断层平面组合样式对盆地砂体沉积的控制作用
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摘要
利用三维地震、钻井、测井等资料,研究渤中凹陷石南断层和沉积体系展布,探讨断层平面组合样式对砂体的控制作用.结果表明:石南断层按走向不同可划分为6条分支断层,相邻分支断层在平面上相交构成"凹"型与"凸"型2种组合样式.研究区沙一+二段沉积期,发育辫状河三角洲、滨浅湖滩坝和湖泊等沉积相类型.在石臼坨凸起上发育多个物源供应方向,断层西端多个规模较小的物源可汇聚在一起,形成辫状河三角洲沉积,向湖盆中央延伸较远,规模较大;断层中部为主体物源供应方向,形成单个规模较大的辫状河三角洲沉积.在断层的"凹"型组合部位,容易形成主物源的进积方向,靠近盆地位置容易聚集砂体,在隆起区沿断层发育的古沟谷是碎屑物质进积的主要通道;在紧邻"凸"型组合样式的盆地区,难以形成较大规模的砂体沉积.该规律对寻找处于勘探初期含油气盆地砂砾岩储集层具有积极的意义.
Using three-dimensional seismic and drilling/logging data,by researching Shinan fault of Bozhong depression and distribution of depositional system,the paper discusses the control of combination patterns of faults over the sandbody.The results show that the Shinan fault can be divided into six parts according to different strikes,and the combination patterns of the intersection of adjacent sections are "concave" and "convex".In the deposit period of S1+2,it developed the braided river delta,shallow lake beach-bar and lake facies.There were some provenance supply direction in the Shijiutuo raised,and several smaller provenance have come together in the west of fault,formed braided delta deposits,extended far to the central basin,and the scale became larger.It was the main provenance material direction in the central fault,and formed a single large scale braided river delta deposition.At the "concave",it is easy to form the progradation of main provenance and gather sandbody near the basin,and in uplifted area,paleovalleys developing along faults are the main pathways of clastic progradation;while at the "convex" it is hard to build up large-scale distribution of sandbody.This finding has positive significance for good prediction of glutinite reservoir at initial stage of exploration in oil-bearing basin.
Using three-dimensional seismic and drilling/logging data,by researching Shinan fault of Bozhong depression and distribution of depositional system,the paper discusses the control of combination patterns of faults over the sandbody.The results show that the Shinan fault can be divided into six parts according to different strikes,and the combination patterns of the intersection of adjacent sections are "concave" and "convex".In the deposit period of S1+2,it developed the braided river delta,shallow lake beach-bar and lake facies.There were some provenance supply direction in the Shijiutuo raised,and several smaller provenance have come together in the west of fault,formed braided delta deposits,extended far to the central basin,and the scale became larger.It was the main provenance material direction in the central fault,and formed a single large scale braided river delta deposition.At the "concave",it is easy to form the progradation of main provenance and gather sandbody near the basin,and in uplifted area,paleovalleys developing along faults are the main pathways of clastic progradation;while at the "convex" it is hard to build up large-scale distribution of sandbody.This finding has positive significance for good prediction of glutinite reservoir at initial stage of exploration in oil-bearing basin.
引文
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[17]李大伟.新构造运动与渤海湾盆地上第三系油气成藏[J].石油与天然气地质,2004,25(2):170-184.
[18]徐杰,马宗晋,邓起东,等.渤海中部渐新世以来强烈沉陷的区域构造条件[J].石油学报,2004,25(5):11-16.
[19]赵国连,赵澄林.渤中凹陷地震-沉积相研究[J].成都理工学院学报,2002,29(1):41-48.
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[21]何仕斌,李丽霞,李建红.渤中拗陷及其邻区第三系沉积特征和油气勘探潜力分析[J].中国海上油气(地质),2001,15(1):61-71.
[22]周毅,张通彩.渤中、渤东凹陷结构认识及有利勘探方向[J].中国海上油气(地质),1997,11(6):432-438.
[23]史冠中,王华,徐备,等.南堡凹陷柏各庄断层活动特征及对沉积的控制[J].北京大学学报:自然科学版(网络版),2010,2:69-74.
