宝浪苏木构造带储集层特殊地质特征探讨  

A DISCUSSION ON THE SPECIAL RESERVOIR GEOLOGICAL FEATURES OF SUMU STRUCTURAL BELT IN BAOLANG OILFIELD

作　　者：王敏[1] 赵跃华[2] 

机构地区：[1]西北大学地质学系 [2]河南石油勘探开发研究院

出　　处：《成都理工学院学报》2002年第1期31-36,共6页Journal of Chengdu University of Technology

摘　　要：宝浪苏木构造带所属的宝中和宝北两个含油气区块 ,属于特殊的低孔低渗透储集类型。它与东部的许多低渗透油气藏相比 ,具有岩性偏粗 (含巨砾 ) ,以不等粒砂岩和含砾不等粒砂岩为主 ,占 78.41 % ;矿物成分成熟度和结构成熟度较低 ,颗粒破碎严重 ,粘土矿物 (尤其是高岭石 )和地层微粒含量较高 ,储集层主要渗流通道为 1～ 6.3 μm(体积占 2 5 .88% ,却提供了67.2 1 %的渗透率贡献值 ) ,以特低 -低渗透中孔细喉不均匀型储集层为主。地层水阳离子变化幅度大 ,为 680 1～ 3 4788mg/ L;水型复杂 ,地下流体性质纵、横向上非均质性明显 。There are two oil and gas bearing blocks in the Sumu structural belt in the Baolang Oilfield, the Central and the Northern Baolang. They both are superlow porous and low permeable reservoirs. Compared with many low permeable petroleum reservoirs in eastern China, they are characterized by 78.41% coarse lithology of uneven sandstones and gravel bearing sandstones, low maturity for minerals and structures accompanied by broken grains, high content of clay minerals and formation micro grains. These reservoirs are mainly heterogeneous ones with super low to low permeability, medium pores and fine throats. Their major flowing paths are 1~6.3 μm in radius (only 25.88% in volume, but contributing to 67.21% permeability). The salinity of formation water varies greatly from 6801 to 34 788 mg/L with complicated water type. The properties of underground water are highly heterogeneous both vertically and horizontally, thus resulting in severe formation damage.

关 键 词：构造带 储集层 成熟度 孔隙结构 流体性质 渗透率 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]