Based on the basic data of Well GDX2-213 in Gudao Oilfield, the historical data of perforation, the brief history of previous operations and the production situation, it is initially determined that sand blockage occurred in the near-well area and within the annular space between the filter sand pipe and the casing. At the same time, there may be certain scale blockage and polymer blockage. The corresponding unblocking construction plan was compiled, and the combination of downhole tools was determined:
Spring bottom valve generator (1188m), generator (1185m), 73mm tool oil pipe to wellhead.
Pump pressure before unblocking: 10MPa; After completion, pump pressure: 8MPa; A total of 97 cubic meters of treated liquid was used. Construction period: 5 hours.
Oil is coming out from the bottom of the well
Sand comes out from the bottom of the well
