Best Practices

Mechanical Properties

As in stimulation scenarios, fracture length is strongly dependent on the leakoff. "However, net pressure in the fracture is affected by K_C, fracture friction and the factors controlling fracture containment (height) such as the confining stress profile with depth and modulus contrast in the same manner as in conventional fracturing. Therefore, once the p_foc is fixed, the mechanical properties do not change the fracture length match. However, they determine the net pressure which is evident during pressure falloff test (PFOT) analysis." The preceding is not necessarily true. Modulus strongly impacts thermal stresses. Also, Gheissary et al., 1998, and other researchers have established that, particularly for layered formations, different mechanical properties can yield entirely different fracture geometries for the same pressure.

<Differences

Differences Click here to return to an introduction to some of the differences between stimulation and PWRI fracturing models. If you want to go back to a different page, select the link from the table below.

Differences From Stimulation Models

An Introduction to PWRI Models

PWRI Models

Rate>

Rate Are there usually significant differences in injection rate between stimulation and PWRI fracturing operations? Sometimes yes. Sometimes not! If you want to skip forward, you can select from links in the table below.

Differences From Stimulation Models

Types of PWRI Models

Audit of PWRI Models

Models Differences Top Previous Main Documents