B区块属A油田三类区块,油层埋藏较深,储层致密物性较差,采用300×300 m反九点法和450×160 m矩形井网布井,很难建立有效的驱动体系,油层蹩压严重。由于原井网不适应,导致该区开发效果较差,加密前区块平均单井日产油1.2 t。B区块加密成功对A油田三类区块二次加密调整有指导作用。 Block B belongs to the third type of Block A, with deep buried oil reservoirs and poor reservoir densities. It is difficult to establish an effective driving system using 300 × 300 m anti-nine-point method and 450 × 160 m rectangular well- The reservoir is badly laced. Due to the unfitness of the original well pattern, the development in this area was ineffective. The average single well daily oil production in the block before encryption was 1.2 t. The successful block B encryption has the guiding effect on the secondary encryption adjustment of the third type block in A field.