interfaces into the customer's infrastructure.
launch of a monitoring system, processes for collecting, registering and analyzing registered information;
formation of information messages (urgent notifications, operational summaries, bulletins, catalogs, reports);
technological support of the project.
Experience of "Zhanazhol Munai Service" LLP in the provision of microseismic monitoring services:
continuous monitoring of the seismic state of Zhanazhol, Kenkiyak, Sev. Truva fields
continuous monitoring of the north-eastern part of the Caspian Sea on local and regional seismic events