鄂尔多斯盆地富县地区长8层段致密砂岩储层特征及充注下限

邓亚仁; 任战利; 马文强; 陈西泮; 杨桂林; 南卡俄吾

doi:10.11781/sysydz201802288

鄂尔多斯盆地富县地区长8层段致密砂岩储层特征及充注下限

doi: 10.11781/sysydz201802288

1.
陕西省土地工程建设集团有限责任公司, 西安 710075
2. 西北大学大陆动力学国家重点实验室, 西安 710069
3. 西北大学地质学系, 西安 710069
4. 陕西延长石油(集团)有限责任公司, 陕西延安 716000

基金项目: 国家自然科学基金“鄂尔多斯、沁水沉积盆地中生代晚期古地温场对岩石圈动力学演化及油气赋存的约束作用”（41630312）资助。

详细信息

作者简介:
邓亚仁(1991-),男,硕士,助理工程师,从事非常规油气成藏及油气评价研究。E-mail:824259147@qq.com。

通讯作者:
任战利(1961-),男,研究员,博士生导师,从事盆地热演化史及油气成藏评价研究。E-mail:1410916336@qq.com。

中图分类号: TE122.2
计量
- 文章访问数: 1184
- HTML全文浏览量: 121
- PDF下载量: 261
- 被引次数: 0
出版历程
- 收稿日期: 2017-08-07
- 修回日期: 2018-01-19
- 刊出日期: 2018-03-28

Reservoir properties and hydrocarbon charging threshold of Chang 8 tight sandstones in Fuxian area, Ordos Basin

1.
Shaanxi Provincial Land Engineering Construction Group, Xi'an, Shaanxi 710075, China
2. State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, Shaanxi 710069, China
3. Department of Geology, Northwest University, Xi'an, Shaanxi 710069, China
4 Shaanxi Yanchang Petroleum(Group) Co. Ltd, Yan'an, Shaanxi 716000, China

摘要

摘要: 石油充注下限是致密油成藏研究的基础。鄂尔多斯盆地富县地区长8层段致密砂岩储层微观结构十分复杂，储层微观结构是影响石油充注的关键。利用场发射扫描电镜和CT方法定量研究致密砂岩储层孔隙-喉道特征；采用力学方法、录井分析法以及有效孔喉法综合分析致密储层充注物性下限与充注孔喉下限。研究结果表明，致密储层孔隙大小以纳米和亚微米级为主，孔隙平均半径为1.2 μm，喉道平均半径为0.1 μm，属于细孔-微细喉储层。经计算，长8致密砂岩储层孔隙度充注下限为4.5%，渗透率充注下限为0.04×10^-3 μm²，源储界面储层孔喉充注直径下限为15.77 nm，储层内部孔喉充注直径下限为24 nm。综合分析认为油气能充注纳米级孔，根据压实及胶结程度由弱至强，最终石油分别以油珠状、喉道状和薄膜式赋存。
- 微观结构 /
- 致密油储层 /
- 充注下限 /
- 赋存 /
- 长8层段 /
- 富县地区 /
- 鄂尔多斯盆地
Abstract: Hydrocarbon charging threshold is the basis for tight oil accumulation research. The microstructure of Chang 8 tight sandstone reservoirs in the Fuxian area of Ordos Basin is very complicated, which is a key factor influencing hydrocarbon charging. Field emission scanning electron microscopy (SEM) and CT methods were used to quantitatively study the pore-throat characteristics of tight sandstone reservoirs. Mechanical properties, well logging and effective pore-throat analyses were used to determine the hydrocarbon charging threshold of physical properties and pore-throat characteristics. The results showed that the pore size of tight reservoirs is dominated by nanometer and submicron scale, and the average pore radius is 1.2 μm. The average radius of throat is 0.1 μm, which belongs to micropore-fine throat reservoirs. It was calculated that the charging threshold of porosity of Chang 8 tight sandstone reservoirs is 4.5%, and that of permeability is 0.04×10^-3 μm². The threshold of pore-throat diameter on the source and reservoir interface is 15.77 nm, and that inside reservoir is 24 nm. We integrated that oil and gas might occur in nano-scale pores as oil bead, throat or thin film as compaction and cementation effects became stronger.
- microstructure /
- tight reservoir /
- hydrocarbon charging threshold /
- occurrence /
- Chang 8 member /
- Fuxian area /
- Ordos Basin

