Analysis of Multiple Fractured Horizontal Wells Application at Priobskoye field

Afanasyev, I. S.; Тимонов, А В; Sudeev, Igor; Musabirov, Timur; Степанов, М. А.; Kolonskikh, A.V.; Galeev, Rail

doi:10.2118/162031-ms

All Days 2012

DOI: 10.2118/162031-ms

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Analysis of Multiple Fractured Horizontal Wells Application at Priobskoye field

I. S. Afanasyev

А В Тимонов

Igor Sudeev

et al.

Abstract: Analysis of opportunity of multiple fractured horizontal wells application in low-permeability zones of Priobskoye oil field is considered. Geological and engineering issues of area selection for horizontal wells drilling and features of multi-staged fracturing design are discussed. Brief description of completion technology applied is observed. Comparison between fractured horizontal wells and fractured vertical wells performance based on detailed flow simulation is presented.

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Cited by 7 publications

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Successful Coiled-Tubing Application for Milling, Cleanout, and Kickoff Operations of Horizontal Wells Completed with Liner for Multistage Hydraulic Fracturing Project on Priobskoe Oil Field

et al. 2013

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Historically, coiled tubing (CT) services were positioned as highly tailored services in Russian Federation. Main operations for CT application were post-frac cleanouts (CO) and kick-off (KO) of vertical and slightly deviated wells. Lately, with increasing of horizontal wells quantity, CT application scope became wider: logging, perforating, fishing jobs, CO, milling and other operations. With increasing interest to multi-stage hydraulic fracturing technology, Coiled Tubing application has to grow to meet client demands. In wells with horizontal section 1000 m long, milling of different sizes balls and seats became the most challenging and efficient technical solution. Located in Khanty-Mansiysk District of Western Siberia, Priobskoe field is one of the world’s largest oilfields. Due to low permeability almost 80% of reserves are hardly recoverable. Oilfield development plan include post drill fracturing of all new completed wells. In order to maximize the hydrocarbon recovery field-proven technology enabling multi-stage hydraulic fracturing of an uncemented completion in one pumping treatment became a consistent decision for well treatment. For the first job following workflow was applied: multi-stage hydraulic fracturing completion was installed and 7 zones were fractured one by one. Technology implies that during pumping, at specified stage time, balls are dropped (one at time) from the surface to open the Frac Ports (FP). After the treatment, the most efficient technical solution to remove the balls is to mill them using CT. Following milling operations the well was cleaned out and kicked off with nitrogen. In designing a Coiled Tubing job the critical part is BHA and string selection. Selected mill should be strong enough for milling Frac Port iron and long enough to prevent damage of FP, by side tracking from it to reservoir. As per project program 4 wells have been completed with technology described above. Current production rates show high efficiency of multi-stage hydraulic fracturing technology over traditional well completions. This article describes technical and operational details of the project, candidate selection process, job planning and determines a way to find an optimum technique to meet client demands. Analysis of 4 wells completed with multi-stage fracturing liner is shown in comparison with standard completion in the article.

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Successful Coiled-Tubing Application for Milling, Cleanout, and Kickoff Operations of Horizontal Wells Completed with Liner for Multistage Hydraulic Fracturing Project on Priobskoe Oil Field

et al. 2013

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Use of Channel Fracturing Technology Increases Production and Reduces Risks in Horizontal Wellbore Completions - First Experience in Russia, South-Priobskoe Oil Field

et al. 2014

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South-Priobskoe field is in process of active development for over 10 years at the moment. Main producing horizons are low-permeable sandstone formations AS10-AS12 of Neocomian age. Hydraulic fracturing in the vertical wells proved to be effective way to increase oil production and provided profitable development of the oil field for several years period. Many wells had commingled production from 2 or 3 layers; each of the layers was stimulated separately. However, recent shift of drilling and development activity towards edge areas of the field led to reduction in formation quality and seldom well intersects more than one productive interval nowadays.Most effective way for such geological conditions is combination of horizontal well drilling development and multi-stage fracturing. This concept was successful applied worldwide for number of years and recently fulfill expectation at South Priobskoe field in Russia as well. Enhancement of oil production jointly with drainage scheme optimization allowed to decrease amount of wells and associated costs for infrastructure and well completion. Main weaknesses of this approach are increased screenout risks during fracturing operation and additional costs for horizontal wellbore cleanout in such a case.Implementation of channel fracturing technology became the next step of production optimization and well completion cost reduction. New method allows increasing reliability of proppant placement while improving fracture conductivity. These results are obtained by pulsing proppant on surface in conjunction with specialized equipment and fibers. New technology was implemented in 110 vertical wells over Russia including positive experience of channel fracturing campaign in 3 wells in South-Priobskoe field.This article describes Russia's first project of multistage stimulation (MSS) combined with channel fracturing technique applied in horizontal well. New approach allowed minimizing screenout risk, reducing completions costs and at the same time improving conductivity of hydraulic fractures. First production results showed increase in well productivity of over 15% compared to the neighboring horizontal wells stimulated by conventional MSS technique.

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Horizontal Drilling with Multi-Stage Fracturing - Access to Challenged Reserves of Tyumen Formation, Krasnoleninskoye Field

Nemirovich¹,

Islamgaliev

2014

All Days

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Summary This paper describes the main issues and challenges complicated the full-field development of the Jurassic deposits of the Tyumen Formation (JK2-9), Krasnoleninskoye Field. The paper summarizes the conclusions of actual wells operation, as well as substantiates the development strategy for heterogeneous low-permeable reservoirs. The results obtained were used as a base for HW+MSF technology piloting on Em-Egovskaya area, the most promising area in terms of reserves of the Tyumen Formation, Krasnoleninskoye field. At the time of paper generation, the pilot project moved to the next stage – rolling-out of engineering solutions on contingent areas (drilling of additional well clusters). However, the main focus of this paper is placed on the first stage of the pilot project including development strategy definition.

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Analysis of Multiple Fractured Horizontal Wells Application at Priobskoye field

Cited by 7 publications

References 1 publication

Successful Coiled-Tubing Application for Milling, Cleanout, and Kickoff Operations of Horizontal Wells Completed with Liner for Multistage Hydraulic Fracturing Project on Priobskoe Oil Field

Successful Coiled-Tubing Application for Milling, Cleanout, and Kickoff Operations of Horizontal Wells Completed with Liner for Multistage Hydraulic Fracturing Project on Priobskoe Oil Field

Use of Channel Fracturing Technology Increases Production and Reduces Risks in Horizontal Wellbore Completions - First Experience in Russia, South-Priobskoe Oil Field

Horizontal Drilling with Multi-Stage Fracturing - Access to Challenged Reserves of Tyumen Formation, Krasnoleninskoye Field

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