Process, mechanism and impacts of scale formation in alkaline flooding by a variable porosity and permeability model

doi:10.1007/s10409-015-0554-y

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Process, mechanism and impacts of scale formation in alkaline flooding by a variable porosity and permeability model
	Zhang Z(张珍); Li JC(李家春); Li, JC (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
刊名	ACTA MECHANICA SINICA
	2016
卷号	32 期号:3 页码:406-421
关键词	Alkali Precipitation Chemical Flood Permeability Oil Recovery
ISSN号	0567-7718
DOI	10.1007/s10409-015-0554-y
产权排序	[Zhang, Zhen; Li, Jiachun] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
文献子类	期刊论文
英文摘要	In spite of the role of alkali in enhancing oil recovery (EOR), the formation of precipitation during alkaline-surfactant-polymer (ASP) flooding can severely do harm to the stratum of oil reservoirs, which has been observed in situ tests of oil fields such as scale deposits found in oil stratum and at the bottom of oil wells. On the other hand, remarkable variation of stratum parameters, e.g., pore radius, porosity, and permeability due to scale formation considerably affects seepage flow and alkaline flooding process in return. The objective of this study is to firstly examine these mutual influential phenomena and corresponding mechanisms along with EOR during alkaline flooding when the effects of precipitation are no longer negligible. The chemical kinetic theory is applied for the specific fundamental reactions to describe the process of rock dissolution in silica-based reservoirs. The solubility product principle is used to analyze the mechanism of alkali scale formation in flooding. Then a 3D alkaline flooding coupling model accounting for the variation of porosity and permeability is established to quantitatively estimate the impact of alkali scales on reservoir stratum. The reliability of the present model is verified in comparison with indoor experiments and field tests of the Daqing oil field. Then, the numerical simulations on a 1/4 well group in a 5-spot pattern show that the precipitation grows with alkali concentration, temperature, and injection pressure and, thus, reduces reservoir permeability and oil recovery correspondingly. As a result, the selection of alkali with a weak base is preferable in ASP flooding by tradeoff strategy.
分类号	二类
URL标识	查看原文
WOS关键词	Alkali ; Precipitation ; Chemical flood ; Permeability ; Oil recovery
WOS研究方向	Engineering ; Mechanics
语种	英语
WOS记录号	WOS:000379181600006
资助机构	The project was supported by the National Basic Research Program of China (Grant 2005CB221300) and the National Natural Science Foundation of China (Grant 11302234).
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/59516]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者	Li, JC (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Zhang Z,Li JC,Li, JC . Process, mechanism and impacts of scale formation in alkaline flooding by a variable porosity and permeability model[J]. ACTA MECHANICA SINICA,2016,32(3):406-421.
APA	张珍,李家春,&Li, JC .(2016).Process, mechanism and impacts of scale formation in alkaline flooding by a variable porosity and permeability model.ACTA MECHANICA SINICA,32(3),406-421.
MLA	张珍,et al."Process, mechanism and impacts of scale formation in alkaline flooding by a variable porosity and permeability model".ACTA MECHANICA SINICA 32.3(2016):406-421.