为建立塔里木盆地顺北地区中—下奥陶统鹰山组在开阔—局限台地沉积体系下的层序地层格架,探讨层序地层对有利储层的控制作用并建立储层地质模型,基于露头、岩心、测井及地震资料识别三级层序界面,利用INPEFA测井旋回技术与Dmey小波变换对Th/U曲线进行处理,结合Fischer图解法划分四级层序,达到在高精度层序格架内梳理储层类型及特征、分析其控储效应及多种因素配置下储层发育模式的目的。研究表明:研究区共识别出2个三级层序(SQ1、SQ2)、4个四级层序(YSQ1—YSQ4)。结合断裂特征及沉积背景认为,研究区鹰山组SQ1层序较SQ2层序云灰岩薄互层频次增加,白云岩含量增多,更易引发岩层破裂形成储集体。在四级层序内自下而上可划分为4种储层类型:与主断裂相关的白云岩/灰岩裂缝型储层、埋藏/热液作用下形成白云岩型储层、次级断裂控制的灰岩裂缝型储层以及与准同生作用密切相关的白云岩/灰岩溶蚀孔洞储层。该研究成果不仅为高频层序地层控储效应提供理论基础,同时为研究区有利储层预测明确了方向。
To establish a sequence stratigraphic framework for the middle-lower Ordovician Yingshan Formation on an open-to-restricted carbonate platform in the Shunbei Area of the Tarim Basin,and to investigate how sequence stratigraphy controls favorable reservoirs and to build reservoir models,outcrop,core,well-logging and seismic data were used, third-order sequence boundaries were identified.Upon this,INPEFA(Integrated Prediction Error Filter Analysis)well logging cycle and Dmey wavelet transform were applied to Th/U ratio log curves.Combined with Fischer diagram methods,fourth-order sequences were produced,which enabled classification of reservoir types and characteristics,analysis of their reservoir-control effects,and determination of reservoir development patterns under multiple factors.In the study area,two third-order sequences(SQ1-SQ2)and four fourth-order sequences(YSQ1-YSQ4)were identified.Based on fracture characteristics and depositional context, sequence SQ1 contained more thin interbedded tuffaceous limestone layers and higher dolomite content than SQ2,making it more prone to bed fracturing and reservoir development.Within the fourth-order sequences(YSQ1-YSQ4),four bottom-top reservoir types were identified:fracture reservoirs associated with the main fault,dolomite reservoirs formed by burial or hydrothermal processes,limestone fracture reservoirs controlled by secondary faults,and karst(dissolution-cavity)reservoirs closely linked to penecontemporaneous processes.This study provides a theoretical basis for high-frequency sequence stratigraphy controls reservoirs and clarifies directions for predicting favorable reservoirs.
[1] 赵锐,赵腾,李慧莉,等.塔里木盆地顺托果勒地区中下奥陶统鹰山组与一间房组沉积相与旋回地层[J].东北石油大学学报,2019,43(4):1-16,139.
ZHAO Rui,ZHAO Teng,LI Huili,et al.Sedimentary facies and cyclic stratigraphy of Yingshan and Yijianfang Formations of lower-middle Ordovician in Shuntuoguole Area,Tarim Basin[J].Journal of Northeast Petroleum University,2019,43(4):1-16,139.
[2] 王文博,傅恒,闾廖然,等.塔里木盆地顺北地区奥陶系碳酸盐岩层序模式及其意义[J].沉积学报,2021,39(6):1451-1465.
WANG Wenbo,FU Heng,LYU Liaoran,et al.Sequence model of Ordovician carbonate strata in Shunbei Area,Tarim Basin, and its significance[J].Acta Sedimentologica Sinica,2021,39(6):1451-1465.
[3] 刘楠.塔里木盆地顺北地区中下奥陶统层序地层与沉积相研究[D].北京:中国地质大学(北京),2021.
LIU Nan.Sequence stratigraphy and sedimentary facies of middle-lower Ordovician in Shunbei Area,Tarim Basin[D].Beijing:China University of Geosciences(Beijing),2021.
[4] 赵永强.塔里木盆地顺北—顺南地区鹰山组四级层序地层划分及地质意义[J].成都理工大学学报(自然科学版),2022,49(4):454-467.
ZHAO Yongqiang.The fourth-order sequence stratigraphic division and geological significance of Ordovician Yingshan Formation in Shunbei-Shunnan Area,Tarim Basin,China[J].Journal of Chengdu University of Technology(Science & Technology Edition),2022,49(4):454-467.
