Advanced Multizone Stimulation Technology

Lonnes, Steve Bruce; Hall, Timothy; Nygaard, Kris; Sorem, William A.; Tolman, Randy C.

doi:10.2118/95778-ms

Cited by 19 publications

(4 citation statements)

References 1 publication

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“…Diversion between treated intervals is promoted through the deployment of ball sealers. 10 A well is stimulated using the JITP method by sequentially treating individual zones via the combination of selectively perforating single intervals and promoting the isolation of these intervals through the deployment of ball sealers. A single continuous pumping operation allows uninterrupted operations.…”

Section: Just-in-time Perforating Stimulation Technology (Jitp)mentioning

confidence: 99%

Improved Methods and Workflows for Multi-Zone Stimulation

et al. 2013

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Economic production from many low permeability unconventional reservoirs has been enabled by the ability to propagate multiple stimulation treatments per well and from multiple wellbores located on a single pad or platform. A variety of design procedures and mechanical means have been developed to create improved connections to the reservoir, reflecting ongoing innovation in improving stimulation effectiveness while enabling reliable treatment placement and completion cost reduction. Both modeling and interpretation tools have been developed to predict, assess, and optimize stimulation treatment design and placement.Successful multi-zone stimulation requires evaluation and selection of many options -ranging from rock property design assumptions to methods of zonal isolation and fluid diversion to the efficient use of water and equipment deployment. Hence it is essential to incorporate strategies to integrate multi-disciplinary technology, operational data, and economic optimization in the workflows to achieve the best results. These strategies also require the flexibility to adapt various existing and emerging technologies within the unconventional reservoirs and account for the local operating environment and conditions. This paper examines the fundamental elements driving multi-zone stimulation effectiveness based on integration of extensive field experience and research in reservoirs requiring multi-zone stimulation to unlock their economic potential. Tools and workflows will be illustrated that have improved multi-zone stimulation effectiveness, enabled significant operational efficiencies, and have led to enhanced well performance and resource recovery. TX 75083-3836, U.S.A., fax +1-972-952-9435Exxon Mobil Corporation has numerous subsidiaries, many with names that include ExxonMobil, Exxon, Esso and Mobil. For convenience and simplicity in this paper, the parent company and its subsidiaries may be referenced separately or collectively as "ExxonMobil." Abbreviated references describing global or regional operational organizations and global or regional business lines are also sometimes used for convenience and simplicity. Nothing in this presentation is intended to override the corporate separateness of these separate legal entities. Working relationships discussed in this presentation do not necessarily represent a reporting connection, but may reflect a functional guidance, stewardship, or service relationship.

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Section: Just-in-time Perforating Stimulation Technology (Jitp)mentioning

confidence: 99%

Improved Methods and Workflows for Multi-Zone Stimulation

et al. 2013

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“…As each fracturing treatment is completed, ball sealers are pumped to temporarily plug the open perforations. A single, continuous pumping operation allows uninterrupted process and positive pressure on the ball sealers to accomplish effective ball sealing (Lonnes et al 2005). To date, more than 35 wells have been stimulated with up to 350 stages per pad.…”

Section: Ball-sealer Processmentioning

confidence: 99%

Pinpoint Fracturing Technologies: A Review of Successful Evolution of Multistage Fracturing in the Last Decade

