叠合盆地同层多期剥蚀量恢复研究及应用
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摘要
为了恢复叠合盆地同一地层在多个时期(简称"同层多期")的剥蚀量,以地震资料为基础,结合钻井,提出了同一地层在不同时期剥蚀量的恢复方法———同层多期剥蚀量恢复方法,并以该方法恢复了塔里木盆地阿克库勒凸起上奥陶统在加里东中期Ⅲ幕、海西早期的剥蚀厚度及原始沉积厚度。结果表明,阿克库勒凸起上奥陶统地层在加里东中期Ⅲ幕的剥蚀厚度为0~780m、海西早期为0~470m,前者最大剥蚀厚度在轮台断裂附近,后者最大剥蚀厚度沿现今上奥陶统尖灭线分布,原始沉积厚度具有东南厚西北薄的特点。这对重新认识阿克库勒凸起上奥陶统地层的沉积过程和该区的油气成藏史具有重要的意义。
Denudation was ubiquitous in superposition basins,and it was important to study sediment basins from buried history,tectonic evolution history and thermal history to choose correct calculation methods and resume eroded thickness.There were many methods for calculating and resuming eroded thickness.There was preferable effect on eroded thickness in superposition basin,if seismic static integration method was used.The eroded thickness of Upper Ordovician in Ackule uplift was calculated and resumed,the results show that the eroded thickness of Upper Ordovician in Ackule uplift early Hercynian period is 0~470 m,the 3rd stage of mid-Caledonian period is 0~780 m.The maximum erosion thickness of the former is near Luntai fault fracture,the biggest erosion thickness of the latter is distributed along the Ordovician pinchout line,original deposition thickness has the characteristics of thick in the southeast and thin in the northwest.It's of great significant for re-understanding the Ordovician sedimentary process and oil-gas accumulation history of Ackule uplift.
Denudation was ubiquitous in superposition basins,and it was important to study sediment basins from buried history,tectonic evolution history and thermal history to choose correct calculation methods and resume eroded thickness.There were many methods for calculating and resuming eroded thickness.There was preferable effect on eroded thickness in superposition basin,if seismic static integration method was used.The eroded thickness of Upper Ordovician in Ackule uplift was calculated and resumed,the results show that the eroded thickness of Upper Ordovician in Ackule uplift early Hercynian period is 0~470 m,the 3rd stage of mid-Caledonian period is 0~780 m.The maximum erosion thickness of the former is near Luntai fault fracture,the biggest erosion thickness of the latter is distributed along the Ordovician pinchout line,original deposition thickness has the characteristics of thick in the southeast and thin in the northwest.It's of great significant for re-understanding the Ordovician sedimentary process and oil-gas accumulation history of Ackule uplift.
引文
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[3]张小兵,张哨楠,赵锡奎,等.应用地震地层综合法计算叠合盆地剥蚀厚度[J].新疆石油地质,28(3):366~368.
[4]刘景彦,林畅松,喻岳钰,等.用声波测井资料计算剥蚀量的方法改进[J].石油实验地质,2000,22(4):302~307.
[5]Magara K.Thickness of removed sedi ments,paleopore pressure and paleotemperature,southwestern part of Western Canada Basin[J].AAPG,1976,60:54~65.
[6]尹天放.多种信息综合计算剥蚀厚度方法[J].石油勘探与开发,1992,19(5):42~47.
[7]王毅,金之钧.沉积盆地中恢复地层剥蚀量的新方法[J].地球科学进展,1999,14(5):482~486.
[8]刘国臣,金之钧,李京昌.沉积盆地沉积~剥蚀过程定量研究的一种新方法——盆地波动分析应用之一[J].沉积学报,1995,13(3):24~31.
[9]何登发,李德生,童晓光,等.多期叠加盆地古隆起控油规律[J].石油学报,2008,29(4):475~488.
[10]李储华,纪友亮,张世奇,等.应用宇宙成因核素10Be和26Al估算剥蚀面的暴露时间及剥蚀速率和剥蚀厚度[J].石油大学学报(自然科学版),2004,28(1):1~4.
[11]杨立干,陆英,陈平原.高邮凹陷上下第三系之间地层剥蚀量的研究[J].石油天然气学报,2003,25(增刊):33~34.
[12]陈恭洋.地层压实恢复的定量计算[J].石油天然气学报(江汉石油学院学报),1996,18(1):1~6.
[13]徐田武,王英民,魏水建,等.苏北盆地始新统三垛运动剥蚀厚度恢复[J].石油天然气学报,2008,30(6):56~60.
[14]徐国强,刘树根,李国蓉,等.塔中、塔北古隆起形成演化及油气地质条件对比[J].石油与天然气地质,2005,26(1):114~119.
[15]陈发景,汪新文,张光亚,等.新疆塔里木盆地北部构造演化与油气关系[M].北京:地质出版社,1996.
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