综合勘查方法在山东菏泽凸起东北部热储调查中的应用OA

By using geothermal geological survey with the scale of 1∶25000,geothermal field measurement,CSAMT,MT,drilling,comprehensive well testing,productivity testing and water quality analysis,geo-logical characteristics and development potential of the deep Ordovician thermal reservoir in the northeast of Heze uplift have been systematically evaluated.It is regarded that the buried depth of the constant tem-perature layer in the area is 20 m,and the temperature is 14.5℃.The thermal reservoir structure is mainly controlled by F0 and F1 faults.As reveallled by geophysical exploration,the buried depth of its roof is more than 2000 m.As showed by the drilling and logging results,the pores of the Ordovician thermal reservoir are well developed.As showed by the productivity test of the Ordovician thermal reservoir,when the water level drops 11.6 m,the water inflow of a single well can reache 320 m3/h,and the wellhead temperature is 48℃.In order to optimize the production,by using perforation technology,the heat flow channel has been strengthened.The downhole television imaging and static temperature measurement method have verified that the perforation quality is qualified.The subsequent three drawdown productivity tests further confirme the stimulation effect of this technology.It is showed that comprehensive applica-tion of comprehensive exploration methods can effectively clarify the characteristics of deep thermal reser-voirs,and targeted stimulation technology can significantly improve the development potential.The rele-vant results have reference significance for similar geothermal and fluid mineral exploration.