Derek Lebsack, P.E. Email & Phone Number

Houston, Tx, Us

London, England, Gb

College Station, Tx, Us

College Station, Tx, Us

College Station, Tx, Us

Sole drilling & completions engineer at a family-owned operator. Specific focus on shallow bay drilling in South Louisiana with barge drilling rigs. Sidetracking wells with parent wellbores up to 60+ years old, drilling around a legacy salt dome oil field, with bed dips upwards of 70° inclination.Mix of old-school and new technology, utilizing RSS, DOBM, and advanced logging technologies to drill conventional high permeability sands around/under a salt dome.

Working Interest (WI) and Overriding Royalty Interest (ORRI) owner, investor.

London, England, Gb

Supply chain support engineer embedded with Deepwater Wells Engineers, supporting ongoing and upcoming rig activity in Deepwater Gulf of Mexico.► First Drilling Engineer on team as part of pilot program. Following rapid success, team makeup quickly restructured to consist almost entirely of members from Drilling Engineering discipline.► Worked with a small team to handle tangibles purchases for all deepwater activity in the GOM and abroad, including wellheads, OCTG, liner hangers, and cementing accessories► Individually supported flagship Shell projects such as: Appomattox, Olympus, GOM Exploration, Mexico, Trinidad, and Frontier Exploration (including Namibia)► Actively involved in front-end well design (FEED) work to ensure feasibility of progressed casing programs► Managed capital commitments versus equipment lead times to ensure deliverability of equipment against rig sequence while minimizing early capital outlay ("just in time" delivery) - driving large increases in capital efficiency► Guided Wells Engineers to maximize usage of standardized tangibles to increase scheduling flexibility and utilization of the most broadly applicable equipment, increasing rig sequence optionality► Evaluated on-the-ground inventory versus business needs, utilizing inventory when appropriate and determining if legacy equipment can be sent to Investment Recovery► Reacted rapidly to operational demands, deploying planned and unplanned contingency equipment to prevent rig downtime► Signaled demand to suppliers to anticipate business needs and plan accordingly► Drove development of vendor advancements, including rationalization of subsea wellhead systems, approval of new casing connections/sizes/weights/grades, and consolidation of similar casing size/weight/grade standards► Coordinated specialized OCTG needs between Wells Engineers, internal SME's, and suppliers to deliver suitable metallurgy for Sour Service and HPHT Deepwater wells

Houston, Texas, Us

► Drilling Engineer for Offshore - Gulf of Mexico (GOM)► Executed the 1st post-Macondo barge drilling project in Federal (OCS) waters beyond the 3 nautical mile boundary► Recently designed & completed a 22,000' MD extended reach / extreme reach well in 1,200' water depth at 65° inclination utilizing mudline suspension, Managed Pressure Drilling (MPD), first run of a new low-ECD synthetic (SBM) mud system in the GOM, and the first GOM use of a new drillpipe connection on a 90-day planning timeline► Planned & executed multiple platform rig lines from cradle to grave, including a multi-well platform rig performance drilling program in ±1,200' water depth utilizing Managed Pressure Drilling (MPD) with statically-underbalanced mud weights, SOBM, and high angle wells► Organized and led industry cooperative effort to find solution to recently-implemented shearing requirements for offshore surface BOPs while running completions with control lines, where similar efforts had failed. Successfully designed and tested solution with readily available off-the-shelf components allowing permitting of wells with single/dual tubing strings and up to 4 control lines.► Sole drilling engineer in charge of planning and execution of multiple platform rig mobilizations to platforms in water depths ranging from 250-1,200' of water, including site visits, rig layouts, maximum load case design, equipment selection, and rig refurbishment.► Significant field time as a night drilling supervisor on an offshore platform rig► Assists Decommissioning group with PA/TA well decommissioning► Provides Professional Engineering certification of BSEE abandonment permits, including after-hours discussion with BSEE officials for forward-plan approvals► Exposure to: platform rigs, jackup rigs, barge rigs, liftboat operations, Continental Shelf (surface stack) drilling, Managed Pressure Drilling (MPD), slot recoveries, platform rig layout planning and mobilization

Houston, Texas, Us

► Drilling Engineer for onshore Permian assets► Developed modified casing design for Spraberry horizontal wells, saving approximately $300M per well in tangible capital expenditures► Supervised non-op partner activity► Lead drilling engineer managing regulatory interaction with Texas Railroad Commission (TxRRC) and University Lands (UL) government bodies► Managed winddown / handoff of assets and provided support during divestment of Permian assets

