天然气地质学

陕北地区长81浅水缓坡砂体类型特征及成因模式

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刘显阳(1969-),男,甘肃庆阳人,高级工程师,在读博士,主要从事沉积学及油气地质研究. E-mail:lxy3_cq@petrochina.com.cn.

收稿日期: 2012-10-16

  修回日期: 2012-12-17

  网络出版日期: 2013-02-10

基金资助

国家科技重大专项(编号:2011ZX05044;2011ZX05001);中国科学院西部之光项目;中国科学院油气资源研究重点实验室开放基金项目(编号:KFJJ2010-01)联合资助.

Characteristics and Genetic Model of Sand Body Type in Shallow Gentle Slope from Chang 81 in Shanbei Area

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  • 1.College of Energy Resources,Chengdu University of Technology,Chengdu 610059,China;
    2.Exploration Department,PetroChina Changqing Oilfield Company,Xi′an 710018,China;
    3.Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academyof Sciences,Lanzhou 730000,China;4.Research Institute of Exploration and Development,PetroChina ChangqingOilfield Company,Xi′an 710018,China;5.National Engineering Laboratory for Exploration and Development of Low-permeability Oil and Gas Fields,Xi′an 710018, China.

Received date: 2012-10-16

  Revised date: 2012-12-17

  Online published: 2013-02-10

摘要

鄂尔多斯盆地在长81期处于浅水湖泊沉积环境,盆地东北部的陕北地区在该期湖盆底部形态相对更加平缓、水体更浅。利用测井、岩心、薄片等资料,从储层类型、时空展布、岩石学特征、物性等方面研究了长81储层特征,认为研究区长81期主要发育水下分流河道砂体和河口坝砂体,砂体单层厚度薄、泥质含量高,具有明显的多旋回性、砂体垂向和纵向上连续性差,但分布范围广;砂体为岩屑长石砂岩和长石岩屑砂岩,属于细砂岩和极细砂岩;物性整体上差,属于典型的低孔特低渗—超低渗储层。分析表明造成该类型砂体形成的主要原因是:①研究区距离物源区远,且供给量不充足;②水体浅、湖盆底部形态平缓,湖岸线波及范围广;③湖水动力和河水动力弱。因此,在上述沉积环境下,在小期次湖平面升降过程中,长81砂体形成了“拉锯”式的砂体沉积模式。[HJ]

本文引用格式

刘显阳,李树同,王琪,邱军利,郭正权,楚美娟 . 陕北地区长81浅水缓坡砂体类型特征及成因模式[J]. 天然气地球科学, 2013 , 24(1) : 47 -53 . DOI: 10.11764/j.issn.1672-1926.2013.01.47

Abstract

Interval Chang 81 was regarded as shallow lake sedimentary environment in Ordos basin,and the basin had a more gentle bottom morphology and more shallow water body in Shanbei area.The Chang81reservoir is investigated by means of well-logging,core properties,thin sections for reservoir types,temporal-spacial distribution,lithology and reservoir physical property.It′s showed that the area main developed underwater distributary channel sandstone and mouth bar sandstone with thin monolayer,high shale content,significant multiply cyclicity,poor continuity in vertical and longitudinal direction and wide distribution.The sandstones is lithic feldspar and feldspar lithic sandstone,which are regarded as packsand and hone.The reservoir is regarded as low porosity and low-extra-low permeability reservoir as to the poor physical property.Analysis shows that there are 3 reasons why this kind of sand body formed.First,the study area was far away from the provenance,which led to the insufficient supplication.Second,water was shallow,the bottom morphology is gentle and the lake shoreline spread widely.In addition,the water power of lake and river was weak.Therefore,in small times of lake level lifting process,see-saw type sedimentation model was formed in the Chang 81 sandstone.

参考文献

[1]Guo Yanru,Liu Junbang,Yang Hua,et al.Hydrocarbon accumulation mechanism of low permeable tight lithologic oil reservoirs in the Yanchang Formation,Ordos basin,China[J].Petroleum Exploration and Development,2012,39(4):417-425.[郭彦如,刘俊榜,杨华,等.鄂尔多斯盆地延长组低渗透致密岩性油藏成藏机理[J].石油勘探与开发,2012,39(4):417-425.]

[2]Yang Hua,Liu Xianyang,Zhang Caili,et al.The main controlling factors and distribution of low permeability lithologic reservoirs of Triassic Yanchang Formation in Ordos basin[J].Lithologic Reservoirs,2007,19(3):1-6.[杨华,刘显阳,张才利,等.鄂尔多斯盆地三叠系延长组低渗透致密岩性油藏主控因素及其分布规律[J].岩性油气藏,2007,19(3):1-6.]

[3]Chu Meijuan,Guo Zhengquan,Bai Chang′e.Sedimentation and evolution features in Chang 8 reservoir of Yanchang Formation in Ordos basin[J].Journal of Oil and Gas Technology,2012,34(2):13-18.[楚美娟,郭正权,白嫦娥.鄂尔多斯盆地延长组长8油层组沉积及其演化特征[J].石油天然气学报,2012,34(2):13-18.]

