Prediction technology and effectiveness for temperature of granite inner reservoirs： a case study of hot dry rock in Gonghe Basin
CHANG Deshuang1, GUO Zenghu1, WANG Guanmei1, TANG Meizhen1, WANG Dongwen2
1. Geological Research Center, BGP Inc., CNPC, Zhuozhou, Hebei 072751, China; 2. North China Geophysical Division, BGP Inc., CNPC, Renqiu, Hebei 062550, China
Abstract：Indosinian granite in Gonghe Basin, Qinghai Province is a favorable hot dry rock resource. However, the seismic reflection inside the granite is disordered and highly heterogeneous. At present, the temperature prediction method based on seismic data is rare, which restricts the development of hot dry rock resources. Therefore, the temperature prediction technology for granite inner reservoirs was proposed. The seismic data of different frequency bands were reconstructed, and the dominant frequency band （10~20 Hz） with good lateral reflection continuity inside the granite was optimized for tectonic interpretation. Combined with the longitudinal variation characteristics of lithology and electrical properties, the interior of granite was divided into four layers. According to the laboratory results, the relationship between temperature and seismic velocity was established by using well logging data, and then high-precision longitudinal wave velocity inversion was carried out to predict the spatial variation of temperature. This method has achieved good results in Gonghe Basin and can provide a reference for similar areas.
常德双, 郭增虎, 汪关妹, 唐美珍, 王冬雯. 花岗岩内幕储层温度预测技术及效果——以共和盆地干热岩为例[J]. 石油地球物理勘探, 2024, 59(3): 581-590.
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