nznistuНауки о Земле и недропользованиеEarth sciences and subsoil use2686-99932686-7931Federal State Budget Educational Institution of Higher Education "Irkutsk National Research Technical University"10.21285/2686-9993-2021-44-4-397-407nznistu-176Research ArticleГеоинформатикаGeoinformaticsМоделирование поля тектонических напряжений и прогноз распределения трещин в сланцевом коллектореSimulation of tectonic stress field and prediction of fracture distribution in shale reservoirhttps://orcid.org/0000-0003-3669-3905ДинВэньлунDingWenlong

Дин Вэньлун, доктор геолого-минералогических наук, профессор, Школа Энергетических Ресурсов, Главная лаборатория эволюции морских резервуаров и механизма распространения углеводородов, Министерство образования, Главная лаборатория по разведке и оценке запасов сланцевого газа, Министерство земли и ресурсовг. Пекин

Wenlong Ding, Dr. Sci. (Geol. & Mineral.), Professor, School of Energy Resources, Key Laboratory for Marine Reservoir Evolution and Hydrocarbon Abundance Mechanism, Ministry of Education, Key Laboratory for Shale Gas Exploration and Assessment, Ministry of Land and Resources

Beijing

dingwenong2006@126.comЦзэнВэйтэZengWeite

Цзэн Вэйтэг. Хайкоу

Weite Zeng

Haikou

ВанЖуюэWangRuyue

Ван Жуюэ, Школа Энергетических Ресурсов, Главная лаборатория эволюции морских резервуаров и механизма распространения углеводородов, Министерство образования, Главная лаборатория по разведке и оценке запасов сланцевого газа, Министерство земли и ресурсовг. Пекин

Ruyue Wang, School of Energy Resources, Key Laboratory for Marine Reservoir Evolution and Hydrocarbon Abundance Mechanism, Ministry of Education, Key Laboratory for Shale Gas Exploration and Assessment, Ministry of Land and Resources

Beijing

ЦзюКайJiuKai

Цзю Кайг. Пекин

Kai Jiu

Beijing

ВанЧжэWangZhe

Ван Чжэг. Дунъин

Zhe Wang

Dongying

СуньЯсюнSunYaxiong

Сунь Ясюн, Школа Энергетических Ресурсов, Главная лаборатория эволюции морских резервуаров и механизма распространения углеводородов, Министерство образования, Главная лаборатория по разведке и оценке запасов сланцевого газа, Министерство земли и ресурсовг. Пекин

Yaxiong Sun, School of Energy Resources, Key Laboratory for Marine Reservoir Evolution and Hydrocarbon Abundance Mechanism, Ministry of Education, Key Laboratory for Shale Gas Exploration and Assessment, Ministry of Land and Resources

Beijing

ВанСинхуаWangXinghua

Ван Синхуа, Школа Энергетических Ресурсов, Главная лаборатория эволюции морских резервуаров и механизма распространения углеводородов, Министерство образования, Главная лаборатория по разведке и оценке запасов сланцевого газа, Министерство земли и ресурсовг. Пекин

Xinghua Wang, School of Energy Resources, Key Laboratory for Marine Reservoir Evolution and Hydrocarbon Abundance Mechanism, Ministry of Education, Key Laboratory for Shale Gas Exploration and Assessment, Ministry of Land and Resources

Beijing

Китайский университет геологических наукКитайChina University of GeosciencesChinaГеологическая служба ХайнаняКитайHainan Geological SurveyChinaПекинская нефтепромысловая корпорация ЦзиннэнКитайBeijing Jingneng Petroleum Corporation LimitedChinaШаньдун Кэжуй Групп Холдинг ЛимитедКитайShandong Kerui Group Holding Corporation LimitedChina202127122021444397407Copyright © Дин В., Цзэн В., Ван Ж., Цзю К., Ван Ч., Сунь Я., Ван С., 20212021Дин В., Цзэн В., Ван Ж., Цзю К., Ван Ч., Сунь Я., Ван С.Ding W., Zeng W., Wang R., Jiu K., Wang Z., Sun Y., Wang X.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.nznj.ru/jour/article/view/176

Статья представляет способ прогнозирования трещиноватости сланцевых коллекторов, основанный на методе конечных элементов с использованием моделирования поля напряжений, деформационных тестов на одноосное и трехосное сжатие, а также испытаний акустической эмиссии на сжатие. Учитывая характеристики трещин при растяжении и сдвиге, которые в основном возникают в сланцах, богатых органическими веществами, были использованы критерии Гриффита и Кулона – Мoра для расчета скоростей роста трещин при растяжении и сдвиге в сланцевых коллекторах. Кроме того, общая скорость роста трещин в сланцевых коллекторах была рассчитана на основе отношения трещин растяжения и сдвига к общему количеству трещин. Этот метод был эффективно применен для прогнозирования распределения трещин в сланцевом коллекторе формации Лунмаси нижнего силура на юго-востоке Чунцина, Китай, и он обеспечивает новый способ оптимизации перспективных месторождений сланцевого газа. Результаты моделирования имеют важное значение для проектирования горизонтальных скважин для добычи сланцевого газа и создания программ по реконструкции гидроразрыва пласта.

In this paper, a finite element-based fracture prediction method for shale reservoirs was proposed using geostress field simulations, uniaxial and triaxial compression deformation tests, and acoustic emission geostress tests. Given the characteristics of tensile and shear fractures mainly developed in organic-rich shales, Griffith and Coulomb – Mohr criteria were used to calculate shale reservoirs' tensile and shear fracture rates. Furthermore, the total fracture rate of shale reservoirs was calculated based on the ratio of tension and shear fractures to the total number of fractures. This method has been effectively applied in predicting fracture distribution in the Lower Silurian Longmaxi Formation shale reservoir in southeastern Chongqing, China. This method provides a new way for shale gas sweet spot optimization. The simulation results have a significant reference value for the design of shale gas horizontal wells and fracturing reconstruction programs.

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