东濮凹陷的断层解释

The interpretation of faults in Dongpu depression

东濮凹陷各种成因的断层十分发育,而且与油气有密切的关系,因此,断层的解释在构造研究中显得特别重要。断层解释既要考虑断裂系统的模式,又要注意解释技巧。根据剖面特征和平面分布规律,东濮凹陷的断裂系统模式可分为四类,即堑式断裂系统、补偿式断裂系统、滑脱式断裂系统、阶梯式断裂系统。断层解释的技巧主要是在剖面上识别断层和在平面上进行断点组合。在平面上进行断点组合时,要把握住区域构造的方向、先主后次、剖面与平面相结合、应用断层交切规律、重视使用联络测线等,此外,还要充分利用钻井资料,才能正确地进行断层解释。

There arc various multitudinous faults in Dongpu depression, which are closely related to oil and gas resources;therefore,fault interpretation is of great importance in structure research. The fault inter pretation needs to not only consider the pattern of fauit system but also pay attention to the interpretation skill. In terms of the sectional feature and lateral distribution, the faults in Dongpu depression can be grouped under four heads: graben fault system, antithetic Ifault system, synthetic fault system and terrace fault system. The essential skill for fault interpretation includes two points: the good identification of faulting points on seismic section, and the reasonable link of relevant faulting points on base map. The key measures we must take in linking relevant faulting points on base map are (l)the full consideration of aeral geological structure trend (major structure trend being considered first), (2) integrative analysis of base map and sec tions, (3) the application of fault cutting principle and (4) referring to cross line sections. Besides, drilling data should be used to make good fault interpretation.