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Characteristics of Chang 2~1 Low PermeabilitySandstone Reservoir in Shunning Oil Field 被引量:1
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作者 WANG Jian-min YU Liu-ying 《Journal of China University of Mining and Technology》 EI 2006年第2期223-227,共5页
Characteristics of Chang 21 low permeability sandstone reservoir of Shunning oil field are analyzed and evaluated based on the data of well logging and experiment. The result shows that 1) the Chang 21 low permeabilit... Characteristics of Chang 21 low permeability sandstone reservoir of Shunning oil field are analyzed and evaluated based on the data of well logging and experiment. The result shows that 1) the Chang 21 low permeability reservoir belongs to the classification of middle-to-fine sized feldspar sandstone, with its components being low in ma- turity, deposited in distributary rivers in the front of the delta; 2) the reservoir is obviously dominated by a low or a very low permeability with a linear variation tendency different from that of the ultra-low permeability reservoir; 3) the spa- tial variation in lithology and physical properties of the reservoir are controlled by the sedimentary facies zones, and 4) the physical property of the reservoir is significantly influenced by clastic constituents and their structure, and the con- stituent of cement materials and their content. The result also shows that the diagenesis action of the reservoir is quite strong in which dissolution greatly modified the reservoir In addition, the inter-granular dissolved pores are the mainly developed ones and the micro-structure is dominated by the combination of middle-to-large sized pores with fine-to-coarse throats. Finally, the radius of the throats is in good exponential correlation with permeability and the seepage capacity comes from those large sized throats. 展开更多
关键词 chang 2^1 reservoir low permeability: reservoir characteristic EVALUATION
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鄂尔多斯盆地郑寺区块长2_(1)储层非均质性研究
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作者 李杰 马钰凯 +2 位作者 宁波 肖鄂 雷倩倩 《云南化工》 CAS 2023年第12期123-127,共5页
针对郑寺区块长2_(1)储层非均质性认识不清,依据储层物性测试分析结果及测井数据,对研究区的层内、层间和平面非均质性进行了精细研究。研究认为,层内非均质性在砂体韵律、渗透率非均质参数及夹层分布方面表现为强非均质性,长2_(1)1小... 针对郑寺区块长2_(1)储层非均质性认识不清,依据储层物性测试分析结果及测井数据,对研究区的层内、层间和平面非均质性进行了精细研究。研究认为,层内非均质性在砂体韵律、渗透率非均质参数及夹层分布方面表现为强非均质性,长2_(1)1小层非均质性最强,其次为长2^(3)_(1)和长2^(2)_(1)小层;层间方面,从砂岩密度和隔层分布,长2^(3)_(1)小层的层间非均质性最强;平面上,长2_(1)储层砂体的连通性较好,但横向变化较大,非均质性较强。总的来说,长2_(1)储层各个维度都表现出强非均质性,其中长2_(1)1小层非均质性最强,其次为长2^(3)_(1)和长2^(2)_(1)小层。明确研究区长2_(1)储层非均质性,有助于认识长2_(1)油层亚组油、水空间的展布规律,可以为油田高效开发及剩余油挖潜提供理论依据。 展开更多
关键词 鄂尔多斯盆地 郑寺区块 2_(1)储层 储层非均质性
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陕北顺宁油田长2^1低渗透砂岩储层综合分类评价 被引量:16
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作者 王建民 《矿物岩石》 CAS CSCD 北大核心 2006年第4期89-94,共6页
根据实验分析,结合录井、试采等成果,对顺宁油田长21低渗透砂岩储层特征等进行分析研究和综合评价,认为:长21储层孔渗分布特征属于以中孔特低渗-低渗型为主的储层,微观结构以中-大孔隙、细到中-粗喉道组合为主,孔喉结构特征对储层渗透... 根据实验分析,结合录井、试采等成果,对顺宁油田长21低渗透砂岩储层特征等进行分析研究和综合评价,认为:长21储层孔渗分布特征属于以中孔特低渗-低渗型为主的储层,微观结构以中-大孔隙、细到中-粗喉道组合为主,孔喉结构特征对储层渗透性有决定性影响,储层渗流能力主要由较大的孔喉提供;长21储层可以划分为Ⅰ,Ⅱ,Ⅲ,Ⅳ4大类型及相应的A,B亚类;综合评价长21储层属于以Ⅰ,Ⅱ两种类型为主要构成的低渗-特低渗透储层,其中A亚类储层的孔喉结构优于B亚类,渗流能力也将好于B亚类,然而分流河道及其旋回沉积的不同部位控制了储层类型的发育状况。 展开更多
关键词 2^1储层 低渗透 综合分类评价
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