鄂尔多斯盆地长7段致密油成藏物性下限研究

吴康军; 刘洛夫; 徐正建; 窦文超; 罗安湘; 付金华; 谭先锋

doi:10.11781/sysydz201601063

鄂尔多斯盆地长7段致密油成藏物性下限研究

doi: 10.11781/sysydz201601063

吴康军^1,2,
刘洛夫^1,2, ,,
徐正建^1,2,
窦文超^1,2,
罗安湘³,
付金华³,
谭先锋⁴

1.
中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249
2. 中国石油大学(北京)盆地与油藏研究中心, 北京 102249
3. 中国石油长庆油田公司, 西安 710018
4. 重庆科技学院, 重庆 401331

基金项目: 国家自然科学基金项目"鄂尔多斯盆地三叠系延长组致密油含油边界识别研究"(41372143)、"济阳坳陷古近系孔店组旋回沉积机理及成岩系统研究"(41202043)和教育部高等学校博士学科点专项科研基金"致密油含油边界确定的新方法"(20130007110002)资助。

详细信息

作者简介:
吴康军(1983-),男,博士研究生,从事油气成藏方面的研究。E-mail:wukangjun520@163.com。

通讯作者:
刘洛夫(1958-),男,教授,博士生导师,从事石油地质及油藏地球化学方面的研究。E-mail:liulf@cup.edu.cn。

中图分类号: TE122.3
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出版历程
- 收稿日期: 2014-12-24
- 修回日期: 2015-11-26
- 刊出日期: 2016-01-28

Lower limits of pore throat radius, porosity and permeability for tight oil accumulations in the Chang7 Member, Ordos Basin

1.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China
2. Basin and Reservoir Research Center, China University of Petroleum(Beijing), Beijing 102249, China
3. PetroChina Changqing Oilfield Company, Xi'an, Shaanxi 710018, China
4. Chongqing University of Science and Technology, Chongqing 401331, China

摘要

摘要: 鄂尔多斯盆地延长组长7段致密砂岩储层在湖盆中心大面积分布,成藏期的储层物性下限是决定油气是否充注储层的重要参数。运用恒速压汞和纳米CT扫描技术分析了长7段湖盆中心渗透率小于0.3×10^-3 μm²、孔隙度小于12%的致密砂岩储层的物性及微观孔喉特征。结果表明,其平均孔隙半径为160μm,喉道半径不超过0.55μm,均值为0.33μm。在分析致密油成藏期储源压差、原油物理性质及盆地流体特征的基础上,结合致密储层油气驱替模拟实验及最小流动孔喉半径法,综合确定了研究区长7段致密油成藏期油气开始充注时的孔喉下限为14 nm,孔隙度下限为4.2%,渗透率下限为0.02×10^-3 μm²,要达到含油饱和度超过40%而实现致密油的大面积连续分布,孔喉半径下限应为0.12μm,孔隙度下限为7.3%,渗透率下限值为0.07×10^-3μm²。
- 物性下限 /
- 油气成藏 /
- 致密储层 /
- 致密油 /
- 延长组 /
- 鄂尔多斯盆地
Abstract: Tight sandstone reservoirs were found widespread in the seventh member of Yanchang Formation (Chang7) in the central Ordos Basin. The lower limit of reservoir porosity and permeability during the accumulation period was critical for hydrocarbon enrichment. We studied these physical properties and microscopic pore throat characteristics of tight sandstones with permeability <0.3×10^-3μm² and porosity < 12% by means of constant-rate mercury injection and Nano-CT scan. The average pore radius is 160μm, and the throat radius is < 0.55μm, average 0.33μm. We analyzed the pressure differential between source rocks and reservoirs, the physical properties of crude oils, and fluid characteristics. Oil and gas displacement simulations in tight gas reservoirs and minimum flow pore throat radius method showed that the Chang7 tight reservoirs in the study area had a minimum pore throat radius of 14 nm, porosity of 4.2%, and permeability of 0.02×10^-3 μm² during hydrocarbon enrichment period. To form large tight oil reservoirs with an oil saturation > 40%, the lower limits for pore throat radius, porosity and permeability should be 0.12μm, 7.3% and 0.07×10^-3μm², respectively.
- lower limits of physical properties /
- oil accumulation /
- tight reservoir /
- tight oil /
- Yanchang Formation /
- Ordos Basin

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参考文献(27)

