| 闵桥油田阜三段低阻油层成因分析与识别 |
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| 引用本文： | 叶兴树,王伟锋.闵桥油田阜三段低阻油层成因分析与识别[J].矿物岩石,2007,27(1):117-120. |
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| 作者姓名： | 叶兴树 王伟锋 |
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| 作者单位： | 中国石油大学地球资源与信息学院,山东,东营,257061 |
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| 摘 要： | 闵桥油田阜三段油层电阻率较低,为低阻油层,在测井曲线上的响应特征与正常油层有明显的差别,通过对闵桥油田地质、粒度分析、压汞、粘土矿物分析等资料综合研究其低电阻率油层的成因。结果表明,引起低电阻率油层的原因是闵桥油田阜三段以粉砂岩、细砂岩为主,泥质含量较高,较高含量的泥质充填了颗粒的孔隙空间,由于粘土矿物的存在,使油层的粒间孔隙受到改造,引起孔隙直径变小且导致微孔隙发育,加之蒙脱石强烈的吸水能力,大量水被吸附于颗粒及粘土表面,同时由于较疏松的高岭石的迁移而堵塞孔喉了以孔喉为主的孔隙,使部分自由水成为束缚水,造成油层的束缚水含量较高,降低了油层电阻率;同时粘土矿物的附加导电作用也降低了油层电阻率;相对含量较高的导电矿物的存在是造成局部油层电阻率偏低的原因。利用声波时差和深感应电阻率交汇图可以对闵桥油田阜三段低阻油层进行有效的识别。
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| 关 键 词： | 低电阻油层 泥质含量 束缚水 粘土矿物 |
| 文章编号： | 1001-6872（2007）01-0117-04 |
| 修稿时间： | 2006-11-07 |
GENESIS AND RECOGNITION OF LOW RESISTIVITY FORMATION OF THE FUSAN MEMBER IN MINQIAO OIL FIELD |
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| YE Xing-shu,WANG Wei-feng.GENESIS AND RECOGNITION OF LOW RESISTIVITY FORMATION OF THE FUSAN MEMBER IN MINQIAO OIL FIELD[J].Journal of Mineralogy and Petrology,2007,27(1):117-120. |
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| Authors: | YE Xing-shu WANG Wei-feng |
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| Institution: | Faculty of Geo-Resource and Information, China University of Petroleum ,Dongying 257061,China |
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| Abstract: | The resistivity of oil reservoirs in Member 3 of Funing Formation of Minqiao is lower,they have obviously different response feature in logging curve from normal oil reservoir.An integrated study on its cause through such information as geological,size-fraction analysis,mercury,clay mineral analysis indicates that the rocks in Member 3 of Funing Formation are mainly siltstone,fine sandstoneand and these rocks have higher content of clay which fills the pore of grain.The pore type which is mainly primary pore-throat makes free water incapable of free flow in the finer pore-throat and generates irreducible water.On account of clay mineral,the intergranular pore of oil formation is rebuilt,leading to the decrease of pore diameter and the development of ting pore.Because of the absorption ability of Montmorillonite,a great deal water is absorbed at grain or clay surface.Meanwhile the migration of loose kaolinite jammed those pores which are mainly made up of primary pore-throat,makes part of free water become irreducible water causing high content of irreducible water in the oil formation.Moreover,clay mineral has additional conductivity,which make the resistivity of oil reservoirs decrease.The presence of relatively upper content electrical mineral is the cause which makes the low resistivity of the part of oil formation.The lower resistivity of oil reservoirs can be effectively recongnized by cross plot of acoustic logs and deep-induction resistivity in Minqiao oil field. |
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| Keywords: | low resistivity oil reservoirs clay content irreducible water clay mineral |
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