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

doi:10.1007/s10409-015-0554-y

IMECH-IR > 流固耦合系统力学重点实验室

	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.
发表期刊	ACTA MECHANICA SINICA
	2016
卷号	32 期号:3 页码:406-421
ISSN	0567-7718
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.
关键词	Alkali Precipitation Chemical Flood Permeability Oil Recovery
DOI	10.1007/s10409-015-0554-y
URL	查看原文
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:000379181600006
关键词[WOS]	Alkali ; Precipitation ; Chemical flood ; Permeability ; Oil recovery
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
项目资助者	The project was supported by the National Basic Research Program of China (Grant 2005CB221300) and the National Natural Science Foundation of China (Grant 11302234).
课题组名称	LMFS水环境流体力学(LEM)
论文分区	二类
力学所作者排名	True
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/59516
专题	流固耦合系统力学重点实验室
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.

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