Qualitative and Quantitative Integrity Evaluation of HPHT Gas well Containing Sour Gas

Abstract:

The well integrity issues are more and more prominent. There is an ever increasing need for methods that evaluate and confirm the status of wells with suspect integrity. Two well integrity evaluation methods are presented. The qualitative method is based on the international published standards. And the qualitative results are obtained. For the quantitative one, the well is divided into 3 parts (well head, completion string, and well bore), and then 7 elements. The evaluation criterion of each element is set. The weight coefficient which each element affects the well integrity is obtained using the analytic hierarchy process (AHP). Then the quantitative well integrity evaluation mode is established. The well integrity risk rank can be obtained based on the well parameters. Most of the parameters can be easily got from the oilfield database. The qualitative and quantitative methods could be combined each other. The methods are tested in Tarim oil field, and the results are satisfying.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 1359-1364
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.1359
• Online since: September 2013
• Authors: Yun Wang, Wen Kui Li, Jun Li
• Keywords: Evaluation, HTHP, Integrity, Qualitative, Quantitative

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