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Interfacial phenomena in enhanced he...

Liu, Qiang.

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Interfacial phenomena in enhanced heavy oil recovery by alkaline flood.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Interfacial phenomena in enhanced heavy oil recovery by alkaline flood./
作者:	Liu, Qiang.
面頁冊數:	219 p.
附註:	Source: Dissertation Abstracts International, Volume: 67-10, Section: B, page: 6032.
Contained By:	Dissertation Abstracts International67-10B.
標題:	Engineering, Petroleum. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR18865
ISBN:	9780494188651

Interfacial phenomena in enhanced heavy oil recovery by alkaline flood.
Liu, Qiang.

Interfacial phenomena in enhanced heavy oil recovery by alkaline flood. - 219 p.

Source: Dissertation Abstracts International, Volume: 67-10, Section: B, page: 6032.

Thesis (Ph.D.)--The University of Regina (Canada), 2006.

Alkaline flood has been extensively studied in enhanced oil recovery (EOR) for conventional oils, including numerous laboratory experiments and some field tests. For heavy oils, the investigations on enhanced oil recovery by alkaline flood are very limited due to the adverse mobility ratio between the water and oil phases.

ISBN: 9780494188651Subjects--Topical Terms:

1018448
Engineering, Petroleum.

Interfacial phenomena in enhanced heavy oil recovery by alkaline flood.
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245 1 0 $a Interfacial phenomena in enhanced heavy oil recovery by alkaline flood.
300 $a 219 p.
500 $a Source: Dissertation Abstracts International, Volume: 67-10, Section: B, page: 6032.
502 $a Thesis (Ph.D.)--The University of Regina (Canada), 2006.
520 $a Alkaline flood has been extensively studied in enhanced oil recovery (EOR) for conventional oils, including numerous laboratory experiments and some field tests. For heavy oils, the investigations on enhanced oil recovery by alkaline flood are very limited due to the adverse mobility ratio between the water and oil phases.
520 $a In this thesis, an EOR method by alkaline flood is invented for the heavy oils in Western Canada with viscosities varying from 650 to 18,000 mPa·s. The tertiary oil recovery reached 20--30% of initial oil in place in homogeneous or channeled sandpack flood tests. The results of sandpack flood tests suggest that alkaline flood is a promising enhanced oil recovery process for Western Canadian heavy oil reservoirs.
520 $a It has been observed in micromodel tests that two mechanisms govern the EOR process. One is a novel mechanism, water-in-oil (W/O) emulsion and partial wettability alteration. The W/O emulsion formed by the injection of alkaline solution blocks the high permeability zone and the pore walls alter to partially oil-wet from water-wet, leading to the increased pressure drop and high tertiary oil recovery. The other mechanism is oil-in-water (O/W) emulsion. Heavy oil is emulsified in brine by an alkaline/surfactant formula and then entrained in the water phase and produced out of deposits.
520 $a In the heavy oil/alkaline solution/sand system, the wettability of sand is altered from water-wet to oil-wet by a magnesium (Mg2+) ion binding mechanism. The negative charges of oil/water and water/sand interfaces are greatly reduced by Mg2+ adsorption. The ionized organic acids can partition into the water phase and then attach onto a solid surface mainly by magnesium ion binding, making sand surface more oil-wet. Wettability alteration occurs during the movement of W/O emulsion, contributing to the blocking of water channels. For the mechanism of O/W emulsion, the synergistic enhancement of alkali with a dilute concentration of surfactant results in ultralow dynamic interfacial tension and high surface charge density at the oil/water interface and, subsequently, emulsification of the heavy oil under slight interfacial disturbance.
520 $a Alkaline loss was investigated in this thesis because it reduces the EOR efficiency. The results of bottle tests show that alkaline loss on clay is more severe than on sand. In sandpack flood tests, alkaline loss is less when relatively low alkaline concentrations (0.2-0.4 wt% NaOH and 0.1-0.2 wt% Na2CO3) and a larger injection slug were applied.
590 $a School code: 0148.
650 4 $a Engineering, Petroleum. $3 1018448
690 $a 0765
710 2 0 $a The University of Regina (Canada). $3 1017617
773 0 $t Dissertation Abstracts International $g 67-10B.
790 $a 0148
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR18865