The document discusses the application of BEROTM biosurfactant in the Yanchang Oilfield in China. It describes how the biosurfactant was used to increase oil production in four wells that were experiencing reductions due to wax and organic matter plugging near the wellbore. After injecting the biosurfactant, all four wells saw increases in daily oil production rates, with one well's rate doubling from 3.1 to 10.8 barrels of oil per day.

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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
Application of BERO™ Biosurfactant in Yanchang Oilfield and Its Effect
China has relatively mature development and steady production technology for
middle- and high-permeability reservoirs. However, as for low-and ultra
low-permeability reservoirs, oilfield operators face the challenges of slowing
down natural depletion, realizing sustainable steady production of oil wells and
gaining high final recovery rate and economic benefit. Yanchang Oilfield is
located in Ordos Basin and the reserves of ultra low-permeability reservoirs
account for more than 50%. Since such reservoirs have high permeating
resistance and poor formation communication, they are typical complicated oil
and gas reservoirs which are mainly characterized by low porosity, low
permeability and low production and are difficult for recovery.
Application of BERO™ Biosurfactant in Yanchang Oilfield Jingbian Oil
Production Plant and Its Effect
Jingbian Oil Production Plant has been using fracturing method to improve
recovery rate for a long time, but when fracturing method is applied in ultra
low-permeability reservoirs, there is a potential problem that fracturing fluid
flows back difficultly and residual fracturing fluid in reservoir fractures will
cause fluid plugging and lower the permeability of fractures; in addition, the
residual fracturing fluid will result in clay mineral expansion and particle
migration and cause great damage to the reservoirs. Under the condition that
detailed data on Well 45054 and Well 41094 of Yanchang Oilfield Jingbian Oil
Production Plant cannot be acquired, our company only could combine the
data of adjacent wells and calculate based on actual condition and data of
adjacent wells and then applied 1.15m3 of BERO™ biosurfactant in Well
41094 and 1.05m3 of BERO™ biosurfactant in Well 45054.

2. www.zfatech.com
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
After the use of BERO™ biosurfactant, daily liquid production of Well 41094
increased from 8.2 bbls to 18.9 bbls, daily oil production increased from 2.8
BOPD to 8.6 BOPD and water increased from 5.4 BWPD to 10.3 BWPD and
total production increased by 208%.
The construction of Well 45054 was carried out under the condition that water
cut has reached 100% (which means oilfield depletion); after the use of

3. www.zfatech.com
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
BERO™ biosurfactant, daily liquid production of Well 45054 increased from
3.7 bbls to 25.2 bbls, daily oil production increased from 0 BOPD to 8.6 BOPD
and water increased from 3.7 BWPD to 16.6 BWPD, thus enable this well to
bounce back. Through one year’s development, the daily liquid production of
this well maintained at 21.6 bbls, water 13 bbls and oil production 8.6 bbls,
indicating that this well maintained at high production stimulation level.
As of July 2007, the crude oil production of these two wells has increased by
5184 bbls on a cumulative basis.
Application of BERO™ Biosurfactant in Yanchang Oilfield Zhiluo Oil
Production Plant and Its Effect
Hu 85, Hu 86 Cong 3, Zhang 228 Cong 2 and Zhang 279 Cong 1 wells of
Yanchang Oilfield Zhiluo Oil Production,analysis result shows that these wells
have sufficient formation energy and production reduction of these wellsare
mainly caused by high wax content of polymers and crude oil and the plugging
of near-wellbore area caused by well flushing conducted recently. BERO™
biosurfactant is characterized in that it has strong ability in releasing
hydrocarbon (oil) on all solid surfaces, is a non-acidizing plugging removal
agent and will not cause secondary contamination to the formation and or
disturb crude oil dehydration and sewage treatment system, so it is used for
full plugging removal according to the production need and the requirements of
geological solution of Hu 85, Hu 86 Cong 3, Zhang 228 Cong 2 and Zhang 279
Cong 1 wells of Yanchang Oilfield Zhiluo Oil Production Plant.
In September 2012, our company conducted plugging removal tests by using
BERO™ biosurfactant on these wells, effectively removed the organic plug of
test wells and restored the oil flowing channels of production wells. The
treatment result is as follows:

4. www.zfatech.com
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
As for Well Hu 85, the analysis result shows that the main reason for
production reduction is the plugging of the near-wellbore zone caused by
organic matters such as wax and asphalt contained in crude oil. In September
2012, BERO™ biosurfactant was mixed with formation water and injected in
Well Hu 85 to remove plugging and stimulate production and the temperature
of the injection fluid was above 122℉. During construction, pressure rose from
0 psi to 1450 psi.
After shut-in for 5 days, Well Hu 85 resumed production and then its
production greatly increased. Its daily oil production increased from 0.9 BOPD
to 4.3 BOPD.

5. www.zfatech.com
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
As for Well Hu 86 Cong 3, the analysis result shows that the main reason for
production reduction is the plugging of the near-wellbore zone caused by
organic matters such as wax and asphalt contained in crude oil. In September
2012, BERO™ biosurfactant was mixed with formation water and injected in
Well Hu 86 Cong 3 to remove plugging and stimulate production and the
temperature of the injection fluid was above 122℉. During construction,
pressure rose from 0 psi to 1450 psi.
After shut-in for 5 days, Well Hu 86 Cong 3 resumed production and then its
production greatly increased. Its daily oil production increased from 1.9 BOPD
to 5.8 BOPD.

6. www.zfatech.com
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
As for Well Zhang 228 Cong 2, the analysis result shows that the main reason
for production reduction is the plugging of the near-wellbore zone caused by
organic matters such as wax and asphalt contained in crude oil. In September
2012, BERO™ biosurfactant was mixed with formation water and injected in
Well Zhang 228 Cong 2 to remove plugging and stimulate production and the
temperature of the injection fluid was above 122℉. During construction,
pressure rose from 0 psi to 1450 psi.
After shut-in for 5 days, Well Zhang 228 Cong 2 resumed production and then
its production greatly increased. Its daily oil production increased from 3.1
BOPD to 10.8 BOPD.

7. www.zfatech.com
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
As for Well Zhang 279 Cong 1, the analysis result shows that the main reason
for production reduction is the plugging of the near-wellbore zone caused by
organic matters such as wax and asphalt contained in crude oil. In September
2012, BERO™ biosurfactant was mixed with formation water and injected in
Well Zhang 279 Cong 1 to remove plugging and stimulate production and the
temperature of the injection fluid was above 122℉. During construction,
pressure rose from 0 psi to 1450 psi.
After shut-in for 5 days, Well Zhang 279 Cong 1 resumed production and then
its production greatly increased. Its daily oil production increased from 11.7
BOPD to 17.4 BOPD.