吐哈油田牛东火山岩油藏水平井重复压裂技术

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中图分类号：TE357 文献标志码：A 文章编号：1000-7393（2025）-02-0197-10

Abstract：Toaddressthechalengesofrapidproductiondeclineandlowrecoveryinhorzontalwelsaftervolumetricfracturingin NiudongvolcanicunconventionalreservoirsofTuha Oilfield，thisstudyinnovativelyproposesamulti-stagediversionre-fracturing technology integrating "subdivided perforation + pre-fracturing energy replenishment + enlarged stimulated reservoir volume"， along with precisestagedre-fracturing techniques.Systematicresearchonenergystoragemechanismsandreservoirfacabilityevaluation hasoptimizedkeyparametersincluding energy-caryingmedia，injection volume，diversionstages，anddiverterparticlesize distribution.Amprehsietchicalstmatabldcoporatigelltealeletioncieiabiddtio pre-fracturingnergyijetion，full-wellulti-stagedversio，andpreisestaged-facturing.Fieldtestsdug24o15 wells in Niudong Block achieved 100% operational success with 86.7% effectiveness， delivering average incremental production of 4.7t/d per well（cumulative832t）andanatractiveinput-outputratioof1.18.Thissuccessful practice providesareplicable techical templateandvaluable feldexperienceforehancing productionandrecovery inunderperforminghorzontalwelsofTuhaOilfield's unconventional reservoirs.

Keywords： volcanicrock；horizontal wellre-fracturing;multi-stagediversion；precisionstaging;energyreplenishment;Tuha Oilfield

0 引言

吐哈油田牛东区块 C2k 储层物性较差，孔隙结构复杂，储层非均质性明显，符合非常规致密油藏基本特征，采取直井常规改造技术手段难以取得有效的增产目的。（剩余20648字）