海拉尔盆地贝西斜坡北部地区储层特征及影响因素分析
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TE122.2;P618.130.2+1

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大庆油田有限责任公司资助项目“海拉尔盆地贝斜坡北部地区南屯组油气成藏条件呀研究”


Characteristics of reservoirs in northern Beixixiepo area of Hailar Basin and their influencing factors
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    摘要:

    通过测井曲线的标准化处理及信息提取、岩心及录井岩屑观察、铸体薄片、物性分析、扫描电镜、压汞分析等技术手段,研究了海拉尔盆地贝西斜坡北部地区南屯组储层的主要岩性特征、物性特征、储集空间类型和影响因素.研究结果表明.海拉尔盆地南屯组以内陆湖相碎屑岩为主,主要包括角砾岩、砾岩、砂砾岩、粗砂岩、细砂岩、粉砂岩、泥质砂岩及泥岩等.南一段储层孔隙度平均值为6.15%,渗透率平均值为0.31 × 10-3μm2,为低孔特低渗型孔隙特征;南二段储层孔隙度平均值为12.18%,渗透率平均值为2.79× 10-3μm2,属于中孔低渗型孔隙特征.储集空间类型以粒间孔隙为主,发育一定的次生孔隙.喉道分为4种类型(Ⅰ类、Ⅱ类、Ⅲ类、Ⅳ类).扇三角洲前缘分支水道砂体、扇三角洲平原辫状河道砂体和滨浅湖砂坝微相砂体为该区有利的储层砂体类型.储层性质主要受沉积相和成岩作用影响.

    Abstract:

    Main lithologic characteristics, reservoir space and influence factors of Nantun Formation reservoirs in northern Beixixiepo area of Hailar Basin were studied by such means as standardized processing of logging curves and information extraction, observation of rock cores and well log debris, electronic scanning and thin section analysis as well as mercury penetration analysis. The results indicate that Nantun Formation in Hailar Basin is mainly composed of inland lake facies clastic rocks, comprising chiefly breccia, glutenite, conglomerate, grit, fine sandstone,iltstone, argillaceous sandstone and mudstone. The averageporosity of the Nan-1st section reservoir is 6.15%, and the average permeability is 0.31×10-3μm2,uggesting that the reservoir is characterized by low porosity and extremely low porepermeability. The average porosity of Nan-2nd section reservoir is 12.18%, and the average permeability is 2.79×10-3μm2, implying that the reservoir is of mesoporosity and low pore permeability. The reservoir spatial type is of typical intergranular space, with the development of some induced pores. The throat is divided into four types(Ⅰ,Ⅱ,Ⅲ;Ⅳ). Favorable reservoir sand body types seem to be the fan delta front branch channel sand body, the fan delta plain braided channel sand body and the shore shallow lake sand dam microfacies sand body. The properties of the reservoir are mainly affected by sedimentary facies and diagenesis.

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李占东,周件林,文华,孙娜,2008,海拉尔盆地贝西斜坡北部地区储层特征及影响因素分析[J].岩石矿物学杂志,27(1):45~51.

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  • 收稿日期:2007-05-09
  • 最后修改日期:2007-06-18
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