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Climate Change 2016
October 27-29, 2016
Volume 7, Issue 9(Suppl)
J Earth Sci Clim Change
ISSN: 2157-7617 JESCC, an open access journal
conferenceseries
.com
October 24-26, 2016 Valencia, Spain
World Conference on
Climate Change
CO
2
EOR and sequestration technologies in petro China
Mingqiang Hao, Yongle Hu
and
Wenhui Li
Petro China Research Institute of Petroleum Exploration & Development, China
C
O
2
flooding technologies which can reduce CO
2
emission while enhancing oil recovery, is the best way to realize CO2
emission in present economic and technology condition. Therefore, the major oil companies and some government
organizations have keep an eye on it. China conducted laboratory study of CO2 flooding in Daqing Oil Field and Shengli’Oil
Field in the mid of 1960s. Some pilot tests were conducted in Daqing Oil Field, Jiangsu Oil Field and Shengli Oil Field in
the mid of 1990s. But eventually the CO2 flooding technology was developing slowly in some reasons such as the lack of
natural CO2 resources in China, the prominent contradiction of gas channeling. During the 10th five-year planning stage,
a large number of high CO2 reservoirs have been found in Songliao Basin. The following, some national projects, company
projects and oil field company projects were implemented to restart tackling the key problem of the CO2 flooding technology
for the characteristics of our continental reservoirs and significant technology achievements have been achieved. The results
show that besides C2-C
⁶
, C7-C
15
also has strong ability of mass transfer and it is useful for phase mixing. We have synthesized
hydrocarbon surface active agent CAE to reduce the MMP and defined a new hydrocarbon component factor Xf=(C
2
-C
15
)/
(C
1
+N2+C
16
+) that better describe the relationship between component and MMP. Promoted and applied WAG injection,
and development indices variation, such as gas/oil ratio, replacement ratio, and water content for CO2 flooding in high water
cut reservoirs were. We also established WAG flooding characteristic curve equation that includes the effect of miscible phase
degree; uniform replacement in heterogeneous reservoir could be reached through adjustment of injection-production ratio.
Two separated layer gas flooding processes are conducted and then transformed from commingled gas injection to separated
layer gas flooding technology. We developed an on-line anti-corrosion monitoring system, core lift equipments and three kinds
of effective lift technology. Studied on the phase characteristic of CO2 under different velocity and impurity were conducted,
and we established the optimization method and process of pipeline design. Several technologies like circularity water, gas/
liquid mixture transportation, centralized separation and measurement, airtight gathering and transportation, and studied
on separation and purification technologies and formed three kinds of CO2 flooding produced gas injection technologies
are formed. CO2 geological storage capacity calculation method was formulated to compute the relative parameters. We also
collected CO2 emission data for more than 600 enterprises in eight major industries, and conducted primary plan of sinks and
sources matching features. And some pilots were conducted in block Hei59, Hei79, Hei46 of Daqingzijing Oil Field, the oil
recovery can improve more than 10%, and the CO2 geological sequestration rate is above 90%.
Biography
Mingqiang Hao is currently working at Petro China Research Institute of Petroleum Exploration & Development, China. Mingqiang Hao research interests are CO2
Capture and Sequestration, Climate Change and Health etc.
Mingqiang Hao et al., J Earth Sci Clim Change 2016, 7:9(Suppl)
http://dx.doi.org/10.4172/2157-7617.C1.027