[24]张可宝,张红斌,赵玉光,等.均方根振幅与岩性[J].石油地球物理勘探,2007,42(增刊):93-96.
[2]Lezzar K E,Tiercelin J J.Control of normal fault interaction on the distribution of major neogene sedimentary depocenters,lake tan-ganyika,east african rift[J].AAPG Bulletin,2002,86(6):1027-1059.
[3]Mcl eod A E,Underhill J R,Davies S J,et al.The influence of fault array evolution on synrift sedimentation patterns;on depositonin the strathspey-brent-statfjord half graben,northern north sea[J].AAPG Bulletin,2002,86(6):1069-1100.
[4]高志前,樊太亮,薛艳梅,等.塔中地区加里东中期古地貌特征及沉积控制[J].大庆石油学院学报,2007,31(2):21-23,27.
[5]张雁,柳成志,祝秀华,等.杏南地区PI组沉积演化及其砂体控制[J].大庆石油学院学报,2008,32(3):105-107,119.
[6]邓宏文,王红亮,王敦则.古地貌对陆相裂谷盆地层序充填特征的控制——以渤中凹陷西斜坡区下第三系为例[J].石油与天然气地质,2001,22(4):293-296.
[7]徐长贵,赖维成,薛永安,等.古地貌分析在渤海古近系储集层预测中的应用[J].石油勘探与开发,2004,31(5):53-56.
[8]谢玉洪,王振峰,解习龙,等.莺歌海盆地坡折带特征及其对沉积体系的控制[J].地球科学:中国地质大学学报,2004,29(5):569-574.
[9]徐长贵.渤海古近系坡折带成因类型及其对沉积体系的控制作用[J].中国海上油气,2006,18(6):365-370.
[10]徐长贵,赖维成.渤海古近系中深层储层预测技术及其应用[J].中国海上油气,2005,17(4):231-236.
[11]赖维成,徐长贵,于水.渤海海域地质-地球物理储层预测技术及其应用[J].中国海上油气,2006,18(4):217-222.
[12]吴磊,徐怀民,季汉成.渤海湾盆地渤中凹陷古近系沉积体系演化及物源分析[J].洋地质与第四纪地质,2006,26(1):81-87.
[13]渤海石油研究院.渤海湾地区油气形成富集与分布预测[R].天津:渤海石油研究院,2007.
[14]邓运华,李建平.浅层油气藏的形成机理:以渤海油区为例[M].北京:石油工业出版社,2008.
[15]谢武仁,邓宏文,王洪亮,等.渤中凹陷古近系储层特征及其控制因素[J].沉积与特提斯地质,2008,28(3):101-107.
[16]周士科,魏泽典,邓宏文,等.渤中凹陷古近系构造层序研究[J].中国海上油气,2006,18(4):236-240.
[17]李大伟.新构造运动与渤海湾盆地上第三系油气成藏[J].石油与天然气地质,2004,25(2):170-184.
[18]徐杰,马宗晋,邓起东,等.渤海中部渐新世以来强烈沉陷的区域构造条件[J].石油学报,2004,25(5):11-16.
[19]赵国连,赵澄林.渤中凹陷地震-沉积相研究[J].成都理工学院学报,2002,29(1):41-48.
[20]何仕斌,朱伟林,李丽霞.渤中拗陷沉积演化和上第三系储盖组合分析[J].石油学报,2001,22(2):38-43.
[21]何仕斌,李丽霞,李建红.渤中拗陷及其邻区第三系沉积特征和油气勘探潜力分析[J].中国海上油气(地质),2001,15(1):61-71.
[22]周毅,张通彩.渤中、渤东凹陷结构认识及有利勘探方向[J].中国海上油气(地质),1997,11(6):432-438.
[23]史冠中,王华,徐备,等.南堡凹陷柏各庄断层活动特征及对沉积的控制[J].北京大学学报:自然科学版(网络版),2010,2:69-74.
[24]张可宝,张红斌,赵玉光,等.均方根振幅与岩性[J].石油地球物理勘探,2007,42(增刊):93-96.
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