Variable Velocity Mapping In Short And Its Application In Western Sea Area Of Nanhai Sea

Recent years, seeking the complicated rock oil gas of hidden nature hides becoming the major exploration objective of most of oil areas. The exploration degree of difficulty is very big, this has been put forward the new requirement to the earthquake exploration method technology. Along with raising of exploration level, that by original the seeking large-scale construction oil gas of work hides to turn to gradually to seek low range construction and rock oil gas and hides is explored that in the Han oil gas basin. It is more and more higher to the earthquake datum explanation with the requirement constituting into the picture precision, therefore building also having put forward the higher requirement with constituting into the picture method to the speed field.The speed change becomes the picture technology is applies along the layer the is concerned with layer speed inversion method is begged to take the layer speed accurately, the method that afterwards the use picture moved is partially carried on the comparatively accurate deep change of time to the time construction picture. The major achievements that the income is arrived is the degree of depth construction picture. It is effective means and the method to study low range construction and complicated fault block.The key that gains the high precision construction picture depends on the precision to raise speed. Is concerned with on the edge layer , and a layer speed inversion is folding back layer of the best method that the speed was analysed. This is one kind based on the speed inversion method of the model, method capturing layer speed of accurate space seat that it is followed the trail of by way of iterate CRP's ray. Is concerned...