Stanojcic

Jaripatke

Sharma

2010

Proceedings of SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition

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As oil and gas reserves are declining, operators all over the world are now being forced to go to land areas with extreme conditions and deeper into the sea to find more reserves. The reservoirs are getting more complex and well designs are becoming more complicated and costly. The complex reservoirs and extreme conditions require several individual zones to be completed and fractured individually to access maximum reservoir and get the biggest return for the money. Oftentimes, each zone requires a specifically designed fracturing treatment to effectively treat it. A lot of money and time are lost each year when operators try to treat these multizones using conventional techniques. The optimum production rates are not achieved and the reservoir-recovery factor is low, leaving most of the oil and gas unrecovered.Because of the recent drop in oil and gas prices, cost, time, and production are the driving factors causing operators to look for alternate completion and fracturing methods to reduce cost and time without compromising production. Numerous techniques and hit-and-trial methods have been tried throughout the past decade to overcome this problem. Multistage fracturing has offered one of the best solutions to everyone in this tough economic environment. Throughout the past few years, there has been a growing acceptance among both operators and service companies that hydra jet (abrasive jetting) perforating can improve overall well economics for fracture-stimulated wells in many reservoirs. More and more customers all over the world are now using multistage fracturing to access the complex reservoirs and treat wells with complex completions. In a few cases, pinpoint stimulation has proven to be the only way that effective stimulation could be achieved. The pinpoint-stimulation portfolio has evolved throughout the past decade to offer several options to different well conditions and types. This paper presents a detailed review of many pinpoint-stimulation technologies that have been successfully used for treating multizones in complex reservoirs and extreme well conditions in the last decade, either in new wells or in mature fields, to improve the production and reservoir recovery factor. It provides insight to strategies of how these different technologies were applied to different well conditions. Case histories are provided to support the obtained benefits and advantages, and lessons learned are discussed along with recommendations and what to avoid in field operations. Future directions of pinpoint stimulation are also discussed.Multistage fracturing can be performed in different ways, depending on the well design and completions. More and more customers are now designing the well and selecting completions based on the multistage fracturing technique that best accesses the reservoir efficiently. The following multistage fracturing techniques are discussed in this paper:• CT applications.• Jointed-pipe applications.• Sleeve applications.• Perf-and-plug applications. Globally, pinpoint-stimulation treatments ...

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“…Coiled tubing is a long oil pipe wound by a coiling block for entering into and lifting in a well without a threaded connection, and it has been widely applied in drilling, well completion, well logging, oil-gas exploitation and well repair and similar fields, due to the prominent advantages of having a compact structure, convenience of operation, high efficiency, low cost, reservoir protection and increased production [1][2]. Nevertheless, there are still some issues during the operation of coiled tubing, such as the passing capacity of a ball for staged fracturing.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation for Ball Passing Capacity in Coiled Tubing

Zhang¹,

Zhang²,

Zhou³

et al. 2015

IJHT

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To prevent a ball becoming stuck in coiled tubing, it is critical to determine the flow velocity of fluid in a hydraulic drive ball-off. The computational fluid dynamics method and standard k-ε turbulence model were applied to simulate the flow within the tubing of a section of coiling block. By analyzing the flow around the ball, the force on the ball exerted by fluid was computed, and the movement trend of the ball at different locations obtained by steady simulation. With the dynamic grid technique, the movement of the ball was identified through transient simulation. The research showed that: the fluid force through static simulation is too large to be used for judging the ball's passing capacity in a section of coiling block. The ball moved around the coiling block with a minimum value of θ = 90°, revealing that the ball could easily reach the highest point if the minimal angular velocity of ball was greater than zero. Moreover, the conclusion that the ball could pass through the whole section of the coiling block if only it passed the first circle of the coil could be drawn. Furthermore, the critical flow velocity for different sized ball to pass through the coiled tubing increased monotonically with the increase in the ball diameter, and exhibited an approximate quadratic relation. When the curvature radius of the coiling block was 1.268 m and the diameter of the solid steel ball was in the range of (30 mm, 50 mm), the critical flow velocity was (2.30 m/s, 2.415 m/s). This study provides a useful basis for experiment design.

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Advanced Multizone Stimulation Technology

Cited by 19 publications

References 1 publication

Improved Methods and Workflows for Multi-Zone Stimulation

Improved Methods and Workflows for Multi-Zone Stimulation

Pinpoint Fracturing Technologies: A Review of Successful Evolution of Multistage Fracturing in the Last Decade

Numerical Simulation for Ball Passing Capacity in Coiled Tubing

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