石油地质与工程2024，Vol.38Issue(2)：102-107,6.
松辽盆地致密气藏暂堵转向压裂裂缝扩展规律研究
The expansion law of temporary plugging and diverting fracturing fractures in tight gas reservoirs in Songliao Basin
摘要
Abstract
Tight gas reservoir in Songliao Basin is an important field for deep natural gas exploration and de-velopment.Due to the deep burial depth(3 000～5 500 m),low porosity,and permeability,natural frac-tures are underdeveloped,with a large pressure difference(8～12 MPa).Conventional fracturing fractures have a single shape,small reservoir transformation volume,and low production.Therefore,achieving the complexity of artificial fractures in deep tight gas reservoirs is the main direction of improving the transforma-tion effect.In order to demonstrate the feasibility of forming complex fractures through temporary plugging and fracturing in tight gas reservoirs in the Songliao Basin,a simulation experiment of temporary plugging and fracturing in full diameter rock cores was conducted using a true triaxial fracturing simulation system to evaluate the characteristics of hydraulic fracturing crack initiation,expansion,and temporary plugging and fracturing in tight gas reservoirs under different gravel conditions.The results show when the difference in stress between the two directions is high,bilateral symmetrical single fractures are formed after fracturing.After using temporary plugging fracturing to promote the turning direction,the complexity of the fractures is increased,and the morphology of the fractures becomes more complex.The large particle size of gravel cau-ses local tortuosity of hydraulic fractures,forming a large number of shear micro-cracks around the gravel.The fracture morphology is more complex,and the overall fracture morphology of rock samples without gravel is lower than that of rock samples with gravel.关键词
致密砂砾岩/非均质性/暂堵转向压裂/脆性/复杂裂缝Key words
tight glutenite/heterogeneity/temporary plugging and diverting fracturing/brittleness/com-plex fractures分类
能源科技引用本文复制引用
齐士龙,邢丽波,李琳,李存荣,张玉梅,卢澍韬..松辽盆地致密气藏暂堵转向压裂裂缝扩展规律研究[J].石油地质与工程,2024,38(2):102-107,6.基金项目
中国石油天然气集团有限公司科技项目"新区效益建产关键技术"(2023ZZ25-004). （2023ZZ25-004）
