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You searched for +publisher:"Texas A&M University" +contributor:("Ehlig-Economics, Christine"). Showing records 1 – 3 of 3 total matches.

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1. Fan, Diangeng. The Method of Distributed Volumetric Sources for Forecasting the Transient and Pseudo-steady State Productivity of Multiple Transverse Fractures Intersected by a Horizontal Well.

Degree: MS, Petroleum Engineering, 2011, Texas A&M University

This work of well performance modeling is focused on solving problems of transient and pseudo-steady state fluid flow in a rectilinear closed boundaries reservoir. This model has been applied to predict and to optimize gas production from a horizontal well intercepted by multiple transverse fractures in a bounded reservoir, and it also provides well-testing solutions. The well performance model is designed to provide enhanced efficiency with the same reliability for pressure transient analysis, and well performance prediction, especially in complex well fracture configuration. The principle is to simplify the calculation of the pressure response to an instantaneous withdraw, which happens in other fractures, within a shorter computational time. This pressure response is substituted with the interaction between the two whole fractures. This method is validated through comparison to results of rigorous Distributed Volumetric Sources (DVS) method in simple symmetric fracture configuration, and to results of field production data for complex well/fracture configuration of a tight gas reservoir. The results show a good agreement in both ways. This model indicates the capability to handle the situations, such as: various well drainages, asymmetry of the fracture wings, and curved horizontal well. The advantage of this well performance model is to provide faster processing - reducing the computational time as the number of fractures increase. Also, this approach is able to be applied as an optimization and screening tool to obtain the best fracture configurations for reservoir development of economically marginal fields, in terms of the number and dimensions of fractures per well, also with external economic and operational constraints. Advisors/Committee Members: Valko, Peter (advisor), Ehlig-Economics, Christine (committee member), Pope, Christopher (committee member).

Subjects/Keywords: Transient and Pseudo-steady state; Horizontal well; fracture

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Fan, D. (2011). The Method of Distributed Volumetric Sources for Forecasting the Transient and Pseudo-steady State Productivity of Multiple Transverse Fractures Intersected by a Horizontal Well. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8938

Chicago Manual of Style (16th Edition):

Fan, Diangeng. “The Method of Distributed Volumetric Sources for Forecasting the Transient and Pseudo-steady State Productivity of Multiple Transverse Fractures Intersected by a Horizontal Well.” 2011. Masters Thesis, Texas A&M University. Accessed November 28, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8938.

MLA Handbook (7th Edition):

Fan, Diangeng. “The Method of Distributed Volumetric Sources for Forecasting the Transient and Pseudo-steady State Productivity of Multiple Transverse Fractures Intersected by a Horizontal Well.” 2011. Web. 28 Nov 2020.

Vancouver:

Fan D. The Method of Distributed Volumetric Sources for Forecasting the Transient and Pseudo-steady State Productivity of Multiple Transverse Fractures Intersected by a Horizontal Well. [Internet] [Masters thesis]. Texas A&M University; 2011. [cited 2020 Nov 28]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8938.

Council of Science Editors:

Fan D. The Method of Distributed Volumetric Sources for Forecasting the Transient and Pseudo-steady State Productivity of Multiple Transverse Fractures Intersected by a Horizontal Well. [Masters Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8938

2. Song, Bo. Pressure Transient Analysis and Production Analysis for New Albany Shale Gas Wells.

Degree: MS, Petroleum Engineering, 2010, Texas A&M University

Shale gas has become increasingly important to United States energy supply. During recent decades, the mechanisms of shale gas storage and transport were gradually recognized. Gas desorption was also realized and quantitatively described. Models and approaches special for estimating rate decline and recovery of shale gas wells were developed. As the strategy of the horizontal well with multiple transverse fractures (MTFHW) was discovered and its significance to economic shale gas production was understood, rate decline and pressure transient analysis models for this type of well were developed to reveal the well behavior. In this thesis, we considered a “Triple-porosity/Dual-permeability” model and performed sensitivity studies to understand long term pressure drawdown behavior of MTFHWs. A key observation from this study is that the early linear flow regime before interfracture interference gives a relationship between summed fracture half-length and permeability, from which we can estimate either when the other is known. We studied the impact of gas desorption on the time when the pressure perturbation caused by production from adjacent transference fractures (fracture interference time) and programmed an empirical method to calculate a time shift that can be used to qualify the gas desorption impact on long term production behavior. We focused on the field case Well A in New Albany Shale. We estimated the EUR for 33 wells, including Well A, using an existing analysis approach. We applied a unified BU-RNP method to process the one-year production/pressure transient data and performed PTA to the resulting virtual constant-rate pressure drawdown. Production analysis was performed meanwhile. Diagnosis plots for PTA and RNP analysis revealed that only the early linear flow regime was visible in the data, and permeability was estimated both from a model match and from the relationship between fracture halflength and permeability. Considering gas desorption, the fracture interference will occur only after several centuries. Based on this result, we recommend a well design strategy to increase the gas recovery factor by decreasing the facture spacing. The higher EUR of Well A compared to the vertical wells encourages drilling more MTFHWs in New Albany Shale. Advisors/Committee Members: Ehlig-Economics, Christine A. (advisor), Valko, Peter P. (committee member), Sun, Yuefeng (committee member).

