垦东地区成藏规律及勘探目标研究
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摘要
本文通过对垦东地区构造特征、地层特征和储层特征的研究,从油气运聚、储盖组合、油藏类型及分布和油气控制因素等方面对成藏规律进行了综合分析,最终明确了近期勘探部署思路。垦东凸起位于郯庐断裂带西缘,沾化凹陷的东部,是一个在前第三系潜山背景上发育起来得新近系披覆、古近系超覆的高潜山披覆构造带,具有构造样式多样、油气分布各异的特点。根据其区域应力场,郯庐断裂带在新生代右旋走滑及其产生的拉分作用影响下,垦东凸起的演化过程形成了垦东北部斜坡带、西部主体带和东部斜坡带三个次级构造单元和不同的构造样式。该区主力含油层系为馆上段曲流砂坝,由于河道不断迁移,形成单个砂体横向变化较大,对比关系复杂。各砂体间多为互不连通,纵向上多期砂体迭合,相互穿插,平面上砂体迭合连片分布,曲流河流经垦东地区的概率性走向为北北东向。上覆地层没有油气生成能力,结合生物标志化合物,展开油源对比研究,明确了本区有四种油源。即西部的孤南-富林洼陷油源、北部的桩东凹陷油源、东部的莱州湾凹陷和南部的青东凹陷油源,其中北部的桩东凹陷油源是主要的。原油通过垦东断裂带及北北东走向走滑断裂带垂向运移、馆下段横向运移到凸起的高部位,在馆陶组-明化镇组聚集成藏,成藏模式可以总结为,它源垂向运移网毯式成藏,形成了三个有效运聚成藏系统。垦东地区油气分布呈现明显的规律性,具有不同的油气输导方式和油气藏类型,北部斜坡带油气呈“立体式”输导,形成构造一岩性油气藏;西部主体带油气呈“网毯式”输导,形成古背景上的岩性油气藏;东部斜坡带油气呈“阶梯式”输导,形成断层一岩性油气藏,三个次级构造区油气聚集各具特色。根据对垦东地区成藏规律的研究及勘探现况分析,确定了垦东地区近期勘探部署的三个层次:评价与滚动相结合,扩大西部主体的含油范围,尽快实现叠合含油连片;甩开评价东部斜坡带五排反向断块山;探索中古生界潜山,力争突破出油关,形成一个千万吨级的储量接替阵地。
By way of the study of the structural characteristic, stratigraphic characteristic and reservior characteristic in Kendong area, this paper synthetically analysises the reservior formation regulation in aspect of the oil & gas gathering, reservoir-cap assemblages, reservior style and distribution, and control factor of oil & gas. Finally, the exploration deployments are difinitized.The Kendong uplift locates on the west edge of Tan-Lu fault belt, the eastern of Zhanhua depression. It is a higher buried-hill drape structural belt developped on the background of the pre-Tertiary buried hills, which has the characteristic of various structural style and diversiform oil & gas distribution. In terms of the regional stress field characteristic, by the influeced of the right-lateral strike-slip and the produced dextralpull-apart of Tanlu fault zone, the Kendong uplift evolved into different structural styles and three secondary structural units, that is the northern, western and eastern slope zones.The point-bar of upper Guantao formation if the mainly oil-bearing series. The sigle-sandstone body formed by the riverway transfer has the large lateral variation and complex comparative relation. The disconnective sandstone bodies are superpose and interlude in vertical and overlapp-linked in landscape orientation. Intergrated with the biomarker, the oil source correlation revealed four oil source in this area, that is the western Gunan-Fulin oil source, the northern Zhuangdong oil source, the eastern Laizhouwan oil source and the southern Qingdong oil source. Thereinto, the northern Zhuangdong oil source is the mainly oil source in this area. The oil vertical migrated by the Kendong faults belt and the NNE strike-slip faults belt, and migrated by the super Guantao formation in landscape orientation. Finally, the oil migrated to the higher position of the uplift and accumulated in Guantao-Minghuazhen formation. The reservior formation mode is exo-source, verticle migration and meshwork-carpet pool-forming mode, which formed three effective migration accumulation system.The obvious regulation consist in the oil distribution of Kendong area and the hydrocarbon migration and accumulation styles in three slope zones are different.Hydrocarbon migrates in space form and a structural-lithologic pool is formed in the northern slope zone.Hydrocarbon migrates in net carpet form and a lithologic pool is formed on ancient physiognomy in the western uplift zone.Hydrocarbon migrates in ladder form and a fault-lithologic pool is formed in the eastern slope zone.Based on the research of the reservoir formation regulation and the analysis of the exploration status, three arrangement of farther exploration in Kendong area are confirmed. The first is the conbining of evaluating and roll-exploration, enlarging the oil-bearing area of the wester zone, and achieving the united oil-bearing area. The second is the evaluating the five fault block in eastern slop zone, exclusively. The third is the probing the mesozoic and paleozoic buried-hill, and forming a multimillion ton grade reserves position.
