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Andy Spriggs
Managing Director

Andy Spriggs

Andy is Rockflow’s Managing Director and acts as a project manager of multi-disciplinary teams performing a wide range of E&P technical, commercial and strategic projects providing advice to oil companies, investors and government agencies. Andy has a broad technical experience in asset evaluation and management and in petroleum economics. Andy has 27 years industry experience as a geologist with Shell and Arco, followed by various consulting roles in economics and business consulting. Recent assignments have included managing operated and non-operated asset portfolios for start-up companies; performing due diligence for asset and company valuations, specialist advisory services for contract negotiations, and Expert witness in commercial disputes. Andy is a member of the PESGB, SPE and AIPN and holds a PhD in geology from Leeds University, an MBA from Henley Business School and a BA in geology from Oxford.
Graham Cocksworth
Geologist

Graham Cocksworth

Graham Cocksworth is Rockflow’s Lead Geologist. Graham has particular expertise in reservoir evaluation and uncertainty analysis and has been responsible for a large number of asset evaluations and technical due diligence investigations of petroleum assets for potential sale or acquisition. Graham has twenty two years of global industry experience gained with Shell, EOG Resources and Gaffney Cline and Associates. He has a broad-based technical and commercial background with experience at all stages of field-life, from exploration to brownfield re-developments, including direct involvement in drilling operations. He has worked with oil and gas in clastic and carbonate reservoirs located onshore, offshore and in deep water basins around the world. Graham holds a PhD in Earth Sciences and MA in Natural Sciences from the University of Cambridge.
Jonathan Pye
Geophysicist

Jonathan Pye

Jonathan is Rockflow’s Principal Quantitative Geophysicist. Jonathan has over 15 years of international industry experience working within and for operating companies from survey design, exploration and development drilling to late-life re-development planning and cessation of production.

Jonathan has extensive experience in seismic processing & imaging, pre-stack interpretation, rock physics and reservoir characterisation projects. He has also been requested to lecture in operating companies training programmes.

Jonathan holds a BSc (Hons) in Geology from Imperial College and a PhD in Marine Geophysics from the University of Cambridge. He is a member of the PESGB and EAGE.

Kate Overy
Geophysical Advisor

Kate Overy

Kate specialises in seismic interpretation, depth conversion and volumetrics, and has recently joined Rockflow as an associate, following nine years in an oil and gas consultancy.

Kate is confident working in both IHS Kingdom and Petrel, assimilating geological and geophysical data to build an accurate interpretation of the subsurface. She has experience across a number of the world’s major hydrocarbon basins, including wide experience along the West African margin, North Falklands Basin and the UK North Sea. Previous projects have ranged from exploratory interpretation in areas of structural complexity, to appraisal studies of producing fields.

Kate has a MA in Natural Sciences (Geology) from the University of Cambridge.

Tom Gunningham
Reservoir Engineering Director

Tom Gunningham

Tom is a Chartered Petroleum Engineer and is Rockflow’s Technical Director. Tom’s key areas of expertise include reservoir evaluation and simulation, uncertainty quantification and evaluation, production engineering, well site operations, logging and testing, and reserves estimation. At Rockflow, Tom is responsible for internal sign off on reserves audits and is highly experienced in certification under a number of different international standards. Tom has twenty-six years of international petroleum engineering experience gained with BP and as a consultant. He has worked on oil, gas, tight gas, gas-condensate and heavy oil and fractured reservoir fields at all stages of the field lifecycle from Field Development Planning to Operator Asset Management including management of large National and Expat technical teams. Tom has experience in Europe, Asia, Middle East, Africa and FSU countries.

Tom holds B.A. (Hons), and MA (Oxon) Engineering Science from Oxford University. Tom is a member of the SPE and the Energy Institute. Tom is a native English speaker and speaks conversational German.

