莱北低凸起物源供给能力及沉积特征分析
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摘要
以莱州湾凹陷KL10-1油田为例,通过恢复残余古地貌对莱北低凸起进行准平原化分析,按照剥蚀程度高低将准平原化地貌依次划分为平顶山、圆顶山和尖顶山;通过精确的点分析与定性的平面相分析,恢复沙三上亚段沉积时期莱北低凸起的剥蚀情况,同时进行古沟谷分析,结果表明:研究区存在三类物源通道体系,莱北低凸起在沙三上亚段沉积时期物源供给能力较低,为KL10-1区域提供碎屑沉积物较少;沙三上亚段沉积微相主要发育水下分流河道和席状砂,河口坝不发育,砂体厚度薄,平面分布局限,整体表现为窄河道沉积特征。
By taking the KL10-1 oilfield in Laizhou bay sag as an example, through the restoration of residual paleogeomorphology, the low uplift in the north of Laizhou was analyzed by Peneplanization, which was divided into Table Mountain, Cupola Mountain and Pointed mountain according to the degree of denudation. Based on precise point analysis and qualitative plane facies analysis, the erosion of Laibei low uplift in the upper third sub-member of Shahejie formation is recovered, and the ancient gully is analyzed at the same time. The results showed that there were three types of provenance channel systems in the study area, and the provenance supply capacity of the Laibei low uplift was low in the upper third sub-member of the Shahejie formation, which would provide less clastic sediments for the KL10-1 area. The sedimentary microfacies in the upper third submember of Shahejie formation mainly developed underwater distributary channel and sheet sand, while the estuary and dam were not developed. The sand body was thin with limited plane distribution and the overall performance was of narrow channel sedimentary characteristic.
By taking the KL10-1 oilfield in Laizhou bay sag as an example, through the restoration of residual paleogeomorphology, the low uplift in the north of Laizhou was analyzed by Peneplanization, which was divided into Table Mountain, Cupola Mountain and Pointed mountain according to the degree of denudation. Based on precise point analysis and qualitative plane facies analysis, the erosion of Laibei low uplift in the upper third sub-member of Shahejie formation is recovered, and the ancient gully is analyzed at the same time. The results showed that there were three types of provenance channel systems in the study area, and the provenance supply capacity of the Laibei low uplift was low in the upper third sub-member of the Shahejie formation, which would provide less clastic sediments for the KL10-1 area. The sedimentary microfacies in the upper third submember of Shahejie formation mainly developed underwater distributary channel and sheet sand, while the estuary and dam were not developed. The sand body was thin with limited plane distribution and the overall performance was of narrow channel sedimentary characteristic.
引文
[1]薛永安,刘廷海,王应斌,等.渤海海域天然气成藏主控因素与成藏模式[J].石油勘探与开发,2007,34(5):521-528.
[2]曾选萍,代黎明,郑江峰.地质-地震一体化中深层储层预测——以KL10-1构造为例[J].石油地质与工程,2010,24(5):37-42.
[3]POSAMENTIER H W,KOLLA V.Seismic geomorphology and stratigraphy of depositional elements in deep-water settings[J].Journal of Sedimentary Research,2003,73(3):367-388.
[4]ZENG Hongliu,LOUCKS R,JANSON X,et al.Threedimensional seismic geomorphology and analysis of the ordov ician paleokarst drainage system in the central tabei uplift,northern tarim basin,western china[J].AAPG Bulletin,2011,95(12):2 061-2 083.
[5]BALEN R T,BEEK P A,CLOETINGH S A P L.The effect of rift shoulder erosion on strata patterns at passive margins:implications for sequence stratigraphy[J].Earth and Planetary Science Letters,1995,134:527-544.
[6]程日辉,林畅松,崔宝琛.沉积形式与构造控制研究进展[J].地质科技情报,2000,19(1):11-15.
[7]刘景彦,林畅松,喻岳钰,等.用声波测井资料计算剥蚀量的方法改进[J].石油实验地质,2000,22(4):302-306.
[8]付晓飞,李兆影,卢双舫,等.利用声波时差资料恢复剥蚀量方法研究与应用[J].大庆石油地质与开发,2004,23(1):9-11.
[9]昝立生.声波时差曲线对确定生油岩高压带和地层剥蚀厚度的应用[J].中国海上油气(地质),1989,3(4):37-41.
[2]曾选萍,代黎明,郑江峰.地质-地震一体化中深层储层预测——以KL10-1构造为例[J].石油地质与工程,2010,24(5):37-42.
[3]POSAMENTIER H W,KOLLA V.Seismic geomorphology and stratigraphy of depositional elements in deep-water settings[J].Journal of Sedimentary Research,2003,73(3):367-388.
[4]ZENG Hongliu,LOUCKS R,JANSON X,et al.Threedimensional seismic geomorphology and analysis of the ordov ician paleokarst drainage system in the central tabei uplift,northern tarim basin,western china[J].AAPG Bulletin,2011,95(12):2 061-2 083.
[5]BALEN R T,BEEK P A,CLOETINGH S A P L.The effect of rift shoulder erosion on strata patterns at passive margins:implications for sequence stratigraphy[J].Earth and Planetary Science Letters,1995,134:527-544.
[6]程日辉,林畅松,崔宝琛.沉积形式与构造控制研究进展[J].地质科技情报,2000,19(1):11-15.
[7]刘景彦,林畅松,喻岳钰,等.用声波测井资料计算剥蚀量的方法改进[J].石油实验地质,2000,22(4):302-306.
[8]付晓飞,李兆影,卢双舫,等.利用声波时差资料恢复剥蚀量方法研究与应用[J].大庆石油地质与开发,2004,23(1):9-11.
[9]昝立生.声波时差曲线对确定生油岩高压带和地层剥蚀厚度的应用[J].中国海上油气(地质),1989,3(4):37-41.