超稠油油藏油水倒置成因及含油面积圈定探析——以埕东油田埕911-平1块馆下段为例
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摘要
埕东油田埕911-平1块馆下段超稠油油藏高部位产水或高含水、低部位产油的"高水低油"生产特征明显,存在油水倒置现象,但其成因尚不明确。基于测井、录井、实验及开发动态等资料,深入分析了该油藏油水倒置的特征及成因。该区块地面原油密度为1.007 6~1.024 8 g/cm~3,大于地层水密度,在重力的作用下,原油克服浮力和毛管压力向构造低部位发生二次运移,是造成油水倒置的主要原因,利用录井和测井等资料进一步证实了该观点。油水倒置油藏的油水分布规律与常规油藏差别较大,用于圈定常规油藏含油面积的一些原则与方法对油水倒置油藏不适用。以探明含油面积圈定为例,针对超稠油油藏复杂的油水分布关系,提出了其含油面积圈定的原则与应注意的问题。
The reservoir that produces water at high structure and oil at low structure maybe present phenomenon of oil/water inversion in super-heavy oil reservoir in the lower member of Guantao Formation of Block Cheng911-Ping1,Chengdong Oilfield. Its reason is not clear yet. Based on the well logging,experiment and dynamic data of development,the characteristics of oil/water inversion and its genesis were analyzed comprehensively. The ground crude oil density ranges from 1.007 6to 1.024 8 g/cm~3,which is higher than the formation water density in this area. The heavy oil migrates to the lower structure against the buoyancy and capillary force under the action of gravity,and it is the main reason of the oil/water inversion. This viewpoint was confirmed by mud logging and well logging data. The oil/water distribution law in reservoirs featured by oil/water inversion is very different from that in the conventional oil reservoir. Some principles and methods for delineation of the oil-bearing area in the conventional oil reservoir are not applicable to reservoirs featured by oil/water inversion. Taking proven oil-bearing area as an example,the corresponding delineated principle and the key points in delineation of oil-bearing area in the super-heavy oil reservoirs were proposed aiming at the complex oil-water distribution.
The reservoir that produces water at high structure and oil at low structure maybe present phenomenon of oil/water inversion in super-heavy oil reservoir in the lower member of Guantao Formation of Block Cheng911-Ping1,Chengdong Oilfield. Its reason is not clear yet. Based on the well logging,experiment and dynamic data of development,the characteristics of oil/water inversion and its genesis were analyzed comprehensively. The ground crude oil density ranges from 1.007 6to 1.024 8 g/cm~3,which is higher than the formation water density in this area. The heavy oil migrates to the lower structure against the buoyancy and capillary force under the action of gravity,and it is the main reason of the oil/water inversion. This viewpoint was confirmed by mud logging and well logging data. The oil/water distribution law in reservoirs featured by oil/water inversion is very different from that in the conventional oil reservoir. Some principles and methods for delineation of the oil-bearing area in the conventional oil reservoir are not applicable to reservoirs featured by oil/water inversion. Taking proven oil-bearing area as an example,the corresponding delineated principle and the key points in delineation of oil-bearing area in the super-heavy oil reservoirs were proposed aiming at the complex oil-water distribution.
引文
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[2]张小莉,查明,王鹏.单砂体高部位油水倒置分布的成因机制[J].沉积学报,2006,24(1):148-151.Zhang Xiaoli,Zha Ming,Wang Peng.Oil/water inversion and its genetic mechanism in the higher portions of the single sandstone body[J].Acta Sedimentologica Sinica,2006,24(1):148-151.
[3]余成林,林承焰,王正允.准噶尔盆地夏9井区八道湾组油水倒置型油藏特征及成因[J].石油天然气学报,2008,30(5):32-36.Yu Chenglin,Lin Chengyan,Wang Zhengyun.Oil-water inversion and its genetic mechanism of Badaowan reservoir in Well Block Xia9 of Junggar Basin[J].Journal of Oil and Gas Technology,2008,30(5):32-36.
[4]胡望水,李宗贤,黄玉欣,等.南襄盆地泌阳凹陷赵凹安棚油田深盆油(气)藏[J].地质学报,2007,81(4):531-538.Hu Wangshui,Li Zongxian,Huang Yuxin,et al.Deep-basin oil pool of the Zhaowa-Anpeng Field in the Biyang Depression of the Nanxiang Basin[J].Acta Geologica Sinica,2007,81(4):531-538.
[5]侯启军,魏兆胜,赵占银,等.松辽盆地的深盆油藏[J].石油勘探与开发,2006,33(4):406-411.Hou Qijun,Wei Zhaosheng,Zhao Zhanyin,et al.Deep basin reservoir in Songliao Basin[J].Petroleum Exploration and Development,2006,33(4):406-411.
