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渭北油田WB2井区长3致密油藏开发方式探讨

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摘要 渭北油田WB2井区位于鄂尔多斯盆地南部,长3储集层致密,孔隙结构复杂,储层微裂缝较发育,地层压力系数低,油水粘度比较大,开发难度大。WB2井区长3致密油藏2013年开始进行规模水平井多段压裂后弹性能量开发、直注平采井网注水开发、直注直采矩形井网注水开发、直注直采井网注CO_2非混相驱开发及微生物吞吐开发试验。开发试验表明水平井多段分段压裂后弹性能量投产初产较高,但递减快;直井多段超前注水有助于提高水平井初期产能并减缓水平井递减;直注直采注水开发水淹油井比例高,注水开发过程中应合理控制注水井注水压力、注水强度及油井压裂规模;注CO_2非混相驱及微生物吞吐对提高WB2井区长3致密油藏采收率效果不明显。
出处 《中国石油和化工标准与质量》 2017年第9期56-57,共2页 China Petroleum and Chemical Standard and Quality
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