摘要
对八面河油田面120区沙三油层含油砂体的岩石学、孔隙发育特征进行了分析和研究,结果表明,该区储集砂体为成分成熟度较低的长石砂岩;主要自生矿物为伊利石、蒙脱石、方解石、石英、高岭石、绿泥石和白云石等;储层次生孔隙发育,主要孔隙类型为粒间溶孔、粒内溶孔和铸模孔。孔隙结构具有中孔、中喉的特点,对渗透率有贡献的主要是大于2．5μm喉道。影响孔隙发育的主要因素是沉积作用及成岩作用,溶解作用形成的次生孔隙是研究区储层的主要空间。
According to the analysis of lithology and porosity feature of Sha3 member of Mian 120 area in Bamianhe oil- field,sandbodies are found to be arkoses with low compo- sitional maturity.The authigenic minerals include illite, montmorillonite,calcite cement,quartz,kaolinite,chlo- rite and dolomite.Secondary pore system is developed. The main pore types are dissolved pores between grains, dissolved pores in grains and moldic pores.The pore structure is characterized by medium porosity and medium pore throat,and the ones with bigger throat than 2.5μm are good to permeability.Pore development is mainly af- fected by diagenesis and sedimentation.The secondary pore system formed by dissolution can be used as main reservoirs space.
出处
《石油地质与工程》
CAS
2007年第2期18-20,7-8,共3页
Petroleum Geology and Engineering
关键词
八面河油田
沙三段
自生矿物
孔隙特征
Bamianhe oilfield
third memberof Shahejie formation(Sha3)
authigenic mineral
pore characteristics
