低渗储层分注井示踪剂测吸水剖面技术的探讨

INJECTION PROFILE MEASUREMENT WITH THE TRACER IN SEPARATE INJECTION WELLS FOR LOW PERMEABILITY RESERVOIRS

长庆油田是我国典型的低孔、低渗油田，分注井的大部分具有“定向井、小水量”的特点。这类注水井吸水剖面测试存在诸多问题，如同位素的沾污、沉淀等，使得小水量注水井吸水剖面测试精度低、效果较差。论文针对这些问题，提出可行性的改善措施。通过对同位素载体的选择、完善注入方式和测井系列等方面的考虑，来达到改善吸水剖面的测试的精度，对提高精细分层注水效果具有重要的指导意义。

Changqing oilfield is a typical low porosity and low permeability reservoir of China with the characteristics of directional well and small amount of water in most separate injection wells.There are many problems in this kind of injection profile testing method such as isotope contamination and sedimentation whcih make the accuracy and efficiency of small amount of water injection profile testing low.Aiming at these problems,some feasible improvement measures are put forward in the paper.On consideration of isotopic carrier selection,improvement of water injection method and logging series,the accuracy of injection profile testing can be improved.It has guide significance in improving fine layered water injection.