华庆油田长8超低渗透砂岩油藏水驱微观机理
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摘要
为探讨超低渗透砂岩油藏水驱开发中不同级别孔隙的动用及残余油赋存等问题,对鄂尔多斯盆地华庆地区延长组长8段典型岩样开展水驱油核磁共振实验。定义区间驱油效率、驱油效率贡献,根据核磁共振T2谱形态,分弛豫时间<10ms孔隙区间、弛豫时间> 10ms孔隙区间、总孔隙区间讨论饱和油状态、水驱最终状态各孔隙区间的含油饱和度、动用含油饱和度、残余油饱和度、驱油效率贡献、区间驱油效率及其与渗透率的相关关系。研究表明,渗透率<0. 07×10-3μm~2,原油主要赋存在弛豫时间<10ms孔隙区间;渗透率> 0. 07×10-3μm~2,原油主要赋存在弛豫时间> 10ms孔隙区间。弛豫时间>10ms孔隙,油气富集程度对渗透率更敏感。渗透率越低,弛豫时间> 10ms孔隙的区间驱油效率越高,但其总体积偏低,故水驱开发早期产量高,产量递减快(弛豫时间<10ms孔隙的区间驱油效率增加缓慢),这与该类油藏水驱开发特征相吻合。无论渗透率如何低,弛豫时间> 10ms孔隙区间的动用含油饱和度、驱油效率贡献始终高于弛豫时间<10ms孔隙区间。油藏水驱开发阶段,调整挖潜的对象始终在弛豫时间>10ms孔隙部分。水驱结束后,渗透率>0. 48×10-3μm~2的油藏,残余油主要集中在弛豫时间>10ms孔隙;渗透率<0. 48×10-3μm~2的油藏,残余油主要集中在弛豫时间<10ms孔隙,这为油藏水驱开发后实施提高采收率技术指明方向。
In order to discuss the producing of pores of different orders and the occurrence of residual oil in ultra-low permeability sandstone reservoirs,the NMR experiment of water flooding was carried out in the Chang 8 member of Yanchang Formation in the Huaqing area of Ordos basin. We defined the interval oil displacement efficiency and contribution of oil displacement efficiency. According to the NMR T2 spectrum,the pores were divided into < 10 ms pores,> 10 ms pores and total pores,and we studied the oil saturation,producing oil saturation,residual oil saturation,contribution of displacement efficiency,interval displacement efficiency of pore interval,and their correlation with the permeability in saturated oil and water drive final state. The results show that when the permeability is less than 0. 07 × 10~(-3)μm~2,the oil mainly occurs in <10 ms pores. When the permeability is more than 0.07 ×10~(-3)μm~2,the crude oil appears in > 10 ms pores. In > 10 ms pores,the degree of hydrocarbon enrichment is more sensitive to the permeability. The lower the permeabilityis,the higher the oil displacement efficiency of > 10 ms poresis,but the total volume is lower. Therefore,the production is high in the early stage of waterflooding exploitation,and the production decreases faster( < 10 ms interval increase of oil displacement efficiency is slow). This matches the characteristics of waterflooding development. No matter how low the permeabilityis,the producing oil saturation and the contribution of displacement efficiency of> 10 ms pores are always higher than < 10 ms pores. During the waterflooding development stage of the reservoir,the object of adjusting potential is always > 10 ms pores portion. When the permeability is more than 0. 48 × 10~(-3)μm~2,the residual oil is mainly concentrated in > 10 ms pores. When the permeability is less than 0. 48 × 10~(-3)μm~2 after waterflooding,the residual oil is mainly concentrated in < 10 ms pores which indicates the direction for the implementation of EOR technology after the end of reservoir water flooding.
