Latest Events

Vadodara Chapter of SPG (Society of Petroleum Geophysicists) and APG (Association of Petroleum Geologists) organized a series of technical webinars on 10th& 12th September 2020. The objective of the lecture series was aimed towards knowledge sharing amongst the geo-scientific community with an active industry-academia collaboration. The sessions were chaired by Patron, SPG&APG, Vadodara Chapter, ED-Basin Manager Shri H. Madhavan and active participation from members of SPG and APG Vadodara, students from MS University and Kutch University.

The first technical talk on “Principles of Gravity in Petroleum Exploration” was delivered by the guest speaker Sh. J N Prabhakarudu, an Ex-ONGCian, a Domain Expert in the field of Gravity & Magnetic and other non-seismic methods, having rich experience of more than three and a half decades. He has authored three technical books and to his credit has a patent on Microgravity Method for Petroleum Identification in his name.

The session commenced with a brief address bythe SPG Patron Shri H. Madhavan, wherein he welcomed the guest speaker and exhorted the young executives for a proactive and a research oriented approach.

The technical talk by Sh. Prabhakarudu, dealt with different case studies pertaining to gravity anomalies in Cambay, Saurashtra and Vindhyan basins, and their utilities in hydrocarbon prospecting. He also elucidated various advanced techniques in gravity anomaly surveys, viz. Micro-gravity, Borehole gravity, 4D gravity and Full tensor gravity gradiometry.

Glimpses:Talk on Principles of Gravity in Petroleum Exploration

Two technical talks were delivered by distinguished guest speakers from Academia on 12th September 2020,Prof. M. G. Thakkar, HOD, Dept. of Earth and Environmental Science, KSKV Kutch University, and Prof. Dhananjay Sant, MS University Baroda. The online sessions commenced with a brief welcome address by Shri H.Madhavan.

Glimpses:Inaugural session Technical Sessions on 12th September 2020

The first technical talk was on the “Geology of Kutch Basin”by Prof. M.G. Thakkar. Having vast experience and deep understanding of geology Kutch area, he began with explaining the physiographic divisions of Kachchh region.The area is an excellent example of a tectonically controlled landscape, whose physiographic features are a manifestation of the earth movements along the tectonic lineaments of the Pre-Mesozoic basin configuration, which was produced by the primordial fault pattern in the Precambrian basement. Physical features of Kachchh are characterized by the contrasting occurrences of extensive plains and highlands with rugged topography.

  •   The Ranns
  •   The low lying Banni plain
  •   The Hilly region
  •   The southern coastal plains

Prof. Thakkar also elaborated extensively about the general stratigraphy of the region, and then delving into the tectonic settings of the Kachchh Basin.

Physiographic Divisions of Kachchh Region

Tectonic Map of Kachchh Region

The second technical talk was on the topic, 'Microtremor Study (HVSR) in Kutch Basin' by Prof. Dhananjay Sant. Heelucidated his research work on Microtremor-Horizontal to Vertical Spectral Ratio (HVSR) technique, as a tool to map the extension of rock outcrop/features in subsurface, and to demarcate distinct rheological contrasts up to shallow depth of 2000m. Microtremor surveys use ambient noise as the signal. Their ability to generate rapid single station records at a required resolution, and the cost effective operations, are some of the incentives of using a microtremor survey.

Prof. Sant then presented his research work in Kachchh region, a maiden attempt to map shallow subsurface rheological interfaces laterally across the Banni Plains and to decode geometry of the antecedent faults associated with the Kachchh Mainland Fault using the microtremor method.

Prof. Sant further clarified that the ambient noise encapsulates fundamental resonant frequency of the sediment layers. These resonant frequencies derived from the microtremors show strong correlation with the velocity of the Rayleigh waves and the thickness of the sediments. For a given fundamental resonant frequency, there exists an empirical relationship between the depth of an interface and the velocity of seismic waves (Vs) for the given interface.

