大民屯凹陷中央构造带成藏有序性研究及下步勘探方向
|
摘要
大民屯凹陷处于勘探中后期,随着勘探程度不断提高,勘探难度也越来越大,迫切需要新的研究思路和方法对其剩余油气分布规律进行深化认识,本文首先通过构造有序性研究,确定下步勘探主攻圈闭类型;然后通过对地层分布进行研究,沙三段下部地层为自生自储,太古界是新生古储,这两种类型勘探最为有利,其次对运聚条件进行分析,梳理出三种成藏动力,进而划分出三种油藏类型,确定各种油藏类型分布的构造部位,并对储集空间进行研究,发现研究区储集空间多样,最后通过已发现油气分布有序性研究,找出已知油藏成藏及分布规律,确定剩余油气分布区,来指导下步宏观选区,进而指导下步中央构造带油气勘探,圈定中央潜山带深层(Ar)、荣胜堡洼陷坡洼构造带(Es_3)及中央构造带围斜部位(Es_3)作为下步有利目标区带。
Damintun Sag is at the middle and late stage of exploration.With the continuous improvement of exploration degree,the exploration is becoming more and more difficult.It is urgent to deepen the understanding of the distribution law of remaining oil and gas by new research ideas and methods.Firstly,the main types of traps in the next exploration were determined through the study of structural orderliness.Secondly,the study of stratigraphic distribution shows that source and reservoir were both in the lower strata of the third member of Shahejie Formation,and young source in old reservoir in the Archaeozoic.These two types are the most advantageous for the exploration.Thirdly,the analysis on the conditions of migration and accumulation shows that three kinds of hydrocarbon accumulation power were known,and three types of reservoirs were classified.Structural location of various types of reservoirs was determined,and the reservoir space was studied.Diverse types of reservoir space were found.Through the study of the orderliness distribution of discovered oil and gas,the formation and distribution rules of the known reservoirs were known,and the remaining oil and gas distribution areas were determined to guide the next macro-selection,and then to guide the next oil and gas exploration in the central structural belt.The deep layers(Ar) of central buried hill and slope-subsag struc-tural belt(Es_3) in Rongshengpu Subsag and pericline(Es_3) of the central structural belt were selected as favorable target zones for the next step.
Damintun Sag is at the middle and late stage of exploration.With the continuous improvement of exploration degree,the exploration is becoming more and more difficult.It is urgent to deepen the understanding of the distribution law of remaining oil and gas by new research ideas and methods.Firstly,the main types of traps in the next exploration were determined through the study of structural orderliness.Secondly,the study of stratigraphic distribution shows that source and reservoir were both in the lower strata of the third member of Shahejie Formation,and young source in old reservoir in the Archaeozoic.These two types are the most advantageous for the exploration.Thirdly,the analysis on the conditions of migration and accumulation shows that three kinds of hydrocarbon accumulation power were known,and three types of reservoirs were classified.Structural location of various types of reservoirs was determined,and the reservoir space was studied.Diverse types of reservoir space were found.Through the study of the orderliness distribution of discovered oil and gas,the formation and distribution rules of the known reservoirs were known,and the remaining oil and gas distribution areas were determined to guide the next macro-selection,and then to guide the next oil and gas exploration in the central structural belt.The deep layers(Ar) of central buried hill and slope-subsag struc-tural belt(Es_3) in Rongshengpu Subsag and pericline(Es_3) of the central structural belt were selected as favorable target zones for the next step.
引文
[1]邱芳,刘吉群.大民屯凹陷成藏动力系统划分及特征研究[J].海洋石油,2006.26(4):23-28.
[2]漆家福,于福生,陆克政,等.渤海湾地区的中生代盆地构造概论[J].地学前缘,2003(增1):199-206.
[3]邱芳.大民屯凹陷基岩油气藏油气运聚规律研究[J].河南石油,2005,20(3):1-3.
[4]史建南,郝芳,姜建群.大民屯凹陷高蜡油成藏机理研究[J].沉积学报,2005,23(3):546-553.
[5]陈振岩,陈永成,郭彦民,等.大民屯凹陷精细勘探实践与认识[M].北京:石油工业出版社,2007,107-109.
[6]史建南,姜建群,陈富新,等.大民屯凹陷超压发育机制及成藏意义[J].吉林大学学报:地球科学版,2005,35(6):745-750.
[7]王泽权,孙立志,英紫娟,等.大民屯凹陷再认识与重点勘探目标评价[J].石油地球物理勘探,2008(增1):151-157.
[8]牟春.大民屯凹陷基岩油气成藏特征研究[J].石油地质与工程,2011,25(3):4-7.
[9]刘兴周.辽河坳陷古潜山内幕基性岩脉对油气成藏影响[J].特种油气藏,2009,16(4):28-30.
[2]漆家福,于福生,陆克政,等.渤海湾地区的中生代盆地构造概论[J].地学前缘,2003(增1):199-206.
[3]邱芳.大民屯凹陷基岩油气藏油气运聚规律研究[J].河南石油,2005,20(3):1-3.
[4]史建南,郝芳,姜建群.大民屯凹陷高蜡油成藏机理研究[J].沉积学报,2005,23(3):546-553.
[5]陈振岩,陈永成,郭彦民,等.大民屯凹陷精细勘探实践与认识[M].北京:石油工业出版社,2007,107-109.
[6]史建南,姜建群,陈富新,等.大民屯凹陷超压发育机制及成藏意义[J].吉林大学学报:地球科学版,2005,35(6):745-750.
[7]王泽权,孙立志,英紫娟,等.大民屯凹陷再认识与重点勘探目标评价[J].石油地球物理勘探,2008(增1):151-157.
[8]牟春.大民屯凹陷基岩油气成藏特征研究[J].石油地质与工程,2011,25(3):4-7.
[9]刘兴周.辽河坳陷古潜山内幕基性岩脉对油气成藏影响[J].特种油气藏,2009,16(4):28-30.