In order to discuss the producing of pores of different orders and the occurrence of residual oil in ultra-low permeability sandstone reservoirs,the NMR experiment of water flooding was carried out in the Chang 8 member of Yanchang Formation in the Huaqing area of Ordos basin. We defined the interval oil displacement efficiency and contribution of oil displacement efficiency. According to the NMR T2 spectrum,the pores were divided into < 10 ms pores,> 10 ms pores and total pores,and we studied the oil saturation,producing oil saturation,residual oil saturation,contribution of displacement efficiency,interval displacement efficiency of pore interval,and their correlation with the permeability in saturated oil and water drive final state. The results show that when the permeability is less than 0. 07 × 10~(-3)μm~2,the oil mainly occurs in <10 ms pores. When the permeability is more than 0.07 ×10~(-3)μm~2,the crude oil appears in > 10 ms pores. In > 10 ms pores,the degree of hydrocarbon enrichment is more sensitive to the permeability. The lower the permeabilityis,the higher the oil displacement efficiency of > 10 ms poresis,but the total volume is lower. Therefore,the production is high in the early stage of waterflooding exploitation,and the production decreases faster( < 10 ms interval increase of oil displacement efficiency is slow). This matches the characteristics of waterflooding development. No matter how low the permeabilityis,the producing oil saturation and the contribution of displacement efficiency of> 10 ms pores are always higher than < 10 ms pores. During the waterflooding development stage of the reservoir,the object of adjusting potential is always > 10 ms pores portion. When the permeability is more than 0. 48 × 10~(-3)μm~2,the residual oil is mainly concentrated in > 10 ms pores. When the permeability is less than 0. 48 × 10~(-3)μm~2 after waterflooding,the residual oil is mainly concentrated in < 10 ms pores which indicates the direction for the implementation of EOR technology after the end of reservoir water flooding.
引文
Dai Quan-qi,Luo Qun,Zhang Chen,Lu Chao-jin,Zhang Yun-zhao,Lu Shao-jie,Zhao Yan.2016.Pore structure characteristics of tight-oil sandstone reservoir based on a new parameter measured by NMR experiment:A case study of seventh member in Yanchang Formation,Ordos Basin[J].Acta Petrolei Sinica,37(7):887-897(in Chinese with English abstract)
Fang Guo-qing,Fan Jian-ming,He Yong-hong,Li Shu-heng.2012.Enhanced oil recovery mechanisms of“hot water+surfactant”flooding and quantitative evaluation of their contribution to the productivity of tight sandstone reservoirs[J].Journal of Xi'an Shiyou University(Natural Science Edition),27(6):57-60(in Chinese with English abstract)
Ji Shu-hong,Tian Chang-bing,Shi Cheng-fang,Yi Ji-geng,Zhang Zu-bo,Fu Xiu-juan.2012.New understanding on water-oil displacement efficiency in a high water-cut stage[J].Petroleum Exploration and Development,39(3):338-345(in Chinese with English abstract)