Geological and geomorphological map
of Kachchh Peninsula

Comparison of fundamental resonant frequency0.9604 Hz and 0.271 Hz
with Q-T and M-B interface along Deep Banni Core

The event culminated with the concluding remarks from SPG Patron Sh. H. Madhavan, who thanked the guest speakers for such insightful talks and emphasized in more such Industry Academia collaborations. The event was a grand success attended by more than 130 participants.

President SPG Shri Rajesh Madan, GGM (GP) and Vice President Shri G Ganeshan CGM (Geol) and the Basin Office were instrumental in making the event successful. The vote of thanks was given by Sh. Sanjay Kumar, Secretary, SPG Vadodara Chapter. The event was ably compered by Mr. Vipul Chawla, Jt. Secretary, SPG Vadodara.

SPG Mumbai Chapter organised a technical webinar titled “Fundamentals on Multicomponent” on 21st August 2020 at SPIC-ONGC, Panvel. The session is a part of continuous and relentless efforts of SPG to share ideas and experiences to the geo-scientific community and to express & exchange views on fundamentals on Multicomponent.

The session was chaired by Shri S. K. Sharma Officiating President SPG Mumbai Chapter. Shri K. Vasudevan, Vice President APG Mumbai Chapter was the Chief Guest. SPG Mumbai Chapter Office bearers, Geoscientists from different G & G companies like Schlumberger, Emerson etc. and students from different Universitieshad taken part in the webinar.

Geophysical field party GP-16

Shri M. K. Jain, the learned speaker has a vastwork-experience in ONGC for 36 years. He worked very extensively for Reservoir Characterization for 4 years. He worked 28 years in Processing at different centres including GEOPIC, Jorhat, Baroda,Mumbai in ONGC. He Contributed for HC discoveries in many exploratory locations. He worked for a quite long time at Multicomponent technology in Cambay Basin and one of the Pioneer of this technology in ONGC.

Objectives of the Technical Presentation :

  •   Describing the basic elements of the multicomponent seismic processing flow and their benefits.
  •   Describing different multicomponent seismic acquisition systems.
  •   Describing the characteristics of different wave modes.
  •   Orientation analysis
  •   Coupling compensation
  •   Rotation
  •   Splitting of Shear Waves
  •   CCP binning using Variable Gamma
  •   PZ summation
  •   Noise attenuation (e.g. shear on vertical)
  •   Produce a list of challenges, where multicomponent seismic can provide an uplift
  •   Listing of areas where multicomponent seismic might further contribute to the advancement of seismic for E & P
  •   Case Studies of Padra, Kalol fields of Cambay Basin, Assam Arakan Frontier Basin & D1 field of Mumbai Offshore Basin.

Shri P. R. Balak, Vice President SPG Mumbai Chapter made the opening remark of the technical session. He said that focus to imbibe recent advancements in Multicomponent acquisition and processing in India should be our focussed area to work upon.Shri K. Vasudevan, President, APG Mumbai Chapter elaborated the exploration challenges in Western Offshore Basin.

He was also very much enthusiasticabout the processing outcome of recently acquired multicomponent survey in Western Offshore Basin.

The webinar witnessed a prolonged Question & Answer session from the enthusiastic audience and Mr. Jain explained patiently all the queries in detail with his baritone voice. Shri S K Sharma,President,SPG Mumbai Chapter emphasised the simple, detailed approach of Mr. Jain in explaining the basic ideasof Multicomponent Seismic Survey, which itself is a challenging technology.

Mr. Pritam Bera, young executive skilfully anchored the program and delivered the vote of thanks.

Team SPG
Mumbai, Chapter

SPG Ahmedabad chapter organized a trip to Geophysical field party GP-16 camping at Valod area, Gandhinagar on 16th March 20

Geophysical field party GP-16

The objective of the field trip was to provide an insight to the members the concepts a 3D seismic data acquisition. The trip provided an opportunity to geologist, reservoirs engineers apart from geo physicists a ONGC, GERMI and GSPC to understand the finer details of field party functioning. Party Chief and the party members took keen interest and apprised the participants about the steps involved in Acquisition and on field processing. The activities were demonstrated live in the field.

