迈陈凹陷陆区油气运聚条件研究
|
摘要
油气输导及汇聚条件是迈陈凹陷油气成藏的重要控制因素。以北部湾盆地迈陈凹陷东部陆区为重点,从骨架砂体、油源断裂、不整合面等入手开展输导条件研究,指出区内发育三种油源断裂,建立了斜坡带、断裂带五种输导模式,同时认为涠洲组三段下部油气输导较中上部更为有利;在此基础上,通过刻画断层与盖层匹配关系、主断层断面形态及古今构造叠置关系等方面的研究,指出平面上斜坡带发育2～3个北西-南东向构造脊,断裂带发育1～2个构造脊,构造脊所处位置与断层凸断面叠合,是有利的油气指向区;纵向上,具有"下凸"构造背景及发育油源断层的地区最有利于油气向涠洲组汇聚,但对于涠洲组底部,"下凹上凸"型叠置关系同样可以汇聚成藏。结合输导和汇聚条件的综合研究,指出了不同构造带有利的勘探层系和类型,为迈陈凹陷下步油气勘探提供有力指导。
The condition of hydrocarbon migration and accumulation is one of main control factors of forming reservoir in Maichen Sag. Focusing on the eastern land area of Maichen Sag,we carried out migration condition study from the sand-body framework,source fault and unconformity surface,etc. It is pointed out that there are three types of source fault.Five types of conduit system are set up in slope zone and fault zone. It is considered that the lower part of E_2w_3 has more better migration ability than that of the middle and upper part. According to studies on matching relationship between fault and cap,section morphology of main fault,and superimposition relationship between paleo structure and current structure,it is pointed out that in the plane,2 or 3 structure ridges in NW-SE direction are developed in slope zone,1 or 2 structure ridges are developed in fault zone,and the superimposition between the position of structure ridge and the convex fault plane is favorable for oil and gas accumulation; in the vertical direction,the developed source fault and paleo-high structure area beneath E_2w_3 is the most favorable area of E_2w_3; but for the bottom of E_2w_3,even if there is no paleo-high structure,it can also accumulates gas and oil. Based on the research of migration and accumulation,it is pointed out the favorable exploratory formation and trap type of different structural zone,guiding the next hydrocarbon exploration of Maichen Sag.
The condition of hydrocarbon migration and accumulation is one of main control factors of forming reservoir in Maichen Sag. Focusing on the eastern land area of Maichen Sag,we carried out migration condition study from the sand-body framework,source fault and unconformity surface,etc. It is pointed out that there are three types of source fault.Five types of conduit system are set up in slope zone and fault zone. It is considered that the lower part of E_2w_3 has more better migration ability than that of the middle and upper part. According to studies on matching relationship between fault and cap,section morphology of main fault,and superimposition relationship between paleo structure and current structure,it is pointed out that in the plane,2 or 3 structure ridges in NW-SE direction are developed in slope zone,1 or 2 structure ridges are developed in fault zone,and the superimposition between the position of structure ridge and the convex fault plane is favorable for oil and gas accumulation; in the vertical direction,the developed source fault and paleo-high structure area beneath E_2w_3 is the most favorable area of E_2w_3; but for the bottom of E_2w_3,even if there is no paleo-high structure,it can also accumulates gas and oil. Based on the research of migration and accumulation,it is pointed out the favorable exploratory formation and trap type of different structural zone,guiding the next hydrocarbon exploration of Maichen Sag.
引文
[1]徐建勇,张功成.北部湾盆地古近纪幕式断陷活动规律及其与油气的关系[J].中国海上油气,2011,23(12):363-372.
[2]刘恩涛,王华.北部湾盆地福山凹陷构造转换带及其油气富集规律[J].中南大学学报(自然科学版),2012,43(10):3947-3952.
[3]李洪香,高勇,李会慎,等.歧口凹陷斜坡区油气运聚特征[J].天然气地球科学,2010,21(4):578-583.
[4]陈伟,刘宏宇,侯峰.迈陈凹陷东部构造特征及其对油气成藏的影响[J].复杂油气藏,2013,6(1):17-21.
[5]张景茹,何佳雄.南海北部湾盆地福山凹陷含油气系统与油气运聚成藏规律[J].海洋地质前沿,2012,28(1):31-37.
[6]廖飞燕,马庆林.北部湾盆地福山凹陷古近系流沙港组岩性油气藏勘探[J].中国石油勘探,2015,20(2):43-47.
[7]张照录,王华,杨红.含油气盆地的输导体系研究[J].石油与天然气地质,2000,21(2):133-135.
