Louisiana State UniversityPETE 4045EXAM 2 Key WITH REVISED AND PRECISE ANSWERS(FALL 2020)

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PETE 4045 – Drilling Engineering Exam 2 – Fall 2020 Instructor: Dr. Mauricio Almeida Student Name:_________________________________LSUID:89-__________ Student Listing Number:_________ Exam Ty... pe: 001 General Instructions:  This is a closed book exam.  Besides you calculator, electronic devices of any kind (mobile phones, iPods, pocket PC’s, etc) are prohibited.  Do not detach any sheet from your exam.  For multiple choice questions, clearly mark your single answer. More than one answer marked will imply in no grade (zero) for the question. Questions 11 to 14 – Partial Credit Given:  You must show your calculations and place the final answer in the box to receive full credit for your work. Use only the space allotted at the respective page to solve these questions.  Failure to indicate the units in your calculation will result in losing points.  Make and state clearly any assumptions that you believe are necessary. 10/25/2017 Craft & Hawkins Petroleum Engineering Department Louisiana State University1 1) Formations at different depths having the same porosity have also the same: (5 points) A. Overburden stress B. Grain density C. Effective vertical stress D. Pore pressure E. None of the above 2) A leak-off test is performed after ______________ to determine __________. (5 points) A. Cementing the casing / fracture pressure. B. Tripping out of the hole / pore pressure C. Cementing the casing / pore pressure D. Drilling to next casing depth / fracture pressure. E. Circulating for cement job / fracture pressure. 3) In an offshore wellhead, the production and intermediate casing are hung on the: (5 points) A. Low Pressure Housing B. Permanent Base C. Bell Nipple D. High Pressure Housing E. BOP 4) What is the main cause of abnormal formation pressure due to cement leak behind the casing: (5 points) A. Compaction effects B. Differential density effects C. Diagenetic effects D. Fluid migration effects E. Ballooning Effect 5) What is the effect of water depth on the operational drilling window when compared to an onshore well drilled to the same depth? (5 points) A. It increases the Effective Vertical stress of the formation with depth. B. It enlarges the operational window minimizing the risk of kicks. C. It reduces the area in the plot between the Formation Pore pressure and the Fracture Pressure curves. D. Do not affect the operational window since it is only water. E. It creates a longer transition between the normal to abnormal pressure zones.2 6) In regards of the force required to free differential stuck pipe, which of the parameters listed below are affected by the Drill Collar OD and mud weight, respectively: (5 points) A. Pressure differential (wellbore minus permeable formation pressures) / mud cake thickness. B. Effective area of contact with the mud cake / pore pressure. C. Thickness of mud cake / coefficient of friction (between the pipe and the borehole wall) D. Effective area of contact with the mud cake / Pressure differential (wellbore minus permeable formation pressures). E. Coefficient of friction (between the pipe and the borehole wall) / overburden load. 7) In the MPD webinar you were exposed to a few plots, like the ones below. What is being illustrated here? (3 points) A. Field test of an MPD well Offshore Norway that went perfect. B. How the upgraded MPD [Show More]

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