The First Experience of Rod-Shaped Proppant Implementation in Western Siberia Oil Fields (Russian)

Valiullin, A. S.; Makienko, Vladimir; Overin, Alexander; Yudin, Alexey; Gromovenko, Alexander

doi:10.2118/176540-ru

Cited by 5 publications

(2 citation statements)

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“…Cylindrical proppant was added as 20-30% tail in of conventional fracturing designs to improve near-wellbore fracture conductivity and minimize additional cost of the fracturing operation. Details of that campaign were published by Valiullin et al, 2015. Results were encouraging yielding about 20% of incremental productivity and no proppant flowback issues.…”

Section: Rod-shaped Proppantmentioning

confidence: 96%

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Channel Fracturing Technique Helps to Revitalize Brown Fields in Langepas Area

Valiullin

Makienko

Yudin

et al. 2015

SPE Oil &Amp; Gas India Conference and Exhibition

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Paper describes in details a trial campaign with channel fracturing technique and it's positive effect on operational reliability and wells productivity that helped to revitalize brown Urevskoe oil field.Main challenges of the Jurassic formation are low permeability and high heterogeneity. Hydraulic fracturing is required for economic wells exploitation. Historically, hydraulic fracturing in oil fields close to the city of Langepas was developing towards aggressive designs with cleaner fractures, although increased risk of premature screenouts is encountered with such approach. To further improve efficiency and economics of stimulation treatments, a logical step in conductivity enhancement was made implementing channel fracturing technique. Channel fracturing allows for heterogeneous proppant placement leaving open channels inside proppant pack. Thus, conductivity of the system increases significantly. Channels also help to better clean out fracture from fluids and polymers increasing an effective fracture half-length, which is a goal in low-permeability formations. Another important advantage of the new technique is minimized risk of screenouts.Campaign was made implementing the technique to re-stimulate wells in brown Urevskoe oil field in Langepas area. Open channels showed reliable production increase from old wells in depleted regions. Proppant flowback is a common problem in such conditions and was encountered in many offset wells, therefore channel fracturing was enhanced by rod-shaped proppant at the tail-in stage. Such combination allowed preventing proppant flowback issues and improved conductivity in near-wellbore zone.Worldwide, this trial campaign is one of the pioneering re-stimulation projects implementing channel fracturing. Comprehensive analysis of performed operation, production comparative results and lessons learnt will make it possible to successfully extend the use of innovative technologies to many other brown fields that require stimulation.

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Section: Rod-shaped Proppantmentioning

confidence: 96%

“…The first trial attempt to combine channel fracturing technology with rod-shaped proppant was performed to further improve stimulation efficiency. Before that several successful treatments with rod-shaped proppant were pumped in Urevskoe oil field in 2013-2014 (Valiullin et al, 2015).…”

Section: Production Analysis Of the Pilot Campaignmentioning

confidence: 99%

Channel Fracturing Technique Helps to Revitalize Brown Fields in Langepas Area

Valiullin

Makienko

Yudin

et al. 2015

SPE Oil &Amp; Gas India Conference and Exhibition

Self Cite

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Recent progress on proppant laboratory testing method: Characterisation, conductivity, transportation, and erosivity

Ramlan

Zin

Bakar

et al. 2021

Journal of Petroleum Science and Engineering

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Mitigating Proppant Flowback through Surface Treatment of Proppant-Laboratory Studies and Field Performance

Lu¹,

O’Neil²,

Zhang³

et al. 2018

Day 3 Thu, October 18, 2018

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Post stimulation proppant flowback can be a serious problem after the hydraulic fracturing process and can cause a variety of issues like: reduced fracture propping resulting in decreased conductivity and hydrocarbon production;erosion related damage to surface and downhole equipment; and increased costs in dealing with recovered proppant disposal. To address the concerns related to proppant flowback, various technologies, including chemical, mechanical, and engineering design have been employed. A common and long term commercial approach is to apply a resin to the surface of the sand. However, resin coatings can be costly relative to the cost of the sand substrate, often doubling or tripling the cost of the sand substrate to which they are applied. Additionally, resin coated proppants often need to be activated with exposure to temperature and pressure. The requirement for additional chemical activators at lower reservoir temperatures can also add additional cost to the treatment. Furthermore, resin coated sands are typically manufactured near a sand mine and then shipped to remote well locations. This offers another layer of logistical complexity to bringing large volumes of sand to a site or often multiple types of sand and thus can add additional costs. In some cases, on-site or near-site manufacturing of resin coatings is possible, but again at an additional cost. A proppant flowback control measure which is cost-effective and can function over a wide range of reservoir conditions would be advantageous to the hydraulic fracturing process. A new technology for proppant flowback control was previously presented where chemically modifying the proppant surface with the proppant consolidation additive (PCA) can induce a strong capillary attraction among proppant grains leading to proppant agglomeration (Lu et al., 2016). This study serves to further examine this sand surface modifying chemical. Additional experimental results will focus on conductivity measurement of surface treated proppant and flow resistance tests of treated proppants relative to untreated proppants at varying conditions. The field performance of more than 50 wells in western Canada in terms of proppant flowback control using thisnewly developed technology will also be presented. A discussion of field application and results in several scenarios will demonstrate the correlation of the laboratory experimental results to actual field performance. Compared with untreated either Tier 1 or Tier 2 proppant, the surface treatment of proppant increases flow resistance under all the tested confining pressure, also, noticeable increase of proppant conductivity under high confining pressure was observed, which is an advantage of the surface treatment of proppants. The field performance data show that this newly developed technology gives similar or better results relative to resin coated proppants in terms of proppant flowback control. This technology demonstrates the following advantages: 1) it can be applicable to either Tier 1 or Tier 2 proppant; 2) it can be easily applied on-the-fly to sand during a fracturing operation, either as the tail in sand stage, alternating during the entire stage, or being sprayed on all the sand stage, which makes it flexible for operators to design proppant flowback control and to ease the logistics of managing proppant delivery to location as well; 3) it perfroms under a wide range of reservoir conditions because it is independent of reservoir pressures and temperatures.

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The First Experience of Rod-Shaped Proppant Implementation in Western Siberia Oil Fields (Russian)

Cited by 5 publications

References 1 publication

Channel Fracturing Technique Helps to Revitalize Brown Fields in Langepas Area

Channel Fracturing Technique Helps to Revitalize Brown Fields in Langepas Area

Recent progress on proppant laboratory testing method: Characterisation, conductivity, transportation, and erosivity

Mitigating Proppant Flowback through Surface Treatment of Proppant-Laboratory Studies and Field Performance

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