Houston, Texas, Us

► Senior Drilling Engineer in charge of 1-4 horizontal rig lines in the Granite Wash unconventional oil play in Texas Panhandle and Cotton Valley conventional high-liquids gas play in East Texas. ► Focused on capital-saving measures, including pad drilling and process efficiency improvement through engineering redesign and implementation of novel/alternative technologies► Optimized drilling parameters and BHA/tubular design to improve rates of penetration, extend BHA life, minimize vibrations (stick-slip) and reduce catastrophic failures in a highly-abrasive formation► Implemented monitoring of Mechanical Specific Energy (MSE) as a real-time drilling efficiency indicator► Engineered an LCM recovery system using existing rig and rental equipment with minimal fabrication costs and no additional rental costs. Performed cuttings particle size distribution testing and compared results against distribution of LCM material to select optimal shaker screen mesh size. Retained 75% of LCM while removing 75% of drilled solids in the mud system, decreasing disposal, diesel, and LCM costs while drastically improving mud properties. Previously required bypassing shakers and allowing suboptimal mud properties.► Assisted in the development and testing of PDC bits with advanced rolling cutter technology with Smith (co-authored AADE paper AADE 15 NTCE 39 detailing this process)► Applied a specialized nitrogen foam cement design to enable successful cementing of production long strings. Achieved sufficient zonal isolation while keeping ECD below the fracture gradient. Resulted in savings of $250,000 per well by eliminating the need for a liner/tieback production casing design.► Designed a 12 1/4" vertical BHA that achieved a 300% increase in ROP and 300% increase in bit life. Resulted in savings of 5-7 rig days and $300,000 per well, while maintaining casing contingencies.

Houston, Texas, Us

► Drilling Engineer in charge of 3-4 horizontal rig lines drilling the Granite Wash & Cleveland unconventional plays in the Texas Panhandle, as well as the Cotton Valley gas play in East Texas.► Responsible for the entire drilling process, including cost estimation, well planning, rig schedule management, drillsite construction, vendor selection, drilling execution, real-time geosteering and problem solving, and post-well lookbacks.► Developed well design and casing program from scratch on a newly acquired asset and improved upon it through iterative feedback and redesign► Extensive exposure to mitigating lost circulation and real time geo steering in thin pay intervals, including utilizing advanced MWD technologies. In-depth casing and BHA design to improve drilling consistency and mitigate wellbore section risks. ► Experience with drilling long laterals (6,500'+ vertical section) at depths ranging from 8,000-11,000' total vertical depth.

► Engineer in charge of drilling and operations managing 1-2 drilling rigs and 1-4 workover rigs, primarily in the Panhandle West field northeast of Amarillo► Responsible for drilling (reentries and new drills), workovers, completions, and recompletions► Reported directly to US Vice-President of Operations► Exposure to well workovers and interventions (oil and gas wells), curve and tangent air drilling, depleted formations, cased hole reentries and sidetracking, and directional drilling with pendulum assemblies.

Oklahoma City, Ok, Us

► Drilling engineer in charge of a 3-rig drilling program in the Cleveland/Tonkawa tight sand play of the Anadarko Basin in the Western Oklahoma/Texas Panhandle region ► Drilled unconventional horizontal wells at depths up to 10,000' TVD and 15,000' MD► Cut 10-25% off drilling days and dry hole costs through the design of a single curve/lateral PDC directional BHA. ► Implemented novel industry lost circulation solution, sharply reducing or eliminating losses across short intervals of high rate mud losses, saving hundreds of thousands of dollars in OBM losses without requiring a time-consuming trip► Exposure to oil-based mud, pilot holes, narrow geologic target windows, and lost circulation zones.

Oklahoma City, Oklahoma, Us

► First 5 months spent in the field gaining experience and training in field operations, eventually working up to a night supervisor/company man role before being called into the office. ► Managed 2-3 rigs drilling rigs plus 1-2 spudder rigs in the Permian Basin of West Texas drilling a variety of wells, including vertical, S-curve directional, and horizontal► Drilled 65 Wolfberry vertical wells on 40-acre spacring in a 1-year period, reducing spud-to-TD times to under 7 days with dry hole costs under $700M► Planned and executed the company's first 20-acre vertical infill test wells► Planned the company's first horizontal Wolfcamp wells as 20- and 40-acre infill wells among 40- and 80-acre spacing vertical wells► Reduced drilling days 20% on Permian vertical rig program through design of a bit/BHA combination with enhanced hydraulics► Reduced drilling days and dry-hole costs in a Permian horizontal rig program through the design of a BHA capable of drilling both the curve and lateral, reducing the number of trips required and minimizing drilling risk► Exposure to high concentration H2S, high volume water flows, directional and horizontal wells, packer completions (liner packer completion and packer/cemented long string hybrid completion), coring (sidewall and whole-core), and multi-stage cement jobs for zonal isolation.

Oklahoma City, Oklahoma, Us

► Engineer-in-training working as a field logistics coordinator on an offshore drillship, managing the day to day operations of a fleet of up to 5 supply boats and 2 helicopters, cargo manifesting, and daily reporting. ► This position allowed me to gain valuable exposure to offshore drilling operations through field experience

London, England, Gb

► Drilling intern with the Rotary Drilling - Greater Prudhoe Bay team. ► Spearheaded BP Alaska's implementation of Mechanical Specific Energy (MSE) as a drilling efficiency metric for both post-drilling analysis and real-time monitoring for continuous drilling parameter enhancement► Identified drilling inefficiencies and performance limiters as a proof-of-concept for future large-scale rollout

London, England, Gb

► Drilling intern rotating on the Global Santa Fe (now Transocean) Development Driller II semisubmersible. ► Focused on evaluating the performance of a recently installed MI SWACO cuttings dryer system with respect to environmental impact (Retained Oil on Cuttings) and mud dilution rates. Quantified and presented results in terms of HSE goals and improved economics.