大杨树盆地南部坳陷油气成藏条件研究
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摘要
本文在综合利用地震、测井、岩心、重磁、生产测试等相关地质资料基础上,通过对大杨树盆地南部坳陷火山熔岩岩石学特征、岩相类型及特征、地层厚度变化规律进行了研究。了解了火山岩和沉积岩厚度变化规律和岩相分布规律,建立岩相分布成因模式,指出火山岩中的溶蚀孔隙和裂缝是大杨树盆地的主要储层,并对生、储、盖组合特征等进行了深入研究分析。盆地火山岩发育非常广泛,以甘河组沉积时期最为发育,此期盆地几乎都被火山岩所覆盖,龙江组与九峰山组的火山岩与沉积岩呈交互沉积模式。各种类型的火山岩所形成的孔隙与裂缝构成了有利的油气储集层,致密的火山熔岩、凝灰岩、泥质粉砂岩等可以作为良好的盖层。盆地火山岩岩相类型为火山溢流相、火山爆发相、喷发沉积相(包括冲积相和湖沼相),以及其间的过渡类型。火山爆发相山火山角砾岩和角砾熔岩组成,主要分布于火山喷发中心地带。火山溢流相主要为熔岩。包括流纹岩、粗面英安岩和粗面岩。少量粗面安山岩和英安岩。火山沉积相包括凝灰质砂岩和凝灰质泥岩等,分布于火山岩体边缘地带。位于火山爆发相带的岩石,由于爆发时的冲力将顶板及围岩破碎形成大量裂缝和裂纹,同时形成火山角砾岩及火山喷发宁静期的火山熔岩,火山角砾间孔和气孔等原生孔隙发育,是最有利的储集地段。
综合考虑本区构造圈闭条件、与源岩区配置、储集条件、盖层条件以及时空匹配关系等诸多因素,对大杨树盆地南部坳陷进行了有利区带预测。九峰山组湖相沉积岩是目前发现的大杨树盆地南部坳陷主要生烃岩,深坳陷区是主力生烃岩分布区,生成的油气以断裂为通道,向上运移到具备储集条件的圈闭中,由于甘河组下部直接覆盖在九峰山组上段生烃岩上,九峰山组下段有良好的生储盖配置组合,因此,九峰山组和甘河组下部圈闭具有优先捕获油气聚集成藏条件,是有利的油气聚集区;坳陷中心分布的火山岩岩性、构造圈闭是最有利成藏的圈闭。综合分析认为,中部断陷带是最为有利的勘探区带。
By using seism,well logging,core, gravity and magnetic, production test and the other allied data,this paper have researched the lithology character of slag,the rock facies types and characters and the change regulation of stratum thick.The regulation of the thick of sendimentary rock and volcanics and the habitates of lithology facies was cleared,the cause mode of the habitates of lithology facies was buite.This paper indicated that the emposieu and the fracture was the main reservoir of Dayangshu basin.The surce rock-reservoir-cap bed group was also analysed in this paper.The volcanics developed in the vast of the basin particularly in the time of Ganhe group sendimented, in that time,the whole basin was capped by volcanics, while in the time of Longjiang and Jiufengshan group sendimented, the volcanics and sendimentary rocks developed alternately.Many types of volcanics pore and the fracture formed the beneficial hydrocarbon reservoir, while the dense slag, volcanic tuff and pelitic siltstone could be well cap bed. The volcanics lithology types were overflow face, the burst face the burst sendimentary face(including alluvion face and lacustrine bog face) and the pass through types. The burst face was composed by auto brecciated lava and and lava and habitated around the center of volcanic.The overflow face was mainly composed by the lava, including rhyolite, trachydacit and mixpah. The volcanics sendimentary face was composed by tuffaceous sandstone and tuffaceous mud and habitated by the edge of volcanics. The rocks of buest face, caused by the power of burst, could broke the cap rock and the surrounding rock and then buite vast fractures, at the same time, the auto brecciated lava and the lava were formed. The hole developed in the auto brecciated lava which was the beneficial reservoir.
This paper forecased the beneficial area of northern Dayangshu basin by using the structural trap condition, the sorce rock, reservoir, cap bed condition and there matching condition.The lake face sendimentary rock was the main sorce rock in the northern depression in Dayangshu basin and it habitated mainly in the deep depression area. The hydrocarbon formed migrated up to the traps with well rseserve condition by using the fault as aisle. Because the bottom Ganhe group capped the upper Jiufengshan group sorce rock, the bottom Jiufengshan group had a well sorce-reservoir-cap combined condition. So, the traps in Jiufengshan group and the bottom Ganhe group had the priority to pray hydrocarbon and was the beneficial hydrocarbon assemble area. The lithology and structure traps habitated in the center of depression was the best trap. By synthesize analyse, the middle fault depression belt was the best exploration area.
