永新地区断裂系统与成藏关系研究
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摘要
永新地区具有较大的油气资源潜力,但该区断裂系统十分复杂,断裂演化及其与油气成藏关系不清。本文在前人研究基础上,以构造地质学、石油地质学等理论为指导,综合利用高精度三维地震、测井、分析化验等资料,对永新地区的断裂几何学、断裂演化、油气成藏要素进行了研究,综合分析了断裂与油气成藏关系,对于充分挖掘永新地区的勘探开发潜力、减小勘探风险具有一定意义,并可以为下步勘探部署提供参考。
从三维地震资料入手,定量研究了永新地区断裂系统的几何学特征和活动特征。研究区断裂十分发育,二级断层主要为东西、北东东、北西西三个走向,三级断层主要走向为南北和东西走向,次要走向为北东和北西走向,四级断层走向比较均匀;通过对研究区断裂活动和演化剖面研究,得出古近纪伸展运动明显,大量断裂在此期形成并发展,新近纪后盆地进入坳陷演化阶段,断裂活动减弱并逐渐停止活动。
综合利用钻井、测井、地化资料研究了永新地区的油气成藏要素,确定主力烃源岩为沙四上亚段和沙三中、下亚段的泥页岩,储集层为沙三上、沙二下、沙二上亚段的细砂岩及粉砂岩以及沙四、沙三下亚段的浊积砂砾岩体,盖层为沙一段和眀化镇组泥岩。
利用多种方法,确定了民丰洼陷和中央隆起带烃源岩成藏期,永安镇油田主要油源断层活动是油气运移的重要通道;新立村油田仅有部分断层是油气运移的通道,砂体和断层构成永新地区立体输油网络,区域性盖层和断层联合封堵油气有利于油气的保存。
There is great potential for oil and gas resources in Yongxin area, but fracture system is very complicated, fracture evolution and its relationship with oil and gas accumulation is unclear. In this paper, at the base of previous studies, guided by structural geology, petroleum geology, comprehensive utilization of high-precision three-dimensional seismic, logging, analysis data, fracture geometry, fracture evolution, hydrocarbon accumulation elements were researched, relationship between fracture and hydrocarbon accumulation were comprehensive analyzed, it is important for digging exploration and development potential, reducing the exploration risk, and providing reference materials for the next step exploration.
From 3D seismic data, fracture geometry characteristics and activity characteristics were researched quantitative in Yongxin area. There are a lot of fractures in study area, including the second class fault which contains tree trend: EW, NEE, NWW, the third class fault which contains NS, EW, secondary to NE, NW trend, the fourth fault contains all of direction trend. Studied by fracture activity and evolution, we get that stretching exercises was significant in ancient Tertiary, in which large fractures were formed, basin evolution stepped into the depression stage, in which fractures activity weakened and stopped gradually.
Comprehensive utilization of drilling, logging, geochemical data, hydrocarbon accumulation elements were studied in study area, we get mudstone in the upper part of the fourth member of Shahejie formation, the middle part of the third member of Shahejie formation, and the lower part of the third member of Shahejie formation is major source rocks; fine sandstone and siltstone in the upper part of the third member of Shahejie formation, the second member of Shahejie formation and turbidite glutenite in the fourth member of Shahejie formation, the lower part of the third member of Shahejie formation is reservoir; mudstone in the first member of Shahejie formation and Minghuazhen formation is cap rock.
Using various methods, we determined accumulation period in the Minfeng depression and the central uplift, main fault is an important way for oil and gas migration in Yonganzhen oil field, only part of fault is the way for oil and gas migration in Xinlicun oil field, sandstone and fault constitute three-dimensional oil network of oil and gas migration, the regional cap rock and fault preserved oil and gas together.
从三维地震资料入手,定量研究了永新地区断裂系统的几何学特征和活动特征。研究区断裂十分发育,二级断层主要为东西、北东东、北西西三个走向,三级断层主要走向为南北和东西走向,次要走向为北东和北西走向,四级断层走向比较均匀;通过对研究区断裂活动和演化剖面研究,得出古近纪伸展运动明显,大量断裂在此期形成并发展,新近纪后盆地进入坳陷演化阶段,断裂活动减弱并逐渐停止活动。
综合利用钻井、测井、地化资料研究了永新地区的油气成藏要素,确定主力烃源岩为沙四上亚段和沙三中、下亚段的泥页岩,储集层为沙三上、沙二下、沙二上亚段的细砂岩及粉砂岩以及沙四、沙三下亚段的浊积砂砾岩体,盖层为沙一段和眀化镇组泥岩。
利用多种方法,确定了民丰洼陷和中央隆起带烃源岩成藏期,永安镇油田主要油源断层活动是油气运移的重要通道;新立村油田仅有部分断层是油气运移的通道,砂体和断层构成永新地区立体输油网络,区域性盖层和断层联合封堵油气有利于油气的保存。
There is great potential for oil and gas resources in Yongxin area, but fracture system is very complicated, fracture evolution and its relationship with oil and gas accumulation is unclear. In this paper, at the base of previous studies, guided by structural geology, petroleum geology, comprehensive utilization of high-precision three-dimensional seismic, logging, analysis data, fracture geometry, fracture evolution, hydrocarbon accumulation elements were researched, relationship between fracture and hydrocarbon accumulation were comprehensive analyzed, it is important for digging exploration and development potential, reducing the exploration risk, and providing reference materials for the next step exploration.