Li Hai-bo,Guo He-kun,Yang Zheng-ming,Wang Xue-wu.2015.Tight oil occurrence space of Triassic Chang 7 member in northern Shaanxi area,Ordos basin,NW China[J].Petroleum Exploration and Development,42(3):396-400(in Chinese with English abstract)
Li Zhong-xing,Qu Xue-feng,Liu Wan-tao,Lei Qi-hong,Sun Hua-ling,He You-an.2015.Development modes of Triassic Yanchang Formation Chang 7 member tight oil in Ordos basin,NW China[J].Petroleum Exploration and development,42(2):217-221(in Chinese with English abstract)
Li Bai-chuan,Zhou Ju-biao,Ding Yu-sheng,Li Xiang-zhu,Liu Yi-dan,Wang Meng-qi.2016.Experimental study of reservoir physical property change and water flooding under different overburden pressures[J].Journal of Shandong University of Science and Technology(Natural Science),35(2):22-28(in Chinese with English abstract)
Liang Xiao-wei,Hao Bing-ying,Yang xiao,Niu Xiao-bing,Feng Shengbin,You Yuan.2017.The characteristics of tight oil development by horizontal well with domain stimulation in the pilot test in Ordos basin[J].Journal of Northwest University(Natural Science Edition),47(2):259-264(in Chinese with English abstract)
Nasralla R A,Mahani H,Linde HAVD,Marcelis FHM,Masalmeh SK.2016.Low salinity waterflooding for a carbonate reservoir:Experimental evaluation and numerical interpretation[J].Journal of Petroleum Science&Engineering,164:640-654
Qu Xue-feng,Fan Jian-ming,Wang Chong,Zhao Guo-xi,Shi Jian-chao.2017.Impact of fractures on water flooding seepage features of Chang 7 tight cores in Longdong area,Ordos basin[J].Journal of Xi'an Shiyou University(Natural Science Edition),32(5):4370-4376(in Chinese with English abstract)
Ren Da-zhong,Sun Wei,Zhao Ji-yong,Qu Xue-feng,Zhang xi.2015.Microscopic waterflooding characteristics of lithologic reservoirs in Ordos basin and its influence factors:Taking the Chang 81reservoir in Huaqing oilfield as an example[J].Journal of China University of Mining&Technology,44(6):1043-1052(in Chinese with English abstract)
Xu Chang-fu,Liu Hong-xian,Qian Gen-bao,Qin Jian-hua.2011.Microcosmic mechanisms of water-oil displacement in conglomerate reservoirs in Karamay oilfield,NW China[J].Petroleum Exploration and Development,38(6):725-732(in Chinese with English abstract)
Yakov V,Looyestijn W J,Slijkerman W F J,Hofman J P.2001.A practical approach to obtain primary drainage capillary pressure curves from NMR core and log data[J].Petrophysics,42(4):334-343
Yang Hua,Fu Jin-hua,He Hai-qing,Liu Xian-yang,Zhang Zhong-yi,Deng Xiu-qin.2012.Formation and distribution of large low-permeability lithologic oil regions in Huaqing,Ordos basin[J].Petroleum Exploration and Development,39(6):641-648(in Chinese with English abstract)
Yang Tao,Xie Jun,Zhou Ju-biao,Wang Jin-kai,Wang Meng-qi.2018.NMR features and contributing factors of movable fluid in low porosity and ultra-low permeability sandstone reservoir:Taking the 2nd member of Funing formation in T89 Block of Wanglongzhuang oilfield as an example[J].Journal of Shandong University of Science and Technology(Natural Science),37(1):119-126(in Chinese with English abstract)