综合考虑本区构造圈闭条件、与源岩区配置、储集条件、盖层条件以及时空匹配关系等诸多因素,对大杨树盆地南部坳陷进行了有利区带预测。九峰山组湖相沉积岩是目前发现的大杨树盆地南部坳陷主要生烃岩,深坳陷区是主力生烃岩分布区,生成的油气以断裂为通道,向上运移到具备储集条件的圈闭中,由于甘河组下部直接覆盖在九峰山组上段生烃岩上,九峰山组下段有良好的生储盖配置组合,因此,九峰山组和甘河组下部圈闭具有优先捕获油气聚集成藏条件,是有利的油气聚集区;坳陷中心分布的火山岩岩性、构造圈闭是最有利成藏的圈闭。综合分析认为,中部断陷带是最为有利的勘探区带。
By using seism,well logging,core, gravity and magnetic, production test and the other allied data,this paper have researched the lithology character of slag,the rock facies types and characters and the change regulation of stratum thick.The regulation of the thick of sendimentary rock and volcanics and the habitates of lithology facies was cleared,the cause mode of the habitates of lithology facies was buite.This paper indicated that the emposieu and the fracture was the main reservoir of Dayangshu basin.The surce rock-reservoir-cap bed group was also analysed in this paper.The volcanics developed in the vast of the basin particularly in the time of Ganhe group sendimented, in that time,the whole basin was capped by volcanics, while in the time of Longjiang and Jiufengshan group sendimented, the volcanics and sendimentary rocks developed alternately.Many types of volcanics pore and the fracture formed the beneficial hydrocarbon reservoir, while the dense slag, volcanic tuff and pelitic siltstone could be well cap bed. The volcanics lithology types were overflow face, the burst face the burst sendimentary face(including alluvion face and lacustrine bog face) and the pass through types. The burst face was composed by auto brecciated lava and and lava and habitated around the center of volcanic.The overflow face was mainly composed by the lava, including rhyolite, trachydacit and mixpah. The volcanics sendimentary face was composed by tuffaceous sandstone and tuffaceous mud and habitated by the edge of volcanics. The rocks of buest face, caused by the power of burst, could broke the cap rock and the surrounding rock and then buite vast fractures, at the same time, the auto brecciated lava and the lava were formed. The hole developed in the auto brecciated lava which was the beneficial reservoir.
This paper forecased the beneficial area of northern Dayangshu basin by using the structural trap condition, the sorce rock, reservoir, cap bed condition and there matching condition.The lake face sendimentary rock was the main sorce rock in the northern depression in Dayangshu basin and it habitated mainly in the deep depression area. The hydrocarbon formed migrated up to the traps with well rseserve condition by using the fault as aisle. Because the bottom Ganhe group capped the upper Jiufengshan group sorce rock, the bottom Jiufengshan group had a well sorce-reservoir-cap combined condition. So, the traps in Jiufengshan group and the bottom Ganhe group had the priority to pray hydrocarbon and was the beneficial hydrocarbon assemble area. The lithology and structure traps habitated in the center of depression was the best trap. By synthesize analyse, the middle fault depression belt was the best exploration area.
引文
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[2] Perrodon A,Geodynamique petroliere:genese et repartition des gisementsd,hydrocarbures [M].Paris,Masaon-Eif-Aquitaine,1980,38:181～190
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[4] Meissner F F ,1 Petroleum geology of Bakken Formation,Williston basi in ,North Dakota and Montana,in G.Demaison and R J Murris,ed, Petroleum geochemistry and basin evaluation[M].AAPG M 俄 emoir,1984,35:159～179.
[5] Vlmishek G ,Stratigraphic aspects of petroleum resource assessment,in D D Ricee,Oil and gas assessment-methods and applications[M].AAPG Studies in Geology,1986,21:1～59.
[6] Magoon L B,The petroleum system-a classification scheme for research,resource assessme nt,and exploration (abs)[M].AAPG Bulletin,1987,71(5):587～590.
[7] Demaison G,and B J Huizinga, Genetic classification of Petroleum systems [M].AAPG Bulletin,1991,75(10):1626～1643.
[8] Perrodon A,Geodynamique des bassins sedimentairs et systems pertro liere[M].Bulletin des Centres de Recherches Exploration-Production Eif-Aquitaine,1983,7:645～676.
[9] L B 马贡,W G 道.含油气系统-从烃源岩到圈闭[M].石油工业出版社,1998:293～305.
[10] 宋国奇.成藏理论研究中的系统论[J].石油与天然气质,2003,24(2):111～115.
[11] 郝芳,邹华耀,王敏芳,等.油气成藏机理研究进展和前沿研究领域[J].地质报,2002,21 (4):7～14.
[12] 黑龙江省及呼盟地区沉积盆地石油地质调查报告[R].大庆勘探开发研究院,1987:1 ～20.
[13] 黑龙江省大杨树盆地南部坳陷地震概查勘探成果报告[R].大庆石油管理局地球物理 勘探公司,2000,1～156.
[14] 冯子辉,钟瑞.大杨树盆地原油显示及其地球化学特征[J].石油勘探与开发,2001,28(2) :1～3.
[15] 李思田,路凤香,林畅松,等.中国东部及邻区中、新生代盆地演化及地球动力学背景 [M].中国地质大学出版社,1997:77～86.
[16] 徐开礼,朱志澄.构造地质学[M].地质出版社,1989:207～229.
[17] 赵澄林,朱筱敏.沉积岩石学[M].2001:139～146.
[18] 杨懋新.松辽盆地断陷期火山岩的形成及成藏条件[J].大庆石油地质与开发,2002,21 (5):1～5.
[19] 郭齐军,焦守诠,万智民,等.火山岩储层的岩石学评价[J].特种油气藏,1995,2(3) :6～9.
[20] 邵正奎,孟宪禄,王洪艳,等.松辽盆地火山岩地震反射特征及其分布规律[J]. 长春科技 大学学报,1999,29(1):1～4.
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