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Case Studies
This case study from Petrotrin-Trinmar S.B.U. and was reprinted with permission.
Lab Project Report:
The following information is the results from the use of E.C. 106-viscosity reducer in down hole applications.E.C.106 Viscosity Reducer was applied by injection (Bull-headed) and shut in for a period of twenty-four (24) hours.
Date: 22nd August 2002
From: Murchisson John, E.A.R.T.H. Company limited
Subject: The down hole use of E.C. 106
Account Type: Oil Company – Petrotrin Trinmar S.B.U., Trinidad
Product Used: E.C. 106 “ Viscosity Reducer
Number of wells treated: One (1)
E.C. 106 was bull-headed down the tubing and displaced to a radius of three feet (3’). Petrotrin-Trinmar S.B.U. provided all technical information on the well before treating the wells. The following is an example of the information needed for each application.
Original production Volume production to date Well head pressure Depth of well Casing size and tubing Gravity of the crude Bottom hole temperature Depth of production zones Water content by percentage Salt content
IMPORTANT INFORMATION
Customer name and Location: Petrotrin-Trinmar S.B.U.
Date: August 22nd, 2002
Actual Production: On 21st August 2002
Well information provided by: Petrotrin-Trinmar S.B.U.
Treatment: A straight pill of Thirty-nine (39) bbls of EC-106 was pumped followed by twenty –five (25) barrels of 2% KCL brine to displace the tubing. The well was taken off-line for twenty-four hours.
Results: The well was put back into production at 58 bbls per day, in the first day of production, it increased further to 140 barrels in the second day an increase of 519 %.For the next three days the well maintained a production rate of 110 bfpd. The well ‘sanded in’ and it’s production fell to 22 bfpd fines migrated through the gravel pack.
Customer Comments: When producing wells treated with EC-106 contingencies must be put in place to prevent the wells from surging. The increased field velocities will destroy the stability of any sand bridging behind the casing end therefore, increasing sand migration into the well bore.
Venezuelan laboratory results
| Well: |
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VLE 1357 |
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| Sample Volume (ml): |
100 |
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| Enzyme Volume (ml): |
1 |
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| Laboratory: |
CleanZyme |
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| Report No.: |
01CZL-BST-001 |
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| Date: |
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15-Feb-01 |
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| Analysis |
Unit |
Results |
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Test Method |
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Before Treatment |
After Treatment |
| Kinematic Viscosity @100°F (cSt) |
cSt |
32.66 |
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3.27 |
ASTM D-445 |
| Viscosity variation |
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| Emulsion (% vol) |
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% vol |
10.1 |
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6.8 |
ASTM D-4006 |
| Emulsion variation |
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| Well: |
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VLE 1135 |
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| Sample Volume (ml): |
100 |
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| Enzyme Volume (ml): |
1 |
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| Laboratory: |
CleanZyme |
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| Report No.: |
01CZL-BST-001 |
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| Date: |
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15-Feb-01 |
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| Analysis |
Unit |
Results |
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Test Method |
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Before Treatment |
After Treatment |
| Kinematic Viscosity @100°F (cSt) |
cSt |
71.85 |
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1.74 |
ASTM D-445 |
| Viscosity variation |
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| Emulsion (% vol) |
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% vol |
18.5 |
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12 |
ASTM D-4006 |
| Emulsion variation |
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| Well: |
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LRF 0110 |
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| Sample Volume (ml): |
100 |
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| Enzyme Volume (ml): |
1 |
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| Laboratory: |
CleanZyme |
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| Report Nro.: |
01CZL-BST-001 |
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| Date: |
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15-Feb-01 |
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| Analysis |
Unit |
Results |
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Test Method |
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Before Treatment |
After Treatment |
| Kinematic Viscosity @100°F (cSt) |
cSt |
5.88 |
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3.27 |
ASTM D-445 |
| Viscosity variation |
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| Emulsion (% vol) |
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% vol |
18.9 |
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9 |
ASTM D-4006 |
| Emulsion variation |
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