HTML全文

参考文献(37)

[1]	孙赞东,贾承造,李相方,等.非常规油气勘探与开发(上册)[M].北京:石油工业出版社,2011. SUN Zandong,JIA Chengzao,LI Xiangfang,et al.Unconventional oil & gas exploration and development:Upper volume[M].Beijing:Petroleum Industry Press,2011.
[2]	邹才能,陶士振,侯连华,等.非常规油气地质[M].北京:地质出版社,2011:1-300. ZOU Caineng,TAO Shizhen,HOU Lianhua,et al.Unconventional petroleum geology[M].Beijing:Geological Publishing House,2011:1-300.
[3]	林森虎,邹才能,袁选俊,等.美国致密油开发现状及启示[J].岩性油气藏,2011,23(4):25-30. LIN Senhu,ZOU Caineng,YUAN Xuanjun,et al.Status quo of tight oil exploitation in the United States and its implication[J].Lithologic Reservoirs,2011,23(4):25-30.
[4]	贾承造,邹才能,李建忠,等.中国致密油评价标准、主要类型、基本特征及资源前景[J].石油学报,2012,33(3):343-350. JIA Chengzao,ZOU Caineng,LI Jianzhong,et al.Assessment criteria,main types,basic features and resource prospects of the tight oil in China[J].Acta Petrolei Sinica,2012,33(3):343-350.
[5]	李文厚,庞军刚,曹红霞,等.鄂尔多斯盆地晚三叠世延长期沉积体系及岩相古地理演化[J].西北大学学报(自然科学版),2009,39(3):501-506. LI Wenhou,PANG Jungang,CAO Hongxia,et al.Depositional system and paleogeographic evolution of the Late Triassic Yanchang Stage in Ordos Basin[J].Journal of Northwest University(Natural Science Edition),2009,39(3):501-506.
[6]	姚泾利,赵彦德,邓秀芹,等.鄂尔多斯盆地延长组致密油成藏控制因素[J].吉林大学学报(地球科学版),2015,45(4):983-992. YAO Jingli,ZHAO Yande,DENG Xiuqin,et al.Controlling factors of tight oil reservoir in Triassic Yanchang Formation in Ordos Basin[J].Journal of Jilin University (Earth Science Edition),2015,45(4):983-992.
[7]	杜金虎,何海清,杨涛,等.中国致密油勘探进展及面临的挑战[J].中国石油勘探,2014,19(1):1-9. DU Jinhu,HE Haiqing,YANG Tao,et al.Progress in China's tight oil exploration and challenges[J].China Petroleum Exploration,2014,19(1):1-9.
[8]	崔景伟,朱如凯,吴松涛,等.致密砂岩层内非均质性及含油下限:以鄂尔多斯盆地三叠系延长组长7段为例[J].石油学报,2013,34(5):877-882. CUI Jingwei,ZHU Rukai,WU Songtao,et al.Heterogeneity and lower oily limits for tight sandstones:A case study on Chang-7 oil layers of the Yanchang Formation,Ordos Basin[J].ActaPetrolei sinica,2013,34(5):877-882.
[9]	杨智峰,曾溅辉,冯枭,等.致密砂岩储层小尺度非均质性与石油富集特征[J].中国矿业大学学报,2016,45(1):119-127. YANG Zhifeng,ZENG Jianhui,FENG Xiao,et al.Small-scaled heterogeneity of tight sandstone reservoirs and oil accumulation characteristics[J].Journal of China University of Mining & Technology,2016,45(1):119-127.
[10]	杨华,李士祥,刘显阳.鄂尔多斯盆地致密油、页岩油特征及资源潜力[J].石油学报,2013,34(1):1-11. YANG Hua,LI Shixiang,LIU Xianyang.Characteristics and resource prospects of tight oil and shale oil in Ordos Basin[J].Acta Petrolei Sinica,2013,34(1):1-11.
[11]	ARNS C H,BAUGET F,GHOUS A,et al.Digital core laboratory:Petrophysical analysis from 3D imaging of reservoir core fragments[J].Petrophysics,2005,46(4):260-277.
[12]	LATHAM S,VARSLOT T,SHEPPARD A.Image registration:Enhancing and calibrating X-ray micro-CT imaging[R].Abu Dhabi,UAE:Society of Core Analysts,2008.
[13]	LOUCKS R G,REED R M,RUPPEL S C,et al.Morphology, genesis, and distribution of nanometer-scale pores in siliceous mudstones of the Mississippian Barnett shale[J].Journal of Sedimentary Research,2009,79(12):848-861.
