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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Study of the Chemical Flooding Effect in Gao-63 Reservoir
Author(s)
Qiuyan Li, Xiang’an Yue, Bo Zhang, Kai Liu and Lei Yang
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DOI:10.17265/2162-5298/2017.07.002
Affiliation(s)
Key Laboratory of Petroleum Engineering, Ministry of Education, China University of Petroleum, Beijing 102249, China
ABSTRACT
This article is aimed to discuss the impact of using two different kinds
of surfactant in enhancing oil recovery in heterogeneous reservoirs. With the
background of Jidong oilfield, Rui Feng surfactant which could reach ultra-low
interfacial tension and combination surfactant RZ-JD80 with
strong emulsifying property are chosen to do oil
displacement and profile control-oil displacement experiment in homogeneous
core and heterogeneous core respectively. The experiment is aimed to study the
effect of oil displacement by injecting surfactant individually and the effect
after injecting different profile control agent slug before surfactant flooding
in heterogeneous cores. The results suggest that injecting Rui Feng surfactant
and RZ-JD80 individually could enhance the oil displacement efficiency about 15
percentage points for homogeneous core. For strongly heterogeneous core, it is
low efficiency by using either of these two surfactants individually. However,
if injected a very little profile control agent slug before surfactant
flooding, both of these two kinds of surfactant could enhance the oil recovery
by different degree, especially, polymer microsphere plugging¾RZ-JD80 flooding composite technology is more
adaptable to Gao-63 reservoir. This
technology could increase the recovery by 18.52 percentage points after
surfactant flooding.
KEYWORDS
Low permeability, heterogeneous reservoir, surfactant flooding, emulsification, profile control.
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