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Abstract Teaching petroleum engineers requires a balance between mathematics and engineering or in other words between abstract concepts and the real world. Several scientists have shown that visual aids help students to learn better and to retain the knowledge. Furthermore, students pay more attention to gadgets and high-tech systems because they were born in this contemporary era. Teaching using multimedia has become standard practice, but students tend to lose the link to reality. Several years ago, a new concept of teaching undergraduate and graduate students was introduced at Clausthal University of Technology, based on the implementation of hands-on teaching systems that not only expose the students to physical models, but also require them to build such models or to generate experiments using existing models. The results from the 3-year experience at Clausthal University of Technology show an improved learning capability of the students, in combination with better knowledge transfer efficiency between teacher and students. This paper presents the results of students’ competitions held at Clausthal University of Technology as part of their studies. For example, a comparison is made between the outcomes of groups that chose to work on high-tech multimedia tasks versus those students who built more conventional tools (e.g. a surge and swab simulator, a hoisting system model and a laminar flow rig). Finally, the students’ feedback concerning the hands-on teaching concept will be summarized in this paper.
Abstract Cement durability is very important to maintain proper well isolation and stability under HPHT conditions. In the process of well completion and production, pressure decline and temperature variation with time can contribute to cement failure and wellbore stability issues. However, there is no available investigation in the durability and comparison of different types of cement at higher temperature and at different operational scenarios. Three different types of cement (72 pcf, 101 pcf and 118 pcf) commonly used in the Middle East were cured and tested at 300°F in the study. The tests included one year mechanical properties measurement such as compressive strength development, Young's modulus and Poisson's ratio. Finite element method was used to analyze the failure probability of HPHT wells over with time. At the variation of bottom hole pressure and temperature, the casing, cement, and formation system failure probability was studied for these types of cement. The results show that the pressure variation has more effect on the wellbore stability than the temperature variation for HPHT wells. Low density cement can improve the wellbore stability issues due to the cement elastic behavior. This paper introduces the operational envelope for every type of cement investigated in order to achieve successful operations based on field conditions. Field cases were discussed to validate the results of this investigation.
- North America > United States > Texas (0.70)
- Asia > Middle East > Saudi Arabia > Eastern Province > Al-Ahsa Governorate (0.28)
- North America > United States > New Mexico > San Juan Basin (0.99)
- North America > United States > Colorado > San Juan Basin (0.99)
- North America > United States > Arizona > San Juan Basin (0.99)
- (16 more...)