Study on Temperature-Controlled Liquid-Solid Phase Change Mud Loss Control System and Mud Loss Control with In-situ Self-Generated Bridging Particles

WANG Jiaqin; YANG Yanjie; ZHAO Cheng; LIU Shanghao; BAO Dan; ZHANG Peng

doi:10.12358/j.issn.1001-5620.2024.05.004

Volume 41 Issue 5

Nov. 2024

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Article Navigation > DRILLING FLUID & COMPLETION FLUID > 2024 > 41(5): 582-588

WANG Jiaqin, YANG Yanjie, ZHAO Cheng, et al.Study on temperature-controlled liquid-solid phase change mud loss control system and mud loss control with in-situ self-generated bridging particles[J]. Drilling Fluid & Completion Fluid，2024, 41（5）：582-588 doi: 10.12358/j.issn.1001-5620.2024.05.004

Citation:

WANG Jiaqin, YANG Yanjie, ZHAO Cheng, et al.Study on temperature-controlled liquid-solid phase change mud loss control system and mud loss control with in-situ self-generated bridging particles[J]. Drilling Fluid & Completion Fluid，2024, 41（5）：582-588 doi: 10.12358/j.issn.1001-5620.2024.05.004

Citation:

WANG Jiaqin, YANG Yanjie, ZHAO Cheng, et al.Study on temperature-controlled liquid-solid phase change mud loss control system and mud loss control with in-situ self-generated bridging particles[J]. Drilling Fluid & Completion Fluid，2024, 41（5）：582-588 doi: 10.12358/j.issn.1001-5620.2024.05.004

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Study on Temperature-Controlled Liquid-Solid Phase Change Mud Loss Control System and Mud Loss Control with In-situ Self-Generated Bridging Particles

doi: 10.12358/j.issn.1001-5620.2024.05.004

WANG Jiaqin^{1, 2
,},
YANG Yanjie^{1, 2},
ZHAO Cheng³,
LIU Shanghao^{1, 2},
BAO Dan^{1, 2
,
,},
ZHANG Peng^{1, 2}

1.
School of Chemistry and Chemical Engineering, Chongqing University of Science & Technology, Chongqing 401331
2.
Chongqing Oil and Gas Field Chemical Engineering Technology Research Center, Chongqing 401331
3.
PetroChina Dagang Oilfield Petroleum Engineering Researc，Tianjin 300280

Received Date: 2024-03-25
Rev Recd Date: 2024-06-03
Publish Date: 2024-11-07

Abstract

Abstract

Mud losses into fractures are a technical difficulty frequently encountered in drilling operation. The technical bottleneck is the poor matching between the traditional bridging lost circulation materials and the sizes of the channels through which the mud is lost, and this generally leads to repeated mud losses at the same depth. To deal with this problem, a temperature controlled liquid-solid phase change lost circulation control system is developed based on the principles of thermosetting resin emulsification and high-temperature crosslinking polymerization. This system can adaptively enter fractures of different openings, and form in-situ inside the fractures high-strength particles with a wide size distribution to control the mud losses under the action of the high temperatures in the mud loss zones. In laboratory studies, the structures of the bridging particles generated in-situ inside the fractures are characterized, the mechanical properties and performance of the bridging particles to plug the fractures are tested. The results of the studies show that in the temperature-controlled liquid-solid phase change lost circulation control system, the contents of the high molecular weight resin, the emulsifier, the dispersant, the crosslinking agent and the distilled water are 37%, 5.2%, 0.07%, 25.9% and 31.83%, respectively. This system can in-situ generate particles with sizes distributed between 0.1 mm and 5 mm at temperatures between 50 ℃ and 90 ℃ inside the mud loss zones. After being aged at 120 ℃, the D₉₀ degrading rate of the bridging particles under 60 MPa is only 0.4%, indicating that the system has high compressive strength. Using one temperature-controlled liquid-solid phase change lost circulation control system, fractures with openings between 1 mm and 5 mm can all be plugged, and the plugged fractures can bear pressures up to10 MPa. This system can be used to realize adaptive plugging, and is expected to solve the difficulties in controlling mud losses into fractures of unknown openings.
- Mud loss into fractured formation,
- Liquid-solid phase change,
- In-situ self-generated particle,
- Compressive strength,
- Adaptive plugging

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References(26)

References

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Study on Temperature-Controlled Liquid-Solid Phase Change Mud Loss Control System and Mud Loss Control with In-situ Self-Generated Bridging Particles

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