View in EDS HTML Full Text PDF Full Text

Preventing sour gas kicks during workover of natural gas wells from deep carbonate reservoirs with anti‐hydrogen sulfide fuzzy‐ball kill fluid.

Saved in:
Bibliographic Details
Title: Preventing sour gas kicks during workover of natural gas wells from deep carbonate reservoirs with anti‐hydrogen sulfide fuzzy‐ball kill fluid.
Authors: Yan, Zhenfeng1,2 (AUTHOR), Okere, Chinedu J.3 (AUTHOR), Zeng, Xinghang4 (AUTHOR), Yao, Zhonghui5 (AUTHOR), Su, Guandong3 (AUTHOR), Gan, Maozong3 (AUTHOR), Fu, Yarong6 (AUTHOR), Tao, Xiujuan3,7 (AUTHOR) taoxiujuan@sust.edu.cn, Zheng, Lihui1,3 (AUTHOR) zhenglihui@cup.edu.cn
Source: Energy Science & Engineering. Aug2022, Vol. 10 Issue 8, p2674-2688. 15p.
Subject Terms: *Gas wells, *Carbonate reservoirs, *Natural gas, *Antihydrogen, *Gas reservoirs, *Hot rolling
Abstract: Workover of natural gas wells in deep carbonate gas reservoirs (DCRs) is facing multiple challenges such as fluid leakage, high temperature, and hydrogen sulfide (H2S) gas kick. Hence, well‐killing fluids with satisfactory plugging ability, high‐temperature tolerance, and anti‐H2S ability are necessary. In this study, we developed a multifunctional anti‐hydrogen sulfide fuzzy‐ball kill fluid (AFKF) for preventing sour gas kicks in DCRs. The performance of the AFKF was optimized and analyzed via experiments and verified through a case study application. The results showed that the fuzzy‐ball structures in the AFKFs demonstrated good stability under extreme H2S aging. The rate of change of certain critical rheological parameters such as apparent viscosity, dynamic plastic ratio, and density of AFKFs before and after hot rolling were no more than 5%. After plugging the fractures with the AFKFs at temperatures between 110°C and 150°C, the inlet driving pressure of the fractures increased from 20.73°C to 21.07 MPa, and no fluid loss was observed at the core outlet after a secondary displacement of formation water. The permeability recovery rate was greater than 90%. Application of AFKF in well DW‐2 showed that the shut‐in pressure rose to 24.6 MPa with no trace of H2S gas at the wellhead after 4 days. The investigation of the H2S mitigation mechanisms revealed that the plugging of the seepage channels by AFKFs forms interconnected bonds that improve the mechanical properties of the reservoir. Additionally, AFKFs absorb H2S gases by protonation and dissociation reactions which convert the hazardous gas into an aqueous solution of sulfide ions (S2−). The proposed AFKF has proven to be effective means of mitigating H2S in DCRs, and minimize the negative impacts of environmental polution, health risks, and equipment corrosion. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: enr
DbLabel: Energy & Power Source
An: 158428858
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Preventing sour gas kicks during workover of natural gas wells from deep carbonate reservoirs with anti‐hydrogen sulfide fuzzy‐ball kill fluid.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Yan%2C+Zhenfeng%22">Yan, Zhenfeng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Okere%2C+Chinedu+J%2E%22">Okere, Chinedu J.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zeng%2C+Xinghang%22">Zeng, Xinghang</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yao%2C+Zhonghui%22">Yao, Zhonghui</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Su%2C+Guandong%22">Su, Guandong</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gan%2C+Maozong%22">Gan, Maozong</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fu%2C+Yarong%22">Fu, Yarong</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tao%2C+Xiujuan%22">Tao, Xiujuan</searchLink><relatesTo>3,7</relatesTo> (AUTHOR)<i> taoxiujuan@sust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zheng%2C+Lihui%22">Zheng, Lihui</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> zhenglihui@cup.edu.cn</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Energy+Science+%26+Engineering%22">Energy Science & Engineering</searchLink>. Aug2022, Vol. 10 Issue 8, p2674-2688. 