Employees of CJSC Gradient took part in the largest oil and gas exhibition in North Africa - EGYPT PETROLEUM SHOW 2019 (EGYPS.
At our booth, we talked about approaches to solving the problem of reducing the risks of drilling empty wells (LFS method), monitoring the development of fields (FWL method), as well as the experience of successfully solving complex problems.
The exhibition was memorable for its lively and friendly atmosphere, interesting meetings with representatives of Egyptian and world oil and gas companies, their genuine interest in our technologies.
We hope that the negotiations will mark the beginning of mutually beneficial and fruitful cooperation in the Egyptian market.
4-7 February in Moscow hosted the international geological and geophysical conference and exhibition "Geoirgia-2019". Among the speakers were specialists from CJSC "Gradient".
In the section "VSP and microseismic research" the report was read by the head of the IAC, Ph.D. Vasily Alexandrovich Ryzhov, on the topic: "Assessment of the sustainability of determining the parameters of microseismic events using the maximum likelihood method under conditions of inaccurate knowledge of the environmental model."
In the section "Processing of seismic data," the report was read by geophysicist Bulat Daniovich Ziatdinov, on the topic: "A method of filtering natural vertical-directional longitudinal waves based on a 3-component array of seismic sensors."
Chief geologist of CJSC "Gradient" I. R. Sharapov and head of the information analytical center V. A. Ryzhov gave lectures for students of the Almetyevsk State Petroleum Institute (AGNI) "Interpretation of results of microseismic monitoring of hydraulic fracturing from the surface» and "Microseismic technology for fracture monitoring and assessment of natural fracturing". The lectures were based on the experience of CJSC "Gradient" in hydraulic fracturing monitoring. Students listened to lectures with interest and asked many questions.
PhD.CJSC "gradient"have participated in the poster session with the report" opportunities of microseismic research in the design of the horizontal wells and multistage hydraulic fracturing, for example, wells of JSC Tatneft". The seminar brought together hydraulic fracturing engineers, mathematicians, physicists of leading Russian oil companies and scientific organizations. New opportunities of integration of hydrodynamic modeling of fields and modeling of hydraulic fracturing were widely discussed at the seminar. The microseismic monitoring helps to determine the actual size and orientation of fractures in hydrodynamic model.
Leading Engineer of CJSC Gradient, Ph.D. Ryzhov Dmitry presented the report: "Detection of thin inclined seams in the section with the help of full wave inversion in the low-frequency spectral range” at the scientific and practical conference on the geological exploration and development of oil and gas fields "Geomodel 2018". The report exited great interest of the audience and many interesting questions were asked.
The chief geologist of Gradient, Ilshat Sharapov, made a presentation: "Assessment of active natural fracturing of rocks based on microseismic monitoring observations from the surface" at the international scientific and practical conference "Modeling of the geological structure and development processes - the basis for the successful development of oil and gas fields ".
September 4-6 in the exhibition center of the Kazan Fair was held "Tatarstan Petroleum and Gas Chemistry Forum" timed to the 75th anniversary of the beginning of industrial development of oil fields in Tatarstan. Within the framework of the forum, the exhibition exposition of the petrochemical industry was presented and an international scientific and practical conference was held in which Gradient CJSC took part. Within the framework of the exhibition, we presented a film about our company and an information stand with work technologies.
June 24, 2018 passed away the founder of Gradient CJSC, our leader and mentor,
In our memory, he will forever remain as a far-sighted and resolute leader who knew how to find an approach to the worker on the profile and to the leaders of the largest oil companies. Lately, he was engaged in projects to launch offshore passive seismic surveys - it was his long-standing dream, from the time when he worked on Sakhalin island. Unfortunately, he could not do that... We hope that we will fulfill his dream after all.
We visited the STACK 24 data center in Kazan, with the prospect of hosting our supercomputers here.
STACK 24 is an innovative project of the Center for Data Storage and Processing, which corresponds the high requirements for the availability of Uptime TIER III data, which has been in operation since 2013.
In St. Petersburg was the 8th international geological and geophysical conference and exhibition "St. Petersburg 2018. Innovations in Geosciences - the time of discovery." The exhibition brings together world-renowned scientists and practicing professionals from Russia, and the worlds geological community. This scientific event gives an opportunity to meet to exchange experiences, ideas and establish new business contacts.