The fundamentals of Seismic data acquisition, the objective of the survey, the geometry of the survey was explained and illustrated in a very simple but exhaustive way. The daylong field trip proved to be very educative and enriching experience to all the participants. SPG members got actively involved in technical discussions and got their doubts cleared

The trip ended with a parting note to the Party Chief and the entire crew of GP-16 for the extra efforts taken by them for explaining and demonstrating the field activities.

The chapter expresses its deep appreciation and is thankful to all of them. Thanks are due to the coordinator from the Basin for facilitating the trip. The chapter acknowledges with thanks HGS, Baroda for having granted the necessary permission for the trip.

SPG – Ahmedabad Chapter

SPG and APG Vadodara chapter organised a geological field trip to Narmada North, Kevadiya, on 1st February, 2020. The fieldwork was conducted in the Narmada River section near Navagam village.

SPG & APG Team members at the onset of the field trip.

The objective of the fieldtrip was to provide an exposure on the geology of the Cretaceous Bagh Group sequence in Lower Narmada valley. It gave an opportunity to study the detailed lithostratigraphic divisions, boundaries of the units and an opportunity for appraisal of the vertical and lateral lithologic variations. Around 80 members of SPG & APG Vadodara chapter actively interacted with Professor Satish Patel and his team (Assistant Professor and Research fellows) from Maharaja Sayajirao University who guided the entire field trip.

Prof.Satish Patel briefing the participants in the field.

Cretaceous Bagh Group

The Bagh Group rocks are deposited in the ENE-WSW trending pericratonic Narmada rift and represent a complete cycle of sea-level change. The Navagam section is ~307m thick and exposes all the member of the Bagh Group except the Men Nadi Limestone Member and the Mohanfort Sandstone Member. The succession here is tectonically disturbed, moderate-steeply dipping.

The Bagh Group rocks here dips SE towards the Statue of Unity and are intruded by numerous dikes and sills of Deccan Traps. Numerous faults are observed in the area genetically related to the strike-slip faulting in the basin. The succession here is uplift along the faults bounded by Deccan Trap on all the sides.

Glimpses from field

The daylong field trip proved to be very educative to all the participants , it gave an insight on the exposures and geology of the Lower Narmada valley coupled with the enrichment on the spot with the vast experience of Prof. Patel.

Team SPG & APG, Vadodara chapter felicitating Prof. Satish Patel on successful completion of the trip.

Participants thanked Professor Satish Patel from MSU who guided the entire field trip with his valuable inputs. Shri S. S. Singh, CGM (GP) gave away memento to Prof. Patel.

Participants enjoying delicious at a local Temple.

Organizers acknowledge ED-Basin Manager & Patron SPG-APG, Shri H. Madhavan for encouraging and facilitating the tour. The reconnaissance was done by Prof S K Patel from MSU and Shri Bhupendra Tauk, Secretary APG, Shri Sanjay Kumar, Secretary & Shri Rajesh Upadhyay, Treasurer SPG, Vadodara Chapter on 25th January 2020. Shri Rajesh Madan, President, SPG and Dr. A. K. Singh, Vice President, APG were instrumental in organizing the trip. Thanks are also due to all the participants.

SPG/APG   Vadodara Chapter

Society of Petroleum Geophysicists – India, Jorhat Chapter organized a guest lecture on 26.11.2019 at ONGC, Jorhat on the topic “Shale Oil & Gas exploration in India vis-a-vis International arena”. The talk was delivered by Shri Arun Kumar, Ex-Executive Director of ONGC and attended by over sixty-five G & G professionals and SPG members from ONGC Jorhat.

Session started with welcome address and brief introduction about the objective of the program by President of SPG India, Jorhat chapter- Shri Vishal Shastri, GGM (GP). While introducing the topic President, SPG said that the shale oil & gas exploration is a game changer in the HC production history of The USA, which turned from net importer to self-reliant and tending towards net exporter. He emphasised that such interactive sessions are noble initiatives which give an opportunity for Knowledge Sharing and interaction of young with experienced executives. Shri Arun Kumar delivered the talk on'Shale Oil & Gas exploration in India vis-a-vis International arena'. The participative interaction by the house made the talk fruitful and interesting.

