TYPE CURVES FOR PRODUCTION TRANSIENT ANALYSIS OF MULTILATERAL WELLS IN NATURALLY FRACTURED SHALE GAS RESERVOIRS

Open Access
Author:
Saxena, Aditya
Graduate Program:
Energy and Mineral Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
March 30, 2012
Committee Members:
  • Turgay Ertekin, Thesis Advisor
Keywords:
  • Multilateral Wells
  • Shale Gas
  • Directional Drilling
Abstract:
Growing demand for oil and natural gas and depletion of conventional reserves has led to the advancement of technology to economically produce oil and natural gas from the unconventional reserves. These unconventional reserves include shale gas, tight gas, coal bed methane and methane hydrates. This study is focused on shale gas reservoirs which are source rocks containing hydrocarbons. The shale gas reservoir has very low permeability values which range from micro-Darcy to nano-Darcy. Shale gas reservoirs are naturally fractured systems and they exhibit dual-porosity characteristics. We need advanced technologies to produce economically from these reservoirs. Multilateral wells are one of the new alternatives in field development because they can increase the productivity from this class of reservoirs and reduce the cost of field development. In this study, the production transient response of dual-porosity systems with different configurations of multilateral wells is analyzed with the help of dimensionless log-log graphs. Some scaling factors are proposed to reduce the number of type curves. The data for the type curves are generated by using a commercial numerical simulator. The resulting type curves are used to calculate the reservoir properties from the field data. Two case studies are presented for validation of these type curves.