氮气钻井与筛管完井在中浅油层开采中的利用

Application of Nitrogen Drilling and Screen Pipe Completion in Middle-shallow Oil Reservoir Mining

摘要:

氮气钻井是使用氮气作为循环介质来冷却钻头并带出井筒内岩屑的钻井工艺技术，一般在深井提速或储层钻进中使用。大庆中浅油层具有低孔渗、低丰度、低产量等特点，采用常规钻井工艺开采会导致储层伤害，大幅降低原油产量。介绍了氮气钻井技术、柴油助返技术以及筛管完井技术在大庆中浅油层中的应用。通过4口井的现场试验和摸索，已经在大庆中浅油层的钻完井中形成了配套技术。还通过现场应用效果分析，说明了氮气钻完井技术在大庆中浅油层开采中的可行性和重要性。

Abstract:

Nitrogen drilling is to use nitrogen as circulating medium to cool the drill bit and carry out cuttings, which is generally used for efficiency improvement in deep well drilling or reservoir drilling. There are the characteristics of low porosity-permeability, low abundance and low production in middle-shallow reservoir of Daqing oilfield, mining by the conventional drilling process will result in reservoir damage and greatly reduce the output of crude oil. The paper introduces the application of nitrogen drilling technology, diesel dilution and screen pipe completion in middle-shallow reservoir of Daqing oilfield. Based on the field tests and exploration in 4 wells, the support technologies have been formed for drilling and completion in middle-shallow reservoir of Daqing oilfield. The analysis on the site application effect shows the feasibility and importance of nitrogen drilling in middle-shallow reservoir mining of Daqing oilfield.