MATEC Web Conf.
Volume 356, 20222022 2nd International Conference on Advanced Energy, Power and Electrical Engineering (AEPEE2022)
|Number of page(s)||4|
|Published online||14 March 2022|
Application of flexible colloid-fiber compound plugging technology in oil and gas wells with large differential pressure in the East China Sea
CNOOC (China) Co., LTD. Shanghai Branch, Shanghai, 200030, China;
2 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China.
* Corresponding author: email@example.com
In order to solve the contradiction between the safety requirements of well control in the upper reservoir and the loss of kill fluid in the lower reservoir, the idea of “compound plugging technology” was proposed to solve the abnormal pressure inversion phenomenon of “the co-existence of blowout and lost circulation” with large interlayer pressure difference. Flexible colloidal particle-fiber composite temporary plugging fluid was developed. The plugging layer formed by the temporary plugging fluid of flexible rubber fiber can withstand the positive pressure difference of more than 40 MPa, and there is no overflow and leakage. The advantages of compound temporary plugging fluid under large differential pressure are verified and it has a good application prospect.
Key words: Flexible colloidal particles / Compound temporary plugging / Large differential pressure / Reservoir protection
© The Authors, published by EDP Sciences, 2022
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