| 摘要: |
| 以储层微观特征及孔隙结构分析为手段,对高南油田低渗储层的特征及其控制因素进行了研究。结果表明: 高南东三段储层岩石类型以长石岩屑砂岩及岩屑长石砂岩为主,储层中起决定作用的孔隙类型主要为粒间溶孔及 长石粒内溶孔;喉道主要为片状及弯片状,发育了大孔粗喉型、大-中孔中-细喉型、中孔细喉型、细孔细喉型、微细孔 喉型等5种孔喉组合类型;高南东三段60%以上的储层属低渗储层,砂体成因类型、成岩作用及储层微观孔隙结构 等是控制低渗储层形成的主要因素;多数低渗储层属于分流河口砂坝成因,压实作用是低渗储层形成的关键成岩作 用,储层中喉道直径均值较低及喉道类型是决定研究区储层低渗的直接原因。 |
| 关键词: 低渗储层 储层特征 东三段 高尚堡油田 |
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| Low permeability reservoir characteristics of Ed3 in the south of Gaoshangpu Oilfield and its control factors |
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HAO Jian-ming1,2,3,QIU Long-wei4
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(1. Institute of Geochemistry Chinese Academy of Sciences，Guiyang 550002, China ;2. Petroleum Exploitation Department? Jidong Oilfield Branch Company, PetroChma, Tangshan 063004, China;3. Graduated School of Chinese Academy of Sciences, Beijing 100049, China;4. College of Geo-Resources and Information in China University of Petroleum, Dongying 257061，China)
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| Abstract: |
| The low permeability reservoir characteristics of Gaoshangpu Oilfield and its control factors were studied through microscopy and analysis of pore structure The results show that feldspathic lithic standstone and iithic arkose are the main rock types of reservoir in Gaonan area. Intergranular and inner granular porosity of feldspar are the most important pore types in this area Tlie main throats types are lamellar and curved lamellar throats. Five pore-Uiroat combination types including big pore and coarse throat combination，big to medium pore and medium to fine throat combination, medium pore and fine throat combination, fine pore and fine throat combination and minuteness pore and throat combination were developed. In Ed3 of Gaonan Oilfield, more than 60% of reservoir rocks are low permeability which is determined by fonning types of sand body， diagenesis and raicro-pore structure features. Distributary mouth bar is the dominantly fonning type of sand body and compaction is the key factor of diagenesis. Smaller throat diameter and throat types are the direct factors to fonning low permeability reservoir in this area. |
| Key words: Jow permeability reservoir reservoir characteristics Ed3 formation Gaoshangpu Oilfield |
