油田水力压裂裂缝的放射性示踪实验研究

针对目前油田主要的增产措施--水力压裂的效果进行评价，使用放射性示踪技术，对压裂裂缝进行示踪实验研究。首先制备了三种示踪砂，在压裂过程中注入到裂缝中，再经过能谱测井，跟踪地层中示踪砂能区伽玛计数率的变化，可以直观清晰的确定裂缝的深度和高度，清楚的判断裂缝是否处于压裂目标地层，实验过程中使用三种示踪砂跟踪压裂过程，反映裂缝是否在压裂过程中持续发育，进而评价压裂效果。研究结果表明，压裂裂缝放射性示踪可以完善裂缝参数，为压后评价和相同油区块压裂施工设计提供有效依据。

Experimental Study on Radioactive Tracer of Hydraulic Fracturing in Oilfield

For the evaluation of the hydraulic fractures the production increasing measures in the oil deposit, the radioactive tracer technique is used to trace fracture in field. First, three kinds of tracer-sand are prepared, which are injected into the fracture during fracturing process, and then by the energy spectrum logging and tracing the gamma counting rate of the energy area in the stratum, The height and depth of the fracture can be accurate located and judge out whether the fracture is in the target stratum. Three kinds of tracer-sand tracked the fracturing process, which can reflect whether the fracture develops during the process, and then evaluates the hydraulic fracturing. The radioactive tracer of hydraulic fracture can enrich the fracture parameters and provide an effective basis for evaluation and the design of the fracture in the same oil block.