Leonardo Díaz Email & Phone Number

Al Khobar, Eastern, Saudi Arabia

- Current Competencies: Onshore, High-Volume Market, Mature Fields, External Client, Integrated Projects, Multiple Product Line Scope, HPHT gas wells drilling and completion.- Discuss and agree on well design with Client.- Prepare and approve drilling and completion programs.- Time estimation and planning.- Follow up on drilling operation during execution phase.- D&C Programs standardization.- Analyze data for continuous performance monitoring and drilling process optimization and improvement.- Support with remedial jobs in case of SQ events.- Collaborate with cross-functional teams- Prepare PO's and contact 3rd parties for services.- Completion report closure with client and well delivery.- Incidents investigations.

Neuquén Province, Argentina

- In charge for the development strategy for core unconventional assets integrating drilling, completion and production designs in a factory model perspective.- Established development strategy for Core Vaca Muerta (fully unconventional) assets integrating drilling, completion and production designs.- As Portfolio Optimization champion: prioritize well inventory for area strategy execution and business planning, economic evaluation for unconstrained inventory assessment, and run economic scenarios for well inventory and development strategies.- Managed operational scheduling for Field Development, achieving significant cost savings and operational efficiencies.- Oversaw budgeting for Capex and Opex for main development projects KPIs (Capex, Production, Opex), resulting in improved financial performance and resource allocation.- Accountable for all unconventional project Capex, representing 90% of company Capex (i.e. ~900 MM$ in 2023).- Conducted New Ventures Analysis, identifying and capitalizing on new opportunities for growth.- Interacted with stakeholders across upstream and midstream operations, fostering strong relationships and collaboration.- Strong interaction with Subsurface group to challenge the best alternative for well construction and stimulation purposes.- Supervise and promote lean sigma performance optimization projects, as Drilling and Completion Capex champion.- Combined technical expertise with managerial skills to drive successful business development planning and evaluation, leveraged by previous Field and Well Engineering experiences.

Neuquén Province, Argentina

- Senior Well Engineer for Conventional and Unconventional Projects in Argentina.- Played a key role in Well Construction Standardization and Performance Improvement Programs, focused on the execution of factory mode type for unconventional wells.- Authored technical specification documents and standardized drilling workflows.- Identified and implemented operational and cost-saving opportunities.- Provide analysis for operations optimization: multiple well pads configuration, offline cementing, wellhead operations, directional drilling tool reliability, optimum horizontal lateral length, and analysis of new technologies deployment to heavily reduce cost in order to approach a factory development well type. - Successfully introduced Project Management Office (PMO) culture.- Broadened exposure to upstream operations for comprehensive industry understanding.- Got Lean Six Sigma Green Belt certification.

Argentina

- Served as Senior Well Engineer on Vista Oil and Gas Unconventional Project, leading Project Initiation, Planning, and Execution.- Successfully organized drilling operations for Vista’s Unconventional Project in Vaca Muerta Field, utilizing Underbalanced technologies.- Drilled horizontal wells with 2,500 to 3,000 m lateral sections in Bajada del Palo field, Neuquen Basin.- Responsible for preparing Well Proposals, Basis of Designs, Well Drilling Programs, AFE's, and End of Well Reports.- Acted as a key communication channel between Client and Schlumberger Product Lines for this Integrated Project.

Australia

- Well Engineer and Wellsite Leader for Schlumberger Integrated Drilling Services, Tri-Star Project: • Led full process of Tri-Star Integrated Project, from Initiation and Planning to Execution and Close Out. • Drilled and cavitated two wells on a fully-integrated IPM project for Tristar Petroleum in Central Queensland. • Developed all project documentation, including Basis of Design, Bridging Document, and Drilling Program. • Organized and led DWOP and pre-spud meetings, ensuring thorough preparation and coordination. • Managed operation follow-up, liaising with client engineers, coordinating product lines, logistics, and third-party operations. • Supervised field operations as Wellsite Leader, ensuring smooth execution and adherence to specifications. • Developed all close-out documentation, including End of Well Reports and organizing After Action Reviews meetings with the Client.- Business Development Support: • Provided technical support to the Business Development team in Australia for market opportunities evaluation. • Prepared tender response documents and AFEs for well proposals for various Clients, contributing to successful bids.

