Study on prediction accuracy of structural depth in low exploration area
Depth prediction is an important basic condition for oil and gas exploration results,and the error requirement of oil field depth prediction is often strict.It is difficult for geophysical exploration workers to guarantee the accuracy of structural errors due to the few Wells,the low accuracy of seismic velocity and the difficulty in establishing velocity models.This paper analyzes the causes of depth errors in a risky exploration well in a certain area,and considers the effects of structural trend analysis,well velocity application,velocity model building method and model quality control analysis on reducing structural errors.At the same time,the scheme of reducing depth prediction error in different degree of low exploration areas is further discussed.On the premise that the velocity model is accurate enough,it must accept the structural errors brought by different exploration degrees and actual conditions.
Velocity modelDepth predictionStructural errorLow exploration area
NETL
NSTL
万方数据
