本文選題：鄂爾多斯盆地 + 延長組��； 參考：《地質(zhì)與勘探》2017年02期

【摘要】：綜合鄂爾多斯盆地西南部鎮(zhèn)涇地區(qū)延長組長8油層組的巖心、薄片、孔滲及壓汞測試等資料,在長8儲層結(jié)構(gòu)、儲層質(zhì)量發(fā)育控制因素研究基礎(chǔ)上,對長8低滲致密砂巖儲層進(jìn)行了分類評價。結(jié)果表明,長8砂巖儲層發(fā)育低孔-特低滲儲集物性,儲層孔隙結(jié)構(gòu)具有細(xì)-微孔喉、排驅(qū)壓力大、分選差的特征,主要可分為3種類型,其中發(fā)育Ⅰ型曲線儲層孔滲性最好。沉積作用形成的物質(zhì)基礎(chǔ)決定了儲層原始孔滲性能,其中分流河道及水下分流河道具最優(yōu)孔滲性能;成巖作用中,壓實作用是儲層儲集性能破壞的主要因素;溶蝕作用起建設(shè)性改善作用。選取孔隙度、滲透率、孔隙排驅(qū)壓力、中值壓力和中值孔喉半徑等主要儲層參數(shù)進(jìn)行聚類分析,將長8儲層劃分為3種類型:Ⅰ類為最好儲層,Ⅱ類為較好儲層,Ⅲ類為相對最差儲層。其中,Ⅰ類儲層主要分布于分流河道分叉疊置及水下分流河道匯聚疊合部位,儲層品質(zhì)最好,為最有利勘探目標(biāo)。
[Abstract]:Based on the data of core, thin slice, pore permeability and mercury injection test of Chang 8 formation in Zhenjing area, southwest of Ordos Basin, on the basis of study on reservoir structure and controlling factors of reservoir quality development, The classification and evaluation of Chang 8 low permeability tight sandstone reservoir are carried out. The results show that the reservoir of Chang 8 sandstone has low porosity and very low permeability. The pore structure of Chang 8 sandstone reservoir has the characteristics of fine micropore throat, large displacement pressure and poor sorting. It can be divided into three main types, among which type I curve reservoir has the best porosity and permeability. The material foundation formed by sedimentation determines the original pore and permeability performance of reservoir, in which distributary channel and underwater distributary river props optimize pore and permeability performance, compaction is the main factor of reservoir performance destruction in diagenesis. Dissolution plays a constructive role in improvement. The main reservoir parameters, such as porosity, permeability, pore displacement pressure, median pressure and median pore throat radius, are selected for cluster analysis. Chang8 reservoir is divided into three types: type 鈪，

本文編號：2072313