Benchmarking of Various Types of Completions and MS Technologies for Horizontal Wells at the Priobskoe Field Southern License Topic (Russian)

The South-Priobskoe Field is one of the largest oil pools in Western Siberia, with a unique category of reserves. Due to the low filtration properties of the productive formations AS10-AS12 (permeability of which is not more than 3 mD), the drilling of horizontal wells with subsequent multi-stage hydraulic fracturing (MSHF) completion is the most cost-effective way in this case. The use of highly viscous fracture fluids (at least 400 cP at 100 s-1) and 16/20 mesh proppant with a maximum concentration of 800-900 kg/m3 and the slurry rates are not exceeding 4.0 m3/min, became a kind of standard during the MSHF. However, a steady decline of permeability in the newly drilled areas of the field is observed (below 0.5 mD), because of this, an effective half-length of cracks begins to make an increasing contribution to oil production. This paper describes the introduction of non-standard methods of hydraulic fracturing for a traditional reservoir, and an idea was the use of low-viscous fluids with increased slurry rates, which resulted in an increase in well production rates by an average of 7%.

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High Rate Hybrid Fracturing in South-Priobskoe Field

Vikhman

Barinov

Kolupaev

et al. 2019

Day 2 Wed, October 23, 2019

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Cold Channel Fracturing: Synthesis of Fracturing Technologies in South Priobskoe Oilfield

Mavletkulov

Vernigora

Valnev

et al. 2020

Day 2 Wed, September 23, 2020

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The Southern licensed site of Priobskoe Oilfield (South-Priobskoe Oilfield, hereinafter SPRB) is the largest object of Gazprom Neft-Khantos. For the development of low-permeability productive formations AS10-AS12 it is economically feasible to drill horizontal wells (HW) with subsequent multistage hydraulic fracturing (MSHF). Growth of horizontal wells number raises the question of the implementation of different resource-saving technologies, including technologies to speed up the processes related to the preparation of water for hydraulic fracturing. It is also worth considering that in the case of horizontal wells drilled in areas with complex geological structure, which include a part of SPRB, еthere are higher risks to have a premature screen-out during MSHF and accordingly increased cost and time required to complete the well. Fracturing operation utilizing water with temperature equal 10-15°C water – cold water concept vs. standard 25-30°C allows to substantially optimize fracturing preparation steps and improve operational efficiency, which ultimately is expressed in accelerated time to put the well on production. Also, decreased operating time of water heaters leads to a reduction of environmental footprint and air emissions. Channel fracturing technology with pulsed proppant placement, forming highly conductive channels in the fracture, allows to reduce the proppant mass and the volume of hydraulic fracturing fluid while maintaining the target fracture half-length. Combination of cold water concept with channel fracturing technology demonstrated significant acceleration of multistage hydraulic fracturing operation cycle for horizontal wells at the SPRB.

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Cold Channel Fracturing: Synthesis of Fracturing Technologies in South Priobskoe Oilfield (Russian)

Mavletkulov¹,

Vernigora²,

Valnev³

et al. 2020

SPE Symposium: Hydraulic Fracturing in Russia. Experience and Prospects

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Benchmarking of Various Types of Completions and MS Technologies for Horizontal Wells at the Priobskoe Field Southern License Topic (Russian)

Cited by 5 publications

References 1 publication

High Rate Hybrid Fracturing in South-Priobskoe Field

High Rate Hybrid Fracturing in South-Priobskoe Field

Cold Channel Fracturing: Synthesis of Fracturing Technologies in South Priobskoe Oilfield

Cold Channel Fracturing: Synthesis of Fracturing Technologies in South Priobskoe Oilfield (Russian)

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