Senior Geomechanicist, Oman

Muscat, Oman

Skillpool group: Petroleum Engineering
Updated: 09-Apr-2019
Reference ID: 104487BR

Purpose:
The Senior Geomechanicist will be a member of the Technology Pilot Team that will be responsible for continuous improvement in well inflow performance through the maturation of technology in general and hydraulic fracturing technology in particular. He/she will be responsible for the geomechanical work for well delivery planning and operations and will contribute to pilot designs and field development planning.
Accountabilities:
  • Collect and interpret information on in-situ stress state as a function of depth, based on data gathered by operators and in the open literature. Integrate analog data in well design, learning from previous wells (comparative analysis). Master latest technologies to gain insight in stress state: leek-off tests, flowback, injection tests, etc., and seek out top-quality stress information.
  • Work with production technologist to model hydraulic fracturing to stimulate production from low-porosity low-permeability (tight) well-consolidated sandstone. Provide input parameters like stress state and static rock mechanics properties for input in hydraulic fracturing models.
  • Drive data acquisition to verify correctness of the models, e.g. fracture height, lateral extent). Be well-versed with structural-geology analyses on natural faulting mechanisms, and how this relates to in-situ stress and control of lithology on it. Be able to interpret natural fracture information from borehole image data (in cooperation with petrophysicist)
  • Collect and interpret data on pore fluid pressure. Be active during field data acquisition, owning the data acquisition procedure including HSE aspects (e.g. in case of overpressured zones).
  • Model fracture gradient; wellbore fluid pressure at which irreversible fluid losses occur, and master how fracture gradient changes with hole angle and azimuth
  • Develop robust pressure-depth plot, including uncertainty, on the basis of which casing depths, mudweight and operational guidelines (like weight-on-bit, etc.) can be designed. Align with staff from other disciplines, notably well engineers, production technologists and reservoir engineers to make sure the information in the pressure-depth plot is well understood.
  • Analyse petrophysical data to determine static (slow-loading) mechanical properties like Young’s modulus and Poisson’s ratio
  • Take ownership of a 1D Mechanical Earth Models which include mechanical stratification for selection of completion (perforation, etc.).
  • Use Mechanical Earth Models model for wellbore stability prediction, advice on optimal mudweight and operational parameters like mud composition, casing depth, ROP, hole cleaning etc. Align with drillers.
  • Design field data acquisition (in close cooperation with petrophysicists and production technologist) to close any gaps in understanding the rock mechanics parameters of reservoir and sealing rock (both above and below target zone), and to be able to calibrate the models.
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