73型GH等孔径射孔弹研制  

Development of Type 73 GH Equal Hole Perforating Charge

作　　者：孙程亮 贾萧鹏 杨大昭 邱石异 付浩 扈勇 SUN Chengliang;JIA Xiaopeng;YANG Dazhao;QIU Shiyi;FU Hao;HU Yong(North Schlumberger Oilfield Technologies(Xi’an)CO.LTD.,Xi’an,Shaanxi 710065,China;Changqing branch,China National Logging Corporation,Xi’an,Shaanxi 710065,China)

机构地区：[1]北方斯伦贝谢油田技术(西安)有限公司,陕西西安710065 [2]中国石油集团测井有限公司长庆分公司,陕西西安710065

出　　处：《测井技术》2023年第3期380-384,共5页Well Logging Technology

摘　　要：为解决非常规油气藏水平井射孔作业时,因射孔枪重力原因导致射孔枪不能在套管中居中、射孔后套管孔眼不均匀的问题,设计了一种药型罩结构为顶端锥形等壁厚、下端内壁为曲线的73型GH等孔径射孔弹。通过数值模拟分析得到该射孔弹形成射流直径粗、梯度小,在射孔枪不居中的情况下可实现射孔后套管孔径均匀一致。通过地面环靶试验测试,该射孔弹平均穿深为534.3mm,平均套管孔径为10.4mm,表明其具有大孔径深穿透的特点,套管孔眼直径相对标准偏差为4%,验证了数值模拟结果与实际结果相符,达到了等孔径的效果。研究表明,在水平井射孔时采用73型GH等孔径射孔弹,能够有效降低破裂压力。In order to solve the problem of the perforation gun not being centered in the casing due to the gravity of the perforation gun during unconventional horizontal well perforation operations in oil and gas reservoirs,and the uneven perforation of the casing hole after perforation.A 73 type GH equal aperture perforating projectile with a conical top with equal wall thickness and a curved lower inner wall is designed.Through numerical simulation analysis,it is found that the jet diameter formed by the perforating bullet is thick and the gradient is small,which can achieve uniform and consistent casing aperture after perforation when the perforating gun is not in the center.Through ground target testing,the average penetration depth of the perforating bullet is 534.3 mm,and the average casing aperture is 10.4 mm,indicating that it has the characteristics of large aperture deep penetration.The consistency deviation of aperture is 4%,which verifies that the numerical simulation results are consistent with the actual results,achieving the effect of equal aperture.The results show that the type 73 GH equal hole perforating charge can effectively reduce the rupture pressure when perforating horizontal wells.

关 键 词：射流 等孔径射孔弹 药型罩 套管孔径 破裂压力 

分 类 号：P631.84[天文地球—地质矿产勘探]