baker hughes - primestar fracturing fluid provided …...baker hughes for a frac and pack solution....
TRANSCRIPT
An operator in the Deepwater trend, Gulf of Mexico (GOM) needed a weighted fracturing fluid to help counter high bottomhole pressures in a large six-zone completion. Since the job had to be pumped in one trip, the operator asked Baker Hughes for a frac and pack solution.
The first requirement was to develop a weighted fracture fluid for the completion. Starting with the Baker Hughes PrimeStar™ family of fracturing fluids, which was designed for use in deepwater well stimulation applications, staff at the Baker Hughes Technology Center in Tomball, Texas, analyzed well data and the operational parameters of the stimulation.
Working with that data, engineers developed a recipe and breaker package that would meet both the well conditions and the customer’s time requirements. The fluid was a 10.5-lbm/gal (1.25-kg/l) sodium bromide fracturing fluid that would allow for 120 minutes of stability above
200 cP and give a complete break within 30 minutes of the desired stability time.
The job was pumped from the Baker Hughes Blue Dolphin stimulation vessel. The technology and enhanced capabilities of the Blue Dolphin provided room for enough proppant and Baker Hughes chemicals for all six zones of this completion with no planned trips to the dock to resupply. Since contamination was a potential problem, a flushing plan for the dockside facilities, supply vessels, and the Blue Dolphin was implemented before loading and during operation to keep all equipment and vessels clean to prevent contamination.
The vessel carried 3 million lbm (85048 kg) of total proppant, including a combination of two different heavyweight proppants, along with 78,000 gal (295262 l) and 24,000 lbm (10886 kg) of fracturing and acidizing chemicals. The Blue Dolphin carried the maximum amount
PrimeStar Fracturing Fluid Provided Frac and Pack Solution for Deepwater OperationsLargest successful multizone frac and pack treatment in GOM
Benefits nn Developed and applied a custom-engineered fracturing fluid for deepwater application
nn Completed a six-zone completion in one trip
Background and challenges nn Deepwater well, Gulf of Mexico
nn Six-zone completion requiring weighted fracturing fluid pumped in one trip
nn Weighted fracturing fluids
– are sensitive to contaminants in water
– have to be very stable for at least two hours
nn Develop fluid to meet customer requirements
nn Implement a complex and demanding pumping operation
Baker Hughes solution and resultsnn Recommended PrimeStar family of fracturing fluids
nn Incorporated research and development program at the Baker Hughes Technology Center in Tomball, Texas
nn Utilized Baker Hughes Blue Dolphin
nn Engineered and tested breaker package to meet customer fracturing requirements
nn Developed and implemented aggressive plan to eliminate dockside and onboard contamination sources
CASE HISTORY| bakerhughes.com
Disclaimer of Liability: This information is provided for general information purposes only and is believed to be accurate as of the date hereof; however, Baker Hughes Incorporated and its affiliates do not make any warranties or representations of any kind regarding the information and disclaim all express and implied warranties or representations to the fullest extent permissible by law, including those of merchantability, fitness for a particular purpose or use, title, non-infringement, accuracy, correctness or completeness of the information provided herein. All information is furnished “as is” and without any license to distribute. The user agrees to assume all liabilities related to the use of or reliance on such information. BAKER HUGHES INCORPORATED AND ITS AFFILIATES SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, PUNITIVE, EXEMPLARY OR CONSEQUENTIAL DAMAGES FROM ANY CAUSE WHATSOEVER INCLUDING BUT NOT LIMITED TO ITS NEGLIGENCE.
© 2014 Baker Hughes Incorporated. All rights reserved. 39462 02/2014
of base brine, while three additional supply vessels carried 37,000 bbl (5882 m3) of 10.5- ppg sodium bromide base brine.
The Baker Hughes PrimeStar fluid met all the operator’s expectations on all six zones, with no fluid issues during the job. Since the gel could be mixed on the fly, the operator didn’t have any expense for unused fluid. The efforts of the Baker Hughes Technology Center and vessel operations made for
an easy transition from regular KCl-based brines to the more complicated NaBr-based fracturing fluid.
During the 24 days the Blue Dolphin was on location, the crew managed simultaneous logistical issues of vessel-to-vessel transfers of fuel, brine, water, and chemicals. The vessel was staffed with an additional crew to perform maintenance on the equipment between each zone. This was particularly important part of
the project since harsh material was being pumped in roughly 500,000 lb increments, more than 35 bpm, and at more than 8,000 psi operating pressures.
The fracturing fluid and vessel operations met all the operator’s goals and earned Baker Hughes praise for the high quality of the overall job.
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Viscosity
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BJ Blue Dolphin ( STBD 1+ PORT 2 + 12.5 gpt GW -3L) + 2 gpt NE-945 + 2 gpt Flo Back 30 + 2.5 - gpt 25% Caustic + 1 + 2.5 gpt XLW -24 + .25 gpt XLW -32+ 1 gpt GBB -1
Shear Rate Viscosity 1 Sample Temp
Vessel Break Test During Job
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Viscosity
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BJ Blue Dolphin ( Baseline - 10.5# NaBr + 12.5 gpt GW -3LE) + .25gpt Alpha 125 + 2 gpt NE-945 + 2 gpt Flo Back 30 + 2.5 gpt 25% Caustic+ 2.5 gpt + XLW -24 + .25 XLW 32
Shear Rate Viscosity Sample Temp
Temperature
Vessel Baseline Test During Job
Blue Dolphin (Baseline - PrimeStar 5000 in 10.5 ppg NaBR) Alpha 125 + 2 gpt NE-945 + 2 gpt Flo Back 30
Blue Dolphin (Baseline - PrimeStar 5000 in 10.5 ppg NaBR) Alpha 125 + 2 gpt NE-945 + 2 gpt Flo Back 30
CASE HISTORY