[5] 李映涛,汝智星,邓尚,等.塔里木盆地顺北特深碳酸盐岩储层天然裂缝实验评价及油气意义[J].石油实验地质,2023,45(3):422-433.
LI Yingtao,RU Zhixing,DENG Shang,et al.Experimental evaluation and hydrocarbon significance of natural fractures in Shunbei ultra-deep carbonate reservoir,Tarim Basin[J].Petroleum Ecology & Experiment,2023,45(3):422-433.
[6] 汤良杰,贾承造,金之钧,等.中国西北叠合盆地的主要构造特征[J].地学前缘,2003,10(增刊1):118-124.
TANG Liangjie,JIA Chengzao,JIN Zhijun,et al.The main tectonic characteristics of superimposed basins,northwest China[J].Earth Science Frontiers,2003,10(S1):118-124.
[7] 刘忠宝,于炳松,高志前,等.塔中地区西部倾没端奥陶系高频层序地层格架中岩溶发育特征[J].石油天然气学报(江汉石油学院学报),2005,27(4):36-39.
LIU Zhongbao,YU Bingsong,GAO Zhiqian,et al.The Karst development feature in sequence stratigraphic framework of the western pitching end of Tazhong Area[J].Journal of Oil and Gas Technology(Jianghan Petroleum Institute),2005,27(4):36-39.
[8] 于炳松,樊太亮,黄文辉,等.层序地层格架中岩溶储层发育的预测模型[J].石油学报,2007,28(4):41-45.
YU Bingsong,FAN Tailiang,HUANG Wenhui,et al.Predictive model for karst reservoirs in sequence stratigraphic framework[J].Acta Petrolei Sinica,2007,28(4):41-45.
[9] 肖莹莹.塔里木盆地寒武—奥陶系台地结构特征及其对烃源岩的制约[D].北京:中国地质大学(北京),2012.
XIAO Yingying.Cambrian-Ordovician carbonate platform and its restriction on source rocks in Tarim Basin[D].Beijing:China University of Geosciences (Beijing),2012.
[10] 高达,林畅松,胡明毅,等.利用自然伽马能谱测井识别碳酸盐岩高频层序——以塔里木盆地塔中地区T1井良里塔格组为例[J].沉积学报,2016,34(4):707-715.
GAO Da,LIN Changsong,HU Mingyi,et al.Using spectral gamma ray log to recognize high-frequency sequences in carbonate strata:a case study from the Lianglitage Formation from Well T1 in Tazhong Area,Tarim Basin[J].Acta Sedimentologica Sinica,2016,34(4):707-715.
[11] 梁金同,周刚,曾云贤,等.基于自然伽马能谱测井资料的碳酸盐岩层序地层划分及其对古环境恢复的指示意义——以川东北LT1井下寒武统龙王庙组为例[J].地质论评,2023,69(2):448-460.
LIANG Jintong,ZHOU Gang,ZENG Yunxian,et al.Sequence stratigraphy interpretation and implications for paleoenvironmentreconstruction based on gamma-ray spectrum logging data of carbonates:a case study from the Lower Cambrian Longwangmiao Formationof the Well LT1 in northeast Sichuan Basin[J].Geological Review,2023,69(2):448-460.
[12] 杨孝群.塔里木盆地塔北地区奥陶系碳酸盐岩高精度层序格架及内幕岩溶储层发育机制[D].北京:中国地质大学(北京),2017.
YANG Xiaoqun.The high frequency sequence framework and interstratumkarst reservoirs development mechanism of Lower-Middle Ordovician in Tabei Area,Tarim Basin[D].Beijing:China University of Geosciences (Beijing),2017.
[13] 朱秀香,赵锐,赵腾.塔里木盆地顺北1号断裂带走滑分段特征与控储控藏作用[J].岩性油气藏,2023,35(5):131-138.
ZHU Xiuxiang,ZHAO Rui,ZHAO Teng.Characteristics and control effect on reservoir and accumulation of strike-slip segments in Shunbei No.1 fault zone,Tarim Basin[J].Lithologic Reservoirs,2023,35(5):131-138.
[14] 季天愚.塔里木盆地中—下寒武统台缘带分布、沉积相及有利区的地震解释研究[D].西安:西北大学,2021.
JI Tianyu.Seismic interpretation of the platform margindistribution,sedimentary facies and favorableareas of middle-lower Cambrian in TarimBasin[D].Xi′an:Northwest University,2021.
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