Petrel Tutorial Guide

Do you plan to to a numerical reservoir simulator like ECLIPSE or INTERSECT? Share public link

Well Top (Surface Control Point) ↓ ~~~~~~~~~~~~•~~~~~~~~~~~~~~~~~~~~~~~ ← Modeled Top Horizon Surface \ / \ / ← Fault Pillars (Grid Segments) \ / ~~~~\~~~~~~~/~~~~~~~~~~~~~~~~~~~~~~~ ← Modeled Base Horizon Surface ``` ### Horizon Making * Execute the **Make Horizon** process from the structural modeling workflow. * Input your interpreted seismic horizons and tie them to physical **Well Markers** to eliminate depth mismatch errors. * Specify whether horizons are conformable (parallel), erosional, or base-lapping surfaces. ### Layering and Zoning * Build distinct **Zones** to represent major geological formations. * Utilize the **Make Layering** function to slice zones into thin, discrete grid cells. * Choose from layering strategies such as **Proportional**, **Follow Top**, or **Follow Base** depending on your reservoir's depositional environment. --- ## 4. Property Modeling (Facies & Petrophysics) Property modeling populates your 3D grid cells with realistic petrophysical values. This stage bridges the gap between static geology and fluid simulation. ### Well Log Upscaling * Cells intersecting a well path must capture log data via the **Scale Up Well Logs** process. * Choose an averaging method: **Arithmetic** for porosity, **Geometric** for permeability, and **Most Of** for discrete facies data. ### Facies Modeling * Go to **Property Modeling -> Facies Modeling** to categorize lithology distribution. * Use **Sequential Indicator Simulation (SIS)** for random, pixel-based deposition. * Use **Object Modeling** to populate specific geometric shapes like meandering river channels. ### Petrophysical Modeling * Open the **Petrophysical Modeling** dialog box. * Populate your grid with continuous reservoir data such as porosity, permeability, and water saturation. * Distribute porosity values using **Sequential Gaussian Simulation (SGS)**, conditioned directly to your facies map. * Apply a deterministic formula or cloud-transform function to calculate your final permeability distribution from the modeled porosity. --- ## 5. Volumetric Calculation and Export The final stage of the static workflow involves calculating initial Hydrocarbons-In-Place and setting up your model for downstream simulator applications. ### Volume Calculations * Open the **Volume Calculation** process tool. * Input critical reservoir constants: Fluid contacts (Oil-Water Contact or Gas-Oil Contact), Net-to-Gross ratios, Formation Volume Factor ($B_o$), and Initial Gas Saturation ($S_gi$). * Run the calculations to extract Gross Rock Volume (GRV), Net Sand Volume, Pore Volume, and **Stock Tank Oil Initially In Place (STOIIP)**. ### Simulation Case Export * Select **Define Simulation Case** to transition your static model into a dynamic model. * Map grid properties to keywords compatible with industry-standard numerical engines like [Schlumberger ECLIPSE](https://slb.com) or [INTERSECT](https://slb.com). * Export the generated grid geometry and property distributions as raw `.GRDECL` or `.DATA` file structures. --- If you want to tailor this guide further, let me know: * What specific **Petrel version** you are using. * If your reservoir is focused on **clastic (channels)** or **carbonate (fractured)** settings. * Whether you intend to export to **ECLIPSE** or **INTERSECT** simulators. Share public link

Petrel projects can become large and complex. petrel tutorial

Fault modeling is a crucial phase. It defines the tectonic skeleton of your reservoir and establishes how fluid paths are segmented.

Well data bring ground truth. In the Well Correlation window, users load well tops (formation boundaries) and display curves. Key operations include: Do you plan to to a numerical reservoir

Define your fluid zones and contacts (e.g., Oil-Water Contact [OWC] or Gas-Oil Contact [GOC]). Input your fluid parameters: Gas Formation Volume Factor ( Bgcap B sub g ) Map your properties to the calculation engine: Net-to-Gross (NTG) Porosity ( Water Saturation ( Swcap S sub w

Now we bring well logs into the 3D grid. * Choose from layering strategies such as **Proportional**,

Because well logs sample data at half-foot intervals, you must average (upscale) these values to match the coarser vertical grid cells of your 3D model. Property Upscaling Steps Open the process in the Process Diagram.