Geomodeler, Sr petrophysicist, team leader

CURRICULUM VITAE

PERSONAL INFORMATION

Full name: Jean Carlos Rangel Gavidia.

Date of birth: April 2nd, 1979.

Place of birth: Mérida, Venezuela

Age: 44 years

Nationality: Venezuelan

Civil state: Divorced

Profession: Geological Engineer – MSc Petroleum Production Engineering- Ph.D. Geosciences (ongoing)

Specialty: Petrophysical Performance, Static Characterization, Geomodeler, Team Leader

Addresss: Rua Luiz Vicentim, Santa Genebra II, Barão Geraldo # 302, Campinas São Paulo

Phone: +55-199********

email: ****.******@*****.***, ***********@*******.***

EDUCATION:

PhD. Geosciencs at Universidade Estadual de Campinas UNICAMP, Sao Paulo – Brazil (2020-2023) (ongoing).

Project: Geologic Characterization of a pre-salt Carbonate reservoir focused on geomodelling using Multi Point Statistics. The first part of the project consisted of developing the advanced petrophysical model, including multi-mineral analysis, reservoir properties estimation, rock typing, SHM, and identification of mineralogy/facies relationships with reservoir properties as, the extrapolation of facies using Artificial intelligence. The second part of the project is focused on determining the parameters responsible for excess permeability (including Vugs and Fractures) and finally, the 3D geological model representing depositional facies and properties and including diagenetic facies distribution and effects of fractures. Each one of these three steps will produce a paper.

Ph.D. Visiting Scholar at the University of Kansas, under the supervision of Ph.D., Haas Distinguished Professor Robert H. Goldstein, working on geomodelling and reservoir characterization for a Brazilian pre-salt carbonate. October 2022 - December 2022.

MSc. Petroleum Engineering at the Robert Gordon University, Aberdeen – Scotland. (2008).

Thesis: Static Characterization in “O BOR-2”, a Naturally Fractured Carbonate Reservoir in Venezuela.

Description: It is a very complex reservoir that is compounded by dolomites, calcite, shale, and siltstone. It has a triple porosity system (vugs, matrix, and fractures) where the main production comes from vuggy dolomites. It aimed to build a new model with honors the main petrophysical and geological properties, integrating conventional well logs, image well logs, seismic attributes interpretations, and production history. The final product was the first approach of this reservoir which helped to identify new drainage points.

BSc. Geological Engineering at Universidad de Los Andes Mérida - Venezuela.

Thesis: Petrophysical characterization in a Carbonate Reservoir using Neural Networks for Petro-Facies estimations, in Barinas Basin - Venezuela. (Maximum Qualification and Special Mention).

CAREER SUMMARY

Professionally trained with more than 17 years of experience in oil and gas. I started my career in 2002 with PDVSA Barinas soon after finishing my Bachelor's in Geological Engineering. During my career with PDVSA, I worked on a variety of G&G projects based on different kinds of reservoirs, in light, medium, and heavy oil, in clastic, carbonate, and shale gas reservoirs.

After 5 years in PDVSA I got a scholarship from the company to take an MSc in Petroleum Engineering at the Robert Gordon University in Aberdeen UK, after I came back to Venezuela I started working as Petrophysicist and partially as a Geomodeler, working with projects in Venezuela Barinas Basin and Bloque 8 from the Orinoco Belt, where I was the local technical head and mentored junior hires in petrophysics. After 2015, I occupied the static reservoir characterization team leader position until 2020. In February 2020 I moved to Brazil to start my Ph.D. in Geosciences, currently, it is ongoing, and from October – December 2022, I was a Ph.D. student Interchange in the Department of Geology at the University of Kansas, Under the supervision of Ph.D. Robert H. Goldstein Haas Distinguished Professor.

SPECIAL EXPERIENCE

Petrophysical Characterization:

Shaly-Sand: Clastic reservoirs of Barinas Basin and Orinoco Belt, Venezuela, consolidated and unconsolidated.

Carbonates: Extensive experience in Carbonate Petrophysics including multimineral characterization and (Vuggy and fracture). Fm Escandalosa O Barinas basin and Brasiliam pre-salt carbonates.

Shale Gas/Shale Oil: It was carried out as the first project to identify a possible shale gas play in Barinas – Basin Venezuela. The Results were presented on the Rio Oil&Gas 2015 in Brazil.

Heavy Oil: heavy oil sand from the Bloque 8 in The Orinoco Belt.

Open Hole and case hole general petrophysical performance.

Multiwell reservoir petrophysicist.

