辽宁石油化工大学学报2024，Vol.44Issue(5)：66-71,6.DOI:10.12422/j.issn.1672-6952.2024.05.010
川东北须家河深层气藏高效挖潜测试关键技术
Key Technologies for Efficient Tapping and Testing of the Xujiahe Formation Gas Reservoir in Northeastern Sichuan
摘要
Abstract
The terrestrial gas reservoirs in the northeastern Sichuan region have reserves of over 100 billion cubic meters in the Xujiahe River.In the early stages,small-scale sand fracturing or acid fracturing were mainly used for production,but no significant breakthrough in productivity was achieved.Due to the tight and high fracture pressure of the Xujiahe reservoir,the construction displacement is limited,making it difficult to add sand and resulting in poor transformation effects.By conducting research on the guarantee technology for the operation of potential tapping wells,the Xujiahe potential tapping well wellbore treatment and fine pressure control technology have been developed,which has solved the problems of wellbore control and pressure control during construction operations caused by the coexistence of original test layers and large differences in ground pressure coefficients.The idea of tapping the potential of multiple layers in a single pipeline column has been proposed,forming a combination of large-diameter oil pipes and segmented fracturing pipelines with packers.The interactive operation of 140.0 MPa and 105.0 MPa wellheads meets the requirements of ultra-high pressure large-scale sand addition operations and later production.The application has been carried out in YB6,YL15,and YL171 wells,successfully achieving potential tapping operations in three old wells.A layer by layer fracturing of the four reservoirs was completed in the YL171 well using a single string,resulting in a production of 32 5000 cubic meters per day at a hydraulic pressure of 71.0 MPa.关键词
川东北/须家河/挖潜井/超高压/压裂管柱Key words
Northeast Sichuan/Xujiahe River/Tapping potential wells/Ultra-high voltage/Fracturing string分类
能源科技引用本文复制引用
范青,刘生国,伍强,杨云徽..川东北须家河深层气藏高效挖潜测试关键技术[J].辽宁石油化工大学学报,2024,44(5):66-71,6.基金项目
中国石化重大项目"川西须二气藏钻完井及储层改造关键技术"(P21040-3). （P21040-3）
