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欠平衡井底欠压值设计新方法研究及应用

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摘要 在欠平衡钻井设计和施工过程中,井底欠压值的设计和控制是决定欠平衡钻井成败的关键因素,在目前行业标准和常规设计中考虑了地层3个压力剖面、井眼的力学稳定性、地面设备的控制能力以及储层的应力敏感特性,基本上满足了现场需求,但对于一些低渗且水敏性强的地层、凝析气井仅仅考虑上述约束条件还难以满足现场需要,针对这一问题,提出了一种欠平衡井底欠压值设计的新方法,在综合考虑以上条件的基础上,同时考虑了毛细管压力对储层伤害的影响、凝析油反凝析对储层伤害的影响,并给出了欠压值的设计流程。应用此方法在B区块油田MKSR-0002高温高压凝析气井进行了实际的设计和应用,施工完成后测试表皮系数-3.4,取得了良好的储层保护效果。
作者 秦疆
出处 《西部探矿工程》 CAS 2015年第12期55-57,60,共4页 West-China Exploration Engineering
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