WELL-KILLING FLUID INFLUENCE ON DECLINE OF PERMEABILITY DURING WELL COMPLETION IN CARBONATE RESERVOIRS
Link for citation: Sentemov A.A., Dorfman M.B. Well-killing fluid influence on decline of permeability during well completion in carbonate reservoirs. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 6, рр.35-46. In Rus. Relevance. Carrying out repair operati...
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ftdoajarticles:oai:doaj.org/article:149eba7d20fa49169021bf16631b8432 2023-07-30T04:06:12+02:00 WELL-KILLING FLUID INFLUENCE ON DECLINE OF PERMEABILITY DURING WELL COMPLETION IN CARBONATE RESERVOIRS Andrey A. Sentemov Mikhail B. Dorfman 2023-06-01T00:00:00Z https://doi.org/10.18799/24131830/2023/6/4067 https://doaj.org/article/149eba7d20fa49169021bf16631b8432 RU rus Tomsk Polytechnic University http://izvestiya-tpu.ru/archive/article/view/4067 https://doaj.org/toc/2500-1019 https://doaj.org/toc/2413-1830 doi:10.18799/24131830/2023/6/4067 2500-1019 2413-1830 https://doaj.org/article/149eba7d20fa49169021bf16631b8432 Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 334, Iss 6 (2023) Well-killing fluid permeability bottomhole formation zone carbonate reservoirs iron compounds Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 article 2023 ftdoajarticles https://doi.org/10.18799/24131830/2023/6/4067 2023-07-09T00:35:24Z Link for citation: Sentemov A.A., Dorfman M.B. Well-killing fluid influence on decline of permeability during well completion in carbonate reservoirs. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 6, рр.35-46. In Rus. Relevance. Carrying out repair operations in production and injection wells with improperly selected well-killing fluid can lead to significant decrease in the permeability of the bottomhole formation zone. The important problem of well operations is the preservation of reservoir filtration properties. The main aim of this work is to study the effect of various additives in the well-killing fluid compositions on the reservoir properties and to identify approaches to prevent complications during workover and well servicing. Methods: empirical and analytical methods. Under laboratory conditions, the chemical composition, optical density and light transmission coefficient of well-killing fluids and formation water were determined. Modeling of formation fluids filtration was performed on a core study unit. Results. The main bottomhole zone permeability decrease reason during well-killing operations in the Timan-Pechora oil and gas province is the high iron ions content in formation waters. Formation waters of the Famennian horizon contain 60–70 mg/l of iron. To solve the problem of bottomhole zone filtration characteristics decline, it is necessary to significantly reduce the iron content in the well-killing fluids or prevent precipitation of iron compounds. Analysis of the solutions optical density results show effectiveness of the oxyethylene diphosphonic acid and AKSIS-KS for clarification and stabilization of well-killing fluids with the content of hydrated iron ions up to 70 mg/l. Based on the conducted filtration experiments, in order to reduce the negative effect of iron compounds on the permeability, it is recommend the use an iron stabilizer oxyethylene diphosphonic acid 2,0 % (with an iron ion content up to 70 mg/l) and a hydrophobiser Neftenol-K 1 ... Article in Journal/Newspaper Pechora Directory of Open Access Journals: DOAJ Articles Rus’ ENVELOPE(155.950,155.950,54.200,54.200) Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 334 6 35 46 |
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Well-killing fluid permeability bottomhole formation zone carbonate reservoirs iron compounds Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
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Well-killing fluid permeability bottomhole formation zone carbonate reservoirs iron compounds Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 Andrey A. Sentemov Mikhail B. Dorfman WELL-KILLING FLUID INFLUENCE ON DECLINE OF PERMEABILITY DURING WELL COMPLETION IN CARBONATE RESERVOIRS |
topic_facet |
Well-killing fluid permeability bottomhole formation zone carbonate reservoirs iron compounds Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
description |
Link for citation: Sentemov A.A., Dorfman M.B. Well-killing fluid influence on decline of permeability during well completion in carbonate reservoirs. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 6, рр.35-46. In Rus. Relevance. Carrying out repair operations in production and injection wells with improperly selected well-killing fluid can lead to significant decrease in the permeability of the bottomhole formation zone. The important problem of well operations is the preservation of reservoir filtration properties. The main aim of this work is to study the effect of various additives in the well-killing fluid compositions on the reservoir properties and to identify approaches to prevent complications during workover and well servicing. Methods: empirical and analytical methods. Under laboratory conditions, the chemical composition, optical density and light transmission coefficient of well-killing fluids and formation water were determined. Modeling of formation fluids filtration was performed on a core study unit. Results. The main bottomhole zone permeability decrease reason during well-killing operations in the Timan-Pechora oil and gas province is the high iron ions content in formation waters. Formation waters of the Famennian horizon contain 60–70 mg/l of iron. To solve the problem of bottomhole zone filtration characteristics decline, it is necessary to significantly reduce the iron content in the well-killing fluids or prevent precipitation of iron compounds. Analysis of the solutions optical density results show effectiveness of the oxyethylene diphosphonic acid and AKSIS-KS for clarification and stabilization of well-killing fluids with the content of hydrated iron ions up to 70 mg/l. Based on the conducted filtration experiments, in order to reduce the negative effect of iron compounds on the permeability, it is recommend the use an iron stabilizer oxyethylene diphosphonic acid 2,0 % (with an iron ion content up to 70 mg/l) and a hydrophobiser Neftenol-K 1 ... |
format |
Article in Journal/Newspaper |
author |
Andrey A. Sentemov Mikhail B. Dorfman |
author_facet |
Andrey A. Sentemov Mikhail B. Dorfman |
author_sort |
Andrey A. Sentemov |
title |
WELL-KILLING FLUID INFLUENCE ON DECLINE OF PERMEABILITY DURING WELL COMPLETION IN CARBONATE RESERVOIRS |
title_short |
WELL-KILLING FLUID INFLUENCE ON DECLINE OF PERMEABILITY DURING WELL COMPLETION IN CARBONATE RESERVOIRS |
title_full |
WELL-KILLING FLUID INFLUENCE ON DECLINE OF PERMEABILITY DURING WELL COMPLETION IN CARBONATE RESERVOIRS |
title_fullStr |
WELL-KILLING FLUID INFLUENCE ON DECLINE OF PERMEABILITY DURING WELL COMPLETION IN CARBONATE RESERVOIRS |
title_full_unstemmed |
WELL-KILLING FLUID INFLUENCE ON DECLINE OF PERMEABILITY DURING WELL COMPLETION IN CARBONATE RESERVOIRS |
title_sort |
well-killing fluid influence on decline of permeability during well completion in carbonate reservoirs |
publisher |
Tomsk Polytechnic University |
publishDate |
2023 |
url |
https://doi.org/10.18799/24131830/2023/6/4067 https://doaj.org/article/149eba7d20fa49169021bf16631b8432 |
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ENVELOPE(155.950,155.950,54.200,54.200) |
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Rus’ |
geographic_facet |
Rus’ |
genre |
Pechora |
genre_facet |
Pechora |
op_source |
Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 334, Iss 6 (2023) |
op_relation |
http://izvestiya-tpu.ru/archive/article/view/4067 https://doaj.org/toc/2500-1019 https://doaj.org/toc/2413-1830 doi:10.18799/24131830/2023/6/4067 2500-1019 2413-1830 https://doaj.org/article/149eba7d20fa49169021bf16631b8432 |
op_doi |
https://doi.org/10.18799/24131830/2023/6/4067 |
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Bulletin of the Tomsk Polytechnic University Geo Assets Engineering |
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334 |
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