麻黄山西区块二维地震资料综合解释与圈闭评价

应用二维地震资料,采用正反雷克子波对工区内14口井的侏罗系直罗组底(T₄)等3个标志层进行了精细合成地震记录标定及构造解释,明确了研究区断裂及构造特征。西部断裂带逆断层发育,4条主断层由北向南延伸,中部被2条近东西向的调节断层剪切,主要圈闭类型为断背斜、断鼻、断块圈闭;东部地层平缓,断裂不发育,主要发育低幅度背斜圈闭。针对复杂地表条件,通过精细速度场的分析和建立,提高了T₄,T₅,T₆构造图的精度,在综合评价的基础上提出了该区的勘探部署意见。

Integrated 2D seismic interpretation and trap evaluation on the western block of Mahuang Mountain

By using the Ricker wavelet of positive and negative frequencies in 2D seismic data,the calibration of accurate composite seismic traces and structural interpretation are conducted on three marker beds at the bottom of Jurassic Zhiluo Formation(T4)in 14 wells.The results show that reverse faults are developed in the western fractural area of the block;four main faults that extend from north to south are sheared by two E-W adjusting faults in the middle;the trap types are mainly faulted anticline,faulted nose,and faulted block.In its eastern part,strata are gentle and faults are not developed;trap type are mainly low-amplitude anticlines.Through the establishment and analyses of the accurate velocity field under the complicated surface conditions,the precision of structural maps of T4,Ts,and T6,is greatly enhanced.The proposals concerning the exploration strategy in the block are also put forward based on comprehensive evaluation.