[14]	NELSONP H.Pore-throat sizes in sandstones,tightsandstones,andshales[J].AAPG Bulletin,2009,93(3):329-340.
[15]	DESBOIS G,URAI J L,KUKLA P A,et al.High-resolution 3D fabric and porosity model in a tight gas sandstone reservoir:A new approach to investigate microstructures from mm-to nm-scale combining argon beam cross-sectioning and SEM imaging[J].Journal of Petroleum Science and Engineering,2011,78(2):243-257.
[16]	孙怡.成藏动力对束缚水饱和度的影响[J].油气地质与采收率,2007,14(2):64-66. SUN Yi.The influence of reservoir-forming dynamic on irreducible water saturation[J].Petroleum Geology and Recovery Efficiency,2007,14(2):64-66.
[17]	牛小兵,冯胜斌,刘飞,等.低渗透致密砂岩储层中石油微观赋存状态与油源关系:以鄂尔多斯盆地三叠系延长组为例[J].石油与天然气地质,2013,34(3):288-293. NIU Xiaobing,FENG Shengbin,LIU Fei,et al.Microscopic occurrence of oil in tight sandstones and its relation with oil sources:A case study from the Upper Triassic Yanchang Formation,Ordos Basin[J].Oil & Gas Geology,2013,34(3):288-293.
[18]	邹才能,朱如凯,白斌,等.中国油气储层中纳米孔首次发现及其科学价值[J].岩石学报,2011,27(6):1857-1864. ZOU Caineng,ZHU Rukai,BAI Bin,et al.First discovery of nano-pore throat in oil and gas reservoir in China and its scientific value[J].Acta Petrologica Sinica,2011,27(6):1857-1864.
[19]	任战利,李文厚,梁宇,等.鄂尔多斯盆地东南部延长组致密油成藏条件及主控因素[J].石油与天然气地质,2014,35(2):190-198. REN Zhanli,LI Wenhou,LIANG Yu,et al.Tight oil reservoir formation conditions and main controlling factors of Yanchang Formation in southeastern Ordos Basin[J].Oil & Gas Geology,2014,35(2):190-198.
[20]	于强,任战利,倪军,等.鄂尔多斯盆地富县地区中生界热演化史探讨[J].西北大学学报(自然科学版),2012,42(5):801-805. YU Qiang,REN Zhanli,NI Jun,et al.The thermal evolution history of Mesozoic,Fuxian exploratory area of Ordos Basin[J].Journal of Northwest University (Natural Science Edition),2012,42(5):801-805.
[21]	柳娜,南珺祥,刘伟,等.长7致密砂岩微观孔喉结构测试及特征[J].石油化工应用,2014,33(7):7-13. LIU Na,NAN Junxiang,LIU Wei,et al.Test method and characteristics for micro-pore throat structure of Chang7 tight sandstone reservoirs[J].Petrochemical Industry Application,2014,33(7):7-13.
[22]	赵澄林,胡爱梅,陈碧珏,等.SY/T 6285-1997油气储层评价方法[S].北京:石油工业出版社,1998:8-9. ZHAO Chenglin,HU Aimei,CHEN Bijue,et al.SY/T6285-1997 Evaluating methods of oil and gas reservoirs[S].Beijing:Petroleum Industry Press,1998:8-9.
[23]	白斌,朱如凯,吴松涛,等.利用多尺度CT成像表征致密砂岩微观孔喉结构[J].石油勘探与开发,2013,40(3):329-333. BAI Bin,ZHU Rukai,WU Songtao,et al.Multi-scale method of nano(micro)-CT study on microscopic pore structure of tight sandstone of Yanchang Formation,Ordos Basin[J].Petroleum Exploration and Development,2013,40(3):329-333.
[24]	张洪,柳少波,张水昌,等.四川公山庙油田致密砂岩油充注孔喉下限探讨及应用[J].天然气地球科学,2014,25(5):693-700. ZHANG Hong,LIU Shaobo,ZHANG Shuichang,et al.Discussion on oil-charging threshold of throat in tight sandstone in Gongshanmiao Oilfield,Sichuan and its application[J].Natural Gas Geoscience,2014,25(5):693-700.