Simon Moy
Reservoir Engineer

Simon Moy

Simon is a chartered reservoir engineer with a wide-ranging background in classical oil and gas reservoir engineering including: production forecasting, reservoir simulation, material balance, well analysis and production logging. He has a thorough understanding of the dynamics governing reservoir performance and has worked on both operated and non-operated assets, liaising closely with operational teams, senior management and directors and a number of international reserves auditors. He has also acted as expert witness. Simon has twenty three years industry experience gained with BG, Centrica and independent Operators Burren and Bayfield. Simon was involved with the IPOs of both Burren and Bayfield Energy giving him a broad commercial understanding. He became Rockflow’s business development director in January 2015

Simon holds an MSc from Imperial College London, and BSc and PhD from The University of Kent. Simon is a member of the SPE and the Institute of Materials, Minerals and Mining.

David Puckett
EOR Specialist advisor

David Puckett

David acts as Rockflow’s specialist advisor on Enhanced Oil Recovery (EOR) techniques gained from 40 years’ experience with BP and UK Government working primarily on Enhanced Oil Recovery, Specialist Reservoir Engineering, Simulation and Special Core Analysis.

David is a world class EOR expert providing support studies to progress EOR appraisal assessments at the Concept Select stage and then to progress EOR via laboratory studies, simulation and pilot design and subsequent field wide EOR deployment as part of Field Development Planning and Asset Management.

Dave has a 1st class degree in Chemical Engineering from Exeter University and is a member of the SPE, SCA, EAGE and IEA

Miles Cudmore
Executive Advisor

Miles Cudmore

Miles is an Executive Advisor to Rockflow on Reservoir Management and Field Development Planning. Miles brings expertise in maximizing production and raising recovery through sweep and well management, recovery scheme selection and multi-disciplinary development planning.

Miles has over 30 years of experience and previously led the Reservoir Management function for BP. He has worked on oil and gas field developments in the UK, Latin America, Middle East and North Africa at all stages from appraisal to concept selection and project delivery through to production and mature field rejuvenation. In addition to working with E&P Operators, Miles has supported Private Equity covering technical and commercial evaluations, development planning and investment strategy.

Miles holds a Masters in Aeronautics and Astronautics from the University of Southampton and a MBA from the Open University. He is a prior Chairman of the London section of the SPE.

Alan Atkinson
Geoscience Director

Alan Atkinson

Alan is a Principal Geophysicist with Rockflow having over 30 years exploration, field development, and production geoscience experience, including nineteen years with operators in the North Sea (Amerada Hess & Phillips Petroleum), India (Cairn) and Africa (Canadian Natural Resources), and more than twelve years of worldwide consulting experience. Alan’s technical areas of expertise are reservoir characterisation, velocity modelling and the contribution of quantitative resource evaluation and geological risk to asset evaluations. He teaches a course on Depth Conversion which has been delivered over fifty times to audiences across the world, and is an honorary lecturer at Imperial College, London. Alan holds a BSc in Physics and an MSc in Geophysics, and is an active member of SEG, EAGE and PESGB.
Gavin Hancock
Petroleum Engineer

Gavin Hancock

Gavin is Rockflow’s project manager for Field Development Planning and asset operations. Gavin has expertise in concept screening – assessment – selection activities in combination with strong asset management and operations management skills. Gavin is experienced in all aspects of field development planning, reserves evaluation, reservoir monitoring, production optimisation, drilling, completion, testing and workover operations. Gavin has twenty eight years engineering experience; six years as a mechanical/plant engineer followed by twenty one years of international Petroleum Engineering experience with a major service company, major and minor operators and consultancy, in both a technical and senior management capacity. Gavin has managed large technical and operations groups and has onshore and offshore experience in the Middle East, USA, Europe, Russia & FSU, Africa and the UK.

Gavin Holds an HND in Mechanical Engineering, A BEng in Mineral Resource Engineering and an MSc in Petroleum Engineering from Imperial College London.

