Technology description
Passive microseismic monitoring is performed by registering microseismic emission signals on the day surface using a seismic sensors located above the emission sources. Technology uses specialized data processing, based on cluster calculations. Processing and interpretation is carried out in a specially developed software package “Fracloc”.
The MicroseismicCSP technology can solve the following tasks:
- Hydraulic fracture monitoring.
- Fluid injection monitoring.
- Well drainage area m
- Fault-block structure detection near the borehole.
- Frac ports activity monitoring after hydraulic fracture.
Acquisition system. Designing an acquisition system based on a modeling stage, during which a three-dimensional depth-velocity model of the environment is built. In consideration with surface conditions (orohydrography maps, infrastructure, potential noise sources such as drilling new wells, pumps, etc.) the optimal acquisition system is proposed.
Equipment. The technology can use all types of field equipment and positioning systems, both cable and cable-free; Tests and commercial work have been carried out on all major types of equipment on the market: SCOUT, RefTek, Sercel, Wireless Seismic, SGD, GS.
Used equipment it should provide data acquisition with the following parameters:
- synchronous registration with an error less than 100 microseconds;
- sampling frequency bigger than 1 kHz;
- frequency range 5-150 Hz;
- Continuity of registration up to 30 days.
Registration. The seismic antenna consists of standard seismic sensors. The low cost of receiving, transmitting and processing microseismic data, combined with the high mobility of the field team and the fast deployment time of the equipment, allows you to quickly obtain interesting information about the observed process, characterized by high resolution.