By way of the study of the structural characteristic, stratigraphic characteristic and reservior characteristic in Kendong area, this paper synthetically analysises the reservior formation regulation in aspect of the oil & gas gathering, reservoir-cap assemblages, reservior style and distribution, and control factor of oil & gas. Finally, the exploration deployments are difinitized.The Kendong uplift locates on the west edge of Tan-Lu fault belt, the eastern of Zhanhua depression. It is a higher buried-hill drape structural belt developped on the background of the pre-Tertiary buried hills, which has the characteristic of various structural style and diversiform oil & gas distribution. In terms of the regional stress field characteristic, by the influeced of the right-lateral strike-slip and the produced dextralpull-apart of Tanlu fault zone, the Kendong uplift evolved into different structural styles and three secondary structural units, that is the northern, western and eastern slope zones.The point-bar of upper Guantao formation if the mainly oil-bearing series. The sigle-sandstone body formed by the riverway transfer has the large lateral variation and complex comparative relation. The disconnective sandstone bodies are superpose and interlude in vertical and overlapp-linked in landscape orientation. Intergrated with the biomarker, the oil source correlation revealed four oil source in this area, that is the western Gunan-Fulin oil source, the northern Zhuangdong oil source, the eastern Laizhouwan oil source and the southern Qingdong oil source. Thereinto, the northern Zhuangdong oil source is the mainly oil source in this area. The oil vertical migrated by the Kendong faults belt and the NNE strike-slip faults belt, and migrated by the super Guantao formation in landscape orientation. Finally, the oil migrated to the higher position of the uplift and accumulated in Guantao-Minghuazhen formation. The reservior formation mode is exo-source, verticle migration and meshwork-carpet pool-forming mode, which formed three effective migration accumulation system.The obvious regulation consist in the oil distribution of Kendong area and the hydrocarbon migration and accumulation styles in three slope zones are different.Hydrocarbon migrates in space form and a structural-lithologic pool is formed in the northern slope zone.Hydrocarbon migrates in net carpet form and a lithologic pool is formed on ancient physiognomy in the western uplift zone.Hydrocarbon migrates in ladder form and a fault-lithologic pool is formed in the eastern slope zone.Based on the research of the reservoir formation regulation and the analysis of the exploration status, three arrangement of farther exploration in Kendong area are confirmed. The first is the conbining of evaluating and roll-exploration, enlarging the oil-bearing area of the wester zone, and achieving the united oil-bearing area. The second is the evaluating the five fault block in eastern slop zone, exclusively. The third is the probing the mesozoic and paleozoic buried-hill, and forming a multimillion ton grade reserves position.
引文
[1]张文佑.华北断块区的形成与发展.北京:科学出版社,1980
[2]赵重远.渤海湾盆地的构造格局及其演化[J].石油学报,1984,5(1):1-8
[3]侯贵廷,钱祥麟,蔡东升.渤海湾盆地中、新生代构造演化研究.北京大学学报:自然科学版,2001,37(6):845-851.
[4]付兆辉,李敏.郯庐断裂对垦东地区构造和成藏的影响.海洋石油,2005,25(2):15-19
[5]方旭庆.试论走滑运动对垦东地区油气聚集的影响.河南石油,2006,20(4):1-3
[6]邓宏文,王红亮,阎伟鹏.河流相层序地层构成模式探讨.沉积学报,2004,22(2):373-379
[7]石砥石,王永诗,王大华.垦东凸起上第三系油气成藏特征及勘探技术.中国海上油气:地质,2001,15(1):51-55
[8]薛培华.河流点坝相储集层模式北京石油工业出版社,1992
[9]陈建渝.生物标志物地球化学的新进展.地质科技情报,1995,14(1):35-44
[10]林玉祥,唐洪三.垦东凸起石油地球化学特征与成藏系统划分.油气地质与采收率,2001,8(5):27-31
[11]陈永红,陈庆春,林玉祥.渤海湾盆地垦东凸起油源对比与成藏条件研究.地质地球化学,2003,31(1):16-22
[12]肖尚斌,高喜龙,姜在兴,等.渤海湾盆地新生代的走滑活动及其石油地质意义.大地构造与成矿学,2000,24(4):321-328
[13]池英柳,赵文智.渤海湾盆地新生代走滑构造与油气聚集.石油学报,2000,3(2):14-20
[14]张善文,王永诗,石砥石,等.网毯式油气成藏体系—以济阳坳陷新近系为例.石油勘探与开发,2003,30(1):1-10
[15]高月华,杨风丽,林玉祥.垦东高凸起成藏动力学系统研究.海洋石油,2003,23(4):12-17
[16]刘金连,杨风丽.垦东高凸起油气成藏机制研究.同济大学学报,2003,31(6):672-676
[17]李明诚.石油与天然气运移[M].北京:石油工业出版社,1994.110-113.
