人工隔层技术在控缝高压裂井中的应用

发布时间：2018-01-07 14:39

本文关键词：人工隔层技术在控缝高压裂井中的应用　出处：《石油钻采工艺》2017年05期 　论文类型：期刊论文

【摘要】：压裂施工中,如果隔层的遮挡能力较差,裂缝就会穿过隔层,含水层离产层较近的情况下还会引起含水急剧上升,影响压裂效果,甚至造成压裂失败。为了提高压裂作业的成功率,对缝高控制技术进行深入研究,实验分析了人工隔层上转向剂和下转向剂的上率浮、沉降率、上浮相对速率、沉降相对速率及隔层应力提高率,优选出了上转向剂KR2(上浮率为97%,上浮相对速率1.78,突破压力提高7.23 MPa)和下转向剂KR4(沉降率为98%,沉降相对速率1.83,突破压力提高6.29 MPa)。现场试验中,上转向剂的加入很好控制了裂缝在高度上的延伸,控缝高效果显著,人工裂缝高度降低2.7 m且未压穿水层,为以后控缝高压裂井的施工提供了很好的参考。
[Abstract]:In order to improve the success rate of fracturing operation , the fracture rate , the relative velocity of floating , the relative rate of subsidence and the increase of the stress of the interlayer are analyzed . The results show that the upper steering agent KR2 ( the floating rate is 97 % , the relative velocity of floating relative rate is 1 . 78 , the breaking pressure is increased by 7.23 MPa ) and the lower steering agent KR4 ( the sedimentation rate is 98 % , the relative rate of sedimentation is 1 . 83 , the breakthrough pressure is increased by 6.29 MPa ) . In the field experiment , the addition of the upper steering agent controls the extension of the crack in the height , the control gap is high , the height of the artificial crack is reduced by 2.7 m and the water layer is not pressed , thus providing a good reference for the construction of the high - pressure cracking well in the future .

【作者单位】：中国石油华北油田公司勘探事业部;山东科瑞石油工程技术研究院;
【分类号】：TE357.1
【正文快照】： Citation:GU Wenbin,PEI Yubin,ZHAO Anjun,WANG Tao,CAI Jun,WU Kaikai.Application of artificial barrier technology tofracture height control in fracturing wells[J].Oil DrillingProduction Technology,2017,39(5):646-651.水力压裂是油气井增产改造的重要技术措施,

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