15p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Gas+wells%22">Gas wells</searchLink><br />*<searchLink fieldCode="DE" term="%22Carbonate+reservoirs%22">Carbonate reservoirs</searchLink><br />*<searchLink fieldCode="DE" term="%22Natural+gas%22">Natural gas</searchLink><br />*<searchLink fieldCode="DE" term="%22Antihydrogen%22">Antihydrogen</searchLink><br />*<searchLink fieldCode="DE" term="%22Gas+reservoirs%22">Gas reservoirs</searchLink><br />*<searchLink fieldCode="DE" term="%22Hot+rolling%22">Hot rolling</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Workover of natural gas wells in deep carbonate gas reservoirs (DCRs) is facing multiple challenges such as fluid leakage, high temperature, and hydrogen sulfide (H2S) gas kick. Hence, well‐killing fluids with satisfactory plugging ability, high‐temperature tolerance, and anti‐H2S ability are necessary. In this study, we developed a multifunctional anti‐hydrogen sulfide fuzzy‐ball kill fluid (AFKF) for preventing sour gas kicks in DCRs. The performance of the AFKF was optimized and analyzed via experiments and verified through a case study application. The results showed that the fuzzy‐ball structures in the AFKFs demonstrated good stability under extreme H2S aging. The rate of change of certain critical rheological parameters such as apparent viscosity, dynamic plastic ratio, and density of AFKFs before and after hot rolling were no more than 5%. After plugging the fractures with the AFKFs at temperatures between 110°C and 150°C, the inlet driving pressure of the fractures increased from 20.73°C to 21.07 MPa, and no fluid loss was observed at the core outlet after a secondary displacement of formation water. The permeability recovery rate was greater than 90%. Application of AFKF in well DW‐2 showed that the shut‐in pressure rose to 24.6 MPa with no trace of H2S gas at the wellhead after 4 days. The investigation of the H2S mitigation mechanisms revealed that the plugging of the seepage channels by AFKFs forms interconnected bonds that improve the mechanical properties of the reservoir. Additionally, AFKFs absorb H2S gases by protonation and dissociation reactions which convert the hazardous gas into an aqueous solution of sulfide ions (S2−). The proposed AFKF has proven to be effective means of mitigating H2S in DCRs, and minimize the negative impacts of environmental polution, health risks, and equipment corrosion. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=158428858
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1002/ese3.1158
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 2674
    Subjects:
      – SubjectFull: Gas wells
        Type: general
      – SubjectFull: Carbonate reservoirs
        Type: general
      – SubjectFull: Natural gas
        Type: general
      – SubjectFull: Antihydrogen
        Type: general
      – SubjectFull: Gas reservoirs
        Type: general
      – SubjectFull: Hot rolling
        Type: general
    Titles:
      – TitleFull: Preventing sour gas kicks during workover of natural gas wells from deep carbonate reservoirs with anti‐hydrogen sulfide fuzzy‐ball kill fluid.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Yan, Zhenfeng
      – PersonEntity:
          Name:
            NameFull: Okere, Chinedu J.
      – PersonEntity:
          Name:
            NameFull: Zeng, Xinghang
      – PersonEntity:
          Name:
            NameFull: Yao, Zhonghui
      – PersonEntity:
          Name:
            NameFull: Su, Guandong
      – PersonEntity:
          Name:
            NameFull: Gan, Maozong
      – PersonEntity:
          Name:
            NameFull: Fu, Yarong
      – PersonEntity:
          Name:
            NameFull: Tao, Xiujuan
      – PersonEntity:
          Name:
            NameFull: Zheng, Lihui
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 08
              Text: Aug2022
              Type: published
              Y: 2022
          Identifiers:
            – Type: issn-print
              Value: 20500505
          Numbering:
            – Type: volume
              Value: 10
            – Type: issue
              Value: 8
          Titles:
            – TitleFull: Energy Science & Engineering
              Type: main
ResultId 1