[18]付广.油气成藏系统划分方法及其应用[J].海相油气地质,1996,1(4):21-25.
[19]林玉祥.垦东凸起油气成藏模式[D].北京:石油大学地球科学学院,1999.28-33.
[20]林玉祥,俞家声.垦东地区石油成藏系统及其演化.地质与勘探,2001,37(5):29-33
[21]王大华,苏宪锋,魏艳萍.垦东凸起上第三系油气分布与断层关系研究.中国海上油气:地质,2003,17(4):232-235
[20]彭存仓,顾菊萍.垦东地区上第三系馆陶组上段成藏规律研究.江汉石油学院学,2002,24(4):10-12
[22]方旭庆,林会喜,王智帮.垦东凸起“陀螺式”演化与油气成藏.西安石油大学学报(自然科学版),2007,22(4):13-16
[2]赵重远.渤海湾盆地的构造格局及其演化[J].石油学报,1984,5(1):1-8
[3]侯贵廷,钱祥麟,蔡东升.渤海湾盆地中、新生代构造演化研究.北京大学学报:自然科学版,2001,37(6):845-851.
[4]付兆辉,李敏.郯庐断裂对垦东地区构造和成藏的影响.海洋石油,2005,25(2):15-19
[5]方旭庆.试论走滑运动对垦东地区油气聚集的影响.河南石油,2006,20(4):1-3
[6]邓宏文,王红亮,阎伟鹏.河流相层序地层构成模式探讨.沉积学报,2004,22(2):373-379
[7]石砥石,王永诗,王大华.垦东凸起上第三系油气成藏特征及勘探技术.中国海上油气:地质,2001,15(1):51-55
[8]薛培华.河流点坝相储集层模式北京石油工业出版社,1992
[9]陈建渝.生物标志物地球化学的新进展.地质科技情报,1995,14(1):35-44
[10]林玉祥,唐洪三.垦东凸起石油地球化学特征与成藏系统划分.油气地质与采收率,2001,8(5):27-31
[11]陈永红,陈庆春,林玉祥.渤海湾盆地垦东凸起油源对比与成藏条件研究.地质地球化学,2003,31(1):16-22
[12]肖尚斌,高喜龙,姜在兴,等.渤海湾盆地新生代的走滑活动及其石油地质意义.大地构造与成矿学,2000,24(4):321-328
[13]池英柳,赵文智.渤海湾盆地新生代走滑构造与油气聚集.石油学报,2000,3(2):14-20
[14]张善文,王永诗,石砥石,等.网毯式油气成藏体系—以济阳坳陷新近系为例.石油勘探与开发,2003,30(1):1-10
[15]高月华,杨风丽,林玉祥.垦东高凸起成藏动力学系统研究.海洋石油,2003,23(4):12-17
[16]刘金连,杨风丽.垦东高凸起油气成藏机制研究.同济大学学报,2003,31(6):672-676
[17]李明诚.石油与天然气运移[M].北京:石油工业出版社,1994.110-113.
[18]付广.油气成藏系统划分方法及其应用[J].海相油气地质,1996,1(4):21-25.
[19]林玉祥.垦东凸起油气成藏模式[D].北京:石油大学地球科学学院,1999.28-33.
[20]林玉祥,俞家声.垦东地区石油成藏系统及其演化.地质与勘探,2001,37(5):29-33
[21]王大华,苏宪锋,魏艳萍.垦东凸起上第三系油气分布与断层关系研究.中国海上油气:地质,2003,17(4):232-235
[20]彭存仓,顾菊萍.垦东地区上第三系馆陶组上段成藏规律研究.江汉石油学院学,2002,24(4):10-12
[22]方旭庆,林会喜,王智帮.垦东凸起“陀螺式”演化与油气成藏.西安石油大学学报(自然科学版),2007,22(4):13-16