MidtermExamNo1_2010_Solution

MidtermExamNo1_2010_Solution - MIDTERM EXAM No. 1 Thursday,...

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MIDTERM EXAM No. 1 Thursday, March 4, 2010 2:00 - 3:30 PM, Room ECJ 1.202 PGE368 Spring Semester 2010 Fundamentals of Well Logging Instructor: Carlos T. Verdín, Ph.D. MIDTERM EXAM No. 1 CONCEPTUAL AND QUANTITATIVE QUESTIONS SOLUTION SET IMPORTANT REMARKS: Answers are in red, For quantitative problems, range of expected results is in blue (between brackets), For itemized questions, the number of points assigned to a particular item is in green , and For some questions, partial credit for procedure is in brown . DO NOT FORGET TO WRITE DOWN YOUR NAME!!! As stated in the course syllabus, this final exam will count 28% toward your final grade.
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INSTRUCTIONS : (1) Wherever applicable, provide brief and direct answers to the questions. Convoluted and/or vague answers will not be given partial credit. (2) Your answers should be written only within the allotted space and in an organized manner. (3) WRITE ONLY ON ONE SIDE OF THE PAPER. (4) Your handwriting should be clear and legible. (5) You will be given no more than 1.25 hours to complete this part of the exam (6) Notice that each question is worth different points toward the grand total of 100 points. (7) Class notes, textbooks, journal articles, etc., will not be allowed in the classroom during the exam.
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THE FOLLOWING QUESTIONS ARE WORTH 2 POINTS EACH: 1. In which situation/situations would one expect the electrical resistivity of a clean, water-saturated sand to be ABOVE the resistivity shale baseline? (check all that apply) ; very low salinity of connate water ; very low porosity ; very high residual hydrocarbon saturation ± very high irreducible water saturation 2. Which of the following logs CANNOT be acquired in the presence of oil- base mud? (check all that apply) ; SP ± Gamma ray ± PEF ± Density 3. In which of the following cases will the gamma-ray log NOT respond to clay content? (check all that apply) ; Sands intermixed with volcanic ash ± Dolomite mixed with limestone ± Conglomerates cemented with calcite ± Sandstones composed of dolomitic grains 4. Which of the following logs WILL NOT be affected by presence of barite in the mud? (check all that apply) ± Gamma Ray ; MSFL ± PEF ; SP ; Deep resistivity 5. Which of the following conditions will decrease the SSP response (absolute value of SP measured with respect to the SP shale baseline) of an otherwise clean, water-saturated sand shouldered by shale beds? (check
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MidtermExamNo1_2010_Solution - MIDTERM EXAM No. 1 Thursday,...

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