Wang Rui-fei,Chen Ming-qiang.2008.Characteristics and influencing factors of movable fluid in ultra-low permeability sandstone reservoir[J].Acta Petrolei Sinica,29(4):558-561,566(in Chinese with English abstract)
Wang Rui-fei,Sun Wei,Yang Hua.2010.Micro mechanism of water drive in ultra-low permeability sandstone reservoir[J].Journal of Lanzhou University(Natural Science),46(6):29-33(in Chinese with English abstract)
Zha Ming,Su Yang,Gao Chang-hai,Qu Jiang-xiu,Wang Xu-long,Ding Xiu-jian.2017.Tight reservoir space characteristics and controlling factors:An example from Permian Lucaogou Formation in Jimsar sag,Junggar basin,northwest China[J].Journal of China University of Mining&Technology,46(1):85-95(in Chinese with English abstract)
Zhang Yong-gang,Chen Yan,Deng Xue-feng,Wei Kai-peng,Wang Juanjuan.2016.Depressurized-augmented injection and enhanced oil recovery by the surfactant for the ultra-low-permeability oil reservoir[J].Petroleum Geology and Oilfield Development in Daqing,35(1):126-130
Zhao Ji-yong,Fan Jian-ming,He Yong-hong,Yang Zi-qing,Gao-Wei,Gao Wu-bin.2015.Optimization of horizontal well injection-production parameters for ultra-low permeable-tight oil production:A case from Changqing oilfield,Ordos basin[J].Petroleum exploration and development,42(1):68-75(in Chinese with English abstract)
代全齐,罗群,张晨,卢朝进,张云钊,鲁少杰,赵岩.2016.基于核磁共振新参数的致密油砂岩储层孔隙结构特征---以鄂尔多斯盆地延长组7段为例[J].石油学报,37(7):887-897
方国庆,樊建明,何永宏,李书恒.2012.致密砂岩油藏热水+表活剂驱提高采收率机理及其对产能贡献的定量评价[J].西安石油大学学报(自然科学版),27(6):57-60
纪淑红,田昌炳,石成方,叶继根,张祖波,傅秀娟.2012.高含水阶段重新认识水驱油效率[J].石油勘探与开发,39(3):338-345
李海波,郭和坤,杨正明,王学武.2015.鄂尔多斯盆地陕北地区三叠系长7致密油赋存空间[J].石油勘探与开发,42(3):396-400
李忠兴,屈雪峰,刘万涛,雷启鸿,孙华岭,何右安.2015.鄂尔多斯盆地长7段致密油合理开发方式探讨[J].石油勘探与开发,42(2):217-221
李百川,周巨标,丁玉盛,李祥珠,刘一丹,王梦琪.2016.不同覆压条件下储层物性变化特征及水驱油实验研究[J].山东科技大学学报(自然科学版),35(2):22-28
梁晓伟,郝炳英,杨孝,牛小兵,冯胜斌,尤源.2017.鄂尔多斯盆地致密油水平井体积压裂试验区开发特征分析[J].西北大学学报(自然科学版),47(2):259-264
屈雪峰,樊建明,王冲,赵国玺,时建超.2017.裂缝对鄂尔多斯盆地陇东地区长7致密岩心水驱渗流特征的影响[J].西安石油大学学报(自然科学版),32(5):4370-4376
任大忠,孙卫,赵继勇,屈雪峰,张茜.2015.鄂尔多斯盆地岩性油藏微观水驱油特征及影响因素---以华庆油田长81油藏为例[J].中国矿业大学学报,44(6):1043-1052
许长福,刘红现,钱根宝,覃建华.2011.克拉玛依砾岩储集层微观水驱油机理[J].石油勘探与开发,38(6):725-732
杨华,付金华,何海清,刘显阳,张忠义,邓秀芹.2012.鄂尔多斯华庆地区低渗透岩性大油区形成与分布[J].石油勘探与开发,39(6):641-648
杨涛,谢俊,周巨标,王金凯,王梦琪.2018.低孔-特低渗砂岩储层可动流体核磁共振特征及成因:以王龙庄油田T89断块阜宁组二亚段为例[J].山东科技大学学报(自然科学版),37(1):119-126
王瑞飞,陈明强.2008.特低渗透砂岩储层可动流体赋存特征及影响因素[J].石油学报,29(4):558-561,566
王瑞飞,孙卫,杨华.2010.特低渗透砂岩油藏水驱微观机理[J].兰州大学学报(自然科学版),46(6):29-33
查明,苏阳,高长海,曲江秀,王绪龙,丁修建.2017.致密储层储集空间特征及影响因素---以准噶尔盆地吉木萨尔凹陷二叠系芦草沟组为例[J].中国矿业大学学报,46(1):85-95
张永刚,陈艳,邓学峰,魏开鹏,王娟娟.2016.超低渗油藏表面活性剂降压增注及提高采收率[J].大庆石油地质与开发,35(1):126-130
赵继勇,樊建明,何永宏,杨子清,高伟,高武彬.2015.超低渗-致密油藏水平井开发注采参数优化实践---以鄂尔多斯盆地长庆油田为例[J].石油勘探与开发,42(1):68-75
