石油地质与工程2025，Vol.39Issue(1)：13-20,8.
页岩气压后返排油嘴动态调整技术应用及效果评价
Application and effectiveness evaluation of dynamic adjustment technology for shale gas pressure flowback nozzle:a case study of the H62 platform of Z201 block in southern Sichuan
摘要
Abstract
Shale gas pressure flowback system plays a key role in fracturing evaluation and production effect.At present,the domestic shale gas pressure flowback system is still in the exploratory stage,and the adjust-ment of oil nozzles is based on experience and fixed models,and a scientifically mature backflow system has not yet been formed.Based on the mechanism of shale gas well flowback damage,with the"four factors"as the main factor,a set of dynamic adjustment technology for flowback nozzles that can characterize reservoir fracture damage in real time is formed.Among them,flowback damage is the result of a combination of vari-ous types of damage,including water trap damage,clay expansion,proppant reflux,particle migration,proppant breakage and embedding,scale precipitation,fracture salt crystallization,and stress sensitivity.According to the damage characteristics of shale gas flowback in the study area,four factors were defined:flow,damage,stress and productivity factors,which realized the real-time and accurate characterization of the real state of the reservoir fracture system during the flowback process.By conducting numerical simula-tions and determining the influence weights of four factors in each stage of flowback,a more comprehensive and reasonable basis has been provided for adjusting the nozzle.Through the practical experience of four wells on H62 platform in Z201 block,it has been proven the dynamic adjustment technology of the flowback nozzle,mainly based on the"four factors"has achieved good results.The final recoverable reserves have increased by 25.8%compared to the previously developed wells,and the production capacity has met the requirements of the development plan,which is meaningful for the subsequent construction of the block to meet the standards.关键词
页岩气/油嘴动态调整/返排伤害/四因子/最终可采储量Key words
shale gas/dynamic adjustment of oil nozzle/flowback damage/four factors/final recoverable reserves分类
石油、天然气工程引用本文复制引用
李海,郑马嘉,赵文韬,余杨康,罗迪,曾文,黄勇斌,廖伟翔..页岩气压后返排油嘴动态调整技术应用及效果评价[J].石油地质与工程,2025,39(1):13-20,8.基金项目
中国石油西南油气田公司项目"蜀南地区页岩气勘探开发关键技术研究"(2023ZX02). （2023ZX02）
