饶阳凹陷主断层活动期与新近系油气成藏关系
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摘要
处于活动期的断层是油气纵向运移重要通道,油气运移受到断层活动时期及活动部位的控制。在油气成藏时期内活动的断层会成为油气纵向运移的有效通道。文中利用地震资料对饶阳凹陷新近系主干油源断层生长指数及断层落差进行计算,定量确定了油源断层在不同地质历史时期的活动强度及活动部位。对与烃类包裹体伴生的盐水包裹体进行测温,准确界定新近系油气藏的成藏时间。在油气成藏期持续活动的断层部位,就是油气由古近系向新近系纵向运移的主要通道,也是新近系油藏的有利聚集区。研究发现,饶阳凹陷新近系油藏的成藏期为明化镇末期,凹陷内主要油源断层的局部位置在新近纪活动性较强,饶阳凹陷已探明新近系油藏多分布在新近纪活动较为强烈的主干断层附近。
Fault at the activity period is a vital pathway for oil and gas vertical migration.Hydrocarbon migration is controlled by fault activity period and position.Faults which move during the oil-gas migration and accumulation will become the effective pathway for oil and gas vertical migration.Using the seismic data,this paper calculates the growth index and fault throw of the main faults of Neogene in Raoyang Sag,and infers the fault movement at different periods.The homogenization temperature of fluid inclusion can accurately determine the Neogene oil-gas accumulation period.The combination of the two above analyses can determine the faults which act as passages for oil and gas vertical migration and the prior region for hydrocarbon accumulation. Researches find that the oil-gas accumulation timing of Neogene reservoir in Raoyang Sag is in late Minghuazhen.the local position of the main oil source faults moves strongly in Neogene and the proven Neocene reservoir distribution shows that Neocene reservoirs are more likely to be found near the intense active faults.
Fault at the activity period is a vital pathway for oil and gas vertical migration.Hydrocarbon migration is controlled by fault activity period and position.Faults which move during the oil-gas migration and accumulation will become the effective pathway for oil and gas vertical migration.Using the seismic data,this paper calculates the growth index and fault throw of the main faults of Neogene in Raoyang Sag,and infers the fault movement at different periods.The homogenization temperature of fluid inclusion can accurately determine the Neogene oil-gas accumulation period.The combination of the two above analyses can determine the faults which act as passages for oil and gas vertical migration and the prior region for hydrocarbon accumulation. Researches find that the oil-gas accumulation timing of Neogene reservoir in Raoyang Sag is in late Minghuazhen.the local position of the main oil source faults moves strongly in Neogene and the proven Neocene reservoir distribution shows that Neocene reservoirs are more likely to be found near the intense active faults.
引文
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[2]杨明慧,刘池阳,杨斌谊.冀中坳陷东部西倾断裂的构造负反转过??程[J].石油勘探与开发,2002,29(6):35-37. Yang Minghui,Liu Chiyang,Yang Binyi.Negative structure inversion of the west-dipping faults in the eastern Jizhong Depression[J]. Petroleum Exploration and Development,2002,29(6):35-37.
[3]易士威.断陷盆地岩性地层油藏分布特征[J].石油学报,2005,26 (1):38-41 Yi Shiwei.Distribution features of lithologic and stratigraphic reservoirs in fault-depression basin[J].Acta Petrolei Sinica,2005,26 (1):38-41.
[4]易士威,王权.冀中坳陷富油凹陷勘探现状及勘探思路[J].石油勘探与开发,2004,31(3):257-272. Yi Shiwei,Wang Quan.New concept of exploration strategy for the oilrich Jizhong Depression[J].Petroleum Exploration and Development, 2004,31(3):257-272.
[5]孙冬胜,刘池阳,杨明慧.冀中坳陷马西断裂带分段特征及其与油气的关系[J].石油与天然气地质,2003,24(3):239-243. Sun Dongsheng,Liu Chiyang,YangMinghui.Segrnentary characteristics of Maxi Fault and their relationships with oil and gas in Jizhong Depression[J].Oil & Gas Geology,2003,24(3):239-243.
[6]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. Zhao Zhongyuan.Structural pattern and evolution of Bohaiwan Basin, China[J].Acta Petrolei Sinica,1984,5(1 ):1-8.
[7]Morley C K.Patterns of displacement analog large normal faults: implications for basin evolution and fault propagation,based on examples from East Africa[J].AAPG Bulletin,1999,83(4):613-634.
[8]潘长春,周仲毅,解启来.油气和含油气包裹体及其在油气地质和地球化学研究中的意义[J].沉积学报,1996,14(4):15-23. Pan Changchun,Zhou Zhongyi,Xie Qilai.Hydrocarbon inclusions: implications to petroleum geology and geochemistry[J].Acta Sedimentologica Sinica,1996,14(4):15-23.
[9]陶士振.包裹体应用于油气地质研究的前提条件和关键问题[J].地质科学,2004,39(1):77-91. Tao Shizhen.Premise conditions and key problems of applied study of inclusion in oil-gas geology[J].Chinese Journal of Geology,2004,39 (1):77-91.
[10]邵济安,牟宝磊,张履桥.华北东部中生代构造格局转换过程中的深部作用与浅部响应[J].地质论评,2000,46(1):32-40. Shao Ji' an,Mu Baolei,Zhang Lvqiao.Deep geological process and its shallow response during mesozoic transfer of tectonic frameworks in eastern North China[J].Geological Review,2000,46(1 ):32-40.
[11]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[J].中国海上油气,2003,17(4):232-235. Wang Dahua,Su Xianfeng,Wei Yanping.The relationship between Neogene hydrocarbon distribution and faults in Kendong Uplift[J]. China Offshore Oil and Gas,2003,17(4):232-235.
[12]杜金虎,易士威,卢学军,等.试论富油气凹陷油气分布的“互补性”特征[J].中国石油勘探,2004,9(1):17-22. Du Jinhu,Yi Shiwei,Lu Xuejun,et al.Oil and gas distribution of oilenriched depression characterized with“reciprocity”[J].China Petroleum Exploration,2004,9(1 ):17-22.
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