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EMEC Well Data Simulator

The EMEC Well Data Simulator (EWDS) is a proprietary suite to deliver design, evaluation and simulation of significant drilling challenges.

EWDS is a set of integrated modules that concentrates on drilling hydraulics and modeling wellbore pressures and temperatures during all phases of the drilling operation in extended-reach, highly deviated, horizontal and high temperature and high pressure (HTHP) wells. The simulator uses state of the art algorithms and provides the user with a wide range of modeling options.

The simulator includes a well trajectory and planning model for single or multiple well directional profiles, whether computed or imported from other directional survey service providers. The well trajectories are displayed in 3-D profile.

EWDS calculates and evaluates down-hole temperatures during drilling, circulating and shut-in operations for land and deep-water wells. A finite difference mathematical model has been developed to predict well bore and formation transient temperature behavior during drilling, fluid circulation and shut-in operations. This includes wells with multiple temperature gradients and well bore deviations, based on the fluids physical characteristics. The PVT model accurately calculates ECD and ESD according to formation and wellbore temperature profiles.

EWDS can be used to analyze and optimize the hydraulics program for complex wells where there is a tight tolerance between ECD and fracture pressure, or pore pressure and fracture pressure. It takes into account the down-hole effects on rheological properties and mud density, in addition to the effects of RPM, tool-joints, cuttings loading, and pipe eccentricity on pressure loss calculations, enabling accurate predictions of ECDs.

The Dynamic hole-cleaning module supported with a 3-D virtual reality window and graphical representation enables the display of static and moving cuttings bed heights, cuttings concentration, carrying capacity index and transport ratio, taking into account the rate of penetration, RPM, down-hole density profile and rheological properties, as well as absolute hole eccentricity.

The dynamic Surge & Swab module determines optimum running speeds while tripping pipe and running casing. The model calculates the pressure required to break mud gels, taking into account the down-hole density and rheological properties either statically or after a dynamic process . 

The Torque & Drag module is used to validate well designs and prevent lost rig time by eliminating drilling string failure. The model plays an important role in many well operations by revealing when well friction may become a limiting factor in drilling. The model has been developed to improve well planning design through reduced torque and drag, and for more realistic drill string design and surface equipment selection. The model uses a wide range of well parameters integrated with well plan surveys and/or actual data to enable prediction of tension and compression loading and torque limits on the drill string during well operations. It also predicts whether the string will reach planned well TD, or if the forces resulting from friction will exceed allowable limits. The model also predicts any buckling of the string along the way. 

The Displacement module offers a tool to model the displacement process and optimize the input parameters according to the simulated results to safe rig time. The Module optimizes the number of pump stages according to the calculated maximum flow rate to prevent wellbore instability.

The results of the module are represented numerically and graphically showing bit hydraulics, down hole pressure and temperature, and real time pressure loss and equivalent densities.

 

Benefits of Well Data Simulation

  • Planning, design and implementation for actual drilling environments
  • Cost savings (Design refinments can be made according to simulation results)
  • Optimized structural performance thorough analysis
  • Eliminate trial-and-error during actual operations
  • Predict and correct potential problems before they occur
  • Perform an extensive analysis for potential problems
  • Address troubleshooting and engineering solutions for critical situations
  • Provide a comprehensive assessment for critical parameters
  • Apply new technology to minimize non-productive time

 

EWDS Modules

  • Heat Transfer
  • Well Temperature including different water temperature gradients and pressure profiles
  • Thermo-Physical properties of Drilling Fluids
  • Survey Data and 3-D Well Path Trajectory
  • 3–D Well Geometry Model
  • PVT Models for Base Fluids
  • Hydraulics Models
  • Rheology predictions for down-hole conditions.
  • Fracture Gradient Model including Fracture Gradient calculations based on formation characteristics
  • Hole Displacement Module
  • Bit Optimization Module
  • Hole Cleaning and Cuttings Transport Model
  • 3–D Flow Visualization using (CFD)
  • ECD Management
  • Dynamic Surge & Swab for calculating the effects of Surge & Swab on annular pressures and ECD in the wellbore
  • Dynamic Torque & Drag/Buckling

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