For 13 years Gradient CJSC has been successfully operating in Russia and abroad. strong>
Our ecological microseismic technologies are in demand among the largest Russian oil and gas companies at the stages of prospecting, exploration and development of oil and gas fields.
The team of the company are professionals ready to meet the modern demands of oil and gas companies.
We wish our company to grow and develop, to benefit the Clients. Success in everything and achieve new heights!
An interview with the general director of Gradient CJSC Sergey Feofilov "From the geophysicist-operator to the general director" devoted to the forthcoming event of April 20-21, 2018 "Meeting of the graduates of the geofaca-2018" was published in the news line of the Kazan Federal University.
Gradient CJSC jointly with partners proposed the application of its technologies to ONGC at a brainstorming session in ONGC Rajahmundry Asset. The session was opened by ONGC Onshore Director V.P. Mahawar. The session was attended by Schlumberger, Halliburton, Weatherford and other worldwide service companies.
Gradient CJSC participated in the 12th International Conference and Exhibition on the title "Energy Through Synergy". Organizer of the event is SPG (Society of Petroleum Geophysicists). The conference was held in India, Jaipur.
Specialists of Gradient CJSC have delivered a course of lectures on seismic methods for constructing a geological model at the Almetyevsk State Oil Institute (AGNI).
The course of lectures consisted of 3 parts including the most popular methods of seismic research:
acoustic logging, offset vertical seismic profiling, seismic, passive low-frequency seismic, microseismic monitoring from the surface and from wells.
The first lecture. Introduction, generalizing seismic methods. Acoustic logging. VSP/OVSP.
Speakers: Ph.D. Ryzhov Vasily, Ziatdinov Bulat.
The second lecture. A fascinating lecture on seismic exploration, the history of origin, field work, equipment, processing principles, world trends.
Speaker: Galyautdinov Jalil.
The third lecture. The low-frequency seismic sounding (LFS) method for oil/gas prospecting, comparison of microseismic monitoring technologies from the surface and from wells. Monitoring of hydraulic fracturing, natural active fracturing, determination of the orientation of the minimum horizontal stress into the reservoir, geomechanics.
Speaker: Ph.D. Ryzhov Vasily.
Head of Information and Analytical Center of CJSC Gradient Ryzhov Vasily in the ROSGEO holding on the conference Geomodel-2017 presented a report
"The experience of conduction of Low-frequency seismic sounding technology (LFS) test works on the shelf of the Sea of Okhotsk (Sakhalin Island)"
15-19 of may a EAGE Seminar «Microseismic hydraulic fracturing monitoring" was held in Kazan1. Known approaches to localizing the microseismic events and define its parameters - E.V. Birialtsev* (Gradient Technologies LLC)
2. Refinement of geomechanical characteristics of the medium based on the results of microseismic monitoring - E.V. Mokshin*(Kazan Federal University, Gradient Technologies LLC) 3. Surface microseismic monitoring - M.R. Kamilov* (Gradient Technologies LLC), V.A. Ryzhov (Gradient CJSC)
The delegation of Skolkovo, who visited Ecuador in the framework of the business mission of the cluster of energy-efficient technologies, offered its technologies to the Mexican state-owned company PEMEX ("Evgeniy Biryaltsev: "In Ecuador, a window of opportunity opens for us"), and the delegation visited the headquarters of Yachay and met with the leadership of the "city of knowledge" ("Skolkovo on the equator") - the most ambitious project in Latin America to grow innovation in the place where Ecuadorian slaves grew sugar cane in colonial times.
Head of Information and Analytical Center of CJSC Gradient Ryzhov Vasily in the Institute of Physics of the Earth of Russian Academy of Sciences on the conference SEISMIC TECHNOLOGIES-2017 presented a report
"Full-wave location of microseismic events from the surface. Theoretical aspects and some results"
The Gradient CJSC together with "Avia Engineering" Ltd., developed an unmanned aerial vehicle (Drone) for the following tasks:
1) Reconnaissance of the territory;
2) Operative downloading of records from wireless seismic equipment .
CJSC "Gradient" reported on the experience of using state-of-the-art professional solution from AMD -- AMD FirePro™ W9100 GPUs to solve seismic wave propagation problems. See full article “Innovative Graphics Compute Helps Oil and Gas Industry” published on AMD community website.
