汪道兵;周福建;葛洪魁;刘雄飞;石阳;Sergio Zlotnik;张薇;

• 1:中国石油大学(北京)非常规天然气研究院

• 2:西班牙加泰罗尼亚理工大学土木工程学院

• 3:中国石油勘探开发研究院采油工程研究所

• 4:中国石油东方地球物理公司大港分院

摘要(Abstract)：

可降解纤维可以强制人工裂缝发生转向,促进复杂缝网的形成,目前还不清楚纤维强制裂缝转向规律。通过纤维滤失暂堵能力实验,评价纤维转向剂对人工裂缝的暂堵转向作用,分析纤维转向剂对不同裂缝宽度、不同流速时裂缝暂堵规律,确定形成暂堵的临界纤维质量分数。根据降解性能评价实验,纤维在少量水存在的情况下降解率能够达到85%以上,并在暂堵后依靠储层温度恢复而实现自动降解;根据真三轴压裂物模实验,验证纤维转向剂在裂缝存在条件下形成暂堵强制裂缝转向的可靠性,得出裂缝发生转向的水平主应力差上限为7.5 MPa,两次压裂产生裂缝间夹角与水平主应力差呈负相关关系。85口井次的现场纤维转向酸压工艺试验表明,转向压力最高达到40.0 MPa,增产效果明显。该研究结果对理解纤维暂堵裂缝转向机理与指导现场压裂施工设计具有指导意义。

关键词(KeyWords)：可降解纤维;转向压裂;降解性能;暂堵性能

Abstract:

Keywords:

基金项目(Foundation):国家重点基础研究发展计划“973计划”项目(2015CB250903);; 国家自然科学基金重大项目(51490652);; 国家建设高水平大学公派研究生项目(CSC 201506440005);; 中澳天然气技术伙伴关系基金(20150817120350);; 中国石油天然气股份有限公司科学研究与技术开发项目(2014A-4212);; 中国石油大学(北京)科研基金资助项目(2462016YXBS10)

作者(Author):汪道兵;周福建;葛洪魁;刘雄飞;石阳;Sergio Zlotnik;张薇;

Email:

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