海上油田分层防砂分层注水高效集成技术

针对目前海上分层防砂分层注水有效期短、施工周期长、作业成本高的问题，研究了新型海上油田分层防砂分层注水高效集成工艺。通过采用穿越型悬挂丢手封隔器，能够同时连接防砂管柱和注水管柱，采用小直径液控压缩四胶筒分层封隔器，同时实现分层防砂封隔器的坐封以及后期注水管柱的精细分层。该技术的防砂管柱与注水管柱一趟下入，节省施工时间一半以上。穿越型悬挂封隔器的可溶丢手支撑套溶解后，能够实现防砂管柱与注水管柱的独立检修，延长防砂管柱的使用寿命，降低作业成本。该技术已在胜利海上油田成功应用10井次，最大施工井斜65°，工具最大下深3 780 m，工作最大压差10 MPa，施工成功率100%，分层合格率100%，有效提高了海上水驱油藏的开发程度。

An efficient integration technology of separate-layer sand control and separate-layer water injection for offshore oilfields

At present, offshore separate-layer sand control and separate-layer water injection face short validity, long construction period and high operation cost. To solve these problems, this paper researched a new efficient integration technology of separate-layer sand control and separate-layer water injection for offshore oilfields. Crossing-type suspension release packer can connect sand control pipe string and water injection pipe string simultaneously, and small-diameter hydraulic compression four-rubber separate-layer packer can realize the setting of separate-layer sand control packer and the later fine stratification of water injection pipe string. By virtue of this technology, sand control pipe string and water injection pipe string are run into the hole in one trip, which saves the construction time more than 50%. After the soluble release support sleeve of crossing-type suspension packer is dissolved, sand control pipe string and water injection pipe string can be maintained independently, which extends the service life of sand control pipe string and reduce the operation cost. This technology has been successfully applied 10 well times in Shengli offshore oilfield with maximum hole deviation angle 65 °, maximum tool setting depth 3 780 m, maximum working pressure difference 10 MPa, construction success ratio 100% and stratification qualification rate 100%, and it effectively improves the development degree of offshore water flooding oil reservoirs.