利津洼陷北部第三系构造样式及其分布
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摘要
根据区域地质、地震资料对利津洼陷北部地区的构造样式及其分布进行了研究。研究表明,第三系处于伸展拉张构造背景下的利津洼陷北部地区,发育了许多伸展构造样式,主要包括复合地垒地堑、反向Y字型、多级Y字型构造、X字型构造、垮塌构造、多米诺式断层、顺向倾跷断块构造、逆牵引背斜构造。多米诺式断层及顺向倾跷断块构造样式主要分布在北部陡坡带地区,逆牵引背斜构造、垮塌构造、多级Y字型构造、X型构造、复合地堑地垒构造主要分布在中部凹陷区,反向Y字型构造分布在南部古隆起附近的缓坡带上。研究区地层的隆起活动对该地区7条主要断层的形成起到了控制作用,而7条主要断层又对构造样式的形成起了控制性作用。
Both structural styles and distribution of Tertiary in northern Lijin subsag are studied based on regional geological and seismic data.Results show that (1) the Tertiary is against a background of stretch and extension structures,in which many structural styles are developed,mainly including compound horst and graben,reverse Y-shape,multiple Y-shape and X-shape structures,collapse structure,domino fault,consequently tilting fault block and rollover anticline;(2) domino fault and consequently tilting fault block are dominantly distributed in northern slope belt,central sag belt for the rollover anticline,collapse,multiple Y-shape,X-shape structures,and compound horst and graben,and gentle slope region of around southern paleolift belt for the reverse Y-shape structure,respectively; and (3) not only uplift movement in the study area may control the formation of 7 main faults,but also these faults may control structural styles.
Both structural styles and distribution of Tertiary in northern Lijin subsag are studied based on regional geological and seismic data.Results show that (1) the Tertiary is against a background of stretch and extension structures,in which many structural styles are developed,mainly including compound horst and graben,reverse Y-shape,multiple Y-shape and X-shape structures,collapse structure,domino fault,consequently tilting fault block and rollover anticline;(2) domino fault and consequently tilting fault block are dominantly distributed in northern slope belt,central sag belt for the rollover anticline,collapse,multiple Y-shape,X-shape structures,and compound horst and graben,and gentle slope region of around southern paleolift belt for the reverse Y-shape structure,respectively; and (3) not only uplift movement in the study area may control the formation of 7 main faults,but also these faults may control structural styles.
引文
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[2]田景春,曾允孚,尹观,等.东营凹陷西部沙河街组三段上部泥岩中白云岩夹层成因研究[J].矿物岩石,1997,17(4):61-67.
[3]王建飞,邓美寅,张金亮.利津洼陷沙三上亚段白云岩成藏条件及含油特征研究[J].特种油气藏,2008,15(5):24-26.
[4]周建林.东营凹陷利津洼陷北部沙三段地震相类型及其展布特征研究[J].石油天然气学报,2010,32(4):67-70.
[5]李继亭,曾溅辉,吴嘉鹏.利用东营凹陷典型剖面分析地层压力演化与油气成藏关系[J].岩性油气藏,2011,23(4):58-64.
[6]李波,田美荣,张帆,等.东营凹陷太古界基岩储层特征及分布规律研究[J].岩性油气藏,2011,23(1):52-56.
[7]刘和甫.沉积盆地地球动力学分类及构造样式分析[J].地球科学,1993,16(6):699-724.
[8]能源,吴景富,漆家福,等.琼东南—珠江口盆地深水区构造样式及其分布特征[J].天然气工业,2011,31(8):32-37.
[9]张莹.苏北盆地构造样式与油气分布[J].石油地质与工程,2009,23(4):8-11.
[10]李丕龙.陆相断陷盆地油气地质与勘探[M].北京:石油工业出版社,2003.
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