海上疏松砂岩储层压裂解堵裂缝规模优化设计方法Optimization Design of Fracture Scale for Fracturing and Plugging Removal in Offshore Unconsolidated Sandstone Reservoirs
郭小哲,刘全刚,王壮,王晓超,韩立杰,王锦林
摘要(Abstract):
针对受污染的海上疏松砂岩油井所需的最优压裂规模不确定问题,开展了不同裂缝长度和导流能力对油井生产的影响规律研究。采用油藏数值模拟和压裂效果分析手段,设计了裂缝规模优化计算方法。研究表明:污染程度对油井的影响明显大于污染半径,明确了短缝高导流能力的目标是削弱污染程度;裂缝半长大于污染区范围后油井生产具有含水上升趋势,裂缝半长优化为污染半径;储层渗透率越高,裂缝导流能力增大带来的油井提液幅度越趋于平缓,所需导流能力相对越小。
关键词(KeyWords): 水力压裂;解堵;压裂规模;储层污染;疏松砂岩;海上油田
基金项目(Foundation): 中海油能源发展工程技术公司项目“疏松砂岩储层压裂特征研究”(ZX2021ZCGCF5997)
作者(Author): 郭小哲,刘全刚,王壮,王晓超,韩立杰,王锦林
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