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<span style="font-size:20.0pt;font-family:"Tahoma",sans-serif;mso-fareast-font-family:
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<span style="font-family:"Tahoma",sans-serif;mso-fareast-font-family:"Times New Roman""><o:p> </o:p></span></h2>
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<span style="font-family:"Tahoma",sans-serif;mso-fareast-font-family:"Times New Roman"">Invites the Cullen College of Engineering
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<span style="font-family:"Tahoma",sans-serif;mso-fareast-font-family:"Times New Roman"">To the
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<span style="font-family:"Tahoma",sans-serif;mso-fareast-font-family:"Times New Roman"">PhD Dissertation Defense</span></h2>
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<span style="font-family:"Tahoma",sans-serif;mso-fareast-font-family:"Times New Roman"">Guofan Luo</span></h2>
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<b><span style="font-size:14.0pt;font-family:"Tahoma",sans-serif">Topic: Single Well Completion and Management Strategies for Enhanced Recovery of Tight Oil Using Miscible Gas Injection</span></b></p>
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<b><span style="mso-bidi-font-family:Calibri;color:#1F497D"><o:p> </o:p></span></b></p>
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<b><span style="font-size:12.0pt">Date: Thursday, November 21, 2019</span></b></p>
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<b><span style="font-size:12.0pt"><o:p> </o:p></span></b></p>
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<b><span style="font-size:12.0pt">Location: Technology Bridge (Formerly ERP)</span></b><span style="font-size:12.0pt"> Building 9, Room<b> 123</b></span></p>
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<b><span style="font-size:12.0pt">Time: </span></b><span style="font-size:12.0pt">8:00 am – 10:00 am<b></b></span></p>
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<b><span style="font-size:12.0pt"><o:p> </o:p></span></b></p>
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<b><span style="font-size:12.0pt">Committee Chair:<span style="color:#1F497D"> </span>
</span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Dr.
</span><span style="mso-bidi-font-size:12.0pt;font-family:"Times New Roman",serif;
mso-fareast-font-family:"Times New Roman"">Christine Ehlig-Economides</span></p>
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<b><span style="font-size:12.0pt">Committee Co-Chair:<span style="color:#1F497D">
</span></span></b><span style="mso-bidi-font-size:12.0pt;font-family:"Times New Roman",serif;
mso-fareast-font-family:"Times New Roman"">Dr. Michael Nikolaou</span><b><span style="font-size:12.0pt;color:#1F497D"></span></b></p>
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<b><span style="font-size:12.0pt"><o:p> </o:p></span></b></p>
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<b><span style="font-size:12.0pt">Committee Members:</span></b></p>
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<span style="font-size:12.0pt;font-family:"Times New Roman",serif">Dr. </span><span style="mso-bidi-font-size:12.0pt;font-family:"Times New Roman",serif;
mso-fareast-font-family:"Times New Roman"">Guan Qin</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif">,
Dr.</span><span style="mso-bidi-font-size:12.0pt;font-family:"Times New Roman",serif;
mso-fareast-font-family:"Times New Roman""> George K. Wong</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif">, Dr.
</span><span style="mso-bidi-font-size:12.0pt;font-family:"Times New Roman",serif;
mso-fareast-font-family:"Times New Roman"">Ganesh Thakur</span><span style="font-family:"Times New Roman",serif"></span></p>
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<a>Abstract</a><span style="mso-bookmark:_Toc134716"></span><span style="font-family:"Calibri Light",sans-serif"></span></h2>
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<span style="font-family:"Times New Roman",serif"><span style="mso-spacerun:yes">
</span>Less than 10% primary oil recovery from horizontal wells creates a strong incentive for enhancing recovery from tight oil reservoirs in the US. Attempts at well to well displacement using water and gas as injection fluid failed in tight oil largely due
to short-circuits along fractures connecting adjacent injection and production wells. As an alternative, operators have tried alternating miscible gas injection with production in a single well mimicking the huff-and-puff (HAP) technique that originated with
steam injection in heavy oil wells. HAP field tests in the Eagle Ford play have shown limited success. To improve the production performance of HAP, this research focused completion designs enabling displacements between alternating injection and production
fractures in a single well. <span style="mso-spacerun:yes"> </span>The single well configurations designate alternating fractures along the horizontal well as either injection or production. Two strategies are studied. The first strategy considers a continuous
injection and production process in a single-well alternating simultaneous injection and production (SWASIP) configuration. The second strategy alternates injection and production as a single-well alternating production (SWAP) configuration.</span></p>
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</span>We use miscible carbon dioxide as the injection fluid. We use the GEM compositional simulator to model SWASIP and SWAP performance in a heterogeneous reservoir. We described the downhole completion components including monitoring and control devices
required for managing many simultaneous displacements in the single well. SWASIP well management requires action in the event of a displacement short circuit, such as a cement leak. In contrast, the SWAP well configuration is more robust and will not suffer
significant productivity or performance loss in the event of a displacement short circuit.
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<span style="font-family:"Times New Roman",serif"><span style="mso-spacerun:yes">
</span>Both SWASIP and SWAP significantly enhance oil recovery over HAP. SWAP recovery requires a longer time than SWASIP. However, SWASIP requires additional completion equipment for the well management that renders SWAP likely to be the more cost effective
choice.</span></p>
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