CRITICAL REVIEW ON EFFECTS OF PORE TYPE CLASSIFICATIONS ON PORE PRESSURE AND ITS ESTIMATION TECHNIQUES
Determining pore pressure is one of the main vital factors to be considered in a pre-drilling phase of each development plan. This is because with the right pore pressure estimated, proper casing design and drilling fluid can be used which in turn can save money, lives and environments. If wrongly p...
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| Format: | Thesis |
| Language: | English |
| Published: |
2014
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| Online Access: | http://utpedia.utp.edu.my/13959/1/Muhammad%20Iqmarul%20Alimin%20Bin%20Md%20Sambri%2C%20G02371%2C%20Individual%20Project%20MSc%20PE%202014.pdf http://utpedia.utp.edu.my/13959/ |
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| Summary: | Determining pore pressure is one of the main vital factors to be considered in a pre-drilling phase of each development plan. This is because with the right pore pressure estimated, proper casing design and drilling fluid can be used which in turn can save money, lives and environments. If wrongly predicted, accidents and unwanted problems such as blowouts and wellbore instability can occur. In this project study, a relationship between pore types, their classifications with pore pressure was first examined by reviewing previous published works. An indirect correlation was found between pore type and pore pressure but a rather direct correlation for pore type to porosity was found where different pore types and their classifications give different porosity. It was found that there are three different basic types of pores which are reference, stiff and cracks. They are different in aspect ratio corresponding to different porosity values. Hence for a certain porosity value, there must be a certain pore pressure. This pore pressure can be calculated on different methods. The different approaches on prediction methods were assessed and critical evaluation was made on them to find the advantages, disadvantages, limitations and assumptions on each, focusing into solving the problems and as a part of the objectives of this research. The best prediction method chosen was with the use of acoustic or sonic log with electrical log in determining this pore pressure. It also could be combined with the existing core and log data from a field observed. |
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