Fracturing Considerations in Mid Permeability Gas Condensate Formations (Russian)

Butula, Kreso Kurt; Yudin, Alexey; Magdeyev, Igor; Chernyak, V.; Samoilov, Mikhail

doi:10.2118/176577-ru

SPE Russian Petroleum Technology Conference 2015

DOI: 10.2118/176577-ru

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Fracturing Considerations in Mid Permeability Gas Condensate Formations (Russian)

Kreso Kurt Butula

Alexey Yudin

Igor Magdeyev

et al.

Abstract: Авторское право 2015 г., Общество инженеров нефтегазовой промышленности Этот доклад был подготовлен для презентации на Российской нефтегазовой технической конференции SPE, 26 -28 октября, 2015, Москва, Россия.Данный доклад был выбран для проведения презентации Программным комитетом SPE по результатам экспертизы информации, содержащейся в представленном авторами реферате. Экспертиза содержания доклада Обществом инженеров нефтегазовой промышленности не выполнялась, и внесение исправлений и изменений является обя… Show more

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Cited by 10 publications

References 8 publications

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Unlocking Additional Barrels From a Mature Conventional Oil Field Through Unconventional Technologies: A Case Study on Rangely Oil Field, Colorado

Ketineni

Tan

Hoffman

et al. 2019

SPE Annual Technical Conference and Exhibition

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Demonstrating the viability of multistage hydraulic fractured horizontal wells to unlock otherwise trapped resources is presented through a case study on Rangely. A combination of high-fidelity reservoir models was employed for accurate forecasts and evaluation of hydraulically fractured horizontal wells to improve resources in this mature conventional oil field with ongoing pressure support and tertiary recovery operations. The modeling techniques used in this method can be extended to other mature oil fields to unlock bypassed oil setting a precedent to re-evaluate mature oil fields with the new unconventional completion technologies. The Rangely Weber Sand Unit is an Eolian sandstone depositional system consisting of 2 billion bbls of oil in place. The Weber Formation is Pennsylvanian to Permian in age, and typically consists of fine-grained and cross bedded calcareous sandstones. Structurally oil is trapped in an anticline with varying dip angles on the flanks. The oil production from this reservoir was managed through primary depletion for the first two decades of production followed by secondary recovery via water flood and concluding through water alternating CO2 injection (WAG) over the last three decades. Due to the heterogeneity in depositional environment, the recovery factors have been low in the eastern end of the field. The east end of the field has relatively lower permeability and lower porosity compared to the rest of the field. A modeling workflow is presented to assist with evaluation and optimization of hydraulically fractured horizontal infill wells to recover bypassed oil in the eastern end of the Rangely field. A full fidelity static model was built based on dense, high quality well control data. A sector model was history matched, and then used to update pressure, saturations, and stress distribution to present day. The history matched model was subsequently used to evaluate horizontal well performance and hydraulic fracturing completion options to overcome these heterogeneities and improve recovery from a lower quality reservoir. Completions optimization opportunities were focused on fracture geometry, incremental Estimated Ultimate Recovery (EUR), and economics. Sensitivity studies demonstrated that an optimal balance of cost and recovery is found at the low end of fracture volumes and wider perforation cluster spacing. Forecasting runs show incremental economic recovery which otherwise could not have been recovered through ongoing WAG operations.

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Unlocking Additional Barrels From a Mature Conventional Oil Field Through Unconventional Technologies: A Case Study on Rangely Oil Field, Colorado

Ketineni

Tan

Hoffman

et al. 2019

SPE Annual Technical Conference and Exhibition

View full text Add to dashboard Cite

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Complex Approach to Stimulate Gas Formations Serves Eastern Siberia

Kapkaev

Yudin

Paskhalov

et al. 2020

Day 2 Wed, September 23, 2020

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The main purpose of jobs execution on the medium-permeability Parfenov horizon of the Chorskaya suite, its new site for research, was to confirm the effectiveness of the hydraulic fracturing to determine further ways to optimize and increase the economic feasibility of developing gas and gas condensate fields in the Eastern Siberia. The chosen strategy has made a tangible contribution to the successful realization of the project. This manuscript describes an integrated approach to performing hydraulic fracturing on a gas-bearing area in the Irkutsk region. The lithological features of the formation structure and the existing temperature and pressure conditions were taken into account. Numerous laboratory tests were carried out to optimize the fluid design before the hydraulic fracturing campaign, including the selection of a destructor system. To confirm the results of the final treatments, independent well tests were performed. The method of channel fracturing (pumping proppant with pulses) chosen for this project is currently successfully and widely used in Western Siberia and all the accumulated experience has been successfully adapted to the challenges of the unique formations of Eastern Siberia.

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High-Resolution and Multimaterial Fracture Productivity Calculator for the Successful Design of Channel Fracturing Jobs

Chuprakov

Belyakova

Glaznev

et al. 2021

Day 3 Thu, October 14, 2021

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We developed a high-resolution fracture productivity calculator to enable fast and accurate evaluation of hydraulic fractures modeled using a fine-scale 2D simulation of material placement. Using an example of channel fracturing treatments, we show how the productivity index, effective fracture conductivity, and skin factor are sensitive to variations in pumping schedule design and pulsing strategy. We perform fracturing simulations using an advanced high-resolution multiphysics model that includes coupled 2D hydrodynamics with geomechanics (pseudo-3D, or P3D, model), 2D transport of materials with tracking temperature exposure history, in-situ kinetics, and a hindered settling model, which includes the effect of fibers. For all simulated fracturing treatments, we accurately solve a problem of 3D planar fracture closure on heterogenous spatial distribution of solids, estimate 2D profiles of fracture width and stresses applied to proppants, and, as a result, obtain the complex and heterogenous shape of fracture conductivity with highly conductive cells owing to the presence of channels. Then, we also evaluate reservoir fluid inflows from a reservoir to fracture walls and further along a fracture to limited-size wellbore perforations. Solution of a productivity problem at the finest scale allows us to accurately evaluate key productivity characteristics: productivity index, dimensional and dimensionless effective conductivity, skin factor, and folds of increase, as well as the total production rate at any day and for any pressure drawdown in a well during well production life. We develop a workflow to understand how productivity of a fracture depends on variation of the pumping schedule and facilitate taking appropriate decisions about the best job design. The presented workflow gives insight into how new computationally efficient methods can enable fast, convenient, and accurate evaluation of the material placement design for maximum production with cost-saving channel fracturing technology.

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Fracturing Considerations in Mid Permeability Gas Condensate Formations (Russian)

Cited by 10 publications

References 8 publications

Unlocking Additional Barrels From a Mature Conventional Oil Field Through Unconventional Technologies: A Case Study on Rangely Oil Field, Colorado

Unlocking Additional Barrels From a Mature Conventional Oil Field Through Unconventional Technologies: A Case Study on Rangely Oil Field, Colorado

Complex Approach to Stimulate Gas Formations Serves Eastern Siberia

High-Resolution and Multimaterial Fracture Productivity Calculator for the Successful Design of Channel Fracturing Jobs

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