控水防砂一体化工艺技术研究与应用

Research and application of integrated water and sand control technology

海上油田疏松砂岩油藏水平井开发过程中,由于底水锥进、跟趾效应等原因,含水率的快速上升加剧了水平井的出砂,迫切需要在完井阶段实施控水与防砂综合性防治技术。本文以海上油田A1井为目标井,针对疏松砂岩油藏出砂和高含水问题,介绍控流装置与防砂颗粒相结合的控水防砂一体化工艺技术,分析自适应控流装置与颗粒型材料阻流原理并开展了现场应用。A1井在采用控水防砂一体化工艺技术后,累积增产4万m^(3)以上,从2018年投产至2021年12月无出砂现象,表明该工艺技术可有效提高疏松砂岩油藏的防砂有效性及控水工艺效果,对海上油田水平井控水防砂具有一定的推广应用价值。

During the development of horizontal wells in unconsolidated sandstone reservoirs of offshore oilfields,the rapid rise in water cut aggravates the sand production of horizontal wells due to bottom water coning,heel-to-toe effect and so on,posing an urgent need for implementing the comprehensive water and sand control technology in the completion stage.Taking Well A1in the offshore oilfield as the target well,aiming at the problems of sand production and high water cut in unconsolidated sandstone reservoirs,this paper introduces the integrated water and sand control technology combining flow control device with sand control particles,analyzes the adaptive flow control device and the choking mechanism of granular materials,and implement the field applications.After the application of integrated water and sand control technology in Well A1,the cumulative production was increased by more than40000 m^(3),and there was no sand produced from the production startup in 2018 to December 2021,indicating that this technology can effectively improve the sand control effectiveness and water control efficiency of unconsolidated sandstone reservoirs.This technology shows a certain popularization value in water and sand control completion of horizontal wells in offshore oilfields.