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You searched for subject:(fractured horizontal well). Showing records 1 – 3 of 3 total matches.

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1. Lin, Jiajing. The Performance of Fractured Horizontal Well in Tight Gas Reservoir.

Degree: 2012, Texas A&M University

Horizontal wells have been used to increase reservoir recovery, especially in unconventional reservoirs, and hydraulic fracturing has been applied to further extend the contact with the reservoir to increase the efficiency of development. In the past, many models, analytical or numerical, were developed to describe the flow behavior in horizontal wells with fractures. Source solution is one of the analytical/semi-analytical approaches. To solve fractured well problems, source methods were advanced from point sources to volumetric source, and pressure change inside fractures was considered in the volumetric source method. This study aims at developing a method that can predict horizontal well performance and the model can also be applied to horizontal wells with multiple fractures in complex natural fracture networks. The method solves the problem by superposing a series of slab sources under transient or pseudosteady-state flow conditions. The principle of the method comprises the calculation of semi-analytical response of a rectilinear reservoir with closed outer boundaries. A statistically assigned fracture network is used in the study to represent natural fractures based on the spacing between fractures and fracture geometry. The multiple dominating hydraulic fractures are then added to the natural fracture system to build the physical model of the problem. Each of the hydraulic fractures is connected to the horizontal wellbore, and the natural fractures are connected to the hydraulic fractures through the network description. Each fracture, natural or hydraulically induced, is treated as a series of slab sources. The analytical solution of superposed slab sources provides the base of the approach, and the overall flow from each fracture and the effect between the fractures are modeled by applying superposition principle to all of the fractures. It is assumed that hydraulic fractures are the main fractures that connect with the wellbore and the natural fractures are branching fractures which only connect with the main fractures. The fluid inside of the branch fractures flows into the main fractures, and the fluid of the main fracture from both the reservoir and the branch fractures flows to the wellbore. Predicting well performance in a complex fracture network system is extremely challenged. The statistical nature of natural fracture networks changes the flow characteristic from that of a single linear fracture. Simply using the single fracture model for individual fracture, and then adding the flow from each fracture for the network could introduce significant error. This study provides a semi-analytical approach to estimate well performance in a complex fracture network system. Advisors/Committee Members: Zhu, Ding (advisor), Hill, A. Daniel (committee member), Ghassemi, Ahmad (committee member), Battle, Guy (committee member).

Subjects/Keywords: Fractured horizontal well; Natural fractures; complex fracture system; Source model; semi-analytical solution; transient flow

fractured horizontal well performance in tight/shale gas reservoirs. It will accomplish the… …Multiple fractures along a horizontal well  Hydraulic fractured well with natural fractures 3… …movement is from a complex fractured well system, Horizontal well models with point source… …50 3.1 Uniform Flux Horizontal Well… …50 3.2 Fully Penetrating Transverse Fracture Intercepting a Horizontal Well… 

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

APA (6th Edition):

Lin, J. (2012). The Performance of Fractured Horizontal Well in Tight Gas Reservoir. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10639

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Lin, Jiajing. “The Performance of Fractured Horizontal Well in Tight Gas Reservoir.” 2012. Thesis, Texas A&M University. Accessed January 18, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10639.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Lin, Jiajing. “The Performance of Fractured Horizontal Well in Tight Gas Reservoir.” 2012. Web. 18 Jan 2019.

Vancouver:

Lin J. The Performance of Fractured Horizontal Well in Tight Gas Reservoir. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jan 18]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10639.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lin J. The Performance of Fractured Horizontal Well in Tight Gas Reservoir. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10639

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Colorado School of Mines

2. Greenwood, Judson T. Analytical investigation of boundaries in naturally fractured unconventional reservoirs, An.

Degree: MS(M.S.), Petroleum Engineering, 2007, Colorado School of Mines

This research presents a heuristic approach to develop an analytical model to study the effects of a stimulated zone in a fractured unconventional reservoir and the inherent boundaries that are observed. To simulate a stimulated reservoir volume (SRV) around the fractured horizontal well surrounded by a virgin outer reservoir, three separate solutions are generated and superimposed: Solution 1 - a multiply fractured, horizontal-well in an infinite-acting, homogeneous reservoir with the properties of the outer zone; Solution 2 - a multiply fractured, horizontal-well in a bounded, homogeneous (un-fractured) reservoir with the properties of the outer reservoir; and Solution 3 - a multiply fractured, horizontal-well in a bounded, naturally fractured reservoir with the properties of the stimulated zone. The solution for the composite reservoir consisting of a stimulated (naturally fractured) reservoir surrounded by an infinite acting, un-fractured (virgin) reservoir is obtained by subtracting Solution 2 from Solution 1 and then adding Solution 3. The same approach is also applied to develop a solution for the case where there is an additional transition zone between the SRV and the outer (virgin) reservoir. This method creates an approximate solution for the composite-reservoir system. Although the model is derived analytically, computations require numerical methods and the model is therefore referred to as semi-analytical. The model is verified against literature models and an industry numerical simulator to find its limitations. This verification shows that the accuracy of the model is dependent on the size of the stimulated zone. For a large stimulated zone, because the flux profiles along the boundaries of the fractured (Solution 3) and un-fractured (Solution 2) reservoirs are not equal, the model over-predicts the drawdown pressure. However in real-world examples of multiply fractured horizontal wells, the stimulated zone is much smaller and the model closely matches the drawdown pressures calculated in the numerical simulator. Therefore, the heuristic approach used in this work leads to an ad-hoc solution for the common configurations of fractured horizontal wells in shale reservoirs. Several synthetic examples are considered to show that the solution developed in this work can be used to identify the flow regimes after the effect of the stimulated reservoir boundary (that is, the fracture tip effects) are felt. This is an advantage over the commonly used trilinear model when the diffusivities of the stimulated and virgin reservoirs are comparable. Although not explored in this research, the ultimate utility of the proposed approach is in modeling multiple fractured-horizontal-wells to study the interference among SRVs. The fracture enhancement and extent influence the productivity of the well more than any other parameter and should be of utmost importance to characterize. And last, this model can be used with other tools to identify optimal full field development. Advisors/Committee Members: Ozkan, E. (advisor), Miskimins, Jennifer L. (committee member), Tutuncu, Azra (committee member).

