Comprehensive Model for Flow Behavior of High-Performance-Fracture Completions

Zhang, Yanbin; Marongiu-Porcu, Matteo; Ehlig-Economides, Christine; Tosic, Slavko; Economides, Michael J.

doi:10.2118/124431-pa

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…The reason the fracture flow fractions are much lower than seen in the previously published sensitivity study (Zhang et al, 2009) is that the values of proppant pack permeability (and thus, fracture conductivity) were about 4 times higher in that study. The reason the fracture flow fractions are much lower than seen in the previously published sensitivity study (Zhang et al, 2009) is that the values of proppant pack permeability (and thus, fracture conductivity) were about 4 times higher in that study.…”

Section: Field Data Analysiscontrasting

confidence: 69%

“…reproduced fromZhang et al (2009), shows several important results for a 200-md oil well case study to keep in mind throughout our field data analysis in the next sections. The trends illustrated are for total skin and fracture flow…”

mentioning

confidence: 90%

“…The HPF model developed by Zhang et al (2009) provides a versatile tool for modeling high rate wells with HPF (frac-pack) completions. The model features a geometric determination of the connection between the wellbore and the fracture plane and permits flow both through the fracture and directly to the remaining perforations not connected to the fracture (referred as "by-pass") as shown in Figure 1(b).…”

Section: Introductionmentioning

confidence: 99%

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Field Data Validation of a General Model for High-Performance Fractures in Deviated High-Rate Wells

Porcu

Naha

Norman

et al. 2010

SPE Annual Technical Conference and Exhibition

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The use of deviated trajectories in deepwater completions is legitimately advocated by drilling constraints, but unfortunately production considerations have not been given the attention they deserve. A recently developed comprehensive semianalytical model using distributed volumetric sources offers a flexible and powerful computational tool that enables rigorous evaluation of a wide variety of possible flow patterns, including augmented wellbores due to "halo effects", combined flow towards the fracture and towards the remaining flowing perforations not connected to the fracture, turbulent flow effects and possible different levels of damage within the fracture and gravel pack regions.While the generalized high-performance fracture (HPF) model clearly indicates the well performance penalty for hydraulically fracturing a deviated well, for many operators the main reason for the hydraulic fracture is sand control. The high-performance fracturing (frac-pack) completion has proven to last for a significantly longer time and through much greater cumulative production than conventional (non-fractured) cased hole gravel pack (GP) completions. A key reason for the success in deviated wells may be that even though much of the flow to the well may bypass the hydraulic fracture, as long as flow to the well is mostly uniform, the potential for failure is low.This paper provides a broad based validation of the model using field data from a key deepwater region. Production and pressure transient data, and open and cased hole logs are used to evaluate the most likely flow geometry for each field case, and the results are compared to HPF model output. This provides a global assessment of the model versatility in modeling the production behavior of actual wells. In turn, this enables use of the model to benchmark the performance of any given well to what it could have had with more nearly optimal drilling and completion practices.

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Section: Field Data Analysiscontrasting

confidence: 69%

mentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Field Data Validation of a General Model for High-Performance Fractures in Deviated High-Rate Wells

Porcu

Naha

Norman

et al. 2010

SPE Annual Technical Conference and Exhibition

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“…For the generalized Forchheimer equations this result was obtained in [15,19] and is recently used by the reservoir engineers in their research [20]. However, for arbitrary initial data one cannot expect the pseudo-steady state pressure distribution and the constant in time diffusive capacity.…”

Section: Introductionmentioning

confidence: 88%

Time asymptotics of non-darcy flows controlled by total flux on the boundary

2012

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We study the long term asymptotics of the diffusive capacity, the integral characteristic of a domain with respect to a nonlinear Forchheimer flow in porous media. Conditions on the boundary are given in terms of the total flux and constraints on the pressure trace on the boundary. We prove that, if the total flux is stabilizing, then the difference between the pressure average inside the domain and the pressure average on the boundary is stabilizing as well. This result can be used for calculating the productivity index of the well, an important characteristic of the well performance. To obtain the main theorem, a refined comparison of the fully transient pressure with the pseudo-steady state pressure (the time derivative of pressure is constant) was performed. These results can be effectively used in reservoir engineering and can also be applied to other problems modeled by nonlinear diffusive equations. Bibliography: 26 titles.

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“…若油藏条件和压裂用支撑剂数量已知, 则可以用统一压裂设计方法 (unified fracture design, UFD)求出使油井产能指数最大的裂缝参数 [20~27] . 为了实现人工裂缝增产和防砂的双重目的, 本文引用了裂缝流比重的概念 [28,29] 来表征油藏与填充裂缝之间的液体传递关系, 通过建立压裂井数值模型模拟长期生产数据, 以最大裂缝流比重为目标提出了改进的 UFD 裂缝参数优化新方法, 为疏松砂岩稠油油藏实施压裂防砂措施提供了技术支持.…”

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