[8]胡爱玉,陈伟,于雯泉,等.北部湾盆地迈陈凹陷断裂差异发育特征及对油气成藏控制作用[J].地质力学学报,2015,21(3):318-328.
[9]张卫海,查明,曲江秀.油气输导体系的类型及配置关系[J].新疆石油地质,2003,24(2):118-120.
[10]杨淑宏.断裂输导通道类型及输导油气特征[J].大庆石油学院学报,2005,29(2):43-66.
[11]童亨茂,孟令箭,蔡东升,等.裂陷盆地断层的形成和演化-目标砂箱模拟实验与认识[J].地质学报,2009,83(6):759-774.
[12]陈海云,于建国,舒良树,等.济阳坳陷构造样式及其与油气关系[J].高校地质学报,2005,11(4):622-632.
[13]刘惠民.济阳坳陷临南洼陷油气运聚方向与分布规律[J].现代地质,2009,23(5):894-901.
[14]刘宏宇,陈伟,吴峰.断陷盆地油气运聚成藏的动力学模型与方程-以北部湾盆地迈陈凹陷为例[J].石油实验地质,2017,39(6):738-746
[15]张志武,刘志峰.北部湾盆地裂陷期构造及演化特征[J].石油天然气学报,2013,35(1):6-9.
[16]王永诗,杨贵丽,张顺.青东凹陷油气成藏条件再认识[J].中国矿业大学学报,2017,46(5):1116-1125.
[17]王永诗,吴智平.济阳坳陷中-新生代叠合盆地及油气成藏[J].地质科技情报,2009,28(5):53-59.
[18]吴智平,李伟,任拥军,等.济阳坳陷中生代盆地演化及其与新生代盆地叠合关系探讨[J].地质学报,2003,77(2):280-286.
[2]刘恩涛,王华.北部湾盆地福山凹陷构造转换带及其油气富集规律[J].中南大学学报(自然科学版),2012,43(10):3947-3952.
[3]李洪香,高勇,李会慎,等.歧口凹陷斜坡区油气运聚特征[J].天然气地球科学,2010,21(4):578-583.
[4]陈伟,刘宏宇,侯峰.迈陈凹陷东部构造特征及其对油气成藏的影响[J].复杂油气藏,2013,6(1):17-21.
[5]张景茹,何佳雄.南海北部湾盆地福山凹陷含油气系统与油气运聚成藏规律[J].海洋地质前沿,2012,28(1):31-37.
[6]廖飞燕,马庆林.北部湾盆地福山凹陷古近系流沙港组岩性油气藏勘探[J].中国石油勘探,2015,20(2):43-47.
[7]张照录,王华,杨红.含油气盆地的输导体系研究[J].石油与天然气地质,2000,21(2):133-135.
[8]胡爱玉,陈伟,于雯泉,等.北部湾盆地迈陈凹陷断裂差异发育特征及对油气成藏控制作用[J].地质力学学报,2015,21(3):318-328.
[9]张卫海,查明,曲江秀.油气输导体系的类型及配置关系[J].新疆石油地质,2003,24(2):118-120.
[10]杨淑宏.断裂输导通道类型及输导油气特征[J].大庆石油学院学报,2005,29(2):43-66.
[11]童亨茂,孟令箭,蔡东升,等.裂陷盆地断层的形成和演化-目标砂箱模拟实验与认识[J].地质学报,2009,83(6):759-774.
[12]陈海云,于建国,舒良树,等.济阳坳陷构造样式及其与油气关系[J].高校地质学报,2005,11(4):622-632.
[13]刘惠民.济阳坳陷临南洼陷油气运聚方向与分布规律[J].现代地质,2009,23(5):894-901.
[14]刘宏宇,陈伟,吴峰.断陷盆地油气运聚成藏的动力学模型与方程-以北部湾盆地迈陈凹陷为例[J].石油实验地质,2017,39(6):738-746
[15]张志武,刘志峰.北部湾盆地裂陷期构造及演化特征[J].石油天然气学报,2013,35(1):6-9.
[16]王永诗,杨贵丽,张顺.青东凹陷油气成藏条件再认识[J].中国矿业大学学报,2017,46(5):1116-1125.
[17]王永诗,吴智平.济阳坳陷中-新生代叠合盆地及油气成藏[J].地质科技情报,2009,28(5):53-59.
[18]吴智平,李伟,任拥军,等.济阳坳陷中生代盆地演化及其与新生代盆地叠合关系探讨[J].地质学报,2003,77(2):280-286.