BP Multi-Lateral PWRI Spreadsheet Model

This model is now in the PWRI Toolbox as Multilateral/Multilayer model.

Basic Description of the Model

Fluid flow in a deviated well is first modeled for both laminar and turbulent flow. Various pressure losses such as frictional loss along the pipe and perforation friction are considered explicitly. Both matrix injection with formation damage and fracturing injection are considered. The fracturing model considers a fracture with a fixed fracture height. Stress changes due to temperature and pore pressure changes are considered. Formation damage due to suspended solids and oil in water is considered. Permeabilities in the vertical and horizontal directions do not need to be the same. The well can be vertical or deviated.

The model is capable of modeling produced water re-injection into multiple zones such as for multi-lateral wells. The input data include the initial in-situ stresses, original reservoir pressure and temperature, drainage radius, coefficient of linear thermal expansion, poro-elastic properties, well trajectory, water quality, absolute permeability and end point relative permeability, the k_v/k_h ratio, fracture toughness, Young’s modulus, the Poisson’s ratio, etc. The calculated data include injection rate into each zone, injection pressure and injectivity, whether it is matrix injection in each zone or fracturing injection. If it is fracturing injection, the fracture length and width are calculated.

<BPOPE BPOPE   Click to return to a summary of the BPOPE model.

GEOSIM Model > GEOSIM Model from Duke Engineering   Click on this for a summary Duke Engineering's GEOSIM Model. This model considers many of the differences between conventional hydraulic fracturing and long term, lower rate water injection.