如何发展四川盆地地震勘探?

HOW TO PROMOTE THE SEISMIC EXPLORATION IN SICHUAN BASIN?

当前世界地震勘探面临石油降价，资金短缺，地质条件复杂三大困难，四川盆地地震勘探如何发展？通过分析世界地震勘探技术发展的趋势和效果，结合四川盆地的实际情况，提出以下认识：只有加快发展高分辨率、三维和采集、处理、解释一体化勘探的进程，同时不断促使生产成本下降，才能在市场经济激烈竞争下占有市场。高分辨率勘探三要素中，高信噪比是基础，没有高信噪比就没有高分辨率和高保真度。要提高分辨率和保真度，首先要压低噪声水平以及消除来自地表的声波和高频随机噪声，从而扩大同时记录高低频信息的频带宽度。要做好高分辨率采集，一要选好装备，二要严格施工，三要改进采集方法。发展高分辨率小面积三维采集、处理、解释一体化勘探，提高纵向和横向分辨率，提高采集密度、精度、可靠性和准确性，从而提高勘探成功率，加快投资回报，实现以油养油，以气养气的良性循环。

At present,three difficulties as the reduction of oil prices,the shortage of funds and the complicated geological conditions are faced in the seismic exploration in the world,therefore we must know how to promote the seismic exploration in Sichuan Basin.Through analyzing the trend and results of the seismic exploration techniques in the world and in combination with the practical situation of Sichuan Basin,the following knowledge is achieved,i.e.only the progress of integrated exploration of the high resolution 3 D acquisition,processing and interpretation will be rapidly developed and the production cost will be uninterruptedly reduced simultaneously,can a place be occupied in the intensive competition for markets.High signal to noise ratio is the basic one in the three factors of high resolution exploration,so without it the high resolution and high fidelity can′t exist.In order to increase the resolution and fidelity,the noise level must be reduced first and the sonic wave and high frequency random noise coming from surface must be eliminated,which can enlarge the width of frequency band of simultaneously recording high and low frequency information.In order to carry out high resolution acquisition,it is necessary to choose good equipment first,then to operate seriously and then to improve the method of acquisition.Carrying out the integrated exploration of the high resolution small area 3_D acquisition,processing and interpretation can increase the vertical and lateral resolutions,enlarge the density of acquisition and raise the precision,so as to enhance the success ratio in exploration,quicken investment recovery and realize a good cycle of “Exploring for Oil (Gas )by Selling Produced Oil (gas).”