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The Ph.D. degree represents the highest degree awarded by universities in the United States. The Ph.D. degree usually requires course work beyond that required by a master’s degree program in the same discipline, but is primarily characterized by the Ph.D. dissertation requirement. The Ph.D. dissertation should contain significant original research and should contain material suitable for publication as refereed manuscript or manuscripts, normally as a research journal article or articles. The recipient of a Ph.D. degree should possess a broad knowledge of his or her discipline and should be prepared for a lifetime of creative intellectual inquiry. The Ph.D. dissertation should establish the candidate’s ability to read and comprehend the literature, to independently formulate a significant intellectual problem, to formulate the solution to the problem utilizing state-of-the-art knowledge and creativity, and to communicate the findings in a lucid, professional document, the Ph.D. dissertation.
An applicant must have a baccalaureate degree in engineering, physics, or mathematics from an accredited institution. Applicants to the PhD program with a baccalaureate degree in a field other than petroleum engineering may be required to take additional deficiency classes in the areas of reservoir engineering, production engineering and drilling engineering.
A student with a baccalaureate degree may be considered for admission to the Ph.D. program provided that the student’s academic record satisfies the following conditions:
- An undergraduate Grade Point Average of 3.5 or greater.
- A composite Grade Point Average of 3.5 or greater in mathematics, science, engineering science and engineering undergraduate courses taken as an undergraduate.
- A quantitative GRE scores greater than or equal to 160.
The preceding requirements are considered minimal and do not guarantee direct admission to the Ph.D. program.
For international students, at the discretion of the Graduate Advisor, the requirements regarding grade point average may be replaced by a rank in the top five percent of the student’s graduating class or the top ten percent of the student’s graduating class provided the student baccalaureate degree is from a university from which we have admitted other students into our Ph.D. program.
A student without a Master’s degree who is admitted into the Ph.D. program must:
- Maintain at least a 3.5 Grade Point Average in the first 18 hours of graduate work at the 7000 or 8000 level, and
- Complete the Ph.D. Qualifying exams and attain a pass or repeat result within two years of his or her first enrollment.
Candidates who fail to meet the preceding two requirements will be dismissed from the Ph.D. program but have the option of transferring to the Master’s program.
Any student who is admitted to a Master’s degree program may apply for transfer to the Ph.D. program after completion of 18 hours of graduate course work at the 7000 level or above provided the student’s GPA in such course work is at least 3.5.
All applicants must take the General Tests of the Graduate Record Examination prior to admission and have an official copy of the scores submitted to the Graduate School. It is emphasized that the above requirements are minimum requirements. It is expected that the qualifications of students entering the program will substantially exceed the minimum requirements. A student who meets only the minimum requirements in each of the above areas will, normally, be denied admission.
The number of candidates in this program, both part-time and full-time, is limited. Normally, part-time students are not admitted to this program. Applicants must designate their major fields of research interest.
Applicants usually are selected for admission by February 1 and September 1, but will be considered throughout the year.
All applicants from non-English-speaking countries who have not received a degree from a U.S. university must satisfy English proficiency requirements (minimum TOEFL score of 80 on the internet-based test or 550 on the paper test). A minimum score of 6.0 on the IELTS examination may be substituted for the TOEFL.
The Ph.D. program requires at least 78 approved credit hours of graduate credit above the baccalaureate level, generally distributed in the following manner:
- At least 20 credit hours of research and dissertation (including master’s degree thesis).
- At least 42 hours of graduate credit in course work, including a maximum of 9 hours of approved 6000 level courses listed in this bulletin for graduate credit. A maximum of six hours of independent study will be allowed. The core courses, PE 7013 , PE 7023 , and PE 7063 , must be included in the first 27 hours of graduate work.
- At least 12 credit hours of course work must be taken outside the discipline.
Students may be required to complete prerequisite undergraduate courses without graduate credit, resulting in a program of more than 78 credit hours. No more than 6 hours of transfer credit beyond the master’s degree from an accredited institution may be counted toward the course requirements if acceptable to the advisory committee.
These requirements are not variable except under special circumstances and with permission of the student’s advisory committee and the Dean of the Graduate School.
Language and Residence
A candidate for the Ph.D. degree in engineering must demonstrate competence in a computer language and/or in one foreign language through readings of material in his or her major field of study. Material for this requirement is selected with the approval of the candidate’s advisory committee. At least two consecutive semesters in residence at The University of Tulsa as a full-time student are required.
A student in the Ph.D. program will be advised initially by a graduate faculty member recommended by the graduate program advisor and approved by the Dean of the Graduate School. The student should select a general research area and a research advisor or co-advisors for the dissertation by the end of two semesters after enrollment in the program. The advisor or co-advisors, after consultation with the student, recommend the other members of the advisory committee to the Dean of the Graduate School.
The advisory committee must have at least four members, two of whom must be petroleum engineering graduate faculty members, at least one of whom must be a University of Tulsa graduate faculty member from a department other than Petroleum Engineering, and one of whom may be a qualified expert in the research area from outside the University.
The advisory committee assists with the student’s program of course work, approves the dissertation topic, and administers the final dissertation oral examination.
The Ph.D. qualifying exams are designed to indicate whether a student has the intellectual creativity necessary to do Ph.D. research. Problems on a Ph.D. qualifying exam should be different from problems that the students taking the exam have seen before.