ÑJSC "Gradient" took part in the Sixth EAGE Workshop on Passive Seismic, held 1-3 February 2016 in Muscat, Oman. The company`s specialists have joined debates and discussions on the development of microseismic monitoring technologies, and presented a poster presentation on the theme «Application of Full Wave Location technology with determining seismic moment tensor of events for Hydraulic Fracture Monitoring and Natural Fractures»
Gradient presented the report "Experience applying the full-wave location method for microseismic HF monitoring in horizontal well in Western Siberia". Authors:V.A.Ryzhov, I.R. Sharapov, E.V. Birialtcev, S.A. Feofilov, M.R. Kamilov, D.A. Ryzhov, A.I. Stepanov (Gradient CJSC)
In the Perm region were carried out geological and geophysical studies by two independent technologies of JSC "Gradient": br>
1) The low-frequency seismic sounding which was used for prospecting and exploration of hydrocarbon deposits; Br>
2) microseismic monitoring of natural fractures which was used for identification of active fracturing and determination of priority directions of natural fractures.
For the first time in the process of location a symmetric tensor was determined for each event by Full-Wave Location technology.
May 27, 2015 in Moscow hosted the second Russian oil and gas summit "Hard-to-Recover and Unconventional Reserves", which was attended by over 230 leading experts and industry experts of the more than 100 organizations.
With the report "Natural fracture direction observation and monitoring of daylight surface fracturing: challenges, solutions and application" was made deputy general director of science and new technologies Biryaltsev EV.
May 26-27, 2015 in Atyrau hosted the third international conference "Atyraugeo 2015" on "The Caspian region: problems of structure and oil and gas potential of deep and complex genetic nature of hydrocarbons." The conference was organized by the Public Association "Kazakh Society of Petroleum Geologists" with the support of the Ministry of Energy of the Republic of Kazakhstan and Association "KazEnergy."The conference was attended by 184 delegates from Kazakhstan, Russia, USA, China.
The chief geologist of CJSC "Gradient" Sharapov Ilshat Rashitovich made the report "Innovative passive microseismic methods in oil and gas industry - application experience in Russia".
The Gradient applied its own Full-Wave Location technology on the oil field in Western Siberia. The depth of the oil reservoir is 2400 m. Br> br> The complexity of the work lies in the fact that during almost all fracturing stages drilling equipment operated on the same cluster of wells. Synthetic calculations showed that the impact of drilling operations reduce the amplitude sensitivity of the location system only in 3 times. This result indicates a high stability to surface noise of Full-Wave Location technology of JSC "Gradient". Br> br>
Each event is characterized by spatial coordinates and represented as oriented segments, which characterizes azimutal orientation of subvertical cracks
The company participated in a meeting on import substitution in the field of hardware and technical facilities for offshore exploration production in the "sea-land" transit zone and adjacent territory. The meeting was held in St. Petersburg on the territory of the Ministry of Industry and Trade of the Russian Federation.
The chief geologist of Gradient CJSC Sharapov Ilshat Rashitovich made a report on the topic of "Possibilities of native LFS (Low-Frequency Seismic Sounding) microseismic method application in prospecting and exploring hydrocarbon deposits on the seas’shelf, in the transit area and the adjacent land".
The company is using a new computer center which includes a supercomputer on the basis of GPUs (50 Tflop / s), an operating systems virtualization server, applications and database server. All modules of data center are commutated through a high-speed InfiniBand.
Traditionally the employees of Gradient CJSC take part in the International Scientific-Practical Conference "Galperin Readings - 2014" on the topic: Innovative technologies and theoretical and experimental researches in the integrated land-borehole seismic and microseismic.
The conference is hold in Moscow in Central Geophysical Expedition with information support of EAGO, EAGE and magazines: Geophysics and Geophysical messenger of EAGO, Seismic Technologies, Oil GasExposition, First Break, Messenger of Central Commission for the development of mineral deposits “Rosnedra”, Nefteservis and Neft.Gaz.Novatsii, Devices and systems of exploration geophysics.
1. The head of the information-analytical center Ryzhov Vasiliy with the report "Fracture survey on the base of full-wave numerical simulation of wave propagation and maximum likelihood method";
2. Lead Software Engineer Ryzhov Dmitry with the report "Passive seismic exploration method (Low-Frequency Seismic Sounding) for complex and small hydrocarbon deposits".
