TN480 : Hydraulic fracture design in one of the Petroleum Engineering & Development Company wells
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2014
Authors:
Abstarct: The term of hydraulic fracture is used for occurring fracture in rock mass and extending by using fluid pressure. This technique was first experienced for stimulation of gas and oil wells but later on was suggested for determining in-situ stress and also obtaining new energy sources from the earth. Producting oil and gas by reservoir pressure will end to at most one 3rd of the reservoir hydrocarbon so we have to enhance oil reservoirs by using methods such as hydraulic fracturing.
Three important steps for having a successful hydraulic fracture operation is needed. At first, it's necessary to have a correct chosen well which has the proper condition for hydraulic fracture. Then it should be designed regarding to the mechanical earth model and reservoir specifications. At the end the operation should be done correctly by the operator.
In this research, in order to design hydraulic fracturing for a known well, a mechanical earth model of reservoir has been made by using logs and well test. In situ stress has been done obtaining the best criterion among different used criteria. Also the direction of stresses has been estimated fram a six arm caliper. The possibility of doing hydraulic fracture has been studied by using both mechanical earth model and reservoir condition. Finally acceptable zone for designing hydraulic fracture was chosen.
In the hydraulic fracturing design stage proper liquid and proppant according to reservoir condition have been chosen. As the first for modeling, acceptable zone was chosen from depth 2760 to 2913m and then by using model results and in-situ stresses, confirmed zone for hydraulic fracture design has been chosen from 2760 to 2800m. Hydraulic fracture economical studies have been done. Hydraulic fracture modeling has been done by using commercial software FracCADE (P3D and PKN methods) and GOHFER. Input data for software have been the same and there are more amount for pressure and fracture width by GOHFER. As the end sensitivity analysis and Parametric studies were employed, which determine in-situ stresses as the most important parameters for estimating pressure. Also it has been known that height of design, young modulus and viscosity have more effect on the geometry of fracturing.
Keywords:
#Hydraulic fracture #Mechanical Earth Model (MEM) #in-situ stress #FracCADE and GOHFER Link
Keeping place: Central Library of Shahrood University
Visitor:
Keeping place: Central Library of Shahrood University
Visitor: