Drilling fluid system name

Water plugging removal system

Matching core finishing agent

Antihypertensive drainage aid HWDA    Water proof lock agent HAR    Clay stabilizer HTW     Complex organic acids HWCA    Corrosion inhibitor HWSJ-2

System characteristics

1、Organic deblocking solution: It can remove organic blockage in the near-well zone and reduce water saturation;

2、Depressurization helps drain water lock fluid: It can change reservoir wettability and reduce water saturation;

3、Inorganic deblocking solution: It can release inorganic blockage and reform reservoir;

4、Killing fluid: It can  prevent and release water lock water sensitivity damage.

Application situation

It has been successfully applied in wells of  WZ12-1-B20, WZ6-10-A1S1 and WZ12-2-A1 in Weizhou oilfield, which especially not only successfully blocked the four sections of WZ12-1-B20 well, but also the oil production has increased from 2m3/d before the plugging to 654m3/d, while the stable production has been significantly blocked.

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