The company made a report "The location method of microseismic emission on the basis of full-wave numerical simulation with high noise stability for monitoring of hydraulic fracturing from the surface" at the 16th Scientific and Practical Conference European Association of Geoscientists and Engineers (EAGE) for exploration and development of oil and gas "Geomodel-2014", which took place on 8-11 September in Gelendzhik.
Speaker: R&D director Birialtsev EV
Have been published mathematical basics of FULL-WAVE LOCATION technology which was developed by Gradient CJSC company in the Journal "Devices and systems of Exploration Geophysics" (3) 2014. Focus: GEOPHYSICAL MONITORING of hydrocarbon deposits. Title of the article: "The use of the maximum likelihood method for hydraulic fracture microseismic monitoring".
CJSC Gradient company moved to a new office at: 29, Nikolay Yershov Str.,
Kazan, 420045, Republic of Tatarstan, Russia Phone/fax: +7 (843) 20-01-099
Comfortable jobs, a modern conference room, air-conditioned room for a super-computer.
We are glad to see you in our office!
RIA News TV series "matter of technology" has released a TV show about JSC "Gradient" - Kazan scientists have learned to look for oil, "listening to the land".The founders of JSC "Gradient" from Kazan invented a new method of searching for oil and gas deposits. Scientists "listen" on the ground noise with high-precision instruments and processing the data, give the oil companies to forecast the location of deposits.
To clarify passive low-frequency microseismic methods, authors of the article "Low Frequency Passive Seismic - Myths and Reality" tried to explain the fundamental aspects of this research. The article was published in the all-Russian scientific-technical Quarterly Journal of "Devices and Systems Exploration Geophysics". Low Frequency Passive Seismic - Myths and Reality.
First of all sensors are going to be used to solve problems of monitoring hydraulic fracturing and field development monitoring, as well as other problems related to the localization of the sources of seismic emission in the environment. LE-3DLite also be used in the classical works by the method of low-frequency seismic sounding (LFS)
Scientific-practical conference held OOO "NOVATEK NTC" Ugra Appraisal Center subsoil and Tyumen branch of Euro-Asian Geophysical Society (TyumenOEAGO) with the support of the Department of Mineral Resources for the UFD. p>
Scientific representatives of JSC "Gradient" spoke on "Microseismic research - perspective direction of geophysics in the search, exploration and exploitation of oil and gas fields". p>
The report focuses on the physical basis of the method of low-frequency seismic sounding method of processing and interpretation of the microseismic field, and an assessment of edge effects. p>
Company took part in the conference "Galperin Readings 2012" on the theme: "Innovative technologies and basic research in the on-land-borehole seismic and seismology" br>
OJSC "CGE" IPE, LLC "GEOVERS" with information support: br>
EAGC, EAGE and magazine First Break, Geophysical Journal EAGC and Exposition Oil Gas p>
The speakers were: br> deputy general director for science and new technologies Ph.D. Biryaltsev Eugene V. and br> The head of analitic center Ph.D. Ryzhov Vasily. br>
Opportunity to study the upper part of section by brute force search based on full-wave numerical simulation
(V.A.Rizhov, E.V. Birialtsev, M.R.Kamilov)
The possibility of studying mechanical characteristics of low velocity zone and the upper part of section based on full-wave numerical simulations. Article represents the description of the method and its results with conclusions about its further development.
EXPERIENCE IN APPLICATION OF BACKGROUND MICROSEISMS VELOCITY DISTRIBUTION ANALYSIS METHOD IN STUDYING THE LOCAL STRUCTURE OF THE SEDIMENTARY COVER
(E.V. Birialtsev, E.V. Mokshin, D.V. Firstov)
Article discusses the method of studying the velocity characteristics of the geological media in the range of 0-5 km depth by analyzing of background microseism. Also there are represented the description of the method and the results in the area with complex geological structure. Conclusions about application of the method.
"Economy and Energy today" journal published an article of Rais Khisamov - Deputy Director General - Chief Geologist of OAO Tatneft:
Despite of considerable diversity of currently available local forecasting methods, to analyze and evaluate efficiency of these methods in the Republic of Tatarstan on the areas of "Tatneft" using the exploration drilling results is possible for the following surveys:
high-precision gravimetric surveys - "GONG" method (efficiency - 71% ), GGHM method (efficiency - 72%), "Neyroseysm" technology (efficiency - 81% (in case of positive forecast)), the LFS method (efficiency - 80%).
Here you can find full version of the article (page ¹ 94-98).
