塔里木盆地孔雀河地区断裂构造及其控油气作用

Fault structure and its control on oil and gas in Kongquehe region,Tarim Basin

陈绪云 张根法

Chen Xuyun Zhang Genfa

中国石化 西北油田分公司勘探开发研究院,乌鲁木齐 830012

Research Institute of Petroleum Exploration & Production,SINOPEC Northwest Company,Urumqi,Xinjiang830012,China

通过地震剖面解释和断裂组合分析,认为孔雀河地区东部、中部和西部断裂平面展布特征不同,西部断裂主要为近东西向右阶雁行排列,中部断裂主要为北北东向平行排列,东部断裂主要为北西-近东西向左阶雁行排列。通过平衡剖面分析,分段研究了孔雀河地区构造演化过程,结合典型油气藏特征,认为古生界剥蚀较弱而中生代构造隆升、且位于通源断裂附近的地区,有利油气聚集成藏;并根据这些特征提出了有利的油气勘探区带。

Analyses of seismic profile and fault assemblage indicate that the horizontal distribution char acteristics of faults in the east,center and west of Kongquehe region are different.The western faults are mainly EW oriented and arrayed in right enechelon formation.The central faults are mainly NNE oriented and arrayed in parallel formation.The eastern faults are mainly NW-EW oriented and arrayed in left en-echelon formation.Based on analyses of balanced cross section,the tectonic evolution histories of different zones of Kongquehe region were studied.Combined with typical accumulation characteristics,it was concluded that the region favorable for petroleum accumulation located in where Paleozoic was weakly eroded and Mesozoic uplifted,and the region should be neighboring to active faults which lead to petroleum sources.Favorable exploration targets were also pointed out.

https://doi.org/10.11781/sysydz2011S1027