黑龙江省虎林盆地重力异常、基底构造及油气远景区

在波数域中处理虎林盆地重力资料,使用匹配滤波技术和扩充边线、边点的方法,有效地分离出区域场,给出相应的参数取值经验.根据虎林盆地布格异常和区域场特征,编制断裂及基底构造格局图,将盆地划分为条带状的3个隆起区和2个凹陷区,研究区可划分为近NE向、NEE向和EW向8条断裂.计算了结晶基底起伏界面深度,利用3D技术恢复出盆地基底起伏界面全貌,确定虎林河凹陷带和兴凯湖凹陷带为油气远景区.

Gravity anomaly, basin structure and gas-oil potential of the Hulin Basin in Heilongjiang Province

The paper deals with how to process the gravimetric data of the Hulin Basin in wave-number field by using the technology of matched filtrating wave and the method of extending lines or points of border areas to separate the regional gravity field efficiently and to gain the experiences of defining the values of related parameters. According to the characteristic of Bouguer gravity and regional gravity anomaly, the authors worked out a plot of structure pattern in the crystalline base of the basin. In the plot, three uplifts and two depressions were indicated and eight faults which are towands NE, NEE and EW are carued up. At the same time, the depth of boundary surface of the crystalline base were calculated. The technology of three-dimension was also used to recover the entire base the depressions of the Hulin River and Xingkai Lake are thought to be gas-oil potential.