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Investigation of Cementing Failures in Deepwater Brunei

SU’IF HAJI ZAINAL ABIDIN, MOHAMMAD ZYDEN (2012) Investigation of Cementing Failures in Deepwater Brunei. Masters thesis, UNIVERSITI TEKNOLOGI PETRONAS.

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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.

Item Type: Thesis (Masters)
Divisions: Geoscience and Petroleum Engineering
Depositing User: Users 2156 not found.
Date Deposited: 11 Sep 2012 11:58
Last Modified: 25 Jan 2017 09:40
URI: http://utpedia.utp.edu.my/id/eprint/3478

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