摘要
以油藏数值模拟为手段对渤１９断块的水驱进行综合评价，结果表明：渤１９断块目前各油层采出状况很不均衡，主力油层“顶端优势”加剧——采出程度高、含水高，原主力油层的剩余储量仍然保持其主力地位。基于目前井网，对层系的数值模拟预测的水驱采收率仅为３５．４％。在水驱研究的基础上，对该断块进行聚合物驱和交联聚合物驱数值模拟优化研究，结果表明：以第一段塞０．０５ＰＶ（聚合物浓度２０００ｍｇ／Ｌ，交联剂浓度８００ｍｇ／Ｌ）加第二段塞０．２０ＰＶ（聚合物浓度１５００ｍｇ／Ｌ，交联剂浓度６００ｍｇ／Ｌ）的交联聚合物驱为最优方案，最优方案下的吨聚合物增油为８６ｔ，可提高原油采收率８．４２％。
Waterflooding evaluation of Bo 19 block has been performed by means of numerical simulation.It has been shown that recovery is uneven for all the productive layers,major layers become deterioated with high recovery and high water cut,major productive layers will remain its orignal status from current reserves left.Water fiooding recovery will be 35.4% based on the current recovery means and well pattern. Polymer and cross linked polymer flooding simulation have been performed with chemical flooding simulator after waterflooding evaluation, and optimum scheme has been obtained, 86 ton incremental oil per ton polymer and 8.42% of additional oil recovery can be reached with 0.05PV slug (2000mg/L polymer and 800mg/L cross linked agent) plus 0.2 PV slug (1500mg/L polymer and 600 mg/L cross linked agent).