Colin Howard
Petroleum Economist

Colin Howard

Colin is a petroleum economist with 18 years’ experience specialising in the analysis and modelling of the upstream oil industry; with core strengths in fiscal model construction, probabilistic portfolio modelling, decision risk analysis, design and implementation of corporate planning, cash flow and financial reporting systems. He is a skilled instructor in petroleum economics having facilitated a number of in-house and public professional development courses.

Colin holds a BSc in Geology from the Royal School of Mines, Imperial College; an MS in Structural Geology from the University of Pennsylvania; and an MSc in Mineral Project Appraisal, Royal Schools of Mines, Imperial College. He is a member of the Society of Petroleum Engineers (SPE).

Mike Naylor
Executive Advisor

Mike Naylor

Mike acts as an advisor to Rockflow’s Management and Strategy Practice. He provides expertise in the areas of business strategy, portfolio management and the development of organisational processes and technical and leadership capability. Prior to working in consultancy, during his thirty-four year career, Mike worked in various worldwide roles for Shell including research scientist, exploration geophysicist and exploration manager for a number of large operating companies before becoming Shells VP for global exploration.

Mike holds MA in Natural Sciences and a PhD in Geology from Cambridge and is a fellow of the Geological Society of London. He is also a member of the Institute of Directors (MIoD)

Roddy Irwin
Petrophysicist

Roddy Irwin

Roddy is Rockflow’s Principal Petrophysicist with over 26 years’ international industry experience, including over 10 years with Shell
International E&P and more recently, 6 years as Senior Advisor with
Gaffney, Cline & Associates. Roddy has extensive experience in operations, integrated petrophysical studies, reservoir modelling and also field development planning. He has performed the role as external petrophysical advisor and peer reviewer for several independent energy companies over the last few years.

He has extensive experience in the estimation of Petroleum Reserves and Resources through his project management of many Reserves estimation and audit studies. Roddy has considerable experience in Unitisation and Equity Redetermination having been deeply involved in the preparation of submittal cases for several clients as well as experience in the Expert role. He is an experienced Expert Witness in commercial litigation.

Roddy holds a BSc (Hons) in Petroleum Geology from the University of Aberdeen and is an active member of the EAGE and the London Petrophysical Society.

Graham Cooke
Geoscientist

Graham Cooke

Graham is a Principal Geoscientist at Rockflow. Graham has over 20 year’s industry experience across the E&P spectrum gained at Shell International and consulting.

Graham’s key areas of expertise include seismic interpretation, geological / basin / prospect and field evaluation, building and maturing a portfolio of opportunities from exploration through to field infill targets, volumetric determination and sub-surface risk assessment.

He has a broad-based technical and commercial background with geoscience and subsurface lead experience across exploration, appraisal and development, in the UKCS, Europe, Asia, Middle East, Africa, FSU and Australia.

Graham holds a B.Sc. (Hons) University of London, and an MSc Petroleum Geoscience from Imperial College (University of London).

Alex Chichinadze
Well Engineering Advisor

Alex Chichinadze

Alex is Rockflow’s lead drilling advisor and Drilling Manager. Alex directly assists Rockflow clients in the design, planning and execution of multi-well drilling campaigns. During his career, Alex has managed numerous multi-rig drilling campaigns of vertical, deviated and horizontal wells in clastic and fractured reservoirs. Alex is also highly experienced in workover operations, well testing and CT operation (including CT drilling). Alex has worked as a driller, drilling engineer, Operations/Drilling Manager, Technical Director and General Director in both state and western operating companies. Alex has specialist skills and knowledge in the planning and execution of deep, complex HP/HT wells in thrust belt environments, through the drilling and testing phases. Alex has over forty years of experience, primarily gained in FSU countries.

Alex has a BEng in Petroleum Engineering and a PhD in Mining and Geotechnical Engineering. Alex is a native Georgian speaker, he also speaks fluent Russian and English and conversational French and Spanish.

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