Glimpses of the event

Patron, SPG Jorhat chapter Shri Punit Suri welcomes the speaker shri Arun Kumar

President, SPG Jorhat chapter Shri Vishal Shastri delivering welcome address

Participants during technical presentation

Momento being presented to speaker by Patron, SPG

Shri Puneet Suri, ED-Basin Manager & Patron, SPG-Jorhat chapter and Shri Vijay Kumar Gokhale, CGM-Asset Manager gave concluding remarks and emphasised the need of induction of new technologies to arrest the declining production and finding new oil for sustenance of the exploration & production. The meeting concluded with vote of thanks by Shri H N Garg, Vice president, SPG-India, Jorhat chapter.

Society of Petroleum Geophysicists (SPG) & Association of Petroleum Geologists (APG), Vadodara Chapter organised a technical meet on 22nd November 2019. The programme started with two thought-provoking, interactive talks on contemporary issues.

The first one was delivered by Shri Jeetendra Tiku, General Manager (Geophysics) on the topic namely "Introduction to Policies governing Oil & Gas industry in India with special reference to Open Acreage Licensing Policies (OALP)". It was followed by another enlightening talk on the topic "Introduction of new technologies in Geophysical Services".

During his presentation, Mr. Jeetendra Tiku elucidated the various complexities pertaining to Important Acts & Rules Governing Hydrocarbon Exploration & Oilfield Development. He explained about Open Acreage Licensing Policy under Upstream Policy Regimes in India.

Shri Praveen Vohat presented an overview of Low frequency Passive Seismics. He also explained the acquisition gamut of LFPS including brief description about new LFPS Seismometer and also about the capability of new data acquisition system 508 XT.

All the SPG and APG members of WON Basin actively participated and benefited from the technical lectures. GGM - Basin Manager Shri H Madhavan in his address explained about the importance of such technical lectures and encouraged to conduct this type of program very often which will help enhancement of knowledge in earth science. The fraternities took this opportunity to bid farewell to Shri Matibar Singh, GGM-HGS, President, SPG, Vadodara Chapter.

The technical lecures were followed by colourful cultural programme and dinner.

In the evening, the members enjoyed a mesmerizing cultural programme, presented by an eminent dance troupe arranged from outside.

This was followed by an interactive sumptuous dinner. The technical programme was compared nicely by Ms Kanika, Programming Officer and Ms Nisha, Geophysicist (S). Vice President SPG Shri Rajesh Madan, Vice President APG Dr. A. K. Singh, Treasurer SPG Shri Rajesh Upadhyay and Secretary APG Shri Bhupendra Tauk were instrumental in making the event successful. The vote of thanks was proposed by Mr. Sanjay Kumar, Secretary, SPG, Vadodara Chapter.

The Earth Study 360 Imaging System 'An Insight into the Interpretation Realm' by Dr.Raanan Dafni, Emerson-Paradigm

Mumbai Chapter of Society of Petroleum Geophysicist (SPG) had organized a technical presentation on, The Earth Study 360 Imaging System “An Insight into the Interpretation Realm” by Dr. Raanan Dafni, Emerson-Paradigm on 7th Nov 2019, at NBP Green Heights, ONGC, BKC, Mumbai. In his interactive and well appreciated presentation, Dr. Raanan highlighted the (a) overview of ES360 Imaging System, (b) benefits of full-azimuth angle-domain imaging, (c) case studies from both Indian and global data and (d) pre-stack interpretative engine, i.e. supplementary information from directional image gathers.

The EarthStudy 360 Imager (ES360 Imager) is a versatile cluster-based depthmigration that simultaneously uses the full recorded wave field within acontrolled aperture to generate amplitude preserved, multi-dimensional, subsurface angle gathers which are 3D full azimuth, directional and reflection angle gathers. The Imager provides fast, target-oriented solutions for local analysis, and can also be used for imaging ona regional scale.It supports isotropic and anisotropic models, and all types of land and marine datasets, including narrow and wide azimuth streamer acquisitions and OBC data. Recently, ES360 migration included converted rays (P to S) also.

