kaz29Вестник Казахстанско-Британского технического университетаHerald of the Kazakh-British Technical University1998-66882959-8109Казахстанско-Британский Технический Университет10.55452/1998-6688-2026-23-3-544-564kaz29-3212Research ArticleНЕФТЕГАЗОВАЯ ИНЖЕНЕРИЯ И ГЕОЛОГИЯOIL AND GAS ENGINEERING, GEOLOGYНАБУХАНИЕ ГЛИН И НЕЦЕЛЕВОЙ РАСХОД РЕАГЕНТОВ ПРИ ГРП: ДИАГНОСТИКА И ОПЫТ ПРИМЕНЕНИЯ ПЛАСТОВОЙ ВОДЫ НА МЕСТОРОЖДЕНИИ ВОСТОЧНЫЙ МОЛДАБЕКCLAY SWELLING AND NON-TARGET CONSUMPTION OF FRACTURING FLUID ADDITIVES: DIAGNOSTICS AND FIELD EXPERIENCE USING FORMATION WATER AT THE VOSTOCHNY MOLDABEK FIELDhttps://orcid.org/0009-0000-9470-4225ДуйсалиевА. М.DiiisaliyevA. M.

Докторант

Алматы

Doctoral student

Almaty

e.nurbekova@kmg.kzhttps://orcid.org/0000-0002-1957-5168ИсмаиловА. А.IsmailovA. A.

PhD, к.т.н., профессор

Алматы

PhD, Candidate of Technical Sciences, Professor

Almaty

a.ismailov@kbtu.kzhttps://orcid.org/0009-0005-1148-4180МахмудовН. Н.MakhmudovN. N.

Д.т.н., профессор

Ташкент

Doctor of Technical Sciences, Professor

Tashkent

nazirillamaxmudov@gmail.comКазахстанско-Британский технический университетКазахстанKazakh-British Technical UniversityKazakhstanТашкентский государственный технический университет им. Ислама КаримоваУзбекистанTashkent State Technical University named after Islam KarimovUzbekistan202628092026233544564Copyright © Дуйсалиев А.М., Исмаилов А.А., Махмудов Н.Н., 20262026Дуйсалиев А.М., Исмаилов А.А., Махмудов Н.Н.Diiisaliyev A.M., Ismailov A.A., Makhmudov N.N.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.kbtu.edu.kz/jour/article/view/3212

Эффективность гидравлического разрыва пласта (ГРП) во многом определяется тем, насколько сохраняется проводимость трещины после взаимодействия жидкости ГРП с породой. В статье систематизированы механизмы повреждения проницаемости, связанные с водочувствительностью глинистых минералов, – межслоевое набухание смектита, осмотические эффекты, дефлоккуляция и миграция тонких частиц, – а также рассмотрены каналы нецелевого расхода стабилизаторов глин (KCl, четвертичные аммониевые соединения) и деструкторов геля (персульфат аммония, пероксид водорода, ферменты) на минералы породы и сопутствующие добавки. Показано, что номинальная дозировка реагента без учета материального баланса может одновременно завышать степень стабилизации глин и степень разрушения полимерной сетки. Предложена минимальная матрица лабораторных испытаний, включающая рентгенофазовый анализ ориентированных препаратов, изотермы сорбции, coreflood и тесты на удержанную проводимость трещины. На примере месторождения Восточный Молдабек (АО «Эмбамунайгаз») показано, что снижение проницаемости пласта при насыщении слабоминерализованной водой связано с набуханием глин и слюды, тогда как использование пластовой воды такой деградации не вызывает. Обоснована и реализована технология ГРП на пластовой воде с применением геля на основе полиакриламида взамен гуаровой камеди, неприменимой при минерализации воды более 130 г/л. По результатам ГРП на восьми скважинах дебит после обработки на пластовой воде и синтетическом полимере превысил показатели стандартной технологии более чем в пять раз.

The effectiveness of hydraulic fracturing (HF) largely depends on how well fracture conductivity is preserved after the fracturing fluid interacts with the reservoir rock. This paper systematizes the permeability-damage mechanisms related to the water sensitivity of clay minerals interlayer smectite swelling, osmotic effects, deflocculation and fines migration and examines the non-target consumption pathways of clay stabilizers (KCl, quaternary ammonium compounds) and gel breakers (ammonium persulfate, hydrogen peroxide, enzymes) on rock minerals and co-additives. It is shown that the nominal reagent dosage, evaluated without a material balance, can simultaneously overestimate both the degree of clay stabilization and the extent of polymer network degradation. A minimum laboratory testing matrix is proposed, including oriented-sample XRD analysis, sorption isotherms, coreflood tests and retained fracture-conductivity tests. Using the Vostochny Moldabek field (Embamunaigaz JSC) as a case study, it is shown that the permeability decline observed when the reservoir is saturated with low-salinity water is caused by clay and mica swelling, whereas formation water does not cause such degradation. A formation­water-based fracturing technology is substantiated and implemented, using a polyacrylamide-based gel instead of guar gum, which is unsuitable at a water salinity above 130 g/L. Field results from eight wells show that production rates after fracturing on formation water with the synthetic polymer exceeded those of the standard technology by more than five times.

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The authors declare that there are no conflicts of interest present.