The Nanpu Sag in the Huanghua Depression of the Bohai Bay Basin is rich in geothermal resources

with multiple geothermal fields identified

including Gaoshangpu-Liuzan

Nanpu

and Matouying. The thermal reservoirs

primarily composed of fluvial sandstone from the Guantao Formation

exhibit advantages such as high temperatures（70-90 ℃）

significant water amounts (100 m

3

/h)

large-scale reservoirs

and thick caprocks. However

their development faces several challenges

including optimal target area selection

sustainability evaluation

efficient drilling and production processes

reinjection into sa

ndstone reservoirs

long-distance centralized thermal water transportation

and intelligent monitoring. To address these challenges

practical exploration in the Gaoshangpu-Liuzan geothermal field has led to the development of five core technologies: 1） optimization and detailed resource evaluation technology for exploration areas; 2） well placement and thermal field simulation technology; 3） geothermal well drilling

completion

and pressure-free reinjection for sandstone thermal reservoirs; 4） multi-well collection and long-distance thermal water transportation technology; 5） intelligent management and control technology for geothermal development. These advancements provide technical support for geothermal heating projects in the Gaoshangpu-Liuzan geothermal field and the geothermal development efforts of Jidong Oilfield.