Last 2 digits: 58 Last 3 digits: 858
QBB4073Z 2 1. a. You are as signed to inte rpret the ge omechanics of a fractured carbonate at a specific site . Th e table shows information on the properties of the rock sample taken from the site . TABLE Q1 : Saturated limeston e core da ta s et taken at the site. Parameter Description Fracture Ang le (แต) Last 2 digit of your ID Cohesive Strength (MPa) Last 2 digit of your ID Water Saturation in Core (%) Last 2 digit of your ID Confining Stress (MPa) Last 3 digit of your ID i. T he fracture s are observe to be in motion . Il lustrate the core under stress, design the Mohr Circle with assumptions of values that are not provided and justify your interpretation in detail. [ 15 marks] ii . If another core is a non - sedimentary rock exhibiting the same properties , a ssume the rock strength values of both cores , interpret the deformation behaviour and provide technical reasoning to your interpretation . Name the non - sedimentary rock in the discussion . [15 m arks] iii. U pscale your fractures from core scale to reservoir scale.Assuming t he core is fully saturated with oil , elaborate the hydrofracturing that may occur and propose a plan for stimulation on the fractured reservoir system . [10 marks] QBB4073Z 3 2. A team has cond uc ted a r eservoir characteriza tion to a coal bed formation. The fractu red reservoir system was characterized with an aerial scale of 100 x 100 km. FIGURE Q 2 : Fractured reservoir characterization interpreted by Zhang et a l. (2015). a. Given the average matrix permeability of 30%, and the last two digi t of your I D as the average fracture porosity. Interpret the reservo ir issues that may occur and propose the solution. [20 marks] b. If the coal bed reservoir is replaced with a granite oil basement, exhibitin g the same fracture intensity, fracture porosity and fracture permeability containing 500 MMbbl, design a brief field development plan by including the number of wells and production rate for each well. [20 marks] c. You are required to present your findings to the stackholder. Defend your proposal in part (b) , on the decision whether to develop or not the fractured reservoir system, based on geomechanics and economics perspective . [20 marks] โ END OF PAPER โ