Subjects/Keywords: Shale; Boundaries; Analytical Modeling; Reservoir Engineering; Fractured; Unconventional; Shale gas; Horizontal gas well drilling; Porosity; Mathematical models; Natural gas

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

APA (6th Edition):

Greenwood, J. T. (2007). Analytical investigation of boundaries in naturally fractured unconventional reservoirs, An. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/17084

Chicago Manual of Style (16th Edition):

Greenwood, Judson T. “Analytical investigation of boundaries in naturally fractured unconventional reservoirs, An.” 2007. Masters Thesis, Colorado School of Mines. Accessed January 18, 2019. http://hdl.handle.net/11124/17084.

MLA Handbook (7th Edition):

Greenwood, Judson T. “Analytical investigation of boundaries in naturally fractured unconventional reservoirs, An.” 2007. Web. 18 Jan 2019.

Vancouver:

Greenwood JT. Analytical investigation of boundaries in naturally fractured unconventional reservoirs, An. [Internet] [Masters thesis]. Colorado School of Mines; 2007. [cited 2019 Jan 18]. Available from: http://hdl.handle.net/11124/17084.

Council of Science Editors:

Greenwood JT. Analytical investigation of boundaries in naturally fractured unconventional reservoirs, An. [Masters Thesis]. Colorado School of Mines; 2007. Available from: http://hdl.handle.net/11124/17084


ETH Zürich

3. Pesendorfer, Marc. Hydrogeologic exploration and tunneling in a karstified and fractured limestone aquifer (Lötschberg Base Tunnel, Switzerland).

Degree: 2006, ETH Zürich

Subjects/Keywords: GRUNDWASSERNEUBILDUNG (HYDROLOGIE); GRUNDWASSERLEITER/KARSTFORMATIONEN (HYDROLOGIE); FRACTURED ROCKS + CLEAVAGE (GEOLOGY); PUMPING TEST (HYDROLOGY); HELVETISCHE DECKEN (GEOLOGIE); AQUIFER/KARST AQUIFER (HYDROLOGY); LÖTSCHBERG (BERNER ALPEN); HELVETIC NAPPES (GEOLOGY); TUNNELBAUGESCHICHTE; HORIZONTAL DRILLING, WELLS (MINING); GRUNDWASSERFLUSS + BRUNNENHYDRAULIK (HYDROLOGIE); GROUNDWATER TABLE RECHARGE (HYDROLOGY); HISTORY OF TUNNELLING; PUMPVERSUCH (HYDROLOGIE); LÖTSCHBERG (BERNESE ALPS); KLÜFTE + SPALTEN (GEOLOGIE); HORIZONTALE BOHRUNG (BERGBAU); GROUNDWATER FLOW + WELL HYDRAULICS (HYDROLOGY); info:eu-repo/classification/ddc/550; info:eu-repo/classification/ddc/550; Earth sciences; Earth sciences

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

APA (6th Edition):

Pesendorfer, M. (2006). Hydrogeologic exploration and tunneling in a karstified and fractured limestone aquifer (Lötschberg Base Tunnel, Switzerland). (Doctoral Dissertation). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/149500

Chicago Manual of Style (16th Edition):

Pesendorfer, Marc. “Hydrogeologic exploration and tunneling in a karstified and fractured limestone aquifer (Lötschberg Base Tunnel, Switzerland).” 2006. Doctoral Dissertation, ETH Zürich. Accessed January 18, 2019. http://hdl.handle.net/20.500.11850/149500.

MLA Handbook (7th Edition):

Pesendorfer, Marc. “Hydrogeologic exploration and tunneling in a karstified and fractured limestone aquifer (Lötschberg Base Tunnel, Switzerland).” 2006. Web. 18 Jan 2019.

Vancouver:

Pesendorfer M. Hydrogeologic exploration and tunneling in a karstified and fractured limestone aquifer (Lötschberg Base Tunnel, Switzerland). [Internet] [Doctoral dissertation]. ETH Zürich; 2006. [cited 2019 Jan 18]. Available from: http://hdl.handle.net/20.500.11850/149500.

Council of Science Editors:

Pesendorfer M. Hydrogeologic exploration and tunneling in a karstified and fractured limestone aquifer (Lötschberg Base Tunnel, Switzerland). [Doctoral Dissertation]. ETH Zürich; 2006. Available from: http://hdl.handle.net/20.500.11850/149500

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