Sensitivity analysis on well placement

Cstjf, France
10 Nov 2016
25 Dec 2016
Oil and Gas
Contract Type
Full Time
Job Description
The ability of shale to fracture and maintain an open fracture is influenced by mechanical shale properties and in-situ stresses. An accurate knowledge of elastic properties (Young's modulus, Poison's ratio), unconfined compressive strength, hardness and mineral content of the rock might help with fracture predictions. Furthermore, the knowledge of formation (intrinsic variations, degree of laminations, presence and orientation of planes of weaknesses ), and in-situ stress field and its contrast between geological layers are necessary for a better fracture prediction.
In this study, we would like to test different landing points for the horizontal well and compare the resulting hydraulic fracturing geometry. Furthermore in this test, we will determine what properties are most important influencing the geometry and conductivity of hydraulic fracturing. The model will be used to perform sensitivities on various mechanical and reservoir properties to investigate how and why the stress field changed. The different attributes on which the sensitivity will be conducted are: elastic rock properties, strength, stress anisotropy, minimum horizontal stress. Influence of the natural fractures network through fracture intensity and fracture orientation will be also studied.
The final purpose is to rank and weight the different properties and assign some uncertainties to them. The sensitivity analysis will be conducted on a particular shale play of interest for Total. The modeling will be performed using Schlumberger commercial software.

Profile sought
Type de formation: école d'ingénieur
Niveau d'étude: 2ème ou 3ème année
Connaissances techniques: géosciences in general but any mechanics knowledge is appreciable
Connaissances linguistiques: français: courant; anglais: courant