Improving Hydrocarbon Recovery in Sliding Sleeve Completions Utilizing Diverters in the Wattenberg Field

Fry, Jessica; Roach, Erik; Kreyche, Brett; Yenne, Travis; Geoffrey, Gullickson; Jespersen, Matt

doi:10.2118/179167-ms

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…Temporary plugging agents are made from degradable polymers, typically polylactic acid (PLA), which can degrade at the reservoir temperature and leave no residue [ 38 ]. All reported field applications with this type of diverter are in reservoirs less than 100 °C, and only used for plugging the perforation holes during the refracturing [ 39 , 40 , 41 ]. Zhou et al [ 42 ] investigated the filtration characteristic of temporary plugging and the length of filter cake under the condition of different fracture widths.…”

Section: Introductionmentioning

confidence: 99%

A New Compound Staged Gelling Acid Fracturing Method for Ultra-Deep Horizontal Wells

Wang¹,

Fan²,

Wang

et al. 2022

Gels

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Carbonate gas reservoirs in Sichuan are deeply buried, high temperature and strong heterogeneity. Staged acid fracturing is an effective means to improve production. Staged acidizing fracturing of ultra-deep horizontal wells faces the following problems: 1. Strong reservoir heterogeneity leads to the difficulty of fine segmentation; 2. The horizontal well section is long and running too many packers increases the completion risk; 3. Under high temperatures, the reaction speed between acid and rock is rapid and the acid action distance is short; and 4. The fracture conductivity is low under high-closure stress. In view of the above problems, the optimal fracture spacing is determined through productivity simulation. The composite temporary plugging of fibers and particles can increase the plugging layer pressure to 17.9 MPa, which can meet the requirements of the staged acid fracturing of horizontal wells. Through the gelling acid finger characteristic simulation and conductivity test, it is clear that the crosslinked authigenic acid and gelling acid in the Sichuan carbonate gas reservoir are injected alternately in three stages. When the proportion of gelling acid injected into a single section is 75% and the acid strength is 1.6 m3/m, the length and conductivity of acid corrosion fracture are the best. A total of 12 staged acid fracturing horizontal wells have been completed in the Sichuan carbonate gas reservoir, and the production is 2.1 times that of ordinary acid fracturing horizontal wells.

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Section: Introductionmentioning

confidence: 99%

A New Compound Staged Gelling Acid Fracturing Method for Ultra-Deep Horizontal Wells

Wang¹,

Fan²,

Wang

et al. 2022

Gels

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The Impact of Petrophysical and Completion Parameters on Production in the Denver-Julesburg Basin

Miller

Payne²,

Melcher³

et al. 2016

SPE Low Perm Symposium

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The Denver-Julesburg (DJ) Basin has seen oil and gas production for more than a century. It is going through a new cycle of development with horizontal drilling and high-intensity hydraulic fracturing. Since the first horizontal wells in 2008 nearly 4,000 Niobrara and Codell horizontals have been drilled. While completion practices have remained fairly standard across the basin, production results vary wildly. We utilized a high-quality digital log dataset to accurately characterize reservoir quality in the Niobrara and Codell formations in the DJ Basin. The final dataset included 562 digital logs spread across the current extent of horizontal drilling in the DJ Basin. A petrophysical workflow was developed and detailed mapping of the reservoir attributes was completed. The log derived parameters, along with an aeromagnetic and vitrinite reflectance dataset, provided excellent insight into which geologic parameters could be best tied to well production response. Through bivariate and multivariate analyses using reservoir and completion data, and an economic evaluation to determine the "best bang for your buck", we have identified several completion changes for the basin that result in a significant reduction in the cost per bbl of oil produced. While geological parameters have been found to matter greatly for the production success of DJ horizontals, completions matter as well. The high GOR areas of Inner Core Wattenberg benefit most from jobs with more proppant, whereas areas with poorer reservoir quality generally benefit from higher stage intensity and jobs with larger fluid volumes. All suggested completion changes have a major impact on lowering $/boe over the long term and result in lowering incremental cost per incremental boe within a period of only 365 producing days in the current low oil price environment.

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Multistage Refracture in a Horizontal Well Using Flow-Diverting Technology

et al. 2016

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Summary Development of hard-to-recover reserves in Russia necessitates the development of new technologies and use of those technologies for efficient production of hydrocarbons. One such technology is multistage fracturing in horizontal wells. Beginning in 2010, such technologies have been widely used in many regions. A liner with swellable or hydraulic packers for separation of intervals and fracture ports opened with balls or actuated with the help of coiled tubing is the simplest and most economically effective method for completion of horizontal sections of boreholes. Well production using multistage fracturing helps maximize initial flow rates and hydrocarbon extraction; however, production declines over time can be significant and, in some cases, it is necessary to perform repeated reservoir stimulation treatments to maintain an economic production level. Refracturing wells with shifting sleeves is complicated because it is necessary to perform selective interval isolation for the target interval treatment. Mechanical isolation involves special tools for well treatment and fracturing, which significantly increases the cost and duration of treatment. Multistage fracturing fluid diversion, with the help of biodegradable diverting agents, is widely used in unconventional reservoirs but has not been used effectively in reservoirs with relatively high permeability. The method discussed in this work is based on injection of a degradable diverting agent, sealing of highly permeable intervals, recovery of permeability of existing fractures, and formation of new hydraulic fractures. This technology does not require any special tools and substantially reduces treatment time. However, such specific technology requires adjustment and calibration to particular formation conditions and completion types. This paper describes the flow diversion multistage refracturing technology tested at Las-Eganskoye field. The technology was tested in formations with relatively high permeability. Results of well treatment and testing allowed for assessing key process procedures and developing measures aimed at adjusting the method to field conditions.

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Improving Hydrocarbon Recovery in Sliding Sleeve Completions Utilizing Diverters in the Wattenberg Field

Cited by 9 publications

References 5 publications

A New Compound Staged Gelling Acid Fracturing Method for Ultra-Deep Horizontal Wells

A New Compound Staged Gelling Acid Fracturing Method for Ultra-Deep Horizontal Wells

The Impact of Petrophysical and Completion Parameters on Production in the Denver-Julesburg Basin

Multistage Refracture in a Horizontal Well Using Flow-Diverting Technology

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