Questions on Ph.D. qualifying exams presume background knowledge normally held by the holder of a B.S. degree in petroleum engineering who has also taken undergraduate courses in partial differential equations and either linear algebra or matrix theory. Questions may also assume that the examinee has taken the core courses PE 7013 , PE 7023 and PE 7063 .
Students wishing to take Ph.D. qualifying exams must inform the department chair in writing four weeks prior to the exam week. The exams will normally be administered once per year, immediately preceding the first week of the fall semester. In the event that a candidate (or candidates) must retake the exam (see discussion on grading), a second exam will be offered prior to end of the fall semester following the August exams; the dates for this exam will be set by the department chairman.
The Ph.D. qualifying exams consist of three four-hour exams. Each of the three exams consists of six questions and the examinee is asked to solve exactly four questions on each exam. Each full-time petroleum engineering faculty member will prepare two or three questions upon the request of the department chair.
The Graduate Program Coordinator formulates the three exams at his discretion with the provision that no individual exam will contain more than one question prepared by an individual faculty member. Each question is graded on a zero to ten basis. Since each examinee is asked to solve a total of 12 problems, the maximum grade possible is 120.
- A grade of 75/120 or more shall constitute a passing grade.
- A grade less than 65/120 shall constitute a failing grade.
Any student who has scored less than 65/120 will be dismissed from the program at the end of the fall semester immediately following the August qualifying exams. The faculty shall consider three options for any student who receives a grade on the qualifying exams greater than or equal to 65/120 and less than 75/120, namely,
- the student shall be dismissed from the program at the end of the fall semester following the August qualifying exams which he or she failed;
- the student shall be awarded a passing grade. Option (b) will be permissible only if the student has received a grade greater than 70/120;
- the student shall be required to take the next set of Ph.D. qualifying exams. This option will only be available to students taking the August exam; decisions regarding students who take a second qualifying exam during the fall semester and whose grades are greater than or equal to 65/120 and less than 75/120 shall be based solely on options (a) and (b) above.
Which of the preceding options will apply will be determined by a secret ballot of all full time petroleum engineering graduate faculty members who attend the meeting at which the results of the Ph.D. qualifying exams are discussed. The selection of option (b) or (if applicable) option (c) will require an absolute majority vote of the faculty. If option (b) or (c) is not selected by an absolute majority vote, the student will be dismissed from the program, i.e., option (a) shall prevail. For students receiving a grade greater than 70/120, option (b) will be voted on first, then, if applicable, option (c).
Each student shall be informed of the outcome by his or her advisor, or, in the absence of the advisor, by the Department Chair. The Department Chair shall notify the Dean of the Graduate School of all results.
A student who enters the doctoral program directly from the M.S. program at The University of Tulsa must take the first set of Ph.D. qualifying exams offered after he or she is admitted to the doctoral program. A student who enters the doctoral program after having completed an M.S. degree in petroleum engineering at another college or university must take the first set of Ph.D. qualifying exams offered after his or her first semester in petroleum engineering at The University of Tulsa. A student who enters the doctoral program after having completed a M.S. degree in a discipline other than petroleum engineering must take the first set of Ph.D. qualifying exams offered after his or her second semester in petroleum engineering at The University of Tulsa. Any exception to this policy must be approved by a two-thirds majority of the full-time faculty by a secret ballot.
For a student who has passed his or her Ph.D. qualifying exams, the final step for admission to candidacy for the Ph.D. degree requires that he or she prepare a typed research proposal five to fifteen pages in length which outlines the research proposed for the Ph.D. dissertation. The student’s advisor may provide general suggestions on the preparation of this proposal but should not write the proposal. The completed research proposal must be submitted to each full-time faculty member and members of the dissertation committee.
The advisor will convene a meeting with the student and the dissertation committee at which the student will present the research proposal. All faculty members are invited to this presentation. This meeting should take place at least a year before the student’s graduation. Subsequent to this meeting, the dissertation committee shall recommend one of the following:
- The student shall be admitted to candidacy for the Ph.D. degree.
- The student shall make committee-recommended revisions to the proposal prior to being admitted to candidacy for the Ph.D. degree.
The advisor will notify the department chair upon the student’s successful completion of all requirements.
A student cannot be admitted to candidacy until the language requirement has been fulfilled, qualifying examinations have been passed, and the research proposal has been approved.
Each candidate must write a dissertation on the results of his research. The dissertation must demonstrate the candidate’s ability to conduct independent research in the area of interest and must contribute to some field of science or engineering technology. The dissertation must follow the Graduate School’s recommended procedures for submission to the student’s advisory committee, and before final typing or reproduction, must be presented to the full advisory committee for examination and review. A letter grade is not given for the dissertation; it is graded on a pass-fail basis.
Final Oral Examination
Each candidate must pass a final oral examination before the advisory committee. The examination will consist of a public defense of the dissertation and cover the general field of the dissertation as well as other parts of the program which may be chosen by the committee.
The advisory committee recommends the candidate to the Dean of the Graduate School for the Ph.D. degree upon successful completion of the final oral examination and acceptance of the dissertation. Passing grades must be obtained in all the dissertation hours to fulfill degree requirements.