鄂尔多斯盆地T油区长4+5^(2)储层非均质性研究  

Heterogeneity of Chang 4+5^(2) Reservoir in T Oil Area,Ordos Basin

作　　者：甄延明 武富礼[1] 袁珍[1] ZHEN Yan-ming;WU Fu-li;YUAN Zhen(Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]西安石油大学陕西省油气成藏地质学重点实验室,陕西西安710065

出　　处：《河北地质大学学报》2021年第6期52-59,共8页Journal of Hebei Geo University

基　　金：国家科技重大专项(2017ZX05005-002-004)。

摘　　要：通过对鄂尔多斯盆地T油区内的40组样品的孔渗资料、测井资料、铸体薄片、压汞实验分析,从宏观和微观的角度对靖边地区T油区长4+5^(2-1)和长4+5^(2-2)的储层非均质性特征进行对比研究。区内渗透率垂向韵律为反韵律和复合韵律,其层内非均质性主要受到不同类型夹层的不规则分布的影响,层间非均质性受控于层间隔层分布,平面非均质性则与砂体形态和叠置关系密切,这三方面整体表现为长4+5^(2-1)比长4+5^(2-2)的储层非均质性弱。本区长4+5^(2)储层岩性主要为深灰色长石砂岩,发育粒间孔和溶蚀孔;主要喉道类型为弯片状和片状,少见缩颈型喉道,且喉道分布极不均一,长4+5^(2)的非均质性整体较强。In this paper,the heterogeneity characteristics of Chang 4+5^(2-1)and Chang 4+5^(2-2)reservoirs in The T oil block of Jingbian area were studied from the macroscopic and microscopic perspectives by means of the pore and permeability data,logging data,casting thin sections and mercury injection experiment analysis of 40 groups of samples in the T oil block of Ordos Basin.Reverse rhythm and vertical permeability rhythm in the compound rhythm,its intraformational heterogeneity is mainly affected by the irregular distribution of different types of interlining,interlayer heterogeneity is controlled by layer spacing distribution,plane heterogeneity is closely associated with sand body morphology and superimposed,the three aspects of the overall performance for longer Chang 4+5^(2-1)thanChang4+5^(2-2)reservoir heterogeneity is weak.The lithology of Chang 4+5^(2) reservoir in this area is mainly dark gray arkose sandstone with intergranular pores and dissolution pores.The main types of throat were curved and flaky,and neck-constricted throat was rare.The distribution of throat was very uneven,and the heterogeneity of length 4+5^(2) was strong heterogeneity.

关 键 词：储层非均质性 长4+5^(2) T油区 鄂尔多斯盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]