Microseismic surveys - successful geophysical methods
for prospecting, exploration and development of oil & gas fields
N.Y. Shabalin, E.V. Birialtsev, I.R. Sharapov, V.A. Ryzhov
(Gradient JSC, Kazan)
JSC "Gradient" – is the geophysical company which conducts microseismic surveys for assessment the hydrocarbon potential of geological objects and solves technological problems in hydrocarbon fields. The company is the developer and owner of the patent on the Low Frequency Seismic Sounding (LFS) technology. The company is actively use supercomputer processing complex, which allow to implement full-wave 2D and 3D-numerical simulations of wave propagation in the geological media.
During the existence of the company, 96 wells were drilled by recommendations of LFS method, 82 of them confirmed the forecasts. Success rate of LFS method more than 85%.
To improve the efficiency of exploration it is necessary to integrate of 2D and 3D seismic surveys with microseismic surveys using LFS technology, that allow to identify hydrocarbon deposits and create a complex that has no analogues in world practice.
Further development of MS researches will allow control the exploration of hydrocarbon deposits.
Nikolay Shabalin - General Director;
Eugeny Birialtsev - Deputy General Director on science and innovative technologies, PhD;
Ilshat Sharapov - Chief geologist;
Vasiliy Ryzhov - Head of analytic center, PhD.
The 14 of January 2012 in the High Technology Technopark IT-park (Kazan) was held the annual meeting of the Ministry of Informatization and Communications of the Republic of Tatarstan. During the meeting President of the Tatarstan Republic Rustam Minnikhanov was acquainted with the best innovative projects.
Minister of Information and Communication Republic of Tatarstan Nikolai Nikiforov and Head of Analytic Center "Gradient" JSC Vasily Ryzhov introduced technology of low-frequency seismic sounding. During the presentation of LFS technology President noted the achievements and proposed to actively implement the technology in oil industry.
High Technology Technopark IT-park
"Gradient" JSC presentation display stand. Representative - Head of Analytic Center JSC "Gradient" Dr. V.A. Ryzhov
President of the Tatarstan Republic Rustam Minnikhanov (on the right). Minister of Information and Communication Republic of Tatarstan Nikolai Nikiforov (on the left). Photo obtained from "Business Online" electronic newspaper
Representation of LFS technology results in Stereo 3D
JSC "Gradient" won the "Top 50 Innovative Ideas for Tatarstan" competition in the category "Start of Innovations". Our company represent the project "Supercomputer software in natural microtremor field analysis for oil and gas prospecting and exploration.
The ceremony was attended by President of Tatarstan Rustam Minnikhanov and honorary academician, vice-president of the Russian Academy of Sciences, Nobel Prize winner Zhores Alferov.
Geography of Competition includes Moscow, St. Petersburg, Ekaterinburg, Maryland (USA), and others
1. MODELING OF THE NATURAL VERTICALLY DIRECTED BODY WAVES GENERATION PROCESSES IN GEOLOGICAL MEDIA
M.R. Kamilov*, V.A. Rizhov**, E.V. Birialtsev **, D.V. Berezhnoj* (* Kazan (Volga Region) Federal University, ** "Gradient" JSC, Kazan, Russia)
Abstract. The report reviews interdisciplinary problem relevant to the search method hydrocarbon a low-frequency seismic sounding, based on the study of resonance properties of geological media. Problem is in the representation of the process of natural formation of a vertically directed body waves in a geological medium. In this survey was suggested and simulated a scattering mechanism of surface Rayleigh waves on inhomogeneities with Poisson's ratio different from the enclosing environment. The result of simulation of the upper part of the section as a set of layers consisting of elements with a random Poisson's ratio is observed a natural formation of a vertically directed volume waves.
2. THE COMPARISON OF TIME REVERSE MODELING AND DIFFRACTION STACKING FOR THE TIME-SPATIAL LOCALIZATION OF MICROSEISMIC EVENTS
E.V. Mokshin*, D.V. Berezhnoj*, E.V. Birialtsev ** (* Kazan (Volga Region) Federal University,
** Gradient JSC, Kazan)
Abstract. This article is referred to the problem of source localization in visco-elastic medium using the results of surface seismological observation. There were investigated three technologies: Time Reverse Modeling, Diffraction stacking and Stacking correlation. The calculation is based on FEM.
