Application of BERO Biosurfactant in Pucheng Oilfield and Its Effect

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Application of BERO™ Biosurfactant in Pucheng Oilfield and Its Effect
After a long time of exploration in the PuCheng oilfield, wax, asphaltene and other
substances with oil flow process due to the lower pressure and temperature, crystals
deposited on the inner wall of the oil passage in the rock caused the clogging of the oil
passage, resulting in a sharp decline in oil production, restricting the sustainable
development of the oilfield.
To effectively solve this problem, developed a new plugging agent - BERO™
biosurfactant and made a performance evaluation, the evaluation indicates that the
biosurfactant has good temperature resistance, water-soluble, can be easily separated
from the oil, and zero pollution. Implementation on 25 wells, effective 24 wells, cumulative
increased 27,231.8bbls of oil, input-output ratio of 1:3.6, and did not cause any
environmental pollution problems, made good economic and social benefits, has broad
application prospects.
Currently, Pucheng Oilfield is in late-stage development, a variety of problems to some
extent restricts sustainable development of the oilfield. The production decline resulting
from the formation plugging is also part of the reason. Take statistics of historical
blockage, found the main cause of oil passage plugging is three aspects: First, wax,
asphaltene and other substances deposited on the inner wall of the oil passage of the
rock, cause blockage of the oil passage in the near wellbore, this accounted for 45 %;
Second, After a longer-term production, the volume of the solid particles in the crude oil
increases, resulting in the formation of the hole tract blockage, that accounts for 37%;
Third is due to the hydration expansion of the high clay content formation reduces the
formation permeability, this accounted for 12%. Usually solving such kind of problem is
acidified, after years of on-site implementation proving acidification caused by the above
three cases cannot achieve the desired effect, and will cause environmental pollution. To
solve the problem, BERO™biosurfactant unplugged technology through laboratory
experiments demonstrated its' plugging removal mechanism and performance evaluation,
with a field test, achieved good economic and social benefits.
Refer to the implementation of the different categories of plugging wells in PuCheng
Oilfield, we classified implementation for different wells, 25 wells were implemented
throughout the year.
UNITED STATES
Add: 12212 Ashling Dr Stafford, TX, 77477
Tel: +1713 893 4784
CHINA
Add:Nanopolis Suzhou: NW02, Room 110,
99 JinjiLake Avenue,Jiangsu Province, P.R. China.
Zip: 215123
Tel: +86 512-6999 5236 Fax: +86 512-6999 5237
E-mail: contact@zfatech.com

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Wells clean implementation effect of biosurfactant
 Note Plugging Type
1) Considering wax, asphaltene and other substances flow with oil, pressure and
temperature decreases, the crystals deposited on the inner wall of the oil passage of
the rock, cause blockage of the oil passage in the near wellbore;
2) After a longer-term production, crude oil solid phase particle volume increases,
resulting in the formation of the hole tract blockage;
3) Due to the high clay content formation, expansion due to hydration reduces the
formation permeability;
4) By the effect analysis, BERO™’s working effect on 1 and 2 for the case plugging is
very satisfactory, for 3, the effect is not obvious, it once again proves BERO™’s
removal mechanism to the plugging.
 Economic
Input-output ratio: 1:4.357
 Analysis of typical well
UNITED STATES
Add: 12212 Ashling Dr Stafford, TX, 77477
Tel: +1713 893 4784
CHINA
Add:Nanopolis Suzhou: NW02, Room 110,
99 JinjiLake Avenue,Jiangsu Province, P.R. China.
Zip: 215123
Tel: +86 512-6999 5236 Fax: +86 512-6999 5237
E-mail: contact@zfatech.com

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Well Pu 3-418 of Zhongyuan Oilfield features high water cut and low permeability,it was
completed on January 16th, 2002. This well had a daily average oil production in 2005
and 2006 of 9.4 BOPD and 5.8 BOPD respectively. Through analysis, the Company
believes that the main reason for production reduction is the blockage of near-wellbore
zone. According to production need and the requirements of geological solution of Well
Pu 3-418, the BERO™ biosurfactant was used to remove plugging for Well Pu 3-418 on
November 2, 2006. After the plugging removal, the average daily liquid production of this
well reaches 100.8 BFPD, water cut 67% and daily oil production 33.1 BOPD currently,
exceeding the maximum production in the past. Compared with the daily oil production in
2005, oil production increased by 300% after the plugging removal;while compared with
the daily oil production in 2006 before plugging removal, oil production increased by
400%; It is proved that plugging removal by using BERO™ biosurfactant is effective. As
of July 2007, the daily oil production of this well maintained at 33.1 BOPD and the crude
oil production increased by about 5760 bbls on a cumulative basis.
 Conclusion
The technology application analysis, which has good results, proved that the technology
is a pollution-free, non-hazardous to environment, non-hazardous to formation, less
investment and high efficiency biological technology.
With the field development continues, plugging will cause serious problem during oilfield
operation, BERO™biosurfactant plugging removal technique has extremely broad
application prospects.
BERO™biosurfactant has a very strong ability in releasing the hydrocarbon on the
UNITED STATES
Add: 12212 Ashling Dr Stafford, TX, 77477
Tel: +1713 893 4784
CHINA
Add:Nanopolis Suzhou: NW02, Room 110,
99 JinjiLake Avenue,Jiangsu Province, P.R. China.
Zip: 215123
Tel: +86 512-6999 5236 Fax: +86 512-6999 5237
E-mail: contact@zfatech.com

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surface of reservoir rock particles, and does not form a hydrocarbon emulsification, in
theory, BERO™biosurfactant can be used as a good displacing agent, but this proposal
remains to be further studied.
UNITED STATES
Add: 12212 Ashling Dr Stafford, TX, 77477
Tel: +1713 893 4784
CHINA
Add:Nanopolis Suzhou: NW02, Room 110,
99 JinjiLake Avenue,Jiangsu Province, P.R. China.
Zip: 215123
Tel: +86 512-6999 5236 Fax: +86 512-6999 5237
E-mail: contact@zfatech.com