Geomodelling: Experience integrating a variety of information coming from different sources such as seismic interpretations (horizons, faults, and structural framework, seismic Attributes), petrophysical properties (porosity, permeability, RQI, Sw, FZI, Rock Type), Reservoir data, sedimentological and geological information, among others, to build different models in clastic and carbonate reservoir, estimation of OOIP, identification of new drainage proposal points. Build iso-properties map including porosity, permeability, water saturation, probability maps, facies, and workflows to manage uncertainty in OOIP estimation.

Junior Staff Development: Experience in training and mentoring junior hires. Developed different training programs for new hires.

University Teacher: Teacher in basic well-log interpretation at the UNELLEZ and UNEFA Universities in Barinas City, Venezuela. Teacher online for the Petrophysics MSc Program at the Gabriel Rene Moreno University in Bolivia

KEY SKILLS

•Team leader in Static Reservoir Characterization.

•Experience in Geomodelling, in clastic and carbonate reservoirs.

•Experience in formation evaluation in clastic and carbonate reservoirs, open hole & cased hole Petrophysicist, and single and multi-well interpretation using the probabilistic and sequential approaches.

•Experience in logging and coring program design.

•Petrophysical support to the sub-surface team to build the 3D static model.

•Skills in routine and special core analysis (SCAL) and core-log integration.

•Experience in providing petrophysical support for workover wells.

•Techlog programming in Python.

•Python programming.

•Proficiency in integrated formation evaluation, integrating conventional logs, NMR & ECS data, mud-cutting logs, and core data.

•Work together with the exploration team in formation evaluation appraisal and developments wells.

•Work in formation evaluation using basic Wireline and MWD/LWD logs.

•Skills in borehole imaging interpretation.

•Working experience with a multidisciplinary reservoir evaluation team in FDP.

•Very strong organizational and management skills, motivated, positive attitude, and ability to work under pressure.

•Experience looking for new opportunities in mature fields.

•Experience in building and updating 3D Models using Petrel.

Experience working with neural networks, and AI to estimate rock facies and well-log answers.

SOFTWARE CAPABILITIES

•Geolog.

•Techlog platform Advanced.

•Petrel.

•Paleoscan

•Python.

GeoFrame (Petroview, geology office, Well Composite, litho tool kit).

•Interactive Petrophysics-IP.

•Sigemap (mapping Software).

•Power BI.

•Python.

EMPLOYMENT HISTORY IN DETAIL

MAR 2020 – TODAY Ph.D. CANDIDATE IN GEOSCIENCS AT UNIVERSIDADE ESTADUAL DE CAMPINAS, SAO PAULO BRAZIL (UNICAMP)

• Project focused on generating a 3D Geological model honoring depositional and diagenetic facies, as well as reservoir properties and Fracture distribution.

MAY 2015 – FEV 2020 STATIC CHARACTERIZATION TEAM LEADER (PDVSA)

• The main activities are related to supervising and guiding all the processes involved during the static characterization model building.

• Team leader of a group of 15 persons.

• Support to the Petrophysicist and Geological team for the exploration and Development.

JUL 2008 – MAR 2015 SENIOR PETROPHYSICIST / GEOMODELER (PDVSA)

• The main activities are related to petrophysicist; however, I worked on the development of 3D models giving the necessary support to the rest of the reservoir characterization team.

• The petrophysical activities providing in-house petrophysical support for different assets in Barinas Basin in clastic and carbonate reservoirs medium and light oil, additionally to provide the petrophysical support for Boyacá bloque 8, a heavy Oil field part of the Orinoco Belt. The typical workflow includes building the petrophysical model to compute porosity/water saturation & calibrating Por/SW with core data. Building permeability model and defining electro-facies by incorporating the core and borehole image data. All this data will be used for building the static model.

• Providing petrophysical support during field operations which include QC logs and selecting zones for pressure testing.

• Quick Look analysis to higher management for every newly drilled well.

• Present the petrophysical results to management for every new well. Highlight the key uncertainties and recommend the logging and coring program for the upcoming wells to address their uncertainties.

• Planning, discuss and supervising well logs acquisition.

• Pre-drilling vendor evaluation and providing feedback to management on each logging company with logging capabilities and highlighting the key technology for reservoir evaluation. Recommend the new technology which can help to understand challenging plays better. Keep an eye on competitors’ activity in terms of any new technology used for the same resource plays which can help the management with the key decisions for the resource development plan.

• Planning, discuss and supervising core acquisition, participating in RCA and SCAL plugs selection together with the reservoir and geologist team.

