Seeing more clearly subsurface is a significant challenge for companies exploring on the UK Continental Shelf and is essential to unlock the 3.5 billion barrels of oil and gas already discovered. Our flexible, non-intrusive technology helps companies more accurately locate and target hydrocarbon deposits. It increases certainty for planning and drilling wells, helping exploration success at a fraction of the cost of conventional methods.
Our Ocean Bottom Seismometer (OBS) technology is designed to "listen" to the subsurface environment and reliably record low-frequency signals. The hermetically sealed device hosts a three-component low-frequency seismometer, a low-noise amplifier, a recorder, a battery, a horizontal level stabilisation system, and a gyroscope. Our OBS devices are deployed from vessels in a free-fall fashion and submerged in a grid formation using embedded GPS. They record a range of measurements before an automatic resurfacing system recovers each device. The data is collected onboard the vessel and a report is compiled. The design of the automatic resurfacing system method allows the user to quickly deploy and recover the devices in depths of up to 6,000m.
The LFS technology was successfully tested offshore with the use of submersible and re-surfacing nodes. A hermetically sealed device hosts a three-component low-frequency seismometer, a low-noise amplifier, a recorder, a battery, a horizontal level stabilization system, and a gyroscope. The devices are recovered via an automatic re-surfacing system, which unfastens the ballast, leaving it on to the seabed to eventually turn into environmentally harmless sand. The method allows the user to quickly install and remove the devices from depths of up to 6000m.
TenzorGEO provide cutting-edge and cost-effective seismic technologies which enhance the productivity of exploration and development of oil & gas fields. In that scope, some extended passive seismic technologies, comprising a number of different, yet complementary techniques that are encapsulated through the collaborative research between the industy and academia in Russia.
Low-Frequency Seismic Sounding method (LFS) is based on the effect of increased low-frequency energy (1-10Hz) in the spectrum of microseisms over the hydrocarbon pools, which was discovered in 1989. In 2002-2009, the effect was studied by JSC "Gradient" on over 100 areas in course of the research studies and exploration operations. Testing of the technology based on such a vast amount of data in different geological conditions has confirmed the theoretical understanding of the nature of anomaly associated with multiple reflections (resonance) of seismic waves between the surface and the oil and gas deposit.
Full-Wave Location method (FWL) is based on estimation of seismic tensor components, which maximize likelihood function. For this is necessary to know useful signal (simulated responses from deep source). Useful signal is a full-wave process registered on three components on observation points located at the surface. The responses are calculated by 3D numerical simulation of wave processes in viscoelastic media. Numerical model is created using information from structural maps and VSP data.
The first investigations by the LFS technology were conducted on the Romashkinskoye oil field (Republic of Tatarstan, Russia) in 2003. There were a series of experimental works to test the physical background of the method. From 2003 to 2011 we continue investigations on this oil field, also we collect data from another oil fields on the South-Tatar arch and from the western side of Melekess depression (Novo-Elhovskoe, Sarapalinskoe, Uratminskoe, North Zyuzeevskoe, Glazovskoe, Zarechnoye deposits, etc.) The researches were also conducted outside the Republic of Tatarstan - in the Republic of Udmurtia, Republic of Kalmykia, Republic of Komi, Samara and Orenburg regions, Yamalo-Nenets, Khanty-Mansi autonomous Okrug of Tyumen Region, and Bulgaria.
TenzorGEO improve exploration success by accurately locating hydrocarbon deposits.
Used in parallel with existing solutions it can enhance interpretation and provide comparison data. This extra layer of precision data helps increase certainty and support better decision-making for planning and executing drilling activities.
Our pioneering micro-seismic survey technology allows precise well-positioning, at a fraction of the cost of conventional seismic survey providers. The significant improvement in accuracy also offers a potential saving of millions in drilling costs.
On recovery of the device, it unfastens the ballast, leaving it on the seabed to eventually turn into environmentally harmless sand. We don’t use hazardous or reactive chemicals, explosions or air guns, cables or remotely operated vehicles or vessels.