摘要
青海油田尖顶山具有地质构造复杂、地层可钻性差的特点,其中基岩段的岩石可钻性可以达到9~10级,导致该区块机械钻速低,钻具寿命短,这一情况一直制约着该区块钻井提速。针对上述问题,西部钻探钻井工程技术研究院自主研发了Ⅱ型扭力冲击钻井提速工具(简称Ⅱ型扭冲)以及相配套的PDC钻头。青海油田尖北1~4井基岩段的钻井过程中使用了Ⅱ型扭冲,机械钻速获得了重大突破,机械钻速较钻井设计提高了2.85倍,较使用螺杆+PDC钻头的尖探1井同层段钻速最大提高3.71倍,相比较尖探1井基岩段的钻井过程减少了5次起下钻趟数,显著的解决了尖北区块基岩层钻速低,钻头寿命短的问题。Ⅱ型扭冲+PDC钻头的配套提速技术为青海油田基岩钻井提速提效提供了新的技术途径。
The Jianbei block in Qinghai oilfield has the characteristics of complex geological structure and poor drillability of the formation, in which the rock drillability of its pedestal section can reach the level of 9-10, and it would lead to low drilling rate and short service life of the drilling tool, such situation has always restricted the drilling acceleration of the block in this area. In order to solve these problems, the Drilling Engineering Technology Research Institute of Western Drilling Company has independently developed the type Ⅱ torsional impact tool and its supporting PDC bit. With this tool, a great breakthrough has been achieved in the bedrock drilling acceleration of well Jianbei 1~4 in Qinghai oilfield. The drill rate is 2.85 times higher than that of the drilling design;the maximum increase is 3.71 times as much as that of the same interval of well 1 with screw and PDC bit;the number of drilling times in bedrock is reduced by 5 times compared with the drilling process of bedrock section of the adjacent well Jiantan 1. Thus the application of torsional impact tool has effectively promoted the drilling acceleration and efficiency in Jianbei block foundation rock. The matching speed increasing technology of TypeⅡ torsional impact tool + PDC bit could provide a new technical way for accelerating the drilling rate in bedrock of Qinghai oilfield.
作者
张克明
张昕
伊明
王伟罡
张胜鹏
李富强
王锋
ZHANG Ke-ming;ZHANG Xin;YI Ming;WANG Wei-gang;ZHANG Sheng-peng;LI Fu-qiang;WANG Feng(Drilling Engineering Technology Research Institute of Western Drilling Company,Urumqi Xinjiang 830001,China;Exploration Division of Qinghai Oilfield Branch,Huatugou Qinghai 816400,China)
出处
《机械研究与应用》
2019年第4期118-120,123,共4页
Mechanical Research & Application
