Vertical Minihole Creation and Fracturing Technology for Completing Unconventional Wells

Surjaatmadja, Jim Basuki; Abass, Hazim

doi:10.2118/192073-ms

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…This configuration allows the fracture originating from the mini hole to align itself perfectly with the maximum horizontal stress and be perpendicular to the minimum horizontal stress. This configuration minimizes both near-wellbore friction and perforation friction as presented by Abass et al [39] and Surjaatmadja [40].…”

Section: Design Modification Proceduresmentioning

confidence: 82%

Screenout Detection and Avoidance

V. Massaras

2024

Contemporary Developments in Hydraulic Fracturing

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A screenout (SO) event is defined as premature termination of a propped hydraulic fracture (PHF) treatment due to bridging of the proppant at a restriction, usually located at the near-wellbore area or at the perforations—and not at the perimeter tip of the fracture. Numerous Screenout Detection (SD) methodologies have been presented over the past 60 years which are designed to predict the likelihood of a SO event based on analysis of minifrac data, or real-time data—during the mainfrac. Three simple SD and numerous screenout avoidance (SA) methods are presented. The SD methods are: enhanced fracture entry friction (FEF) analysis, median ratio (MR) and inverse slope (IS). Analyses with the first two methods require data from a step-down test (SDT), while the third method uses data which are analyzed in real-time during the mainfrac. By knowing the potential for a SO event or by having advance warning of the onset of a SO event, one is able to apply design modifications for the mainfrac, or is able to initiate abrupt, or incremental step displacement (flush) and achieve SA, or to extend the PHF treatment to improve placement by attaining increased net-pressure gain. The theory and logic of the SDT and of the three methods includes discussion on: the balloon analogy, stagnation pressure, fracture toughness and fracture tip dilatancy. Both the MR and the IS methods do not require a computer or software and all three methods are very easy to use at the well location by the on-site engineer. All three methods are very inexpensive. Numerous publications have dealt with SA over the past 70 years, and have presented design modification procedures, and wellbore intervention procedures, which are presented briefly. These procedures when implemented individually, or in combination, have proven to be very useful in: Preventing SO events, achieving positive SA outcomes, by enabling the safe and effective placement of PHF treatments.

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Section: Design Modification Proceduresmentioning

confidence: 82%

Screenout Detection and Avoidance

V. Massaras

2024

Contemporary Developments in Hydraulic Fracturing

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An Investigation into Boosting Pressure in the Cavity while Hydra-Jet-Assisted Fracturing: An Improved Model with Insightful Sensitivity Analysis

et al. 2021

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Hydrajet-Based Fracturing Treatment in Unconventional Wells

Surjaatmadja

2019

Day 3 Wed, March 20, 2019

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The success of resource shale development has drawn much attention to develop new technologies to economize the extensive fracturing treatments required to make commercial wells. While a single planar hydraulic fracture is the objective in conventional wells, generating a complex fracturing network is commonly the goal when fracturing unconventional wells. Therefore, in shale formations, it is required to establish connectivity to natural fractures and beddings to generate large Stimulated Reservoir Volume (SRV). Two main staged fracturing techniques have been implemented to complete horizontal wells drilled in the challenging unconventional reservoirs: plug-and-perf and sliding sleeves. This paper presents a technique for effective fracture stimulation, including hydrajetting for fracture initiation, then continuous injection for fracture propagation. Hydrajetting is used to place singular or dual miniholes of approximately 2-in. ID and 2 ft penetration depth to bypass the near wellbore stress field and focus the energy on generating SRV at a distance away from the disturbed near wellbore stress field (due to drilling effects). The procedure involves two steps: hydrajetting at a given depth using coiled tubing equipped with a gravity-oriented jetting tool, and then fracturing by pumping through both the annulus and the jetting tool. Large miniholes offer minimizing the energy loss created by conventional perforations, avoiding tortuous path generation, minimizing possibilities for near wellbore screen-out, and generating complex fracture networks. This paper discusses the unique mechanics of the new procedure aimed at creating large SRV in shale formations. The new technique is fairly easy to implement and the beneficial impact could be substantial. The technique and resulting benefits in fracture stimulation of shale reservoirs will be presented.

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Vertical Minihole Creation and Fracturing Technology for Completing Unconventional Wells

Cited by 3 publications

References 22 publications

Screenout Detection and Avoidance

Screenout Detection and Avoidance

An Investigation into Boosting Pressure in the Cavity while Hydra-Jet-Assisted Fracturing: An Improved Model with Insightful Sensitivity Analysis

Hydrajet-Based Fracturing Treatment in Unconventional Wells

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