Optimization of Multiple-Fractured Horizontal Tight Gas Well

Bagherian, Behzad; Ghalambor, Ali; Sarmadivaleh, Mohammad; Rasouli, Vamegh; Nabipour, Amin; Eshkaftaki, Mahdi Mahmoudi

doi:10.2118/127899-ms

Cited by 26 publications

(8 citation statements)

References 15 publications

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“…The more fractures that can be placed along the wellbore, the higher production rate will be. As discussed before Bagherian et al, 2010), there may be a maximum number of fractures, and above that number, more fractures will not bring more benefit to the well production. …”

Section: Resultsmentioning

confidence: 97%

Modeling Well Performance for Fractured Horizontal Gas Wells

Lin¹,

Zhu²

2010

Proceedings of International Oil and Gas Conference and Exhibition in China

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In tight gas reservoirs, horizontal wells have been used to increase reservoir contact and hydraulic fracturing has been applied to further extend the contact of the reservoir. Point source solution has been used to describe the flow behavior. The method was advanced to the volumetric sources, and pressure change inside the source was considered. We have developed a method that can predict horizontal well performance, and the model can also be applied for fractured horizontal wells. The method solves the problem by superposing a series of slab sources under transient or pseudo-steady state flow conditions. The principle of the method comprises calculation of the semi-analytical response of a rectilinear reservoir with closed outer boundaries. The slab source approach assigns the source a geometry dimension, similar to the volumetric source method, but has the solution similar to the point source method by neglecting the effect of the flow inside the source. When solving the source problem the pressure/flow effect inside source is considered sequentially by superposition principle over multiple sources.The pressure response is integrated over time to provide continuous pressure behavior. Flow effect inside of fractures can be studied by dividing the fracture into several segments, and each can be treated as a slab source. The method is validated by comparison with the results of analytical solutions of horizontal wells with uniform flux and infinite conductivity, and fractured wells with uniform flux, finite or infinite conductivity. The method provides an effective tool for horizontal well design and well stimulation design for gas reservoirs.In this paper, we present the details of model development. The examples will be used to illustrate how the model can help to optimize wellbore and fracture design. The method in this paper is more accurate compared with conventional point-source solution, and can handle the transaction from transient flow to pseudo-steady state flow smoothly. The results of the study show that in low permeability formation, hydraulic fracturing has more impact on horizontal well performance.

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Section: Resultsmentioning

confidence: 97%

Modeling Well Performance for Fractured Horizontal Gas Wells

Lin¹,

Zhu²

2010

Proceedings of International Oil and Gas Conference and Exhibition in China

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“…Too few fracs will not effectively drain the reservoir in a timely manner and too many fracs will waste capital while not delivering incremental rate or reserves. A recent study [Bagherian (2010)] recommended using numerical simulation and plots of cumulative gas recovered versus time to determine the optimum number of fracs. Bagherian states, "that for each specific reservoir an optimization study is required and there is no unique solution for all types of reservoirs."…”

Section: Completion Optimizationmentioning

confidence: 99%

Texas Panhandle Granite Wash Formation: Horizontal Development Solutions

Rothkopf¹,

Christiansen²,

Godwin³

et al. 2011

SPE Annual Technical Conference and Exhibition

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The Granite Wash formation in the Texas Panhandle is an active horizontal drilling trend where high initial gas rates combined with rich condensate yields create a rewarding investment opportunity for operators. The Granite Wash formation has been a drilling target for over 30 years but development accelerated rapidly after November 2004 when 20-acre downspacing was approved in the Buffalo Wallow field. In the years 2004-2008, vertical infill development was actively pursued with operators using an "assembly line" methodology that concentrated on cost reduction to achieve economic success. When soft gas prices made vertical wells economically challenging, operators turned to horizontal wells to improve the trend's economics. Previous papers [Edwards (2010), Ingram (2006)] have explored optimizing completion technology in the Granite Wash so this paper's objective is to find solutions to questions about initial production, rate decline, and liquid yields by examining the reservoir and fluid properties. The paper uses techniques developed for generalized tight gas sand reservoirs and applies Granite Wash formation data to create focused solutions. The data presented show the horizontal wells' high initial rates can be correlated to the offset vertical well performance and the initial production declines are defined by linear flow. In addition, a technique for optimizing the number of completion stages is presented and the condensate yields are explained using an Equation of State (EoS).

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“…For the optimum design of horizontal well and hydraulic fracture, Bagherian et al 11 analyzed various sensitivities of parameters of the horizontal well coupled with the assessment of economic. As they put it, the optimization was critical and necessary to each specific reservoir, and uniform solution of all kinds of reservoirs was impossible.…”

Section: Introductionmentioning

confidence: 99%

A Fractal Analysis for Net Present Value of Multi-Stage Hydraulic Fractured Horizontal Well

Zhang

Tan

et al. 2017

Fractals

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Because of the low permeability, multi-stage hydraulic fractured horizontal wells (MHFHWs) occupy a dominant position among production wells in tight gas reservoir. However, net present value (NPV) estimation method for MHFHW in tight gas reservoirs often ignores the effect of heterogeneity in microscopic pore structure. Apart from that, a new fractal model is presented for NPV of MHFHW, based on the fractal expressions of formation parameters. First, with the aid of apparent permeability model, a pseudo pressure expression considering both reservoir fractal features and slippage effect is derived, contributing to establish the productivity model. Secondly, economic assessment method is built based on the fractal productivity model, in order to obtain the NPV of MHFHW. Thirdly, the type curves are illustrated and the influences of different fractal parameters are discussed. The pore fractal dimensions D f and the capillary tortuosity fractal dimensions D T have significant effects on the NPV of an MHFHW. Finally, the proposed model in this paper provides a new methodology for analyzing and predicting the NPV of an MHFHW and may be conducive to a better understanding of the optimal design of MHFHW.

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Optimization of Multiple-Fractured Horizontal Tight Gas Well

Cited by 26 publications

References 15 publications

Modeling Well Performance for Fractured Horizontal Gas Wells

Modeling Well Performance for Fractured Horizontal Gas Wells

Texas Panhandle Granite Wash Formation: Horizontal Development Solutions

A Fractal Analysis for Net Present Value of Multi-Stage Hydraulic Fractured Horizontal Well

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