Theses of conference reports can be viewed
Library consists of more then hundred articles referred to the applications of low-frequency seismic methods. Also you can find there some articles of our company. All publications are available for download.
Library is available only in Russian version of site.
X annual international conference Galperin readings-2010 commemorating 90 year anniversary of Y.I.Galperin
LOW-FREQUENCY MICROSEISMIC STUDY IN THE TIME DOMAIN IN THE EXPLORATION FOR HYDROCARBON DEPOSITS.
E.V. Biryaltsev, V.A. Ryzhov, D.A. Ryzhov, I.R. Sharapov
Abstract. Known methods of spectrum analysis of natural microseisms in the exploration for hydrocarbon deposits. We propose a modification of these methods, in which the MS analysis is performed in the time domain by means of correlation analysis of the observed MS and MS model obtained by numerical simulations for different variants of the geological structure at the point of the study. We present the proposed method of analysis and present the results of its application to the area of research in the Republic of Tatarstan.
Our company passed the final checking of the quality management system, the system of ecological management and the control system in the labor protection and professional safety (ISO 9001:2008, ISO 14001:2004, OHSAS 18001:2007)
8-11 November at the 10th annual international Conference & Exhibition “Galperin readings – 2010”. Innovative technologies and fundamental researches in 2D, 3D, VSP well-surface exploration and seismology. (Moscow, Central Geological Expedition) The special subject of the conference is the integration of surface and borehole seismic surveys with data processing and interpretation software (3D+VSP), and also problems of applied seismic based on fundamental theory. The 9th of November 2010 JSC “Gradient” will take part in conference and will represent the report on a theme: "LOW-FREQUENCY MICROSEISMIC RESEARCHES IN TIME DOMAIN FOR INVESTIGATION OF THE HYDROCARBONS DEPOSIT " (Å.V. Biryaltsev, V.A. Ryzhov, D.A. Ryzhov, I.R. Sharapov)
International scientific conference: “Innovative technologies - the basis of the Strategy public corporation Gazprom Neft”. E.V. Biryaltsev and I.R. Sharapov represent the article “Application of low-frequency seismic sensing technology on the objects of “Gazprom Neft” Company within the West Siberian petroleum province”
The report of Eugeny V. Biryaltsev (Ph.D., Deputy General Director, JSC Gradient)
Release of the special edition of «Seismic Technology» journal covering the ANCHAR microseismic infrasonic technology of oil and gas prospecting. The edition was dedicated to the 15th anniversary of “ANCHAR” Company. JSC “Gradient” took part in preparing of journal’s informational content submitting the article “Modeling of ANCHAR effect in the low-frequency seismic sounding” (E.V. Biryaltsev, A.A. Vildanov, E.V. Eronina, V.A. Ryzhov, D.A. Ryzhov, N.J. Shabalin). The article referred to the ANCHAR effect-based method of the low-frequency seismic sounding and provides information about phenomenology of an effect and it’s theoretical background, cites the results of numerical modeling in comparison with actually observed results, describes main technological aspects of the method and brief geological results of performed works.
JSC “Gradient” team congratulates the colleagues from “ANCHAR Co” with their 15th Anniversary and wishes the development of their technology, efficiency improvement and financial well-being!!!
7-9 December 2009, JSC “Gradient” participated in the “INTERNATIONAL PETROLEUM TECHNOLOGY CONFERENCE (IPTC)” with the report “Experience in Low-Frequency Spectral Analysis of Passive Seismic Data in Volga-Ural Oil-Bearing Province”
Nikolay Y. Shabalin (General Director)
Eugeny Birialtsev (PhD, Deputy General Director on Science and Innovative Technologies)
XVIII Gubkin Readings took place in Russian State University of Oil and Gas on 24 -25 November 2009. E.V. Biryaltsev represented the article “Experience in spectral analysis of the microseisms in hydrocarbon exploration” (E.V. Biryaltsev, N.Y. Shabalin, A.A. Vildanov, E.V. Eronina, V.A. Ryzhov, D.A. Ryzhov, R.I. Khusnullin).
More than hundred geophysicists visited the workshop in this year, including participants from the USA and France, delegation of “Rosneft” and “GEOTECH Holding”. JSC “Gradient” represented the report «Theoretical aspects and experience of low-frequency microseismic researches» (E.V. Biryaltsev, Ph.D., Deputy General Director). Read more: http://www.e-geo.ru/ru/events/95.html