Investigation of Cementing Failures in Deepwater Brunei
Well No.2 is a well at Block CA-2 deepwater Brunei where it is located in the east of Block CA-1 and west of Block SKE (Malaysia) and is about 100 km from Brunei shore. The sediments in Block CA-2 have thicker, young sediments which ranging in age, mainly derived from late Miocene to present Bara...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2012
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| Online Access: | http://utpedia.utp.edu.my/3478/1/Mohammad_Zyden_Su%E2%80%99if.pdf http://utpedia.utp.edu.my/3478/ |
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| Summary: | Well No.2 is a well at Block CA-2 deepwater Brunei where it is located in the east of
Block CA-1 and west of Block SKE (Malaysia) and is about 100 km from Brunei
shore. The sediments in Block CA-2 have thicker, young sediments which ranging in
age, mainly derived from late Miocene to present Baram Delta. The reservoir is
deepwater turbidite sandstone and source rocks are present within turbidites and
Mass Transport Deposits deposition. Unique combinations of temperature and
pressure, young formations and potential shallow flow zones have driven the design
of cement properties to overcome these challenges.
The purpose of this study is to investigate and determine causes of cementing
failures encountered during the actual cementing jobs in deepwater Brunei, where
cements slurry was found to be soft and took longer time to harden, which
contributes to high non-productive time. Recommend optimum strategy or process is
also implemented for future operation. The Ishikawa Diagram was employed to list
down possible causes of the cementing failure. Each possible error was further
analysed through laboratory test.
In short, analysis of cementing failure led to the awareness that reassessment of
cementing program is required to determine the nature of the poor cement job. This
thesis also describes the importance of using lightweight cement and constant
monitoring of laboratory test, mechanical operations and Equivalent Circulating
Density to minimise the severity of cement failure. |
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