| Title | Reserch of Resevoir Reinjection Technology and Demonstration in Neogene Porous Guantao Group Reservoir in Binhai New Area, Tianjin |
|---|---|
| Authors | LIN Li, RUAN Chuanxia, WANG Yingping, ZHOU Xun, SUN Yixuan |
| Year | 2014 |
| Conference | Stanford Geothermal Workshop |
| Keywords | Tianjin, reinjection, geothermal resource |
| Abstract | Most part of Binhai New Area lies in the Huanghua depression of third level tectonic unit and small part of the area lies in the Cangxian uplift of third level tectonic unit. The Guantao reservoir generally distributes in this area except that there is no reservoir in the Xiaohanzhuang convex. The top depth is 1129-1806m, the total thickness is 100-500m. It is shallower and the thickness is 100-200m in the Cangxian uplift. It is deeper and the thickness is 200-500m in the Huanghua depression. Neogene Guantao Group is the main development and utilization reservoir in Binhai New Area, Tianjin. The development intension increases and reservoir pressure drops in recent years. Now the static water level is 90-114m, the most drawdown is 6.5m/aCthe most dynamic water level is more than 146m. It is pivotal to achieve sustainable utilization of geothermal resources through carrying out geothermal resources reinjection and controlling the water level rapid drawdown. It is important to resolve the Neogene Guantao Group reinjection rate. The author analyzes the reasons to reduce reinjection rate through reservoir sensitivity analysis, clogging reasons analysis, the reinjection well completion technology and ground equipment and techniques. The physical clogging is the main question of reinjection clogging. The well completion technology is pivotal to keep sustainable reinjection and the standard ground reinjection system can avoid physical and chemical due to geothermal fluids reinjection. Using successful well completion technology and standard ground reinjection system, the reinjection quantity is 100-123m3/h which is a big reinjection breakthrough of porous reservoir in Binhai New Area, Tianjin. |