Detection and identification of scales using cased hole gamma ray measurement and its treatment to enhance gas production: A case study of Miano Field. | [Proceedings SPE-PAPG Annual Technical Conference • 2009]

Author(s):

1. Udo B. Bregar: OMV, Islamabad, Pakistan

2. Tofeeq Ahmad: OMV, Islamabad, Pakistan

3. Amjad Hussain: OMV, Islamabad, Pakistan

4. Lukas Wihardjo: OMV, Islamabad, Pakistan

5. Muzammil Ahmed Khidri: Schlumberger, Data & Consulting Services, Islamabad, Pakistan

6. Muhammad Haroon Mughal: Schlumberger, Data & Consulting Services, Islamabad, Pakistan

7. Karakoch Thaisiri: Schlumberger, Data & Consulting Services, Islamabad, Pakistan

Abstract:

Scale deposition is one of the major threats to flow assurance which creates serious problems to maintain production and minimize operating costs. An effective detection method and proper treatments are key to minimize the production losses. This paper discusses a case study in Miano Field where scale has been detected with a new method – Cased Hole Gamma Ray measurement – and the proper Scale removal treatment has been applied based on the solubility analysis of the scale sample. The scale rmoval brought the gas production back to original levels and in one case to even higher production. The Cased Hole Gamma Ray measurement has been proven quite effective to detect the presence of scale, due to radioactive content proven by the Scale XEM/EDAX analysis. The Scale solubility analysis has proven that more than 95% of it is soluble in 10% HCl acid. The case studies of Miano field have brought a new game plan for operations, to enhance the gas production. It is based on historical well observations, since no water production had been observed at the surface in one of the case studies, so scale was not considered to cause the production decline. Therefore the method of Cased Hole Gamma Ray measurement can be, in some cases, the only indication of scale build-up if other indicators are missing. Furthermore it’s also an effective method to prove scale build-up inside perforations if hole is fully accessible.

Page(s): 197-212

DOI: DOI not available

Published: Journal: Proceedings SPE-PAPG Annual Technical Conference, Volume: 0, Issue: , Year: 2009

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