Development and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs

In view of the problems of low permeability, high oil viscosity and freezing point, and low productivity of single well in Luo 321 and Luo 36 blocks of Luojia Oilfield, the chemical viscosity-reducing cold production technology was studied. By analyzing the properties of crude oil, it is concluded t...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Zhenfu Ma, Kai Zhang, Mengjie Zhao, Lu Liu, Chao Zhong, Jian Wang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/1ab221d16eef41a9abd02eb7112bd685
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:1ab221d16eef41a9abd02eb7112bd685
record_format	dspace
spelling	oai:doaj.org-article:1ab221d16eef41a9abd02eb7112bd6852021-11-08T02:36:54ZDevelopment and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs1099-052610.1155/2021/3046584https://doaj.org/article/1ab221d16eef41a9abd02eb7112bd6852021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/3046584https://doaj.org/toc/1099-0526In view of the problems of low permeability, high oil viscosity and freezing point, and low productivity of single well in Luo 321 and Luo 36 blocks of Luojia Oilfield, the chemical viscosity-reducing cold production technology was studied. By analyzing the properties of crude oil, it is concluded that the reason for high viscosity and high freezing point is the high content of asphaltene, pectin, and wax. The viscosity is mainly affected by asphaltene; the wax precipitation point and pour point are mainly affected by the wax; and the solidification point is affected by the wax and asphaltene. The treatment idea of reducing viscosity and inhibiting wax is determined. By compounding the synthetic pour point depressant POA-VA and the viscosity reducer DBD-DOPAMA, the effect of reducing the viscosity and freezing point of crude oil was evaluated. PD-7 (POA-VA 40%, DBD-DOPAMA 50%, and P-10C 10%) system was selected as the optimal formula. When the concentration of the system is 10%, the viscosity reduction rate reaches 95.2%; the freezing point can reduce by 10.2°C; it has good oil sample adaptability, salinity resistance, and temperature resistance; and the oil washing rate can reach more than 60%. The oil displacement system was injected into the formation by means of multiconcentration and multislug and was applied in the field of Luo 321-2 Well. A total of 500 t of the oil displacement system was injected, and the effect of measures lasted for 400 days, with a cumulative oil increase of 883 t. It has been applied in different blocks 30 times and achieved a good field application effect.Zhenfu MaKai ZhangMengjie ZhaoLu LiuChao ZhongJian WangHindawi-WileyarticleElectronic computers. Computer scienceQA75.5-76.95ENComplexity, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Electronic computers. Computer science QA75.5-76.95
spellingShingle	Electronic computers. Computer science QA75.5-76.95 Zhenfu Ma Kai Zhang Mengjie Zhao Lu Liu Chao Zhong Jian Wang Development and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs
description	In view of the problems of low permeability, high oil viscosity and freezing point, and low productivity of single well in Luo 321 and Luo 36 blocks of Luojia Oilfield, the chemical viscosity-reducing cold production technology was studied. By analyzing the properties of crude oil, it is concluded that the reason for high viscosity and high freezing point is the high content of asphaltene, pectin, and wax. The viscosity is mainly affected by asphaltene; the wax precipitation point and pour point are mainly affected by the wax; and the solidification point is affected by the wax and asphaltene. The treatment idea of reducing viscosity and inhibiting wax is determined. By compounding the synthetic pour point depressant POA-VA and the viscosity reducer DBD-DOPAMA, the effect of reducing the viscosity and freezing point of crude oil was evaluated. PD-7 (POA-VA 40%, DBD-DOPAMA 50%, and P-10C 10%) system was selected as the optimal formula. When the concentration of the system is 10%, the viscosity reduction rate reaches 95.2%; the freezing point can reduce by 10.2°C; it has good oil sample adaptability, salinity resistance, and temperature resistance; and the oil washing rate can reach more than 60%. The oil displacement system was injected into the formation by means of multiconcentration and multislug and was applied in the field of Luo 321-2 Well. A total of 500 t of the oil displacement system was injected, and the effect of measures lasted for 400 days, with a cumulative oil increase of 883 t. It has been applied in different blocks 30 times and achieved a good field application effect.
format	article
author	Zhenfu Ma Kai Zhang Mengjie Zhao Lu Liu Chao Zhong Jian Wang
author_facet	Zhenfu Ma Kai Zhang Mengjie Zhao Lu Liu Chao Zhong Jian Wang
author_sort	Zhenfu Ma
title	Development and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs
title_short	Development and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs
title_full	Development and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs
title_fullStr	Development and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs
title_full_unstemmed	Development and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs
title_sort	development and application of efficient oil displacement system for middle-low permeability and high pour-point heavy oil reservoirs
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/1ab221d16eef41a9abd02eb7112bd685
work_keys_str_mv	AT zhenfuma developmentandapplicationofefficientoildisplacementsystemformiddlelowpermeabilityandhighpourpointheavyoilreservoirs AT kaizhang developmentandapplicationofefficientoildisplacementsystemformiddlelowpermeabilityandhighpourpointheavyoilreservoirs AT mengjiezhao developmentandapplicationofefficientoildisplacementsystemformiddlelowpermeabilityandhighpourpointheavyoilreservoirs AT luliu developmentandapplicationofefficientoildisplacementsystemformiddlelowpermeabilityandhighpourpointheavyoilreservoirs AT chaozhong developmentandapplicationofefficientoildisplacementsystemformiddlelowpermeabilityandhighpourpointheavyoilreservoirs AT jianwang developmentandapplicationofefficientoildisplacementsystemformiddlelowpermeabilityandhighpourpointheavyoilreservoirs
_version_	1718443070132846592

Development and Application of Efficient Oil Displacement System for Middle-Low Permeability and High Pour-Point Heavy Oil Reservoirs

Ejemplares similares