As a geomodeler I have built 3D models in different clastic reservoirs including Borburata, Sinco, Bejucal, Maporal, and Torunos fields in Eocene and Cretaceous Clastic Formations, additionally, a 3D prototype Double porosity model was built for a cretaceous Carbonate reservoir. It was presented as the dissertation of my MSc in Petroleum Engineering. The main activities were related to building the structural framework integrating seismic horizons interpretation as seismic properties and integrating petrophysical and geological data coming from the integrated asset team.

Main completed Projects:

1)Geomodelling a triple porosity system reservoir integrating petrophysical characterization, modelling fracture, vuggy and matrix porosity and permeability separately.

2)Petrophysical Characterization in a carbonate using double and triple porosity models system to determine cementation exponent “m”, a total of 64 wells were studied using different methodologies depending on the well-log information of each one, “m” was studied using a system of triple porosity, where image well log were available, in other cases “m” was estimated by the used of relationships which depend on sonic, total porosity and resistivity relationship, all of the methodologies were core calibrated, and compared with core Water saturation, the final results took into account a new approach with a better understanding of Sw. The entire project was carried out in techlog.

3)Petrophysical characterization in a Shale gas exploration project, shale gas in Barinas state first steps. Presented at Rio Oil and Gas 2015 in Brazil.

4)Static Characterization of O BOR 2 a NFR Carbonate: a first approach of a double porosity and permeability was built honoring the information coming from petrophysicist, seismic attributes, production, and sedimentology. The first approach is being currently used as support for new drainage points.

5)Esc P, SSW-64X 3D model a successful exploratory well that discovered a new reservoir. Using seismic horizon interpretation, petrophysical properties, and reservoir information the 3D model was built and use to estimate its OOIP and propose 3 new drainage points.

6)3D Model of AB Gob in Borburata field, a clastic reservoir compartmentalized vertical (by calcarenites) and laterally by faults. It was considered at the beginning only one reservoir but pressure tests, detailed sedimentological and petrophysical characterization, as well as production indicates different blocks. A new model was built honouring the new interpretation and it allows us to identify a group of workovers, as well as 3 new production wells.

7)Different similar models to the described previously have been built and updated, mainly in clastic reservoirs.

8)SSW-66X Petrel Static Model, an initial approach to quantify OOIP, and to predict Production Profile, this model was built considering Seismic horizon interpretation plus well data interpretation (porosity, permeability, and Water saturation)

9)Reserves characterization of TOR-4 Field, it is a field discovered in 1995 with 4 reservoirs 3 clastic and 1 carbonate. Their reserves were estimated once the discovered well was drilled. 2 out of 4 reservoirs were updated with new well data acquired after 2005. In July 2014, a Workover was carried out in one of the reservoirs surpassing expectations, so a complete static reservoir characterization was developed in the four reservoirs including petrophysical characterization, property mapping, isopach, and structural interpretations. The results were very satisfactory, showing 6 workovers and 2 new drainage points.

10)In October 2014 an internal workshop was carried out to study a small field compounded by 8 wells, all of which were studied in detail around three different reservoirs. Four new opportunities were discovered for workovers, and two possible new drainage points, to be supported by a simulation model.

Additionally, a technical project was carried out to validate which software shows more advantages for the company, the team validated techlog and Elan (Geoframe), and the final decision was to acquire techlog due to its simplicity to solve the same problems as elan do, and beyond it gives us more advantages. All projects in Geoframe Elan have been migrated to Techlog.

I have overseen numerous bachelor dissertations projects including MSc investigation projects.

Jun 2006– Jun 2008 PDVSA SCHOLARSHIP IN ABERDEEN TO TAKE A MSc. Petroleum Production Engineering.

I was chosen as a candidate to take the MSc in Aberdeen – Scotland at The Robert Gordon University. The plan consisted of language proficiency, one year, and finally, the MSc, which was a special program required by PDVSA. The project dissertation was based on a 3D model in Petrel of a Carbonate reservoir. The challenge was to represent the first 3D model for that reservoir which represents properties from matrix, vugs, and fractures.

Jan 2004 – June 2006 PETROPHYSICIST,

I have worked as a part of the integrated reservoir studies team, carrying out petrophysical evaluation on wells, from numerous onshore fields in Barinas Basin-Venezuela, including field producing since the 1940s, covering multiple in clastic and carbonate reservoirs. The workflow followed comprised of:

Petrophysicist training in the company.

Responsible for the day-to-day open hole and case hole petrophysical services.

Quality control of the raw logs, making sure that the output data complies with the company procedures, and the data has been prepared as the procedure agreed with the client.

