东濮凹陷盐湖准层序发育特征研究
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摘要
层序地层学理论是在研究海相地层的基础上发展起来的,它注重的是地层的沉积成因和周期性的旋回变化。准层序是层序的基本组成单元,代表一个水体向上变浅的沉积过程,在开展层序地层学研究工作时加强对准层序的分析非常重要。通过应用岩心、测井等资料开展高分辨层序地层学研究发现,陆相地层中准层序的发育特征与海相明显不同,表现为以向上变细的正韵律为主。通过深入分析影响陆相地层层序发育的主要控制因素,指出构造是决定湖盆有无的先决条件,气候和沉积物供给是层序发育的决定性因素。研究成果进一步丰富了陆相层序地层学理论,使得层序边界的划分和识别更趋合理和可操作性,使等时性地层对比和岩性对比趋于统一,从而也可以更好地开展沉积相和沉积微相描述。通过实际应用,进一步明确了东濮凹陷深水成盐观点,指出砂岩与盐岩属于夹在稳定泥页岩中的同时异相的沉积体,这种认识为东濮凹陷深层低渗透储层地震预测提供了新的思路。
:The sequence theory developed from the study of the marine formation focusses on the depositional genesis and periodic changes of formation.As the basic unit of one sequence,the parasequence is a sedimentary process when water shoaling.After the study of high-resolution sequence stratigraphy on the core,and loging data,the author finds that the parasequence charactehstics are dififerent in continental forimation from that in marine formation. The parasequence is a thinning and fining upward cadence.After the analysis of the controlling facts of continental sequence,the paper indicates that tectonics is the main reason to form a lake basin and the climate and the sedimentary supply are the decisive factors to sequence.This makes the partition and identiflcation of sequence boundaries more reasonable and more maneuverable,and unifies the sgnchronostratigraphic and lithostratigraphic correlation.This paper enriches the sequence theory,and this method is useful to describe sedimentary facies and microfacies.The author confirms that the salt rock was formed in deep water in Dongpu depression,and indicates that sandstone and salt stone have sediment as the same time and all nipped between the steady mudstone and (or)shale stone.Base on this analysis,a new measure of the seismic reservoir prediction has been found to low permeable strata in Dongpu depression.
:The sequence theory developed from the study of the marine formation focusses on the depositional genesis and periodic changes of formation.As the basic unit of one sequence,the parasequence is a sedimentary process when water shoaling.After the study of high-resolution sequence stratigraphy on the core,and loging data,the author finds that the parasequence charactehstics are dififerent in continental forimation from that in marine formation. The parasequence is a thinning and fining upward cadence.After the analysis of the controlling facts of continental sequence,the paper indicates that tectonics is the main reason to form a lake basin and the climate and the sedimentary supply are the decisive factors to sequence.This makes the partition and identiflcation of sequence boundaries more reasonable and more maneuverable,and unifies the sgnchronostratigraphic and lithostratigraphic correlation.This paper enriches the sequence theory,and this method is useful to describe sedimentary facies and microfacies.The author confirms that the salt rock was formed in deep water in Dongpu depression,and indicates that sandstone and salt stone have sediment as the same time and all nipped between the steady mudstone and (or)shale stone.Base on this analysis,a new measure of the seismic reservoir prediction has been found to low permeable strata in Dongpu depression.
引文
[1] 姜在兴,李华启.层序地层学原理及应用[M].北京:石油工业出版社,1996.
[2] 纪友亮,张世奇,等.陆相断陷湖盆层序地层学[M].北京:石油工业出版社,1996.
[3] 吴因业,等.含油气盆地层序解释技术与应用[M].北京:石油工业出版社,2000.
[4] C.K.威尔格斯著,徐怀大译.层序地层学原理———海平面变化综合分析[M].北京:石油工业出版社,1993.
[5] 纪友亮,张世奇,等.层序地层学原理及层序成因机制模式[M].北京:地质出版社,1998.
[6] 姜在兴,操应长,等.砂体层序地层及沉积学研究[M].北京:地质出版社,2000.
[7] 姜在兴译.层序地层学译文专集[J].世界石油科学,1992,(48):1-15.
[8] J.C.VanWagoner著,凡夫译.前陆盆地层序地层学综述:术语、论文摘要及层序地层学词汇[J].国外油气勘探,1996,8(4):404-416.
[9] 陈发亮,朱晖,李绪涛,等.东濮凹陷下第三系沙河街组层序地层划分及盐岩成因探讨[J].沉积学报,2000,18(3):384-388.
[10]陈发亮,魏生祥,等.逆向储层预测法与东濮凹陷深层隐蔽油气藏勘探[J].石油物探,2002,41(10):204-207.
[11]冯增昭.沉积岩石学(上下册)[M].北京:石油工业出版社,1993.
[12]金莉,等.强制海退概念与层序地层学体系域的讨论[J].中国海上油气(地质),1997,11(3):229-232.
[13]操应长.断陷湖盆层序地层下降体系域的划分[J].石油大学学报(自然科学版),2000,24(1):22-25.
[14]杨剑萍,姜在兴,陈发亮,等.惠民凹陷下第三系湖相沉积密集段特征[J].石油大学学报(自然科学版),1998,22(4):21-24.
[2] 纪友亮,张世奇,等.陆相断陷湖盆层序地层学[M].北京:石油工业出版社,1996.
[3] 吴因业,等.含油气盆地层序解释技术与应用[M].北京:石油工业出版社,2000.
[4] C.K.威尔格斯著,徐怀大译.层序地层学原理———海平面变化综合分析[M].北京:石油工业出版社,1993.
[5] 纪友亮,张世奇,等.层序地层学原理及层序成因机制模式[M].北京:地质出版社,1998.
[6] 姜在兴,操应长,等.砂体层序地层及沉积学研究[M].北京:地质出版社,2000.
[7] 姜在兴译.层序地层学译文专集[J].世界石油科学,1992,(48):1-15.
[8] J.C.VanWagoner著,凡夫译.前陆盆地层序地层学综述:术语、论文摘要及层序地层学词汇[J].国外油气勘探,1996,8(4):404-416.
[9] 陈发亮,朱晖,李绪涛,等.东濮凹陷下第三系沙河街组层序地层划分及盐岩成因探讨[J].沉积学报,2000,18(3):384-388.
[10]陈发亮,魏生祥,等.逆向储层预测法与东濮凹陷深层隐蔽油气藏勘探[J].石油物探,2002,41(10):204-207.
[11]冯增昭.沉积岩石学(上下册)[M].北京:石油工业出版社,1993.
[12]金莉,等.强制海退概念与层序地层学体系域的讨论[J].中国海上油气(地质),1997,11(3):229-232.
[13]操应长.断陷湖盆层序地层下降体系域的划分[J].石油大学学报(自然科学版),2000,24(1):22-25.
[14]杨剑萍,姜在兴,陈发亮,等.惠民凹陷下第三系湖相沉积密集段特征[J].石油大学学报(自然科学版),1998,22(4):21-24.
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