西部复杂山地勘探走势分析

复杂山地山前带油气资源丰富，是中国西部地区的主要勘探领域之一。西部山地山前带具有地表类型复杂多变、地下逆掩推覆构造特征强烈的双重复杂性，给勘探资料的采集、处理和解释增加了难度。集中表现为地震资料信噪比低及构造精度差两个问题，也成为发展西部地震勘探的技术瓶颈。经过近十年的技术攻关，已形成了一套复杂山地地震勘探经验，成功攻克了一些复杂山地构造，找到了位于库车前陆盆地山前带的克拉2气田和迪拉2气田。但是，这种成功并不意味着西部其他山地勘探问题也会迎刃而解。由于我国西部复杂山地地震地质条件复杂多变，必须不断地针对具体存在的问题，研发新技术、新装备，才能满足西部地区油气勘探的需要。

Analysis of trend to complex mountainous exploration in west of China

Oil/gas resource is rich in piedmont of complex mountains that is one of major exploration fie-lds in the west of China.There are double complexities in piedmont of western mountains that characterized by both complex and variable surface conditions and strong underground feature of overthrust structure,increasing the difficulty in seismic data acquisition,processing and interpretation.The difficulties are focused on two aspects:lower S/N ratio of seismic data ratio and poorer structural precision that become a technical bottleneck of developing western seismic exploration.After near decade's technical tackling key problems,a set of experiences of complex mountainous seismic exploration has been formed,some complex structures have been successfully captured and Kela-2 gas field and Dila-2 gas field in the piedmont of Kuche foreland basin have been found.But,this success is by no means that the other problems in western mountainous exploration are readily solved.Since the seismic-geologic conditions in western complex mountains of China are complex and variable,it has to continuously develop new techniques and new equipments aimed at concrete existed problems,which can meet the needs of western oil/gas exploration.