北三台-沙南梧桐构组储层微观特征对比研究

通过对准噶尔盆地东部北三台和沙南油田储层岩石学特征、储层物性变化、孔隙结构变化、成岩作用控制因素、成岩相等储层微观特征的综合研究 ,认为研究区整体储层性质较优 ,北三台储集物性相对好于沙南 ,各区略有差异 ,储集性质除与储层埋藏深度有关外 ,还与储层的物质组成 ,胶结程度和泥杂基含量 ,经历的埋藏历史和所处的构造变形强弱 ,古地温的高低等有关。北三台斜长石钠长石化溶蚀孔和剩余粒间孔和少杂基成岩相是北三台物性好的原因之一 ;沙南溶孔少 ,长石以钾长石为主 ,富杂基 ,强压实成岩相是沙南相对于北三台物性差的原因之一。由伊蒙混层转化而来的高岭石和由正常沉积而来的高岭石在北三台和沙南分布有差异

THE CONTRAST STUDY ON MICROCHARACTERISTIC OF WUFONGGOU RESERVOIR OF BEISAN TAI AND SHA NAN OILFIELD

By study on the reservoir lithologic characteristic, the change of petrophysical property and pore configuration, diagenesis controlling factor and microcharacteristic of diagenesis in BeiSanTai and ShaNai oilfield in Eeastern Juggar Basin, it is found that it is better to study the whole reservoir characteristics;the petrophysical property in BeiSanTai is superior to that in ShaNai and there is a little difference in different parts. The property is not only concerned with the burial depth of the reservoir, and it's composition, cementation degree and argillaceous content, burial history and structural change strength and reservoir temperature changes as well. In BeiSanTai oilfield, corrasion pores formed by plagioclase and albitite and residual intergranular pores as well as less impurities diagenesis phase are one of the main reasons why the petrophysical property in BeiSanTai is better. In BeiSanTai oilfield, less corrasion pores, albitite riched impuries and streng compaction diagenesis phase are one of the reasons why petrophysical property in ShaNai Oilfield is poorer.