1 (a) A well is being planned by PETRONAS for a location in Sabah, Malaysia. The depth, and pore pressure data for the well is presented in Table Q1. A 7" production casing set at 14 000 ft is required for the completion of the well. Propose the number of casing strings needed to reach this depth objective safely and select the casing setting depth of each string. Allow a 4 pcf trip margin, and a 4 pcf kick margin when making the casing seat selections. The minimum length of surface casing required to protect the freshwater aquifers is 2000ft. Approximately 210 ft of conductor casing drilled through with 9.2 ppg mud was generally required to prevent washout on the outside of the conductor. Table Q1 True Vertical Depth (ft) Pore pressure (psi) 3000 1320 5000 2450 8300 4067 8500 4505 9000 5984 9500 6810 10000 7800 11000 10171 12000 11320 14000 13245 (26 marks) (b) Use the depth (feet) versus equivalent mud density (pcf) profile for this well to propose the casing depths, casing types, casing sizes, and bit sizes for the completion of the well. Assuming you are provided with the following bit sizes: 32, 26, 17 1/2, 12 1/4, 8 1/2, and 6 1/2inches, and casing sizes: 30, 20, 13 3/8, 9 5/8, and 7 inches. marks) (14