From 3D seismic data, fracture geometry characteristics and activity characteristics were researched quantitative in Yongxin area. There are a lot of fractures in study area, including the second class fault which contains tree trend: EW, NEE, NWW, the third class fault which contains NS, EW, secondary to NE, NW trend, the fourth fault contains all of direction trend. Studied by fracture activity and evolution, we get that stretching exercises was significant in ancient Tertiary, in which large fractures were formed, basin evolution stepped into the depression stage, in which fractures activity weakened and stopped gradually.
Comprehensive utilization of drilling, logging, geochemical data, hydrocarbon accumulation elements were studied in study area, we get mudstone in the upper part of the fourth member of Shahejie formation, the middle part of the third member of Shahejie formation, and the lower part of the third member of Shahejie formation is major source rocks; fine sandstone and siltstone in the upper part of the third member of Shahejie formation, the second member of Shahejie formation and turbidite glutenite in the fourth member of Shahejie formation, the lower part of the third member of Shahejie formation is reservoir; mudstone in the first member of Shahejie formation and Minghuazhen formation is cap rock.
Using various methods, we determined accumulation period in the Minfeng depression and the central uplift, main fault is an important way for oil and gas migration in Yonganzhen oil field, only part of fault is the way for oil and gas migration in Xinlicun oil field, sandstone and fault constitute three-dimensional oil network of oil and gas migration, the regional cap rock and fault preserved oil and gas together.
引文
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[2] Mondt J C. The use of dip and azimuth horizon attributes in 3-D seismic interpretation [J]. SPE,1990,209(43):71~77.
[3] Kurt J,Marfurtr L,Lynn K, et al.. 3-D seismic attributes using a semblance- based coherency algorithm[J]. Geophysics,1998,63(4):1150~1165.
[4]张军华,朱焕,高荣涛,周振晓.地震复合属性地震属性提取与解释新方法[J].新疆石油地质,2007,28(4):494~496.
[5]边树涛,董艳蕾.地震相干体技术识别低序级断层方法研究[J].世界地质,2007,26(3):368~373.
[6]何少勇.胜利滨海地区新构造运动特征及其与油气成藏的关系.中国石油大学硕士学位论文,2008:1~83.
[7]陆克政.构造地质学教程[M].山东东营:石油大学出版社,1996:151~156.
[8]李勤英,罗凤芝,苗翠芝.断层活动速率研究方法及应用探讨[J].断块油气田,2000,7(2):15~17.
[9]赵勇,戴俊生.应用落差分析研究生长断层[J].石油勘探与开发,2003,30(3):13~15.
[10]王书宝,钟建华,陈志鹏.惠民凹陷新生代断裂活动特征研究[J].地质力学学报,2007,13(1):86~96.
[11]陈志鹏.松辽盆地齐家北地区青山口组构造特征及其对沉积的控制作用.中国石油大学硕士学位论文,2009:1~91.
[12] Dahlstrom C D A. Balanced cross sections [J]. Canadian Journal of Earth Sciences,1969,6(4):743~757.
[13]岳华,张洪波,李仁甫. Geosec平衡剖面技术在M盆地构造研究中的应用[J].勘探地球物理进展,2002,25(4):49~52.
[14]张进铎.平衡剖面技术在国内外油气勘探中的最新应用[J].地球物理学进展,2007,22(6):1856~1861.
[15]程海生,杨风丽.油气田断层封闭性综述[J].特种油气藏,2008,15(1):6~20.
[16]王平.论断层封闭的广泛性、相对性和易变性复杂断块油形成条件系列论文之二[J].断块油气田,1994,1(1):3~10.
[17]吕延防,李国会,王跃文.断层封闭性的定量研究方法[J].石油学报,1996,17(3):39~45.
[18]王志欣,信荃麟.关于地下断层封闭性的讨论以东营凹陷为例[J].高校地质学报,1997,3(3):293~300.
[19]徐守余,李学艳.胜利油田东营凹陷中央隆起带断层封闭模式研究[J].地质力学学报,2005,11(1):19~24.
[20]刘伟,窦齐丰,王韶华.断层封闭性综合分析方法[J].新疆石油地质,2003,24(4):289~291.
[21]刘伟,贾中,李丽.复杂断块油气田断层封闭性综合分析方法[J].断块油气田,2002,9(1):25~28.
[22]解秋红.卞闵地区构造样式研究.中国石油大学硕士学位论文,2008
[23]孟建华.马寨油田卫305块油藏精细描述.西南石油学院硕士学位论文,2005.
[24]施立志.库车凹陷流体动力演化与流体演变史研究.西北大学硕士论文,2004.
[25]宋来明,贾达吉,徐强,王志君.断层封闭性研究进展.煤田地质与勘探,2006,36(5):13~16.
[26]曾红,许永强,杨小波,单长冰.胡状集油田断层封闭性研究.资源调查和环境,2009,30(4):254~262.
[27]张吉,张烈辉,杨辉廷,南力亚.断层封闭机理及其封闭性识别方法.河南石油,2003,17(3):7~9.
[28]蒋有录,刘振,史文东,马士忠,张允建.永安镇油气田成藏地质条件与油气富集规律[J].石油大学学报(自然科学版),1995,19(6):16~20.
[29]陈清华,王绍兰.永安镇油田构造沉积特征与油气关系[J].岩相古地理,1998,18(3):14~20.
[30]陈清华,吴孔友,王绍兰.永安镇油田构造特征[J].石油大学学报(自然科版),1998,22(5):23~25.
[31]刘利.东营凹陷永安镇断裂带气藏成藏规律研究[J].特种油气藏,2006,13(2):29~32.
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