| Summary: | The small well spacing block was encrypted and adjusted three times from 2009 to 2012, with the injection and extraction well spacing shortened from 250m to 106m, and the proportion of small well spacing wells accounting for 71.3% of the water drive, mainly distributed in Area A, Area B and Area C. The current well network density in the small well spacing area is 90.7 wells/Km2, the formation pressure is 9.12Mpa, there are more exploited layers vertically, the contradiction between layers and within layers is prominent, and there are large differences in oil formation mobilization, resulting in a rapid rise in water content. Through fine geological research, the focus is on improving the use of thin and poor oil formations, controlling the rate of water-bearing rise and restoring the energy of the formation, and constantly exploring effective methods for “controlling water-bearing and decreasing” during the period of exceptionally high water-bearing, so as to improve the development effect of the block and achieve the purpose of stabilizing oil and controlling water.
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