[25]	白玉彬.鄂尔多斯盆地吴堡地区长7致密储层成岩演化与成藏过程耦合机理[D].西安:西北大学,2013. BAI Yubin.The coupling mechanism of the diagenetic evolution and oil accumulation process of Chang-7 tight sandstone reservoir in Wubao area,Ordos Basin[D].Xi'an:Northwest University,2013.
[26]	任战利,于强,崔军平,等.鄂尔多斯盆地热演化史及其对油气的控制作用[J].地学前缘,2017,24(3):137-148. REN Zhanli,YU Qiang,CUI Junping,et al.Thermal history and its controls on oil and gas of the Ordos Basin[J].Earth Science Frontiers,2017,24(3):137-148.
[27]	郭继刚,郭凯,宫鹏骐,等.鄂尔多斯盆地延长组储层致密化及其影响下的致密油充注特征[J].石油实验地质,2017,39(2):169-179. GUO Jigang,GUO Kai,GONG Pengqi,et al.Reservoir densification and tight-oil charging in Yanchang Formation,Ordos Basin[J].Petroleum Geology & Experiment,2017,39(2):169-179.
[28]	付金华,邓秀芹,王琪,等.鄂尔多斯盆地三叠系长8储集层致密与成藏耦合关系:来自地球化学和流体包裹体的证据[J].石油勘探与开发,2017,44(1):48-57. FU Jinhua,DENG Xiuqin,WANG Qi,et al.Compaction and hydrocarbon accumulation of Triassic Yanchang Formation Chang 8 Member,Ordos Basin,NW China:Evidence from geochemistry and fluid inclusions[J].Petroleum Exploration and Development,2017,44(1):48-57.
[29]	张洪,张水昌,柳少波,等.致密油充注孔喉下限的理论探讨及实例分析[J].石油勘探与开发,2014,41(3):367-374. ZHANG Hong,ZHANG Shuichang,LIU Shaobo,et al.A theoretical discussion and case study on the oil-charging throat threshold for tight reservoirs[J].Petroleum Exploration and Development,2014,41(3):367-374.
[30]	李兴训.对用渗透率贡献值法求原始含油饱和度的讨论[J].新疆石油地质,1989,10(4):81-85. LI Xingxun.Discussion of estimating original oil saturation with the permeability bution values method[J].Xinjiang Petroleum Geology,1989,10(4):81-85.
[31]	马洪,李建忠,杨涛,等.中国陆相湖盆致密油成藏主控因素综述[J].石油实验地质,2014,36(6):668-677. MA Hong,LI Jianzhong,YANG Tao,et al.Main controlling factors for tight oil accumulation in continental lacustrine basins in China[J].Petroleum Geology & Experiment,2014,36(6):668-677.
[32]	BERG R R,GANGI A F.Primary migration by oil-generation microfracturing in low-permeability source rocks:Application to the Austin Chalk,Texas[J].AAPG Bulletin,1999,83(5):727-756.
[33]	白玉彬.鄂尔多斯盆地长7致密油成藏机理与富集规律[M].西安:石油工业出版社,2014:1-128. BAI Yubin.The enrichment regularity and accumulation mechanism of Chang-7 tight oil of Ordos Basin[M].Xi'an:Petroleum Industry Press,2014:1-128.
[34]	SCHOWALTER W R.Mechanics of non-Newtonian fluids[M].New York:Pergamon Press,1978:160-161.
[35]	任战利.鄂尔多斯盆地热演化史与油气关系的研究[J].石油学报,1996,17(1):17-24. REN Zhanli.Research on the relations between geothermal history and oil-gas accumulation in the Ordos Basin[J].Acta Petrolei Sinica,1996,17(1):17-24.
[36]	于强.鄂尔多斯盆地南部中生界热演化史及其与多种能源关系研究[D].西安:西北大学,2009. YU Qiang.The thermal evolution history of Ordos Basin Mesozoic and its relationship with various energy mineral deposit[D].Xi'an:Northwest University,2009.
[37]	王明磊,张遂安,张福东,等.鄂尔多斯盆地延长组长7段致密油微观赋存形式定量研究[J].石油勘探与开发,2015,42(6):757-762. WANG Minglei,ZHANG Sui'an,ZHANG Fudong,et al.Quantitative research on tight oil microscopic state of Chang 7 Member of Triassic Yanchang Formation in Ordos Basin,NW China[J].Petroleum Exploration and Development,2015,42(6):757-762.