[6]杨帆,于兴河,李胜利,等.低孔低渗构造岩性油藏油水倒置成因研究[J].中国矿业大学学报,2010,39(5):747-752.Yang Fan,Yu Xinghe,Li Shengli,et al.Oil/water inversion and its genetic mechanism in the structural-lithologic reservoir of lowporosity and low permeability[J].Journal of China University of Mining&Technology,2010,39(5):747-752.
[7]严科,任怀强.稠油油藏油水倒置现象探讨——以孤岛油田中一区馆陶组6—7砂层组为例[J].石油勘探与开发,2009,36(5):635-640.Yan Ke,Ren Huaiqiang.Oil/water inversion and juxtaposition in heavy oil reservoirs:Taking 6-7 sand members of Guantao Formation,Gudao Oilfield as an example[J].Petroleum Exploration and Development,2009,36(5):635-640.
[8]曲方春,王鸿军,佟斯琴,等.古龙南凹陷葡萄花油层储层微观孔隙结构特征与油水分布关系[J].大庆石油地质与开发,2016,35(5):1-6.Qu Fangchun,Wang Hongjun,Tong Siqin,et al.Relationships between the microscopic pore structural characteristics and oil-water distribution for Putaohua oil reservoirs in South Gulong Sag[J].Petroleum Geology&Oilfield Development in Daqing,2016,35(5):1-6.
[9]吕鸣岗,程永才,袁自学,等.DZ/T 0217—2005石油天然气储量计算规范[S].北京:中国标准出版社,2005.LüMinggang,Cheng Yongcai,Yuan Zixue,et al.DZ/T 0217-2005 Regulation of petroleum reserves estimation[S].Beijing:China Standard Press,2005.
[10]黄文英,杨红敏,樊庆华,等.埕东油田埕911-平1块N1g210埕91块E3d2埕913-斜31块E3s2E3s3新增石油探明储量报告[R].东营:中国石化胜利油田分公司,2011.Huang Wenying,Yang Hongmin,Fan Qinghua,et al.Report of new found proven reserves in in N1g210 of Block Cheng911-Ping1,E3d2of Block Cheng91 and E3s2E3s3of Cheng913-xie31 in Chengdong Oilfield[R].Dongying:Shengli Oilfield Company,SINOPEC,2011.
[11]Vazquez M E,Beggs H D.Correlations for fluid physical property prediction[J].Journal of Petroleum Technology,1980,32(6):968-970.
[12]Schowalter T T.Mechanics of secondary hydrocarbon migration and entrapment[J].The American Association of Petroleum Geologists Bulletin,1979,60(5):23-760.
[13]张善文.济阳坳陷深层稠油成因机理、储层评价与成藏规律[D].广州:中国科学院广州地球化学研究所,2002:4-6.Zhang Shanwen.Formation mechanism,reservoir evaluation and accumulation of deep viscous oil[D].Guangzhou:Guangzhou Institute of Ceochemistry,Chinese Academy of Sciences,2002:4-6.
[14]林军章,冯云,谭晓明,等.生物成因稠油与伴生气形成过程模拟研究——以林樊家地区浅层气和稠油为例[J].油气地质与采收率,2017,24(2):85-89.Lin Junzhang,Feng Yun,Tan Xiaoming,et al.A simulation experiment of formation of biodegraded heavy oil and associated gas:A case of shallow gas and heavy oil in Linfanjia area[J].Petroleum Geology and Recovery Efficiency,2017,24(2):85-89.
[15]牛子铖,柳广弟,曹喆,等.银额盆地查干凹陷油藏特征及油气成藏过程[J].石油实验地质,2016,38(1):32-39.Niu Zicheng,Liu Guangdi,Cao Zhe,et al.Reservoir characteristics and hydrocarbon accumulation in Chagan Sag,Yingen-Ejinaqi Basin[J].Petroleum Geology&Experiment,2016,38(1):32-39.
[16]陈建平,王兴谋,高长海,等.东营凹陷林樊家地区稠油特征及成因机制[J].特种油气藏,2016,23(5):8-11.Chen Jianping,Wang Xingmou,Gao Changhai,et al.Heavy-oil properties and genetic mechanisms in Linfanjia of Dongying Depression[J].Special Oil&Gas Reservoirs,2016,23(5):8-11.
[17]吴丽,陈民锋,乔聪颖,等.稠油油藏过渡带油水分布规律及布井界限[J].油气地质与采收率,2016,23(3):77-82.Wu Li,Chen Minfeng,Qiao Congying,et al.Water and oil distribution law and limits for well pattern in the oil-water transition zone of heavy oil reservoir[J].Petroleum Geology and Recovery Efficiency,2016,23(3):77-82.