[1]	郭睿.储集层物性下限值确定方法及其补充[J].石油勘探与开发,2004:31(5):140-144. Guo Rui.Supplement to determining method of cut-off value of net pay[J].Petroleum Exploration and Development,2004:31(5):140-144.
[2]	张安达,潘会芳.致密储层物性下限确定新方法及其应用[J].断块油气田,2014,21(5):623-626. Zhang Anda,Pan Huifang.New methods to determine physical property lower limit of tight reservoir and their application[J].Fault-Block Oil and Gas Field,2014,21(5):623-626.
[3]	付金华,罗安湘,张妮妮,等.鄂尔多斯盆地长7油层组有效储层物性下限的确定[J].中国石油勘探,2014,19(6):82-88. Fu Jinhua,Luo Anxiang,Zhang Nini,et al.Determine lower limits of physical properties of effective reservoirs in Chang 7 Oil Formation in Ordos Basin[J].China Petroleum Exploration,2014,19(6):82-88.
[4]	李文浩,张枝焕,昝灵,等.渤南洼陷北部陡坡带沙河街组砂砾岩有效储层物性下限及其主控因素[J].石油与天然气地质,2012,33(5):766-777. Li Wenhao,Zhang Zhihuan,Zan Ling,et al.Lower limits of phy-sical properties and their controlling factors of effective coarse-grained clastic reservoirs in the Shahejie Formation on northern steep slope of Bonan Subsag,the Bohai Bay Basin[J].Oil & Gas Geology,2012,33(5):766-777.
[5]	刘莉莉,徐文,石石,等.苏里格气田致密砂岩气藏有效储层建模方法[J].油气地质与采收率,2015,22(3):47-51. Liu Lili,Xu Wen,Shi Shi,et al.A new effective reservoir modeling method for tight sandstone gas reservoir in Sulige gas field[J].Petroleum Geology and Recovery Efficiency,2015,22(3):47-51.
[6]	高岗,沈霞,韩永林.低孔低渗背景下砂体输导物性下限及其对石油运聚的影响:以鄂尔多斯盆地胡尖山地区延长组长4+5段和长6段为例[J].高校地质学报,2010,16(3):351-357. Gao Gang,Shen Xia,Han Yonglin.The physical properties' lowest limit values in sandstone conducting system and their affections to oil accumulation in the setting of low porosity and permeability:Taking Chang (4+5) and Chang 6 sections of Yanchang Formation in Hujianshan area of Ordos Basin for example[J].Geological Journal of China Universities,2010,16(3):351-357.
[7]	司马立强,吴思仪,袁龙,等.致密砂岩油藏有效厚度的确定方法:以苏北盆地阜宁组和戴一段为例[J].油气地质与采收率,2014,21(5):57-60,72. Sima Liqiang,Wu Siyi,Yuan Long,et al.Determination and application of effective thickness of tight sandstone reservoirs:an example from Funing Formation and Daiyi Member in Subei basin[J].Petroleum Geology and Recovery Efficiency,2014,21(5):57-60,72.
[8]	刘雅利.断陷盆地连续型油气藏分布范围的确定方法:以渤南地区沙四段为例[J].油气地质与采收率, 2015,22(2):1-8. Liu Yali.A method of determining distribution of continuous hydrocarbon reservoir in faulted basin-a case of the fourth member of Shahejie Formation in Bonan area[J].Petroleum Geology and Recovery Efficiency,2015,22(2):1-8.
[9]	潘高峰,刘震,赵舒,等.鄂尔多斯盆地镇泾地区长8段致密砂岩油藏成藏孔隙度下限研究[J].现代地质,2011,25(2):271-278. Pan Gaofeng,Liu Zhen,Zhao Shu,et al.The study on lower limit of porosity for oil accumulation in Chang-8 Member,Zhenjing area,Ordos Basin[J].Geoscience,2011,25(2):271-278.
[10]	刘震,刘静静,王伟,等.低孔渗砂岩石油充注临界条件实验:以西峰油田为例[J].石油学报,2012,33(6):996-1002. Liu Zhen,Liu Jingjing,Wang Wei,et al.Experimental analyses on critical conditions of oil charge for low-permeability sandstones:a case study of Xifeng oilfield,Ordos Basin[J].Acta Petrolei Sinica,2012,33(6):996-1002.
[11]	张妮妮,刘洛夫,苏天喜,等.鄂尔多斯盆地延长组长7段与威利斯顿盆地Bakken组致密油形成条件的对比及其意义[J].现代地质,2013,27(5):1120-1130. Zhang Nini,Liu Luofu,Su Tianxi,et al.Comparison of Chang 7 member of Yanchang formation in Ordos Basin with Bakken Formation in Williston Basin and its significance[J].Geosciences,2013,27(5):1120-1130.
[12]	杨华,张文正,刘显阳,等.优质烃源岩在鄂尔多斯低渗透富油盆地形成中的关键作用[J].地球科学与环境学报,2013,35(4):1-9. Yang Hua,Zhang Wenzheng,Liu Xianyang,et al.Key Role of high-quality source rocks on the formation of low-permeability oil-rich reservoirs in Ordos Basin[J].Journal of Earth Sciences and Environment,2013,35(4):1-9.
[13]	薛永超,田虓丰.鄂尔多斯盆地长7致密油藏特征[J].特种油气藏,2014,21(3):111-115. Xue Yongchao,Tian Xiaofeng.Characteristics of Chang-7 tight oil reservoir,Ordos basin[J].Special Oil & Gas Reservoirs,2014,21(3):111-115.
