辽河坳陷西部凹陷曙北地区古近系层序地层格架
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摘要
曙北地区位于辽河坳陷西部凹陷西斜坡北段。根据对地震、测井资料的综合研究,应用时频分析技术,在该地区古近纪同裂谷沉降超层序中识别出4个由扇三角洲—湖泊体系组成的层序,包括11个体系域。该地区Ⅰ型和Ⅱ型层序的水进体系域和高位体系域之间常发育大段暗色泥岩和油页岩,可视为凝缩层,是主要的油源层和盖层;各体系域的边缘相均可发育良好的储集层。高升油层为层序Ⅰ水进体系域沉积,杜家台油层为层序Ⅰ高位体系域沉积,莲花油层为层序Ⅱ水进体系域沉积。高升油层是曙北地区最好的油层,说明最大规模水进期发育的砂岩是最有利的储集层。图4参13
Shubei Area is located in the northern section of western sag of Liaohe Depression. Four sequences consisting of fan delta lacustrine sedimentary system are identified in the synrift setting supersequence based on the comprehensive research of seismic, logging curve and application of time-frequency analysis technology, including 11 systems tracts. A set of thickness dark shale and oil shale is frequently developed between TST and HST, which are considered condensed section and the principle oil source rock and capping rock; the marginal areas of all systems would be advantage reservoirs. Gaosheng reservoir is a set of the transaggressive systems tract sediment of sequenceⅠ, Dujiatai reservoir is a set of the high-stand systems tract sediment of SequenceⅠ, Lianhua reservoir, a set of the transgressive systems tract sediment of SequenceⅡ. Gaosheng reservoir should be the best reservoir in the Shubei Area. It is clearly that the aggressive systems tract sand developed in the largest transaggressive period is the best reservoir
Shubei Area is located in the northern section of western sag of Liaohe Depression. Four sequences consisting of fan delta lacustrine sedimentary system are identified in the synrift setting supersequence based on the comprehensive research of seismic, logging curve and application of time-frequency analysis technology, including 11 systems tracts. A set of thickness dark shale and oil shale is frequently developed between TST and HST, which are considered condensed section and the principle oil source rock and capping rock; the marginal areas of all systems would be advantage reservoirs. Gaosheng reservoir is a set of the transaggressive systems tract sediment of sequenceⅠ, Dujiatai reservoir is a set of the high-stand systems tract sediment of SequenceⅠ, Lianhua reservoir, a set of the transgressive systems tract sediment of SequenceⅡ. Gaosheng reservoir should be the best reservoir in the Shubei Area. It is clearly that the aggressive systems tract sand developed in the largest transaggressive period is the best reservoir
引文
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[3] 吴振林.辽河新生界火山岩发育特征及其与油气关系[J].石油勘探与开发,1980,7(4):57 61.
[4] 陈振岩,李军生,张戈.辽河坳陷火山岩与油气关系[J].石油勘探与开发,1996,23(3):1 5.
[5] 郑志刚.琼东南盆地层序地层及沉积体系分析[A].层序地层及其在油气勘探开发中的应用论文集[C].北京:石油工业出版社,1997.
[6] 薛良清.层序地层学在湖相盆地中的应用探讨[J].石油勘探与开发,1990,17(6):29 34,40.
[7] 顾家裕.陆相盆地层序地层学格架概念及模式[J].石油勘探与开发,1995,22(4):6 10.
[8] 张世奇,纪友亮.陆相断陷湖盆层序地层学模式探讨[J].石油勘探与开发,1996,23(5):20 23.
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[10] 吴因业.陆相盆地层序地层学分析的方法与实践[J].石油勘探与开发,1997,24(5):7 10.
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