中国南海地区环状断层成因及其对天然气向斜构造成藏模式的控制
|
摘要
在背斜构造型气藏大都被发现并开发的今天,随着勘探构造类型的转变,在中国南海地区莺歌海盆地中发现了新型的向斜构造气藏。这种向斜构造受向斜内环状断层控制成藏,分别形成了LD气田及CN气田。其内的2个环状断层构造的发育为2种完全不同的地质成因,尤其是LD气田,形成了世界罕见的平面上呈规则圆环状发育的断层。利用地震资料的可视化优势,对CN构造及LD构造环状断层的特征及地质成因进行了详尽的分析描述。通过LD气田及CN气田的成藏条件分析,认为该区环状断层是油气运移的主要通道,并且环状断层对储层形成侧封,在向斜构造中形成圈闭并且成藏。此次研究该地区油气勘探提供了新的研究思路,并且这2个气田的成功发现为天然气勘探领域提供了新的方向。
While most gas reservoirs in anticlinal structures had been discovered and developed,a new structural type of gas reservoir,synclinal structure,has been discovered in the Yinggehai basin of South China Sea.Gas accumulation in such a synclinal structure is controlled by ring fault within the structure,such as the cases in the LD and CN gas fields.Two ring fault structures respectively in the two gas fields have completely different geologic origins,particularly in the LD gas field where had developed a regular ring fault which is rare in the world.With the advantage of visible seismic data,this paper scrutinizes the characteristics and geological origins of the ring faults in the LD and CN structure.Analysis of gas accumulation conditions in the two gas fields indicates that the ring faults offered dominant passage of hydrocarbon migration and constituted reservoir side seal,thus formed trap and gas accumulation in the synclinal structure.This research provides new ideas for oil and gas exploration in this area;and the successful discovery of these two gas fields provides a new way of gas exploration.
While most gas reservoirs in anticlinal structures had been discovered and developed,a new structural type of gas reservoir,synclinal structure,has been discovered in the Yinggehai basin of South China Sea.Gas accumulation in such a synclinal structure is controlled by ring fault within the structure,such as the cases in the LD and CN gas fields.Two ring fault structures respectively in the two gas fields have completely different geologic origins,particularly in the LD gas field where had developed a regular ring fault which is rare in the world.With the advantage of visible seismic data,this paper scrutinizes the characteristics and geological origins of the ring faults in the LD and CN structure.Analysis of gas accumulation conditions in the two gas fields indicates that the ring faults offered dominant passage of hydrocarbon migration and constituted reservoir side seal,thus formed trap and gas accumulation in the synclinal structure.This research provides new ideas for oil and gas exploration in this area;and the successful discovery of these two gas fields provides a new way of gas exploration.
引文
[1]吴月先,张仕强,等.特种油气藏地质特征[J].特种油气藏,2008,15(3):1-8.
[2]赵密福,冯丽春,等.渤海湾盆地东营背斜构造塌陷成藏机制研究[J].石油实验地质,2004,26(6):547-551.
[3]董玉红.三肇凹陷向斜区葡萄花油层油气成藏模式[J].科学技术与工程,2010,10(29):7142-7146.
[4]刘薇薇,周家雄,等.LD气田环形断层成因探讨与勘探潜力分析[J].内蒙古石油化工,2009,19(23):133-137.
[5]科斯特罗夫B B.构造地震震源力学[M].北京:地震出版社,1979:36-63.
[6]罗群.断裂控烃理论与油气勘探实践[J].地球科学——中国地质大学学报,2002,27(6):751-756.
[7]陈萍.海拉尔盆地苏仁诺尔弧形断裂结构与油藏类型[J].特种油气藏,2011,18(4):46-48.
[8]刘景东,蒋有录.断面优势运移通道的有效性及其对油气的控制作用[J].特种油气藏,2011,18(3):47-50.
[9]马金龙,张宝权.汤原断陷构造沉积特征与油气成藏分布规律[J].石油实验地质,2006,28(3):220-224.
[10]苏宪锋.渤海湾盆地新北油田油气成藏主控因素分析[J].特种油气藏,2010,17(2):31-34.
[11]黄龙威.极复杂断块油田微型构造研究方法及应用[J].特种油气藏,2011,18(2):11-13.
[12]李明诚.油气运移基础理论与油气勘探[J].地球科学——中国地质大学学报,2004,29(4):7-14.
[13]鲁兵,陈章明.断面活动特征及其对油气的封闭作用[J].石油学报,1996,17(3):34-37.
[2]赵密福,冯丽春,等.渤海湾盆地东营背斜构造塌陷成藏机制研究[J].石油实验地质,2004,26(6):547-551.
[3]董玉红.三肇凹陷向斜区葡萄花油层油气成藏模式[J].科学技术与工程,2010,10(29):7142-7146.
[4]刘薇薇,周家雄,等.LD气田环形断层成因探讨与勘探潜力分析[J].内蒙古石油化工,2009,19(23):133-137.
[5]科斯特罗夫B B.构造地震震源力学[M].北京:地震出版社,1979:36-63.
[6]罗群.断裂控烃理论与油气勘探实践[J].地球科学——中国地质大学学报,2002,27(6):751-756.
[7]陈萍.海拉尔盆地苏仁诺尔弧形断裂结构与油藏类型[J].特种油气藏,2011,18(4):46-48.
[8]刘景东,蒋有录.断面优势运移通道的有效性及其对油气的控制作用[J].特种油气藏,2011,18(3):47-50.
[9]马金龙,张宝权.汤原断陷构造沉积特征与油气成藏分布规律[J].石油实验地质,2006,28(3):220-224.
[10]苏宪锋.渤海湾盆地新北油田油气成藏主控因素分析[J].特种油气藏,2010,17(2):31-34.
[11]黄龙威.极复杂断块油田微型构造研究方法及应用[J].特种油气藏,2011,18(2):11-13.
[12]李明诚.油气运移基础理论与油气勘探[J].地球科学——中国地质大学学报,2004,29(4):7-14.
[13]鲁兵,陈章明.断面活动特征及其对油气的封闭作用[J].石油学报,1996,17(3):34-37.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心