从海拉尔盆地勘探历程看大庆外围中小型盆地勘探前景

通过对海拉尔盆地勘探历程的总结,阐述了断陷盆地勘探的四个特点,即盆地勘探突破需要一定的前期投入准备和具有较长的储备时间,勘探工程量投入与勘探成果呈正相关性,盆地勘探的突破与三维地震量的加大同步,资源量的认识在勘探的不同阶段存在一个较大的变动过程;分析了断陷盆地勘探所需历经的地震勘探准备阶段,系统研究、准确定位阶段,以及加大三维地震、钻井工作量,勘探从发现到突破阶段等三个阶段;得出了工程量的投入是勘探突破的保障,二维地震是勘探发现的基础、三维地震是勘探突破的关键,断陷盆地资源量的认识与钻探程度密切相关等三个结论。以此为模式,类比并提出了三江、漠河、大杨树、依兰—舒兰、孙吴—嘉荫等大庆外围中小型盆地具有较好的勘探前景。

Exploration Prospects of Medium-small Basins Periphery Daqing Oilfield Seen from the Exploration History of Halar Basin

Through summarizing the exploration history of Halar basin, it is discussed the exploration of fault-depression basins have four features, including (1) lots of investment input for exploration at early stage and long time to prepare before making exploration breakthrough;(2) the positive correlation between exploration engineering quantity and exploration results;(3) expanding 3D seismic exploration while resulting in new discovery of basin exploration results; (4)resources to be understood varies largely with different stages of exploration .After analysis the three stages of fault-depression exploration including the prepare stage for seismic survey, systematic study and accurately making location of a well,as well as increasing the quantities of 3D seismic and drilling works,and exploration from discovery to breakthrough ,it is concluded that the engineering quantity can ensure the breakthrough of exploration, 2D seismic is the base of exploration discovery and 3D seismic is crucial to exploration breakthrough, the resources of fault-depression basin has close relation with drilling degree.Accoding to the model above,it puts forward that the medium-small basins such as Sanjiang basin,Dayangshu basin,Yilan-Shulan basin,Sunwu-Jiayin and etc. ,which all locate at periphery Daqing Oilfield, have better prospects for exploration.