平面低角度断裂切割关系组合与解析
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摘要
海中凹陷东区断裂切割复杂,层位和断层闭合困难。依据区域构造应力场与区域断裂走向的匹配关系,从断裂识别入手,对地震资料进行保边滤波处理,提取等时相干切片,对F2断层进行识别。依据平衡剖面原理,逐层回剥,反演各时期的构造变化,F1断层形成时期晚于F2断层;在平面上,F2断层东段与F1断层呈低角度切割,近平行切割;在剖面上,F1断层、F2断层倾向相反,形成"X"型断裂。上述方法解决了研究区层位闭合困难的问题,迂回追踪的层位解释可靠,断裂组合合理,扩大了圈闭规模,具有较大的勘探现实意义。
It was difficult to close the horizons and faults because of fracture cutting complex relationship in the eastern area of Haizhong Depression.According to the match relations between the regional tectonic stress field and faults strike,starting from the fault identification,the coherent slice was extracted after the seismic data were processed with edge preserving filtering,Fault F2 was identified.Based on the principle of balanced section,the inversion of tectonic changes of each period was carried out by back stripping tectonics,the formation period of Fault F1 was later than F2,F1 was nearly parallel to the cutting section in the eastern part of Fault F2 in plane.Faults F1 and F2 were on the opposite in tendency and against each other,they formed"X"type fracture.The above method solves the problem of the difficulty of horizon closure in the study area.It is of great practical significance for exploration because of the reliable interpretation of the detour tracing the reasonable fault combination and the enlargement of the trap scale.
It was difficult to close the horizons and faults because of fracture cutting complex relationship in the eastern area of Haizhong Depression.According to the match relations between the regional tectonic stress field and faults strike,starting from the fault identification,the coherent slice was extracted after the seismic data were processed with edge preserving filtering,Fault F2 was identified.Based on the principle of balanced section,the inversion of tectonic changes of each period was carried out by back stripping tectonics,the formation period of Fault F1 was later than F2,F1 was nearly parallel to the cutting section in the eastern part of Fault F2 in plane.Faults F1 and F2 were on the opposite in tendency and against each other,they formed"X"type fracture.The above method solves the problem of the difficulty of horizon closure in the study area.It is of great practical significance for exploration because of the reliable interpretation of the detour tracing the reasonable fault combination and the enlargement of the trap scale.
引文
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[2]胡望水,吴婵,梁建设,等.北部湾盆地构造迁移特征及对油气成藏的影响[J].石油与天然气地质,2011,32(6):921~925.
[3]徐建永,张功成,梁建设,等.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(6):362~367.
[4]张智武,刘志峰,张功成,等.北部湾盆地裂陷期构造及演化特征[J].石油天然气学报(江汉石油学院学报),2013,35(1):6~10.
[5]朱伟林,江文荣.北部湾盆地涠西南凹陷断裂与油气藏[J].石油学报,1998,19(3):6~9.
[6]罗群,白新华,张树林.“复杂地区地震资料解释技术”及其在汤原断陷的应用[J].石油实验地质,1998,20(1):30~34.
[7]刘海燕.C3相干算法的改进及其中断层识别中的应用北部湾盆地石油地质[D].长春:吉林大学,2013.
[8]陈国飞,吕双兵.RGB分频技术在断块油藏断层识别中的应用[J].复杂油气藏,2015,8(2):29~32.
[9]李海亮,陈启林,朱允辉,等.波形分析技术在识别小断层和剥蚀线中的应用[J].新疆石油地质,2007,28(2):232~233.
[10]刘显太,李军,王军,等.低序级断层识别与精细描述技术研究[J].特种油气藏,2013,20(1):44~46.