In May 3rd, the production daily of the two production plant of Tahe oil field showed that from 1 to April this year, there was a total of 158 flooding in 104 wells, with a cumulative water injection of 648 thousand and 100 cubic meters, 210 thousand and 500 tons of oil production, 99 thousand and 700 tons of oil, and a 3.27 percentage point reduction by natural decline.

Tahe oilfield is a carbonate reservoir. It has the characteristics of deep buried reservoir, strong reservoir heterogeneity and poor distribution of oil and water. At present, some oil wells are running down due to energy decline, resulting in a rapid decline in natural production, and some wells are also closed due to insufficient liquid supply. To this end, the plant is based on the sewn hole unit, and takes the water energy as a breakthrough. Under the premise of the application of the single well water injection for oil technology, the water injection practice of the seam hole unit is vigorously carried out. At the same time, on the basis of analyzing and summing up the technology of "water injection for oil" in the past, increasing the production and production and taking the "waterway" has broad prospects.

In particular, since March 1st this year, since the northwest oil field carried out "180 days to increase storage and labor competition" in the northwest oil field, the plant further intensified water injection, increased the daily water injection from 4791 cubic meters to 6800 cubic meters, and increased the daily average oil production from 1705 tons to 1950 tons, and improved the injection and production parameters according to the characteristics of injection and production to improve the effect of water injection. In the third round of water injection, TH12415 increased from 4007 cubic meters to 13057 cubic meters, the 40 tons of Nissan crude oil rose to 82 tons, and the production period increased by 1460 tons. At the same time, the geological technicians of the factory actively explored the low efficiency wells and recovered the potential of water injection and recovery. The daily liquid of the AD22 well gradually dropped to 15 tons, and the water flooding was difficult, and the water flooding was difficult, and the water flooding was difficult, and the water flooding was difficult, and the water flooding was difficult, and the water injection was difficult, and the water injection was difficult, and the water injection was difficult, and the water injection was difficult, and the water injection was difficult, and the water injection is difficult, and the water flooding is difficult, and the water injection is difficult, and the water flooding is difficult and difficult. It is found that the permeability of the near well is low. After the implementation of sand and sand acidification in March 3rd, the daily oil recovery to 44 tons has been recovered. Up to now, the well has accumulated 1545 tons of crude oil.