Application of flexible colloid-fiber compound plugging technology in oil and gas wells with large differential pressure in the East China Sea

MATEC Web of Conferences

卷:356

Ge Junrui¹  Li Sanxi¹  He Wei²  Zhang Yufei²  Niu Chengcheng² 

[1] CNOOC (China) Co., LTD. Shanghai Branch;

[2] State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University;

关键词: flexible colloidal particles;    compound temporary plugging;    large differential pressure;    reservoir protection;   

DOI  :  10.1051/matecconf/202235601011

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown