压裂液降滤失技术研究

The study of the technologies for fracturing fluid leakoff control

油层水力压裂是油气井增产、注水井增注的一项重要工艺措施。压裂施工的成功与否主要取决于所用的压裂液。而压裂液的滤失是影响压裂施工效果的重要因素之一。所以本文首先对压裂液滤失的危害进行了分析,综述了压裂液的滤失机理、影响因素。同时对降滤失技术进行了研究:目前常用的降滤失技术有提高压裂液粘度,添加压裂液降滤失剂和液氮降滤失技术等。最后对降滤失技术的发展进行了展望。

Hydraulic fracturing is an important measure for increasing oil and gas well production and water injection of injection well.The fracturing fluid has great effect on fracturing effect.Fracturing fluid leakoff is one of the key factors to effect fracturing operation.So firstly,the harm of the fracturing fluid leakoff was analyzed in this paper,it was summarized that the fluid leakoff mechanism of fracturing fluid,and the effect factor of fluid leakoff.Lately,the technologies for fluid loss control were studied in this paper.It was found that the common technologies for fluid leakoff control are increasing viscosity of fracturing fluid,adding the fluid leakoff agent,liquid nitrogen technology,and so on.Lastly,the technologies for fluid leakoff control were put forward at the end of the paper.