中图分类号：TE348 文献标识码：A DOI：10.12473/CPM.202406051

LiDajian，Wu Chunsheng，Cui Ziyue，etal.Testofthe external-casing optical fiberintellgent completion technologyforhorizontalwels in bottom-waterreservoirs[J].China Petroleum Machinery，2025，53（7）：129-135.

Test of the External-Casing Optical Fiber Intelligent Completion Technology for Horizontal Wells in Bottom-Water Reservoirs

Li Dajian ^1，2 Wu Chunsheng1.²Cui Ziyue³Wang Xu4Yang Haitao ^1，2 Gao Yu1，² （1.Oilamp;Gas TechnologyResearchInstitute，PetroChinaChangqingOilfieldCompany；2.NationalEngineeringLaboratoryfor ExploratinandDevelopmentofLowPermeabilityOilamp;GasFields；3.ExplorationDivision，PetroChinaChangqingOilfeldCompany;4. No.9 Oil ProductionPlant，PetroChina Changqing Oilfield Company）

Abstract：In the production process of horizontal wels in botom-water reservoirs，water production and flooding caused bybotom-water coningare keyfactors restricting the development effctof horizontal wells.There is an urgent need to figure out efective techniques of water control in the whole life cycleof bottom-water reservoirs.In Changqing Oilfield，water productionand flooding occur in horizontal wels for developing bottom-water reservoirs.To solve these problems，for purpose of the integration ofperformance monitoring and control at producing intervals，following the idea of intelligent completion of oil wells，and combining with the conditions of well completions，a solutionof water control during intellgent completion was proposed，which incorporates the external-casing distributed optical fiber for permanent monitoring on production performanceat the producing interval and the switchable sliding sleeve ofcasing for performance control atthe producing interval.A string consisting of external-casing distributed optical fiber + switchable sliding sleeve of casing + permanent downhole gauge was designed innovatively，and supporting keytoos were designedand manufactured.Thus，anew intelligent completion technologyforhorizontal wells inbotom-waterreservoirs was formed，and it has been testedat Well Chi97H The results show that the use of the external-casing distributedoptical fiber for continuous，real-time monitoring and interpretation of the temperature，acoustic vibration and downhole pressure signals ofthe whole welbore，especiallthe producing interval，helps fullunderstandthe performanceatthe producing interval andlocate the waterproducing interval，sothat the sliding sleeveofcasing atthecorresponding interval is closed to resume the well productivity.In this way，the water-flooded wels inbotom-water reservoirscan beeffectivelycontrolled.The study demonstrates thattheexternal-casingopticalfiber intellgentcompletion technology for horizontal wels is an ffective option to realize the water control in bottom-water reservoirs.

Keywords： bottom-water reservoir； horizontal well; intellgent completion;switchable sliding sleeve；distributed fiber

0 引言

边底水油藏是油田开发的一种重要油藏类型，受到开发油层构造高度、边底水层位置、油井生产制度等因素影响，生产过程中常伴随边底水抬升、底水锥进，导致油井过早见水甚至水淹，严重影响了油井产能发挥，降低了油藏采收率与开发效益，亟需建立相适应的技术手段进行干涉治理。

为有效解决边底水油藏开发油井过早见水问题，近年来国内外油田、油服公司开展了不同形式的技术攻关试验与探索。一方面主要通过开展不同类型工艺措施进行被动治理，如化学堵剂（凝胶堵剂 + 纳米高强堵剂）堵底水、注入化学软隔板封底水、底水油藏气顶驱控底水以及液控智能自适应控流量装置2、优化生产制度的方式抑制底水过快锥进突破等，在矿场试验取得了初步效果。但受到油藏特征、油井完井方式以及不同井况特征影响，目前尚处于试验应用阶段，还没有达到技术成熟、推广应用的程度。另一方面，在充分调研智能完井技术原理[4-5]、关键技术[6]、技术方向[、技术思路的基础上[8]，进行主动防治。主要通过研制配套关键工具，在井筒内构建实时监测系统、产层段控制系统4，依据产层段产出类型、产出特征监测与解释分析，判识出水层段，通过产层段流量无级调控，达到稳油控水、高效生产的目的。技术调研表明，针对边底水油藏主动防治智能完井工艺技术，主要基于在井筒内建立监测系统、控制系统的方式实现工艺目的。……