[14]	李威,文志刚.鄂尔多斯盆地马岭地区延长组长7烃源岩特征与分布[J].断块油气田,2014,21(1):24-27. Li Wei,Wen Zhigang.Characteristics and distribution of Chang 7 source rocks of Yangchang Formation in Maling Area of Ordos Basin[J].Fault-Block Oil and Gas Field,2014,21(1):24-27.
[15]	吉利明,梁晓飞,贺聪,等.鄂尔多斯盆地西峰地区延长组烃源岩两环烷烃分布特征及其生源[J].地球科学与环境学报,2015,37(1):76-84. Ji Liming,Liang Xiaofei,He Cong,et al.Distribution of bicyclic alkanes of source rocks of Yanchang Formation in Xifeng Area of Ordos Basin and their biological sources[J].Journal of Earth Sciences and Environment,2015,37(1):76-84.
[16]	邹才能,朱如凯,吴松涛,等.常规与非常规油气聚集类型、特征、机理及展望:以中国致密油和致密气为例[J].石油学报,2012,33(2):173-187. Zou Caineng,Zhu Rukai,Wu Songtao,et al.Types,characteristics,genesis and prospects of conventional and unconventional hydrocarbon accumulations:taking tight oil and tight gas in China as an instance[J].Acta Petrolei Sinica,2012,33(2):173-187.
[17]	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.
[18]	赵孟为,Behr H J.鄂尔多斯盆地三叠系镜质体反射率与地热史[J].石油学报,1996,17(2):15-23. Zhao Mengwei,Behr H J.Vitrinite reflectance in Triassic with relation to geothermal history of Ordos Basin[J].Acta Petrolei Sinica,1996,17(2):15-23.
[19]	任战利,张盛,高胜利,等.鄂尔多斯盆地热演化程度异常分布区及形成时期探讨[J].地质学报,2006,80(5):674-684. Ren Zhanli,Zhang Sheng,Gao Shengli,et al.Research on region of maturation anomaly and formation time in Ordos Basin[J].Acta Geologica Sinica,2006,80(5):674-684.
[20]	姚泾利,邓秀芹,赵彦德,等.鄂尔多斯盆地延长组致密油特征[J].石油勘探与开发,2013,40(2):150-158. Yao Jingli,Deng Xiuqin,Zhao Yande,et al.Characteristics of tight oil in Triassic Yanchang Formation,Ordos Basin[J].Petroleum Exploration and Development,2013,40(2):150-158.
[21]	李兴文,李仲东,过敏,等.鄂尔多斯麻黄山西区中生界过剩压力与油气关系[J].石油勘探与开发,2011,38(3):294-298. Li Xingwen,Li Zhongdong,Guo Min,et al.Relations of overpressure and hydrocarbons in the Mesozoic of western Mahuang-shan,Ordos Basin[J].Petroleum Exploration and Development,2011,38(3):294-298.
[22]	邓秀芹,姚泾利,胡喜锋,等.鄂尔多斯盆地延长组超低渗透岩性油藏成藏流体动力系统特征及其意义[J].西北大学学报:自然科学版,2011,41(6):1044-1050. Deng Xiuqin,Yao Jingli,Hu Xifeng,et al.Characteristics and geological significance of hydrodynamic system on ultra-low permeability reservoir of Yanchang Formation in Ordos Basin[J].Journal of Northwest University:Natural Science Edition,2011,41(6):1044-1050.
[23]	蒋裕强,高阳,徐厚伟,等.基于启动压力梯度的亲水低渗透储层物性下限确定方法:以蜀南河包场地区须家河组气藏为例[J].油气地质与采收率,2010,17(5):57-60. Jiang Yuqiang,Gao Yang,Xu Houwei,et al.Now method for determining cut-off parameter in hydrophilic and low permeable sandstone reservoir:case of gas reservoir,Hebaochang area[J].Petro-leum Geology and Recovery Efficiency,2010,17(5):57-60.
[24]	Wardlaw N C,Taylor R P.Mercury capillary pressure curves and the interpretation of pore structure and capillary behaviour in reservoir rocks[J].Bulletin of Canadian Petroleum Geology,1976,24(2):225-262.
[25]	朱志强,曾溅辉,吴河勇,等.低渗透砂岩石油运移及成藏特征模拟实验[J].石油与天然气地质,2007,28(2):229-234. Zhu Zhiqiang,Zeng Jianhui,Wu Heyong,et al.An experimental study on oil migration and accumulation in low-permeability sandstone[J].Oil & Gas Geology,2007,28(2):229-234.
[26]	樊阳,查明,姜林,等.致密砂岩气充注机制及成藏富集规律[J].断块油气田,2014,21(1):1-6. Fan Yang,Zha Ming,Jiang Lin,et al.Charging mechanism of tight sandstone gas reservoir and its pattern of accumulation and enrichment[J].Fault-Block Oil and Gas Field,2014,21(1):1-6.
[27]	公言杰,柳少波,刘可禹,等.致密油充注过程中储层润湿性变化对含油性影响:以川中侏罗系致密油为例[J].石油实验地质,2015,37(4):423-429. Gong Yanjie,Liu Shaobo,Liu Keyu,et al.Influence of reservoir wet ability changes on oil-bearing features during tight oil accumulation:A case study of Jurassic tight oils in Sichuan Basin[J].Petroleum Geology & Experiment,2015,37(4):423-429.