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51318-11081-Non-acidic Multi-Functional Iron Sulfide Scale Dissolver for High Temperature Sour Wells

Picture for Non-acidic Multi-Functional Iron Sulfide Scale Dissolver for High Temperature Sour Wells
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This paper introduces a new developed non-acid iron sulfide scale dissolver with multi-function of well stimulation, and gives a guideline of selection criteria and procedure for iron sulfide dissolver for high temperature application.

Product Number: 51318-11081-SG
Author: Tao Chen / Qiwei Wang / Frank Chang / Esmael Albelharith
Publication Date: 2018
Industry: Oil and Gas Production
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$20.00
$20.00

A non-acidic multifunctional iron sulfide scale dissolver has been developed as one of the efficient and cost-effective alternatives for removing iron sulfide dominated scale deposited both in the downhole tubular and near wellbore region. Compared with three typical conventional iron sulfide scale dissolvers (THPS, pH neutralized chelate and traditional chelate), this newly developed iron sulfide dissolver showed significantly better performance on pyrrhotite, calcite and field iron sulfide scales, and much less corrosive at high temperature. Different with the traditional HCl acid based iron sulfide scale dissolver, this new dissolver is non-corrosive, no H2S generation and iron sulfide re-precipitation problems, which is significantly improve the efficient and safe operations. In addition, the new developed iron sulfide dissolver showed multifunctional characteristic of well stimulation, addressed and confirmed by dynamic coreflood evaluation and CT scan technique.

This paper introduces a new developed non-acid iron sulfide scale dissolver with multi-function of well stimulation, and gives a guideline of selection criteria and procedure for iron sulfide dissolver for high temperature application. It can be applied to iron sulfide dissolution in both sour oil and gas wells.

Key words: Iron sulfide, dissolver, multi-functional, non-acidic, sour

A non-acidic multifunctional iron sulfide scale dissolver has been developed as one of the efficient and cost-effective alternatives for removing iron sulfide dominated scale deposited both in the downhole tubular and near wellbore region. Compared with three typical conventional iron sulfide scale dissolvers (THPS, pH neutralized chelate and traditional chelate), this newly developed iron sulfide dissolver showed significantly better performance on pyrrhotite, calcite and field iron sulfide scales, and much less corrosive at high temperature. Different with the traditional HCl acid based iron sulfide scale dissolver, this new dissolver is non-corrosive, no H2S generation and iron sulfide re-precipitation problems, which is significantly improve the efficient and safe operations. In addition, the new developed iron sulfide dissolver showed multifunctional characteristic of well stimulation, addressed and confirmed by dynamic coreflood evaluation and CT scan technique.

This paper introduces a new developed non-acid iron sulfide scale dissolver with multi-function of well stimulation, and gives a guideline of selection criteria and procedure for iron sulfide dissolver for high temperature application. It can be applied to iron sulfide dissolution in both sour oil and gas wells.

Key words: Iron sulfide, dissolver, multi-functional, non-acidic, sour

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51318-10545-SEARCHING FOR IRON SULFIDE SCALE DISSOLVER FOR DOWNHOLE APPLICATIONS

Product Number: 51318-10545-SG
Author: Qiwei Wang, Tao Chen, Frank Chang, Waleed Al-Nasser
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Latest developments in iron sulfide dissolver studies. Lab tests performed to evaluate some new products for thermal stability, corrosivity, compatibility with formation water, and dissolving authigenic mineral and field deposits.
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51316-7264-New Developments in Iron Sulfide Scale Dissolvers

Product Number: 51316-7264-SG
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Author: Tao Chen
Publication Date: 2016
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This paper presents the latest laboratory results on iron sulfide dissolver evaluation. The recently developed dissolvers were studied for their dissolving powers using iron sulfide scale solids and the corrosion rate to mild steel at elevated temperature. Based on these results, the technical gaps and future developments for iron sulfide dissolvers are discussed.
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11266 Under Deposit Corrosion From Iron Sulfide

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ISBN: 2011 11266 CP
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