Unlike conventional ray-based imaging methods (e.g. Kirchhoff migration), EarthStudy 360 uses a point-diffractor operator to shoot rays from subsurface grid points up towards the surface, forming an accurate system for mapping the recorded surface seismic data into the subsurface Local Angle Domain (LAD) at each image point. This procedure ensures maximum illumination of the image points from all subsurface directions and surface source-receiver locations; all arrivals are taken into account and amplitudes and phases are preserved.

Earth Study 360 directional angle gathers enable specular and diffractionimaging, resulting in simultaneous emphasis on continuous structural surfacesand discontinuous objects such as faults or small-scale fractures, karst features. Structuralattributes at each subsurface image point (e.g. dip, azimuth and specularity)can be derived directly from the directional angle gathers.The ES360 directional angle gathers from Narrow azimuth surveys are suitable for diffraction imaging of discontinuities like faults and fractures as they are directly related to migration aperture and not sensitive to acquisition geometry unlike the reflection angle gathers. The diffraction imaging results are a better way of delineating the discontinuities than traditional ways like coherence cube.

Earth Study 360 reflection angle gathers display reflectivity as a function ofopening angle and opening azimuth and are most meaningful in the vicinity ofactual local reflecting surfaces, where the reflection angles are measured withrespect to the derived background specular direction. They are used forautomatic picking of full-azimuth, angle domain residual moveouts, which together with the derived background orientations of the subsurfacereflection horizons, provide a complete set of data for anisotropic velocity modeldetermination, azimuthally-dependent analysis of residual velocity (VVAZ) or amplitude versus angle/azimuth (AVAZ), using full azimuth angle domain seismic data, in order to determine fractureintensity (strength) and orientation (direction). These fractures derived from the seismic were verified with production data, FMI logs and available micro-seismics.


Regarding the future roadmap of ES360,Dr. Raanan demonstrated the applicability of Deep Learning (DL) to automatically obtaining different types of high resolution subsurface geometrical objects. The Deep Learning method is applied to spatial windows of overlapping full-azimuth directional image gathers. The application of Principle Component Analysis (PCA) on covariance matrices applied to these data windows significantly reduces the data, where only the principle (informative) directivity components are considered. The back propagation of these classified principle components to the image domain shows clear differentiation between structural reflectors, faults and point diffractors, even in areas heavily masked by ambient and coherent noise such as acquisition footprints. This approach shows great promise in identifying subsurface structural features with high accuracy which would be highly beneficial to the interpreters.

Mr. SK Sharma, (GGM-GP), HGS-Mumbai felicitated Dr. Raanan for his fantastic presentation. Mr. CPS Rana, (GGM-GP), Vice-President, SPG, Mumbai Chapter sum up the whole presentation, mentioning the international recognition of activities of SPIC, WOB on ES360 imaging system. Enthusiastic interpreters had made a valuable interaction with Dr. Raanan about the pre-stack interpretative engine of ES360.

SPG Mumbai organised a technical session titled “Imaging and Reservoir Technology Update”on 11th October 2019 at Auditorium, NBP Green Heights, Mumbai.The session is a part of continuous and relentless efforts by SPG to share ideas and experiences to the geo-scientific community and to express & exchange views & opinions on various exploration problems in Mumbai offshore areas. The session was chaired by SPG Mumbai Chapter President Shri K V Krishnan.

APG Mumbai Chapter Vice President Shri K. Vasudevan, SPG Mumbai Chapter Office bearers, Geoscientists from different G&G Companies and Students from Colleges were also present.

SPG Mumbai Chapter, President, Shri K V Krishnan emphasised the need of goodseismic imaging in exploration. He also made a point that with the advent of new technology and algorithm advancement, we should focus on robust processing sequence to bring out the difficult Mesozoic gas of Kutch Offshore.

