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吴起长8储层粘土矿物及敏感性实验研究
引用本文:刘广峰,潘少杰,樊建明,王文举,白耀星.吴起长8储层粘土矿物及敏感性实验研究[J].河北工程大学学报,2016,33(4):83-88.
作者姓名:刘广峰  潘少杰  樊建明  王文举  白耀星
作者单位:中国石油大学(北京) 石油工程教育部重点实验室, 北京 昌平 102249;中国石油大学(北京) 石油工程教育部重点实验室, 北京 昌平 102249;中国石油天然气股份有限公司 长庆油田分公司, 陕西 西安 710021;中国石油大学(北京) 石油工程教育部重点实验室, 北京 昌平 102249;中国石油大学(北京) 石油工程教育部重点实验室, 北京 昌平 102249
基金项目:国家自然科学基金资助项目(51404282);中国石油科技创新基金资助项目(2014D-5006-0215);中国石油大学(北京)科研基金资助项目(2462015YQ0217)
摘    要:运用实验方法评价鄂尔多斯盆地中部吴起地区长8超低渗透砂岩储层的粘土矿物组成及对应的潜在储层伤害机理。采用铸体薄片、扫描电镜、X射线衍射等岩心分析技术,掌握了粘土的成分、含量等特征;通过25块岩心的流动评价实验,评价5口油井的储层敏感性特征;运用相关性评价方法,分析粘土矿物对储层物性和敏感性的影响。研究结果表明,吴起长8储层存在的4种主要粘土矿物中,伊/蒙混层含量最高,平均为47%;高岭石、伊利石和绿泥石其次,平均含量分别为24.6%、14.6%和13.8%;粘土矿物的类型、含量和产状对储层物性有重要影响,储层物性与绿泥石含量呈正相关,与伊利石、伊/蒙混层含量呈负相关;由于每种粘土的形态、性质、含量的差异,造成吴起长8储层的弱-中等偏弱速敏、中等偏强-强水敏、强-极强盐敏、弱-中等偏弱酸敏、弱-中等偏弱碱敏的趋势。

关 键 词:扫描电镜  X射线衍射  粘土矿物  岩心流动实验  储层敏感性
收稿时间:2016/7/20 0:00:00

Experimental study on clay mineral and reservoir sensitivity of Chang 8 ultra-low permeability formation in Wuqi Area
Authors:LIU Guangfeng  PAN Shaojie  FAN Jianming  WANG Wenju and BAI Yaoxing
Affiliation:CMOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;CMOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;Changqing Oil field Company, Petro China, Shanxi Xi''an 710021, China;CMOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;CMOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
Abstract:Experimental study was carried out to quantify clay mineral and corresponding reservoir sensitivity of Chang 8 ultra-low permeability formation in Wuqi Area, Ordos basin. Thin sections were prepared out of core samples, while corresponding analyses were respectively performed by using the scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The composition and relative contents of clay minerals were identified. Subsequently, core samples flow experiments by injecting different synthetic brine were performed to evaluate reservoir sensitivity. The content of existing four main clay minerals, i.e. illite-montmorillonite mixed-layer, kaolinite, illite and chlorite, is 47%, 25%, 15%, 14% respectively. The physical property of reservoir is positive correlation with the content of chlorite, but is negative correlation with the content of illite and illite-montmorillonite mixed-layer. The differences of the morphology, properties and content of clay mineral cause the weak-medium weak velocity sensitivity, medium strong-strong water sensitivity, strong-extremely strong salt sensitivity, weak-medium weak acid sensitivity and weak-medium weak alkali sensitivity.
Keywords:scanning electron microscope  X-ray diffraction  clay mineral  flow experiment  reservoir sensitivity
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