Technical Part 2

Question 1

What 3 parameters you need to consider when you are designing a hydraulic fracture?

Answer 1

1. Poission’s Ratio
2. Young’s Moduls (YM)
3. Minimum or maximum stess (most important parameter)

Question 2

Why min or max stress is important?

Answer 2

Will decide the fracture, as orientationm height, width, surface pressure and possible prop crush or embedment

Question 3

Waht is Young’s Module

Answer 3

YM is the relationship between stress an dstrain. Is the elasticy model that describes rock deformation.

YM = Stess/ Strain

Question 4

How the fracture will propagate?

Answer 4

Fractures propagate perendicular to the minimum in situ stress

Question 5

What is Anisotropy?

Answer 5

When the physical properties are different as you change direction

Question 6

Waht are some ways to determine stress?

Answer 6

DataFrac, (Caltest though shut-in, Minifrac, WL stress logs (sonic), Core test)

Question 7

What is the rule of thumb for FG?

Answer 7

< 0.8 psi/ft vertical fracture

> 1.0 psi/ft Horizonatl fracture

Question 8

What do we call a successful hydraulic fracture?

Answer 8

1. Contained
2. Adequate fracture length, height and width
3. Conductivity achieved

Question 9

Fracture Geometry types of models

Answer 9

3D models - goss height is calucalted from stress

• P3D- Pseduo 3D
• PL3D -Planar 3D

2D models- gross, leak off and net height are the same

• KGD X_L< h
• PKN - X_L > h
• Radial X_L = h/2