摘要
由于大位移定向井井斜大、位移长,射孔完井时存在电缆校深仪器下入难度高、常规封隔器坐封困难等问题,无法实现精准负压射孔,给开采底水油藏和薄油藏带来很大困难。为了解决大位移定向井精准负压射孔问题,根据大位移定向井特点,通过对比分析常规射孔管柱,引入非旋转坐封封隔器和随钻测井工具,优化施工参数和程序,优化设计了一套大位移定向井一趟多层精准负压射孔方案。现场开展3井次试验,日产液量400 m3/d,含水<10%。现场试验表明,通过对比钻井和射孔作业的测井数据可以较准确定位射孔深度,非旋坐封转封隔器操作简单且一次坐封成功率高,射孔后循环压井时有原油返出说明有一定负压效果,该射孔管柱在大位移定向井中有较好的适应性。
An extended reach well has large borehole deviation and long displacement,so in the process of perforation completion,the lowering of cable depth correction device and the setting of conventional packer are difficult and the precise negative-pressure perforation cannot be realized,which brings great difficulties to the production of bottom-water oil reservoirs and thin oil reservoirs.In order to realize precise negative-pressure perforation in extended reach wells,the conventional perforation strings were comparatively analyzed firstly.Then,based on the characteristics of extended reach well,the non-rotating setting packer and the logging tool while drilling were introduced,the construction parameters and procedure were optimized,and a set of scheme on multi-layer precise negative perforation in one trip in the extended reach well was optimally designed.And it was tested on site by three well times with daily liquid production of 400 m3/d and water cut less than 10%.The field tests indicate that perforation depth can be determined more accurately by comparing the logging data of drilling with that of perforation,the non-rotating setting packer is advantageous with simple operation and high success rate of one-trip setting.In addition,flowback of crude oil after perforation reveals the effect of negative pressure.It is demonstrated that this perforation string can be better applicable in extended reach wells.
作者
张永涛
张伟国
覃建宇
秦世利
贺振中
陈书豪
ZHANG Yongtao;ZHANG Weiguo;QIN Jianyu;QIN Shili;HE Zhenzhong;CHEN Shuhao(CNOOC China Limited Shenzhen Branch,Shenzhen 518067,Guangdong,China;CNOOC EnerTech-Drilling&Production Co.,Tianjin 300452,China)
出处
《石油钻采工艺》
CAS
北大核心
2019年第6期718-721,共4页
Oil Drilling & Production Technology
关键词
大位移井
油管传输射孔
负压
校深
非旋转坐封封隔器
extended reach well
tubing conveyed perforating
negative pressure
depth correction
non-rotating setting packer
