Drilling fluid system name

Complexing water gel temporary plugging system

Matching core finishing agent

Suspension viscosity increasing agent HPV    Gelling agent HJN    Auxiliary gelling agent HFJ    Inorganic hydrogel HIG-a/HIG-b    Complexing agent HLH-1

System characteristics

1、The anti swelling property is good and the anti swelling rate is 99.5%.

2、It has  good water lock ability and the air liquid surface tension is 20.6mN/m;

3、It has strong pressure sealing;

4、The self reflux ability after plugging is strong;

5、The compatibility is good;

6、The reservoir is well protected;

7、It has good performance of safety and environmental protection.

Application situation

“Complex water hydrogel temporary plugging technology” is applied in the well repair operation of Dongfang 1-1-B2h well, which has better sealing and reservoir protection effect, while the actual production increase after the workover is up to 61,700 square meters, also it has achieved good workover effect.

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