石油钻采工艺2023，Vol.45Issue(5)：555-561,7.DOI:10.13639/j.odpt.202308002
低压低渗透气田Ø139.7mm套管开窗侧钻水平井钻井液技术
Drilling fluid technology for sidetracking horizontal wells with Ø139.7 mm casing windows in low-pressure and low-permeability gas fields
摘要
Abstract
Sulige Gas Field presents low-pressure and low-permeability features.Production of some wells with traditional technology is unprofitable.Implementing drilling fluid technology for sidetracking horizontal wells with Ø139.7 mm casing windows is beneficial for the recovery of abandoned wells.Compared to conventional wellbores,the sidetracking horizontal wells with Ø139.7 mm casing windows face technical challenges such as lubrication,anti-sticking,mudstone collapse in the horizontal section and leaking in narrow annular spaces.Therefore,a CQSP-4 drilling fluid system,with strong inhibition and powerful sealing capacity,was developed.And,the rheological,anti-collapse,inhibitive,and lubricating properties of the drilling fluid system were evaluated indoor.The experiments showed that the cuttings rolling recovery rate reached 95.63%after 12 h at 100℃,and after 24 hours of hot rolling at 100℃,API filtration loss was 2.8 mL,and the high-temperature and high-pressure filtration loss was 13.2 mL,with a high resistance to cuttings contamination up to 14%.Furthermore,drilling fluid processes such as casing window sidetracking,open-hole section drilling,solid phase control,leak prevention,friction reduction and hole cleaning were optimized.As of December 2022,a total of 18 wells had been field-tested.The drilling cycle reduced by 69.58%compared to 2017-2018,the rate of penetration increased by 102.82%,and the average drilling cycle decreased from 80.5 days to 24.49 days,achieving the goal of speeding up and improving efficiency.This technology has a guiding significance for the construction of similar wells in other regions at home.关键词
苏里格气田/低压低渗透气田/侧钻/水平井/钻井液/Ø139.7 mm套管Key words
Sulige Gas Field/low-pressure and low-permeability gas field/sidetracking/horizontal well/drilling fluid/Ø139.7 mm casing分类
能源科技引用本文复制引用
侯博,李录科,张珩林,刘振,孙志强..低压低渗透气田Ø139.7mm套管开窗侧钻水平井钻井液技术[J].石油钻采工艺,2023,45(5):555-561,7.基金项目
中国石油重点科技攻关项目"集团公司侧钻井技术示范与推广"(编号:2019D-4209). （编号:2019D-4209）
