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You searched for +publisher:"Texas A&M University" +contributor:("Nars-El-Din, Hisham"). Showing records 1 – 2 of 2 total matches.

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Texas A&M University

1. Aneto, Nnenna. An In-depth Investigation of an Aluminum Chloride Retarded Mud Acid System on Sandstone Reservoirs.

Degree: MS, Petroleum Engineering, 2012, Texas A&M University

Sandstone acidizing using mud acid is a quick and complex process where dissolution and precipitation occur simultaneously. Retarded mud acids are less reactive with the rock reducing the reaction rate hence increased penetration into the formation to remove deep damage. To understand thoroughly the retarded mud acid system, an in-depth investigation of the reaction of HF (hydrofluoric) and H2SiF6 (fluorosilic acid) with alumino silicates and the retarded system is undertaken using coreflood analysis and mineralogy analysis using the inductively coupled plasma. Coreflood analysis is used to understand and investigate the permeability changes in the sandstone rock as the retarded mud acid is injected at different conditions and the inductively coupled plasma (ICP) is used to investigate the effluent samples from the coreflood analysis to properly understand this system. Several issues that have not been addressed previously in literature are identified and discussed, including an optimum flowrate when sandstone is acidized, by acidizing the sandstone rock with a retarded acid system at various flowrates and determining the initial and final permeabilities. Also investigated is the retarded acids compatibility with ferric iron and a comparison of the retarded acid system to regular acid to consequently enable a thorough understanding of the retarded mud acid system using aluminum chloride (AlRMHF). Based on the work done, it is found that the absence of a hydrochloric (HCl) preflush is very detrimental to the sandstone core as calcium fluoride is precipitated and the retarded acid system is found to be compatible with iron(III) as an impurity. The regular acid (RMHF) dissolves considerably more silicon and produces more fines than the AlRMHF. 1cc/min is found to be the optimum flowrate when a sandstone core is acidized with AlRMHF. At this low flowrate, less silicon is dissolved, more aluminum is seen in the effluent and more calcium is dissolved. The retarded aluminum acid system considerably reduces the rate of reaction as evidenced in the dissolution reaction when compared to a regular mud acid system. This reduced rate of reaction implies deeper acid penetration and ultimately deeper damage removal. Advisors/Committee Members: Nars-El-Din, Hisham (advisor), Schubert, Jerome (committee member), El-Halwagi, Mahmoud (committee member).

Subjects/Keywords: Aluminum chloride retarded mud acid; Regular mud acid; Half regular mud acid; Inductively coupled plasma; Hydrochloric acid; Hydrofluoric acid; Aluminum chloride; Coreflood

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

APA (6th Edition):

Aneto, N. (2012). An In-depth Investigation of an Aluminum Chloride Retarded Mud Acid System on Sandstone Reservoirs. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10779

Chicago Manual of Style (16th Edition):

Aneto, Nnenna. “An In-depth Investigation of an Aluminum Chloride Retarded Mud Acid System on Sandstone Reservoirs.” 2012. Masters Thesis, Texas A&M University. Accessed November 28, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10779.

MLA Handbook (7th Edition):

Aneto, Nnenna. “An In-depth Investigation of an Aluminum Chloride Retarded Mud Acid System on Sandstone Reservoirs.” 2012. Web. 28 Nov 2020.

Vancouver:

Aneto N. An In-depth Investigation of an Aluminum Chloride Retarded Mud Acid System on Sandstone Reservoirs. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2020 Nov 28]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10779.

Council of Science Editors:

Aneto N. An In-depth Investigation of an Aluminum Chloride Retarded Mud Acid System on Sandstone Reservoirs. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10779


Texas A&M University

2. Tovar, Francisco. Experimental Investigation on the Use of Water Soluble Polyacrylamides as Thickeners During CO_(2) WAG EOR.

Degree: MS, Petroleum Engineering, 2014, Texas A&M University

CO_(2) flooding often results in poor sweep efficiency due to the high mobility ratio caused by its low viscosity. To mitigate this problem, alternate injection of water and CO_(2) slugs (WAG) is widely applied. Recently, numerical simulation and core flood experiments in heavy oil indicate that the use of chemicals in the water slug may improve mobility control during WAG. Therefore, stability studies of common polymers used for EOR applications in CO_(2) saturated environments becomes necessary. Also, the possibility to extrapolate the benefits observed in heavy oil to light and medium oil reservoirs needs to be assessed as they gather the majority of the existing CO_(2) applications. This thesis presents an evaluation of the use of polymers as water thickeners during CO_(2). The work has been divided into three stages: An investigation on the stability of acrylamide based polymers exposed to CO_(2) for 328 days at 122 °F. The determination of the MMP for the system crude oil – CO_(2) using the slim tubing technique in a fast approach that employs a short column of 20 ft in length. And the execution of 12 core flooding experiments under miscible and immiscible conditions, in homogeneous and heterogeneous rock. We conclude that polyacrylamide based polymers can resist the presence of CO_(2). HPAM was able to retain 54% of its original viscosity after 215 days at 122 °F. PAM - ATBS increased its viscosity to 104% of its original viscosity after 328 days. A MMP of 1563 psia was calculated, which has a good correlation to previous laboratory measurements and EOS predictions for live oil. The core flooding experiments gave insights regarding the role of miscibility, frontal advance rate, heterogeneity and water viscosity on the viscous fingering of CO_(2) into the oil and suggested that thickening the water during WAG could be beneficial in highly heterogeneous formations. The limitations to scale reservoir heterogeneity prevented us to reach a fully understanding of the process. An approach combining numerical simulation with experimental work is recommended. Advisors/Committee Members: Barrufet, Maria A (advisor), Schechter, David S (advisor), Nars-El-Din, Hisham (committee member).

Subjects/Keywords: Carbon Dioxide; EOR; polymer

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

APA (6th Edition):

Tovar, F. (2014). Experimental Investigation on the Use of Water Soluble Polyacrylamides as Thickeners During CO_(2) WAG EOR. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153449

Chicago Manual of Style (16th Edition):

Tovar, Francisco. “Experimental Investigation on the Use of Water Soluble Polyacrylamides as Thickeners During CO_(2) WAG EOR.” 2014. Masters Thesis, Texas A&M University. Accessed November 28, 2020. http://hdl.handle.net/1969.1/153449.

MLA Handbook (7th Edition):

Tovar, Francisco. “Experimental Investigation on the Use of Water Soluble Polyacrylamides as Thickeners During CO_(2) WAG EOR.” 2014. Web. 28 Nov 2020.

Vancouver:

Tovar F. Experimental Investigation on the Use of Water Soluble Polyacrylamides as Thickeners During CO_(2) WAG EOR. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2020 Nov 28]. Available from: http://hdl.handle.net/1969.1/153449.

Council of Science Editors:

Tovar F. Experimental Investigation on the Use of Water Soluble Polyacrylamides as Thickeners During CO_(2) WAG EOR. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153449

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