Fang Guo-qing,Fan Jian-ming,He Yong-hong,Li Shu-heng.2012.Enhanced oil recovery mechanisms of“hot water+surfactant”flooding and quantitative evaluation of their contribution to the productivity of tight sandstone reservoirs[J].Journal of Xi'an Shiyou University(Natural Science Edition),27(6):57-60(in Chinese with English abstract)
Ji Shu-hong,Tian Chang-bing,Shi Cheng-fang,Yi Ji-geng,Zhang Zu-bo,Fu Xiu-juan.2012.New understanding on water-oil displacement efficiency in a high water-cut stage[J].Petroleum Exploration and Development,39(3):338-345(in Chinese with English abstract)
Li Hai-bo,Guo He-kun,Yang Zheng-ming,Wang Xue-wu.2015.Tight oil occurrence space of Triassic Chang 7 member in northern Shaanxi area,Ordos basin,NW China[J].Petroleum Exploration and Development,42(3):396-400(in Chinese with English abstract)
Li Zhong-xing,Qu Xue-feng,Liu Wan-tao,Lei Qi-hong,Sun Hua-ling,He You-an.2015.Development modes of Triassic Yanchang Formation Chang 7 member tight oil in Ordos basin,NW China[J].Petroleum Exploration and development,42(2):217-221(in Chinese with English abstract)
Li Bai-chuan,Zhou Ju-biao,Ding Yu-sheng,Li Xiang-zhu,Liu Yi-dan,Wang Meng-qi.2016.Experimental study of reservoir physical property change and water flooding under different overburden pressures[J].Journal of Shandong University of Science and Technology(Natural Science),35(2):22-28(in Chinese with English abstract)
Liang Xiao-wei,Hao Bing-ying,Yang xiao,Niu Xiao-bing,Feng Shengbin,You Yuan.2017.The characteristics of tight oil development by horizontal well with domain stimulation in the pilot test in Ordos basin[J].Journal of Northwest University(Natural Science Edition),47(2):259-264(in Chinese with English abstract)
Nasralla R A,Mahani H,Linde HAVD,Marcelis FHM,Masalmeh SK.2016.Low salinity waterflooding for a carbonate reservoir:Experimental evaluation and numerical interpretation[J].Journal of Petroleum Science&Engineering,164:640-654
Qu Xue-feng,Fan Jian-ming,Wang Chong,Zhao Guo-xi,Shi Jian-chao.2017.Impact of fractures on water flooding seepage features of Chang 7 tight cores in Longdong area,Ordos basin[J].Journal of Xi'an Shiyou University(Natural Science Edition),32(5):4370-4376(in Chinese with English abstract)
Ren Da-zhong,Sun Wei,Zhao Ji-yong,Qu Xue-feng,Zhang xi.2015.Microscopic waterflooding characteristics of lithologic reservoirs in Ordos basin and its influence factors:Taking the Chang 81reservoir in Huaqing oilfield as an example[J].Journal of China University of Mining&Technology,44(6):1043-1052(in Chinese with English abstract)
Xu Chang-fu,Liu Hong-xian,Qian Gen-bao,Qin Jian-hua.2011.Microcosmic mechanisms of water-oil displacement in conglomerate reservoirs in Karamay oilfield,NW China[J].Petroleum Exploration and Development,38(6):725-732(in Chinese with English abstract)
Yakov V,Looyestijn W J,Slijkerman W F J,Hofman J P.2001.A practical approach to obtain primary drainage capillary pressure curves from NMR core and log data[J].Petrophysics,42(4):334-343