SPG Mumbai Chapter,Secretary, Shri Anupam Sharma briefed on the 13th Biennial International Conference & Exposition scheduled to be held at Lulu Bolgatty International Convention Centre (LBICC), Kochi, Kerala, India from 23rd to 25th February 2020.

APG Mumbai Chapter Vice President Shri K. Vasudevan elaborated the exploration challenges in Western Offshore. He also said that successes in Mesozoic sandstone and Fractured /Weathered Dolerite (Intrusive) of Kutch Offshore need to be studied in detailed. The impact of processing,better imaging and reservoir technology advancement will certainly help in better understanding of these type of reservoirs.

Processing-Imaging Technology Update- By QING XU Joint 3D Source Deghost and Designature,OBN Deblending, Demultiple,IMA,ISS, FWI, Least Square Q Migration. Processing methodology was detailed with recent advancements and with case studies.

G&G Studies (Robertson UK)- By MARK COWGILL Integrated G&G Studies from Exploration to Development & Production, Unconventional Experience and Workflows and Geotraining. The presentation highlighted the approach to digitisation and digitalisation of existing data sets, play fairway mapping, improved seismic imaging and reservoir characterization.

Qing Xu is currently the VP Geoscience, Asia Pacific, Robert Porjesz , Regional Manager, Asia Pacific and Mark Cowgill, Business Development Manager for CGG Geoscience.

SPG Mumbai Chapter, Vice President Shri C P S Rana concluded the technical session with vote of thanks.He said that focus to imbibe recent advancements in processing and world analogue vis a vis Western Offshore Basin, India should be our focus area to work upon.

SPG Mumbai organised a technical session titled “Imaging and Reservoir Technology Update”on 11th October 2019 at Auditorium, NBP Green Heights, Mumbai.The session is a part of continuous and relentless efforts by SPG to share ideas and experiences to the geo-scientific community and to express & exchange views & opinions on various exploration problems in Mumbai offshore areas. The session was chaired by SPG Mumbai Chapter President Shri K V Krishnan.

Session started with welcome address and brief introduction about the objective of the program by President SPG India, Jorhat chapter Shri Vishal Shastri, GGM (GP). He said that such interactive sessions are noble initiatives and give an opportunity, especially to young executives, for Knowledge Sharing. He also detailed future programmes planned under the aegis of SPG-India, Jorhat Chapter that included more lectures and Geophysical & Geological field trips. Shri USD Pandey delivered his talk about ‘Emerging Geophysical Technologies for Hydrocarbon Prospecting’. The participative interaction by the house made the talk fruitful and interesting.

Prof.Satish Patel briefing the participants in the field.

Shri Vijay Kumar Gokhale, CGM (Production), Asset Manager gave concluding remarks and emphasised the need of induction of new technologies to arrest the declining production and finding of new oil for sustenance of the production. The meeting concluded with vote of thanks by Shri H N Garg, Vice president, SPG-India, Jorhat chapter.

SPG Ahmedabad Chapter organized a technical lecture on

“Basins, Their Structural Style and Play Fairways”

SPG-Ahmedabad Chapter organized a technical lecture on July 23rd 2019 on the topic “Basins, Their Structural Style and Play Fairways”. The lecture was delivered byProf.Jokhan Ram,former ED-Chief KDMIPE, ONGC and presently occupying the K.D Malviya Chair at Banaras HinduUniversity.

At the start, SPG Ahmedabad Chapter welcomed the distinguished speaker. The scholarly lecture dwelt at length the finer aspects of the subject on structure and tectonics, depositional systems, basin analysis and prospect evaluation.

The speaker covered all the aspects right from formation of different types of basins, various structural styles and its interpretation making use of the geological and geophysical data with example from Indian as well as Basins from across the globe. In the end play fairways were discussed with example form various fields. The event wasattended by large number of SPG members.It was a lively interactive session and was very well received by the audience.

SPG Ahmedabad chapter took pride in conducting such lecture series at regular intervals and looks forward for many more such knowledge sharing events in future.