雷鑫;张士诚;许国庆;邹雨时;郭天魁;

• 1:中国石油大学(北京)教育部石油工程重点实验室

• 2:中国石油大学(华东)石油工程学院

摘要(Abstract)：

为降低致密砂岩气藏偏高的地层破裂压力及增加储层改造体积,设计小型水力压裂实验装置,通过鄂尔多斯致密砂岩气藏钻井取心,研究不同射孔数量﹑射孔间距﹑射孔深度及水平应力差条件下水力压裂裂缝起裂与扩展规律.结果表明,射孔可以有效地降低致密砂岩气藏的破裂压力;增加射孔数量可以增加裂缝条数,并且裂缝沿射孔的方向扩展,有利于均匀布缝,提高储层的改造体积;低水平应力差和较小的射孔间距产生的缝间干扰导致裂缝在扩展的过程中发生偏转,缝间干扰随着射孔间距的增加及水平应力差的增大而减弱;射孔深度对于裂缝起裂也有一定的影响,裂缝更容易从射孔较深的区域起裂,为致密砂岩气藏压裂井射孔参数优化提供依据.

关键词(KeyWords)：射孔;致密砂岩气藏;裂缝起裂;裂缝扩展;破裂压力;缝间干扰

Abstract:

Keywords:

基金项目(Foundation):中国石油长庆油田分公司先导性项目(12YL1-FW-021)

作者(Author):雷鑫;张士诚;许国庆;邹雨时;郭天魁;

Email:

参考文献(References)：

• [1]Mayerhofer M J,Lolon E P,Warpinski N R,et al.What is stimulated reservoir volume[C].SPE 119890,2010:89-98.

• [2]Zhang Guangqing,Chen Mian,Wang Xueshuang.Influence of perforation on formation fracturing pressure[J].Petroleum Science,2004,1(3):56-61.

• [3]Lehman L,Brumley J.Etiology of multiple fractures[C].SPE 37406,1997.

• [4]Abass H,Brumley J,Venditto J.Oriented perforations:A rock mechanics view[C].SPE 28555,1994.

• [5]Daneshy A.Experimental investigation of hydraulic fracturing through perforations[C].SPE J4333,1973.

• [6]邓金根,郭先敏,孙焱,等.致密气藏压裂井定向射孔优化技术[J].石油钻采工艺,2008,30(6):93-96.Deng Jingen,GuoXianmin,Sun Yan,et al.Research on oriented perforation optimization technique for fracturing wells in tight gas reservoir[J].Oil Drilling and Production Technology,2008,30(6):93-96.

• [7]Behrmann L,Nolte K.Perforating requirements for fracture stimulations[J].SPE Drill Complet,1999,14(4):228-234.

• [8]Bunger A P,Jeffrey R G,Kear J.Experimental investigation of the interaction among closely spaced hydraulic fractures[C].ARMA11318,2011.

• [9]Fallahzadeh S H,Rasouli V,Sarmadivaleh M.An investigation of hydraulic fracturing initiation and near-wellbore propagation from perforated boreholes in tight formations[C].ARMA 2013662,2014.

• [10]King G E.Thirty years of gas shale fracturing:What have we learned[C].SPE 133456,2010.

• [11]Warpinskin N R,Teufel L W.Influence of geologic discontinuities on hydraulic fracture propagation[J].Journal of Petroleum Technology,1987,39(2):209-220.

• [12]Warpinski N R,Branagan P T.Altered-stress fracturing[J].Journal of Petroleum Technology,1989,41(9):990-991.

• [13]王素玲,董康兴,董海洋.低渗透储层射孔参数对起裂压力的影响[J].石油钻采工艺,2009,31(3):85-89.Wang Suling,Dong Kangxing,Dong Haiyang.Effect analysis of perforating parameters upon initiation pressure in low permeability reservoir[J].Oil Drilling and Production Technology,2009,31(3):85-89.

• [14]赵振峰,王文雄,邹雨时.致密砂岩储层压裂裂缝扩展数值模拟研究[J].新疆石油地质,2014,35(4):447-451.Zhao Zhenfeng,Wang Wenxiong,Zou Yushi.Numerical simulation research of fracture propagation in tight sand reservoir by volume fracturing process[J].Xinjiang Petroleum Geology,2014,35(4):447-451.