敖南油田敖21区块葡萄花层油水层判别技术研究
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摘要
敖南油田敖21区块在构造上位于松辽盆地北部中央坳陷区,处于大庆长垣、古龙凹陷和三肇凹陷三个二级构造带的接合部位。根据该区块试油以及完钻新井资料,区块受构造-岩性双重因素影响,油水关系比较复杂,出现了油水倒置的情况,部分物性差的储层还呈现出低阻油层的特征,给该区块的钻井运行及后期的射孔方案编制增加一定的难度。
针对该地区在开发过程中暴露出的油水关系复杂和油水层识别难度大的问题,开展敖21区块葡萄花层油水层判别技术研究并对葡萄花层的油水层进行了判别。在区域地质特征研究的前提下,首先应用储层“四性”下限标准判别各层,也可以先利用已有的录井分析资料判别各储层;然后以测井资料为基础,应用传统的交会图法,结合试油资料进行油水层判别。但是由于本区块存在低阻油层,交会图的判别精度不高,不能达到油田油水层解释要求。最后通过多参数的统计分析,采用了多组逐步判别分析的方法,建立了判别函数式对研究区葡萄花油层的油水层情况进行了判别,经回判检验准确度达到了90%以上。
依据测井、录井和试油等资料,从平面和剖面上对油水分布规律进行了研究,理清了葡萄花油层的油水分布规律,划分出了纯油区-油水区-水区的界限,得出砂体分布和断层是控制油水分布的主要因素,最后对勘探开发有利区块进行了预测。该研究将为敖21区块的有效开发提供参考。
Ao 21 block of Aonan oilfield is located in the northern part of the Songliao basin in the Central Depression Area, which is in the interface of Daqing-placanticline, Gulong depression and Sanzhao depression. According to the data of well-testing and drilling, the influence of tectonic-litholoy on the block make the oil and water relationship more complex, the oil-water inversion and oil layers with low-resistivity occurred make it difficult to the drill and perforate programming of the block for the future.
In response to the complex relationship between oil and water distribution and difficult identification of oil-water layers of Putaohua layer in Ao 21 block, oil and water layers identification technology will be studied. Based on the geological characteristics, data of four characteristics of reservoir and data of drilling log are firstly applied to define the oil and water layers, and then the traditional crossplot method is used. Because of the existence of oil layers with low resistivity, crossplot method cannot meet the requirements of oil and water layers explanation. Therefore, multigroup step discriminant analysis method is applied to establish equations to discriminate oil-water layer, and with the high accuracy of 90%.
Based on the well survey, well logging and well testing, the distribution of oil and water is atudied, the boundaries of pure oil area, oil and water area and water area are established and it is conclude that the distribution of sand bodies and faults are the main controlling factor on the oil and gas distribution. At last, the potential blocks for the next exploration and development are predicted. The paper will provide significant references to the efficient development on Ao 21 block.
针对该地区在开发过程中暴露出的油水关系复杂和油水层识别难度大的问题,开展敖21区块葡萄花层油水层判别技术研究并对葡萄花层的油水层进行了判别。在区域地质特征研究的前提下,首先应用储层“四性”下限标准判别各层,也可以先利用已有的录井分析资料判别各储层;然后以测井资料为基础,应用传统的交会图法,结合试油资料进行油水层判别。但是由于本区块存在低阻油层,交会图的判别精度不高,不能达到油田油水层解释要求。最后通过多参数的统计分析,采用了多组逐步判别分析的方法,建立了判别函数式对研究区葡萄花油层的油水层情况进行了判别,经回判检验准确度达到了90%以上。
依据测井、录井和试油等资料,从平面和剖面上对油水分布规律进行了研究,理清了葡萄花油层的油水分布规律,划分出了纯油区-油水区-水区的界限,得出砂体分布和断层是控制油水分布的主要因素,最后对勘探开发有利区块进行了预测。该研究将为敖21区块的有效开发提供参考。
Ao 21 block of Aonan oilfield is located in the northern part of the Songliao basin in the Central Depression Area, which is in the interface of Daqing-placanticline, Gulong depression and Sanzhao depression. According to the data of well-testing and drilling, the influence of tectonic-litholoy on the block make the oil and water relationship more complex, the oil-water inversion and oil layers with low-resistivity occurred make it difficult to the drill and perforate programming of the block for the future.
