复合射孔技术在长庆油田的应用效果

复合射孔技术是了孔缝结合型超深射孔技术，可克服常规射孔的多深浅，无法突破近井污染带，存在压实伤感等缺陷，可有效破除常规射孔在岩石基体中产生的压实带，为正确评价该技术在长庆油田应用6年的效果，选择了21口复合射孔中和与之相邻石油层物性非常相近的28口常规射孔井，分5个区块，对射孔，效果进行对比评价，结果表明，复合射孔技术可使地层破裂压力平均降压3-5MPa，大大提高射孔孔道附近油层的渗透率，改造低渗，物低渗储集层的效果比常规射孔技术更为明显，并能自效降低施工成本，对提高低孔，低渗油，气压产能的效果显著，图1表2参7

Application of compound-penetration in Changqing Oilfield

Compound perforation technique is a pore-fracture and super-depth perforation technique and also can conquer the shortcoming of conventional perforation technique since a conventional perforation technique has shallow penetration, can not break through the damage zone near the bore and compacted formation damage exists. Compound perforation technique explodes compacted sandstone which is made by conventional perforation technique. In order to evaluate the 6 year application of compound perforation technique in Changqing Oilfield, 24 wells used compound perforation technique and 28 wells used conventional perforation technique in 5 blocks, which have similar physical properties of reservoir, have been selected for the comparison. The compound perforation technique can reduce 3-5MPa of formation break-pressure and increase formation permeability around the perforation channel and can reduce effectively perforation cost of oil-gas wells.