ISSN 1673-8217 CN 41-1388/TE
主管:中国石油化工集团有限公司 主办:中国石油化工股份有限公司河南油田分公司
葛宏选, 郭粉转, 丁磊, 龚娟. 2013: 吴起油田吴仓堡西部长10储层特征及综合评价. 石油地质与工程, 27(04): 24-26+146.
引用本文: 葛宏选, 郭粉转, 丁磊, 龚娟. 2013: 吴起油田吴仓堡西部长10储层特征及综合评价. 石油地质与工程, 27(04): 24-26+146.
2013: Characteristics and comprehensive evaluation of Chang 10 reservoir in the west of Wucangbu of Wuqi oilfield. Petroleum Geology and Engineering, 27(04): 24-26+146.
Citation: 2013: Characteristics and comprehensive evaluation of Chang 10 reservoir in the west of Wucangbu of Wuqi oilfield. Petroleum Geology and Engineering, 27(04): 24-26+146.

吴起油田吴仓堡西部长10储层特征及综合评价

Characteristics and comprehensive evaluation of Chang 10 reservoir in the west of Wucangbu of Wuqi oilfield

  • 摘要: 通过岩心观察,利用铸体薄片、扫描电镜、图像分析、压汞资料分析、数理统计等方法,对吴起油田吴仓堡西部延长组长10储层特征进行了研究,研究结果表明:研究区油藏砂岩成分和岩石结构成熟度低,岩屑成分主要以喷发岩和隐晶岩为主,杂基由绿泥石、伊利石、泥铁质等组成,胶结物成分主要有方解石、白云石及石英质;该区储层属特低孔、特低渗储层,储层孔隙类型主要是粒间孔和长石溶孔为主,裂隙孔次之;储层物性主要受沉积微相展布规律和成岩作用控制,局部发育的微观裂缝对改善储层物性有一定作用,在平面上,水下分流河道砂体物性最好,纵向上受成岩作用控制,压实和胶结作用使储层物性明显变差,溶蚀作用产生的次生孔隙改善储层物性,形成有效储层;该区储层主要为中等偏差储层(Ⅳ类)为主。

     

    Abstract: Based on core observation , the characteristics of Chang 10 reservoir in west Wucangpu of Wuqi oilfield have been comprehensive analyzed by cast thin section , scanning electron microscope , image analysis , mercury injection data analysis and mathematical statistics methods.The results demonstrated that : the sandstone of the region of interest reservoir has low compositional maturity , the rock structure also has low maturity , the debris is mainly effusive rock and cryptocrystalline rock , the miscellaneous materials are mainly composed by chlorite , illite , clay ironstone etc , the cement ingredients are mainly calcite , dolomite and cherty ; the hole and permeable sublayer of this reservoir is extremely low , the pore type of this reservoir is mainly intergranular opening and feldspar corroded hollow , the fissure opening is the secondary type , the reservoir physical property is mainly affected by deposit micro-facies distribution roles and diagenesis ; the local developmental microcracks have certain effect to improve reservoir physical property , the sand body property of the subsea diversion channel is the best by evaluating the plane distribution ; the vertical reservoir capacity is controlled by diagenesis ; compaction and cementation make the reservoir physical property obvious become poor ; the secondary pole produced by the dissolution improves the reservoir physical property , forms the effective reservoir.Additionally , this reservoir is predominantlyⅣ.

     

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