Selection of key wells based on the availability of logs, quality of core data, interval coverage, and the geographic location of the well.

Log validation core data and logs from the offset wells if available.

Computation of shale volume, porosity, saturation, lithology, permeability, and pay using Elan.

Generate petrophysical support for new drilling proposals.

Responsible for all in-house petrophysical databases, making sure that the database for each asset is up-to-date and running.

Perform the formation evaluation and provide all the required petrophysical data to Geomodeller to build and up to date the static model.

Below is the list of the main completed projects:

1) Formation evaluation for Gobernador Formation a clastic reservoir, in different reservoirs Sinco, Borburata, Bejucal, Maporal, Torunos, and Caipe.

2) Petrophysical characterization for Esc “O” reservoir. The petrophysical support was generated to support the field development in a complex carbonate reservoir. Carried out in Borburata field, and Silvan field.

3) Petrophysical characterization in Esc “P” Formation. It was developed as a support for field development in different fields such as Borburata, Bejucal, Torunos, Sinco, and Caipe.

Ago 2003 – Dec 2003 DEVELOPMENT GEOLOGIST,

A mapping project for reserves evaluation consisted of taking the reservoir properties from the petrophysicist characterization and generating property maps such as porosity, permeability, water saturation, structural and isochore maps, under the company requirements. A total of 16 maps were created for two different reservoirs. This project was done for PDVSA.

Other Software:

•Linux, UNIX, Solaris.

•DOS, MS- Windows.

•MS-Word, MS-Excel, MS-Power Point, FTP.

•Python.

•Power BI.

•RMS

Membership:

AAPG Member # 10205004

SPE Member # 3238127.

Member of Venezuelan Engineers College, C.I.V: 146.228.

Technical works / International events:

Ensemble-based machine learning application for lithofacies classification in a pre-salt carbonate reservoir, Santos Basin, Brazil. November 2022, Petroleum Science and Technology. DOI: 10.1080/10916466.2022.2143813

•Shale Gas in Barinas first steps. Rangel Jean, Blanco Anabell, and Carmona Angel, poster prepared to be presented at the Rio Oil & Gas Expo and Conference 2014 held between September 15 to 18, 2014 in Rio de Janeiro. Presented by Jean Rangel

•Estimación Del Exponente de Cementación “m” en Yacimientos Carbonaticos utilizando Sistemas de Triple Porosidad. Disminución de incertidumbre en la determinación de la saturación de agua. Paper presented as an oral presentation at the II SPE WVS held in Porlamar Venezuela from 22 to 25 October 2013.

•Different Courses focus on Petrophysical and Geomodeling Characterization from the Basic to the Advanced level.

•Course: Carbonate and Fracture Petrophysics a Roadmap, 23 – 27 October 2011, Held in Dubai. Instructor Mark Deakin Ph.D. (Petrophysics) Hot Engineering.

•Forum: Static Characterization In "O BOR-2" a Naturally Fractured Carbonate Reservoir in Venezuela. Presented on: Naturally Fractured Carbonates Reservoirs: Characterization, Modelling, simulation, and Development SPE Forum. 12-16 October 2009, held in Sharm el Shaikh, Egypt. Poster presentation.

•Mapping porosity distribution in a vuggy carbonate reservoir integrating seismic attributes with borehole image logs through a supervised facies analysis: Pedro Álvarez, Jean Rangel, Maybé Martinez., presented by Pedro Alvarez at SEG International Exposition and 79th Annual Meeting. Houston, Texas, USA, 2009. (Oral Presentation).

•• Congress: “New Methodology for an Integrated Reservoir Characterization in a Natural Fractured Carbonate Reservoir). 8-11 November 2005, V INGEPET 2005, Held in Lima – Perú, Oral presentation.

•Congress: “Petrophysical Characterization in Carbonates Rocks using neural networks”. X Congreso Geológico Colombiano, Held in Bogotá – Colombia, 24th July to 01 August 2005. Poster.

•Internal Course related to Petrophysicist and Geomodelling, using Elan, Techlog, Geolog, and Petrel from Schlumberger.

Personal References:

1)Dr. Robert Goldstein, Haas Distinguished Professor Department of Geology at University of Kansas, +1-785-***-**** ****@**.***

2)Dr. Alexandre Vidal, professor departamento f Geology at Universidade Estadual de Campinas UNICAMP, +55-199******** *****@*******.**

3)Franklin Angel, Sr Petrophysicist at Ecopetrol +57-318*******, ********@*******.***

4)Leonardo Delboni, Mechanical Engineering Unicamp, +55-11-994******

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