Subjects/Keywords: Shale Gas; Pressure Transient Analysis; Production Analysis

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APA (6th Edition):

Song, B. (2010). Pressure Transient Analysis and Production Analysis for New Albany Shale Gas Wells. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8456

Chicago Manual of Style (16th Edition):

Song, Bo. “Pressure Transient Analysis and Production Analysis for New Albany Shale Gas Wells.” 2010. Masters Thesis, Texas A&M University. Accessed November 28, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8456.

MLA Handbook (7th Edition):

Song, Bo. “Pressure Transient Analysis and Production Analysis for New Albany Shale Gas Wells.” 2010. Web. 28 Nov 2020.

Vancouver:

Song B. Pressure Transient Analysis and Production Analysis for New Albany Shale Gas Wells. [Internet] [Masters thesis]. Texas A&M University; 2010. [cited 2020 Nov 28]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8456.

Council of Science Editors:

Song B. Pressure Transient Analysis and Production Analysis for New Albany Shale Gas Wells. [Masters Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8456


Texas A&M University

3. Pitakbunkate, Termpan. Incorporating Rigorous Height Determination into Unified Fracture Design.

Degree: MS, Petroleum Engineering, 2010, Texas A&M University

Hydraulic fracturing plays an important role in increasing production rate in tight reservoirs. The performance of the reservoir after fracturing can be observed from the productivity index. This parameter is dependent on the fracture geometry; height, length and width. Unified fracture design (UFD) offers a method to determine the fracture dimensions providing the maximum productivity index for a specific proppant amount. Then, in order to achieve the maximum productivity index, the treatment schedules including the amount of liquid and proppant used for each stage must be determined according to the fracture dimensions obtained from the UFD. The proppant number is necessary for determining the fracture geometry using the UFD. This number is used to find the maximum productivity index for a given proppant amount. Then, the dimensionless fracture conductivity index corresponding to the maximum productivity index can be computed. The penetration ration, the fracture length, and the propped fracture width can be computed from the dimensionless fracture conductivity. However, calculating the proppant number used in UFD requires the fracture height as an input. The most convenient way to estimate fracture height to input to the UFD is to assume that the fracture height is restricted by stress contrast between the pay zone and over and under-lying layers. In other words, the fracture height is assumed to be constant, independent of net pressure and equal to the thickness of the layer which has the least minimum principal stress. However, in reality, the fracture may grow out from the target formation and the height of fracture is dependent on the net pressure during the treatment. Therefore, it is necessary to couple determination of the fracture height with determination of the other fracture parameters. In this research, equilibrium height theory is applied to rigorously determine the height of fracture. Solving the problem iteratively, it is possible to incorporate the rigorous fracture height determination into the unified fracture design. Advisors/Committee Members: Valko, Peter P. (advisor), Ehlig-Economics, Christine (committee member), Taliaferro, Steven (committee member).

Subjects/Keywords: hydraulic fracturing; fracture height determination; equilibrium height; unified fracture design; incorporating rigorous height determination into unified fracture design

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Pitakbunkate, T. (2010). Incorporating Rigorous Height Determination into Unified Fracture Design. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8233

Chicago Manual of Style (16th Edition):

Pitakbunkate, Termpan. “Incorporating Rigorous Height Determination into Unified Fracture Design.” 2010. Masters Thesis, Texas A&M University. Accessed November 28, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8233.

MLA Handbook (7th Edition):

Pitakbunkate, Termpan. “Incorporating Rigorous Height Determination into Unified Fracture Design.” 2010. Web. 28 Nov 2020.

Vancouver:

Pitakbunkate T. Incorporating Rigorous Height Determination into Unified Fracture Design. [Internet] [Masters thesis]. Texas A&M University; 2010. [cited 2020 Nov 28]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8233.

Council of Science Editors:

Pitakbunkate T. Incorporating Rigorous Height Determination into Unified Fracture Design. [Masters Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8233

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