[4]Zheng Ximin,Song Guangshou,Wang Duoyun,et al.Sedimentary a-natomy of thick anisotropic sandstones for Chang 8 oil-bearing intervalin Longdong area,Shaan-Gan-Ning basin[J].Acta Sedimentologica Sinica,2003,21(2):273-276.[郑希民,宋广寿,王多云,等.陕甘宁盆地陇东地区长8油组厚层非均质砂体的沉积学解剖[J].沉积学报,2003,21(2):273-276.]

[5]Zhang Qichao,Wang Duoyun,Li Jianting,et al.Genesis of delta front sand and characteristics of Chang8 stratigraphical oil pools in Maling-Zhenbei area[J].Natural Gas Geoscience,2011,22(5):807-814.[张其超,王多云,李建霆,等.马岭—镇北地区长8段三角洲前缘砂体成因与岩性油气藏特征[J].天然气地球科学,2011,22(5):807-814.]

[6]Wang Zhikun,Wang Duoyun,Zheng Ximin,et al.Depositional characteristics and physical behavior analysis of the Chang 6-8 reservoir of Triassic Yanchang Formation in Longdong area,Shan-Gan-Ning basin[J].Natural Gas Geoscience,2003,14(5):380-385.[王志坤,王多云,郑希民,等.陕甘宁盆地陇东地区三叠系延长统长6-长8储层沉积特征及物性分析[J].天然气地球科学,2003,14(5):380-385.]

[7]Wu Fuli,Li Wenhou,Li Yuhong,et al.Delta sediments and evolution of the Yanchang Formation of upper Triassic in Ordos basin[J].Journal of Palaeography,2004,6(3):307-315.[武福礼,李文厚,李玉宏,等.鄂尔多斯盆地上三叠统延长组三角洲沉积与演化[J].古地理学报,2004,6(3):307-315.]

[8]Yang Youyun.Characteristics of  the depositional systems and sequence evolution of the Yanchang Formation in the southern Ordos basin[J].Geological Bulletin of China,2005,24(4):369-272.[杨友运.鄂尔多斯盆地南部延长组沉积体系与层序特征[J].地质通报,2005,24(4):369-272.]

[9]Yang Youyun,Zhang Pengbo,Zhang Zhongyi.Sedimentary features and sequence evolution of braided river delta of Chang 8 oil-bearing interval of Xifeng oilfield in Ordos basin[J].Geological Science and Technology Information,2005,24(1):45-48.[杨友运,张蓬勃,张忠义.鄂尔多斯盆地西峰油田长8油组辫状河三角洲沉积特征与层序演化[J].地质科技情报,2005,24(1):45-48.]

[10]Liu Huaqing Li Xiangbo WanYanrong,et al.Palaeogeographic and sedimentological characteristics of the Triassic Chang 8,Ordos basin,China[J].Acta Sedimentologica Sinica,2011,29(6):1086-1095.[刘化清,李相博,完颜容,等.鄂尔多斯盆地长8油层组古地理环境与沉积特征[J].沉积学报,2011,29(6):1086-1095.]

[11]Luo Shunshe,Yin Xiao.Study on the sedimentary facies of Chang 8 of the Yanchang Formation in the Jiyuan area,Ordos basin[J].Journal of Oil and GasTechnology,2008,30(4):4-9.[罗顺社,银晓.鄂尔多斯盆地姬塬地区延长组长8沉积相的研究[J].石油天然气学报,2008,30(4):4-9.]

[12]Li Yuanhao,Liu Chiyang,Du Yuguo,et al.Sedimentary characteristics of shallow water delta and lake shoreline control on sandbodies of Chang 8 oil-bearing interval of the upper Triassic Yanchang Formation in northwestern Ordos basin[J].Journal of Palaeogeography,2009,11(3):265-274.[李元昊,刘池洋,独育国,等.鄂尔多斯盆地西北部上三叠统延长组长8油层组浅水三角洲沉积特征及湖岸线控砂[J].古地理学报,2009,11(3):265-274.]

[13]Han Yonglin,Wang Chengyu,Wang Haihong,et al.Sedimentary characteristics of shallow-water deltas in Chang-8 subsection of Yanchang Formation,Jiyuan area[J].Acta Sedimentologica Sinica,2009,27(6):1057-1064.[韩永林,王成玉,王海红,等.姬塬地区长8油层组浅水三角洲沉积特征[J].沉积学报,2009,27(6):1057-1064.]

[14]Zou Caineng,Zhao Wenzhi,Zhang Xingyang,et al.Formation and distribution of shallow-water deltas and central-basin sandbodies in largeopen depression lake basin[J].Acta Geologica Sinica,2008,82(6):813-825.[邹才能,赵文智,张兴阳,等.大型敞流坳陷湖盆浅水三角洲与湖盆中心砂体的形成与分布[J].地质学报,2008,82(6):813-825.]

[15]Li Fengjie,Wang Duoyun,Chen Mingying.Isochronic correlation of sandbodieswith Chang 8 oil formation by high resolution sequence analysis in Yanchang Formation,Xifeng oil field,Ordos  basin,China[J].Journal of Chengdu University of Technology:Science & Technology Edition,2007,34(2):121-127.[李凤杰,王多云,陈明应.西峰油田延长组长8油组砂体高分辨率层序等时对比分析[J].成都理工大学学报:自然科学版,2007,34(2):121-127.]

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