碳量子点示踪剂产出剖面测试技术评价与应用

Evaluation and Application of Carbon Quantum Dot Tracer Production Profile Testing Technology

水平井多级压裂改造是目前中国致密油气、页岩油气等非常规油气藏开采的主要手段,而碳量子点示踪剂产出剖面测试技术伴随压裂作业同时施工。产液剖面测试能够获得压裂后各层段压裂液的返排情况、见油期的产液剖面、生产期各储层的产出贡献等信息,指导后期调剖隔采等增产措施,同时对压裂效果进行评价,以选择合适的压裂液、优化压裂规模,进而降低压裂成本和提高油气采收率。该测试技术对低孔低渗油气藏的水平分段改造手段具有一定指导意义。

Horizontal well multi-stage fracturing reconstruction is currently the main method for unconventional oil and gas reservoir development in China,including tight oil and gas and shale oil and gas reservoirs.The application of carbon quantum dot tracer production profile testing technology is carried out simultaneously with the fracturing operation.Liquid production profile testing can provide information on the backflow conditions of fracturing fluids in each interval after fracturing,the liquid production profile during the oil viewing period,and the production contribution of each stage during the production period.This information guides subsequent enhanced oil recovery measures such as profile control and interval mining,evaluates the effectiveness of fracturing,selects appropriate fracturing fluids,optimizes the fracturing scale,thereby reducing fracturing costs and increasing oil and gas recovery rates.This testing technology has certain guiding significance for the horizontal segmentation reconstruction of lowpermeability and low-porosity oil and gas reservoirs.