Argentina

- Business Development Support: • Provided technical support for the Business Development team in Argentina, assisting IDS Business Development Manager and Operation Manager. • Evaluated opportunities for the Argentina Geomarket, performing time analysis, risk evaluation, and operations procedures for proposals. • Participated in data rooms and supported SPM in project evaluations for the unconventional argentinian market.- Pampa Energia Project – Technical Leader (Well Construction): • Led the development of a comprehensive Drilling and Well Engineering Program for a horizontal gas well in Sierra Chata Field for Pampa Energia. • Designed the well for a highly CO2 corrosion and sour environment, meticulously considering all aspects of the operation. • Presented the Program to Pampa Energia Managers, integrating efforts of Schlumberger Drilling Group Product Lines.

United Arab Emirates

- Assigned to SLB HQ Project for Drilling Real-Time Operations Standardization with worldwide impact.- Conducted Short Term Assignment at Abu Dhabi Drilling Technology Integration Center for on-the-job training.- Tested implementation of developed workflows and analyzed their adaptation in actual real-time operations.

Argentina

- Well Engineer at Unconventional Project in Aguada Federal field, Neuquén Basin.- Utilized Underbalanced technologies to drill horizontal wells with 1000 m lateral sections.- Successfully introduced Water-Based Mud (WBM) system instead of Oil-Based Mud (OBM).- Responsible for well engineering and operations support for one rig.- Prepared Well Proposals, Basis of Designs, Well Drilling Programs, AFE's, and End of Well Reports.- Attended critical operations at the wellsite, including Underbalanced Cementing and Pre-spud meetings.- Prepared casing and tubing designs using TDAS software.- Developed well operations procedures, such as Casing running and cementing.- Initiated engineering corrective actions to ensure continuous improvement and drilling optimization.- Started to develop basis of design and well engineering for Bandurria Norte Block wells.

Saudi Arabia

- Served as Night Wellsite Leader for Ghawar Gas LSTK project during personnel shortages.- Oversaw drilling operations for vertical gas wells with depths ranging from ~12,000 to 15,000 ft.- Managed operations on a 2,000 HP Rig capable of drilling down to 19,000 ft, contracted through Arabian Drilling Company.- Provided support as a Field Engineer, assisting engineering staff both at the office and wellsite.

Argentina

- Well Engineer at Unconventional Project in Vaca Muerta Shale Reservoir.- Implemented Underbalanced and Drilling While Casing technologies for production section drilling of S-type wells.- Managed well engineering and operations support for one or more rigs.- Prepared Well Proposals, Basis of Designs, Well Drilling Programs, AFE's, and End of Well Reports.- Participated in critical operations at the wellsite, particularly Underbalanced Cementing and Pre-spud meetings.- Conducted casing and tubing design using TDAS software.- Developed well operations procedures such as Casing running and cementing.- Assisted in selection and evaluation of service companies, suppliers, and equipment.- Initiated engineering corrective actions to ensure continuous improvement and drilling optimization.- Supported Project Manager with Field Tickets and led the Project Billing Process.- Provided technical and logistic support for Well Site Supervisor, spending over 100 days at the wellsite as a Field Engineer.

Venezuela

- Completed a 6-month Training Development Program at Semi-Submersible AJS-101 Rig in Maracaibo Lake.- Gained hands-on experience in various Drilling Operations roles: Roustabout, Floorman, Derrickman, Assistant Driller, and Company Man Assistant.- Assisted supervisors and managers to understand operational restrictions and limitations, enhancing performance understanding.- Worked with Chief Electrician and Mechanic to grasp rig maintenance and repair challenges.- Received introductory courses in Oilfield Business and Well Engineering.- Led the Anti-Rust team, demonstrating management skills and achieving tangible results in Rig’s Maintenance Program.- Supported Rig Manager in preparing and improving asset inventory of rig equipment.- Field exposure: 120 days.

Carem25 Nuclear Reactor Project

- Member of Technical Office Department for CAREM Nuclear Reactor Project.- Handled disciplinary issues arising from interaction between different Technical Areas.- Facilitated efficient interaction between project areas, ensuring effective collaboration

Mechanical Engineer, Mechanical Engineering

Student, Mechanical Engineering

Electromechanical Technician