Yang Hua,Fu Jin-hua,He Hai-qing,Liu Xian-yang,Zhang Zhong-yi,Deng Xiu-qin.2012.Formation and distribution of large low-permeability lithologic oil regions in Huaqing,Ordos basin[J].Petroleum Exploration and Development,39(6):641-648(in Chinese with English abstract)
Yang Tao,Xie Jun,Zhou Ju-biao,Wang Jin-kai,Wang Meng-qi.2018.NMR features and contributing factors of movable fluid in low porosity and ultra-low permeability sandstone reservoir:Taking the 2nd member of Funing formation in T89 Block of Wanglongzhuang oilfield as an example[J].Journal of Shandong University of Science and Technology(Natural Science),37(1):119-126(in Chinese with English abstract)
Wang Rui-fei,Chen Ming-qiang.2008.Characteristics and influencing factors of movable fluid in ultra-low permeability sandstone reservoir[J].Acta Petrolei Sinica,29(4):558-561,566(in Chinese with English abstract)
Wang Rui-fei,Sun Wei,Yang Hua.2010.Micro mechanism of water drive in ultra-low permeability sandstone reservoir[J].Journal of Lanzhou University(Natural Science),46(6):29-33(in Chinese with English abstract)
Zha Ming,Su Yang,Gao Chang-hai,Qu Jiang-xiu,Wang Xu-long,Ding Xiu-jian.2017.Tight reservoir space characteristics and controlling factors:An example from Permian Lucaogou Formation in Jimsar sag,Junggar basin,northwest China[J].Journal of China University of Mining&Technology,46(1):85-95(in Chinese with English abstract)
Zhang Yong-gang,Chen Yan,Deng Xue-feng,Wei Kai-peng,Wang Juanjuan.2016.Depressurized-augmented injection and enhanced oil recovery by the surfactant for the ultra-low-permeability oil reservoir[J].Petroleum Geology and Oilfield Development in Daqing,35(1):126-130
Zhao Ji-yong,Fan Jian-ming,He Yong-hong,Yang Zi-qing,Gao-Wei,Gao Wu-bin.2015.Optimization of horizontal well injection-production parameters for ultra-low permeable-tight oil production:A case from Changqing oilfield,Ordos basin[J].Petroleum exploration and development,42(1):68-75(in Chinese with English abstract)
代全齐,罗群,张晨,卢朝进,张云钊,鲁少杰,赵岩.2016.基于核磁共振新参数的致密油砂岩储层孔隙结构特征---以鄂尔多斯盆地延长组7段为例[J].石油学报,37(7):887-897
方国庆,樊建明,何永宏,李书恒.2012.致密砂岩油藏热水+表活剂驱提高采收率机理及其对产能贡献的定量评价[J].西安石油大学学报(自然科学版),27(6):57-60
纪淑红,田昌炳,石成方,叶继根,张祖波,傅秀娟.2012.高含水阶段重新认识水驱油效率[J].石油勘探与开发,39(3):338-345
李海波,郭和坤,杨正明,王学武.2015.鄂尔多斯盆地陕北地区三叠系长7致密油赋存空间[J].石油勘探与开发,42(3):396-400
李忠兴,屈雪峰,刘万涛,雷启鸿,孙华岭,何右安.2015.鄂尔多斯盆地长7段致密油合理开发方式探讨[J].石油勘探与开发,42(2):217-221
李百川,周巨标,丁玉盛,李祥珠,刘一丹,王梦琪.2016.不同覆压条件下储层物性变化特征及水驱油实验研究[J].山东科技大学学报(自然科学版),35(2):22-28
梁晓伟,郝炳英,杨孝,牛小兵,冯胜斌,尤源.2017.鄂尔多斯盆地致密油水平井体积压裂试验区开发特征分析[J].西北大学学报(自然科学版),47(2):259-264
屈雪峰,樊建明,王冲,赵国玺,时建超.2017.裂缝对鄂尔多斯盆地陇东地区长7致密岩心水驱渗流特征的影响[J].西安石油大学学报(自然科学版),32(5):4370-4376
任大忠,孙卫,赵继勇,屈雪峰,张茜.2015.鄂尔多斯盆地岩性油藏微观水驱油特征及影响因素---以华庆油田长81油藏为例[J].中国矿业大学学报,44(6):1043-1052
许长福,刘红现,钱根宝,覃建华.2011.克拉玛依砾岩储集层微观水驱油机理[J].石油勘探与开发,38(6):725-732
杨华,付金华,何海清,刘显阳,张忠义,邓秀芹.2012.鄂尔多斯华庆地区低渗透岩性大油区形成与分布[J].石油勘探与开发,39(6):641-648
杨涛,谢俊,周巨标,王金凯,王梦琪.2018.低孔-特低渗砂岩储层可动流体核磁共振特征及成因:以王龙庄油田T89断块阜宁组二亚段为例[J].山东科技大学学报(自然科学版),37(1):119-126
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