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  

Prediction technology and effectiveness for temperature of granite inner reservoirs:a case study of hot dry rock in Gonghe Basin

作　　者：常德双 郭增虎 汪关妹 唐美珍 王冬雯 CHANG Deshuang;GUO Zenghu;WANG Guanmei;TANG Meizhen;WANG Dongwen(Geological Research Center,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China;North China Geophysical Division,BGP Inc.,CNPC,Renqiu,Hebei 062550,China)

机构地区：[1]东方地球物理公司研究院,河北涿州072751 [2]东方地球物理公司华北物探处,河北任丘062550

出　　处：《石油地球物理勘探》2024年第3期581-590,共10页Oil Geophysical Prospecting

基　　金：国家重点研发计划项目“深部热储地球物理探测技术联合研究”(2020YEF0201300-02)资助。

摘　　要：青海省共和盆地印支期花岗岩是有利的干热岩资源,但花岗岩内幕地震反射杂乱、非均质性强,目前基于地震资料的温度预测方法少见,制约了干热岩资源的开发。为此,提出花岗岩内幕储层温度预测技术。重构不同频段地震数据,优选花岗岩内幕横向反射连续性好的优势频带(10~20 Hz)数据开展构造解释,并结合地层岩性、电性纵向变化特征,将花岗岩内幕纵向分为四层;依据实验室结果,利用测井资料建立温度与地震速度的关系,然后开展高精度纵波速度反演,从而预测温度空间变化规律。该方法在共和盆地取得了较好的效果,可为类似地区提供参考。Indosinian granite in Gonghe Basin,Qinghai Province is a favorable hot dry rock resource.How-ever,the seismic reflection inside the granite is disordered and highly heterogeneous.At present,the tempera-ture 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 longi-tudinal 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 es-tablished 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.

关 键 词：干热岩 优势频带 温度预测 共和盆地 花岗岩内幕 

分 类 号：P631[天文地球—地质矿产勘探]