In response to the complex relationship between oil and water distribution and difficult identification of oil-water layers of Putaohua layer in Ao 21 block, oil and water layers identification technology will be studied. Based on the geological characteristics, data of four characteristics of reservoir and data of drilling log are firstly applied to define the oil and water layers, and then the traditional crossplot method is used. Because of the existence of oil layers with low resistivity, crossplot method cannot meet the requirements of oil and water layers explanation. Therefore, multigroup step discriminant analysis method is applied to establish equations to discriminate oil-water layer, and with the high accuracy of 90%.
Based on the well survey, well logging and well testing, the distribution of oil and water is atudied, the boundaries of pure oil area, oil and water area and water area are established and it is conclude that the distribution of sand bodies and faults are the main controlling factor on the oil and gas distribution. At last, the potential blocks for the next exploration and development are predicted. The paper will provide significant references to the efficient development on Ao 21 block.
引文
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[26]谢丽,徐子远,杨洪民,等.测井交会图识别技术在涩北气田的应用[J].青海石油,2005,23(2):l~4.
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[31]周红涛,高楚桥.塔河油田碳酸盐岩储层类型划分[J].石油物探,2005,44(1):37~38.
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[33]陈习峰.岩石孔隙流体交会技术最新进展[J].勘探地球物理进展,2004,27(6):397~401.
[34]韩济全.用孔隙度与含水饱和度交会图识别储层流体性质[J].勘探地球物理进展,2005,25(4):294~296.
[35]李香玲,李国强,李泰武,等.王窑西南油层分布规律及测井响应特征[J].内蒙古石油化工,2009,2:132~133.
[36]段新国,王允诚,李忠权,等.应用多组逐步判别分析优选油气层[J].大庆石油地质与开发,2007,27(1):68~71.
[37]夏克文,朱军,宋子齐.模糊相似比方法及其在油气识别中的应用[J].测井技术,1994,18(6):397~401.
[38]贺仲雄.模糊数学及其应用[M].天津:天津科技出版社,1983:12~57.
[39]申辉林,王敏.应用模糊识别方法判别油水层[J].勘探地球物理进展,2007,30(2):140~143.
[40]欧阳健.石油测井解释与储层描述[M].东营:石油大学出版社,1994:80~110.
[41]赵为永,陈宏民,李松东,等.乌南油田N21油藏储层“四性”关系研究[J].断块油气田,2008,15(4):56~59.
[42]郎东升,岳兴举.油气水层定量评价录井新技术[M].北京:石油工业出版社,2004:52~99.
[43]中国石油勘探与生产公司.低阻油气藏测井识别评价方法与技术[M].北京:石油工业出版社,2006,21(2):8~10.
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[2] Guan Y.C. Impact of dynamic mud invasion on Sw estimation in fresh water formations. Sudan Blocks l/2/4[J]. Muglad Basin: The Log Analyst, 2001, 40(3): 205~221.
[3] Maxman W.H, Smits L.J.M. Electrieal conductivities in oil beraing sands[J]. SPE, 1968: 26~51.
[4] Clavier C, Coates G, Dumanoir J. Theoretical and Experimental Basis for the Dual-water Model for Interpretation of shaly sands[J]. SPE, 1977: 68~59.
[5] Jamison W.R. Geometrical analysis of fold development in over thrust terranes[J]. Joumal of Structural Geology 1987, 9(2): 207~219.
[6] Givens W.W. A conductive rock matrix model(CRMM) for the analysis of low-contrast resistivity formations[J]. The Log Analyst, 1987, 28(2): 138~151.
[7] Givens W.W, Sehmidt E.J. A generic electrical conduction model for low-contrast resistivity sandstones[J]. SPWLA 29th Annual Logging SymPosium.Texas, 1988: l~25.
[8]李浩,刘双莲,吴伯福,等.低电阻率油层研究的3个尺度及其意义[J].石油勘探与开发,2005,32(2):123~125.
[9]乔文孝,阎树汶.用声波测井资料识别油气水层[J].测井技术,1997,21(3):215~220.
[10]施尚明,孙小洁,韩殿杰.油、气、水层综合识别的概率法及其应用[J].大庆石油地质与开发,1999,18(3):13~15.
