摘要
塔里木盆地的主要地震构造样式有:正花状构造、背冲断裂构造、扇状褶皱断裂构造、反转构造等。正花状构造受剪压应力所作用,是最为有利的油气富集部位;背冲和扇状褶皱断裂构造主要受挤压应力作用,也是油气富集部位。反转构造则是挤压与拉张两种应力作用相叠加的结果,包括正反转与负反转,前者是有利勘探构造,后者是不利构造。在深层地震信息不够确切时,易把背冲断裂构造带解释成花状构造。塔里木盆地在海西期受南北向压应力控制,形成塔北和塔中两组花彩弧断裂束,遥相对应展布成全盆地菱形断裂系统。花彩弧两翼转弯处的北东、北西向构造带受剪切力强烈,易形成正花状构造;东西向构造带则以形成背冲断裂构造样式为主。
There are four major styles of seismal structre:the positive flower structre,back thrusting faulted structre,fan structre and inverted structre and so on.The positive flower tructre is a best one for oil/gas accumulation owing to the shear stress being acted,the back-thrusting faulted structre and fan structre are also important for oil/gas accumulation because they are suffered force of compression.The inverted structral results from the opposite stress,compression and tension.It includes positive structural inversion and negative structral inversion,the former is a favourable exploratory structre,the latter is an unfavourabIe one.When the seismic information is not reliable,one could easily explain the back-thrusting structre as flower structre.The Tarim Basin has formed two festoon-faulted bunches,one in the northern Tarim and the other in the middle Tarim.They developed a lozenge faulted system and correspond to each other from afar.At the NE and NW directions of the two festoon wings are formed easily the positive flower structre thanks to the shear stress;and at the EW directional structres are mainly formed back-thrusting structures.
出处
《海相油气地质》
1996年第4期5-9,共5页
Marine Origin Petroleum Geology
关键词
油气勘探
地震勘探
构造模式
塔里木盆地
油矿床
Structral model
Tectonic stress
Structral interpretation
Seismic interpretation
Hydrocarbon accumulation
Oil and gas exploration
Tarim Basin