[11]龙翔,单献国,张云献.地球化学法对油、气、水层的判别[J].断块油气田,1999,6(3):8~10.
[12]徐广田,赵秀英.高泥、高钙、薄储层油层识别技术及应用[J].大庆石油地质与开发,2000,19(2):13~14.
[13]李艳丽,楚泽涵,岳兴举.葡西地区葡萄花油层定量识别与评价方法[J].测井技术,26(5):379~382.
[14]胡佑华,李康悌,徐萍.声电法识别油气水层[J].特种油气藏,2005,12(2):39~41.
[15]吴疆.应用两总体判别分析法对试油层位进行优选[J].新疆地质,2005,23(1):86~88.
[16]邴尧忠,朱兆信,慈兴华,等.综合录井技术在油气田勘探中的应用[J].油气地质与采收率,2003,10(2):32~33.
[17]孙建孟,王永刚.地球物理资料综合应用[M].东营:石油大学出版社,2001:230~240.
[18]苏国英.地化气测录井资料在油水层识别中的应用[J].测井技术,2006,30(6):551~553.
[19]胡红,李强,樊红乔.录井神经网络油气层解释模型研究[J].油气地质与采收率,2003,10(2):36~37.
[20]张杰,赵玉华.鄂尔多斯盆地三叠系延长组地震层序地层研究[J].岩性油气藏,2007,19(4):71~74.
[21]谭廷栋.测井解释发现油气层[J].天然气工业,2000,20(6):47~50.
[22]宋子齐.测井多参数及其灰色理论处理方法在埕岛油田的应用[J].石油物探,1994,33(4):93~105.
[23]田方,杨永发,麻平社,等.逐步判别分析法在鄂尔多斯盆地油田的应用[J].国外测井技术,2005,20(1):40~43.
[24]王永春,黄志龙,刘宝柱.松辽盆地南部尤其系统特征[J].石油勘探与开发,2001,28(6):16~19.
[25]张野,郎东升,耿长喜,等.大庆探区复杂油气水层录井综合识别与评价新技术[J].中国石油勘探,2004,4:44~48.
[26]谢丽,徐子远,杨洪民,等.测井交会图识别技术在涩北气田的应用[J].青海石油,2005,23(2):l~4.
[27] John P.C, Herbert W.S. PrinciPles of AVO crossplotting[J]. The Leading Eage, 1997, 26(4): 337~344.
[28]张永刚.油气地球物理新进展[M].北京:石油工业出版社,2003:9~28.
[29]杨建礼,郝以岭,郑浚茂.东濮凹陷W405井含气砂岩弹性参数特征分析[J].石油物探,2006,45(6):619~623.
[30]陈宝书,杨午阳,刘全新,等.地震属性组合分析方法及其应用[J].石油物探,2006,45(2):173~176.
[31]周红涛,高楚桥.塔河油田碳酸盐岩储层类型划分[J].石油物探,2005,44(1):37~38.
[32]张松扬,范宜仁,程相志,等.塔中地区奥陶系碳酸盐岩储层测井评价研究[J].石油物探,2006,45(6):630~637.
[33]陈习峰.岩石孔隙流体交会技术最新进展[J].勘探地球物理进展,2004,27(6):397~401.
[34]韩济全.用孔隙度与含水饱和度交会图识别储层流体性质[J].勘探地球物理进展,2005,25(4):294~296.
[35]李香玲,李国强,李泰武,等.王窑西南油层分布规律及测井响应特征[J].内蒙古石油化工,2009,2:132~133.
[36]段新国,王允诚,李忠权,等.应用多组逐步判别分析优选油气层[J].大庆石油地质与开发,2007,27(1):68~71.
[37]夏克文,朱军,宋子齐.模糊相似比方法及其在油气识别中的应用[J].测井技术,1994,18(6):397~401.
[38]贺仲雄.模糊数学及其应用[M].天津:天津科技出版社,1983:12~57.
[39]申辉林,王敏.应用模糊识别方法判别油水层[J].勘探地球物理进展,2007,30(2):140~143.
[40]欧阳健.石油测井解释与储层描述[M].东营:石油大学出版社,1994:80~110.
[41]赵为永,陈宏民,李松东,等.乌南油田N21油藏储层“四性”关系研究[J].断块油气田,2008,15(4):56~59.
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