本文選題：粒間孔 + 滲流理論��； 參考：《石油學報》2017年10期

【摘要】：粒間孔是顆粒支撐碎屑巖儲層最重要的一類孔隙,其相對含量及連通關系共同決定儲層品質(zhì),尤其對于孔喉結構多樣的致密砂巖。粒間孔具有"大孔被細喉溝通"的連通關系,明顯不同于"類樹形孔隙網(wǎng)絡"的粒內(nèi)孔,利用恒速壓汞孔隙體進汞可有效區(qū)分粒間孔主導空間分布范圍,在此基礎上,通過核磁共振定量評價粒間孔對孔隙度的貢獻,聯(lián)合滲流理論及恒速壓汞的喉道分布定量評價其對滲透率的貢獻。致密砂巖粒間孔主導空間對孔隙度貢獻范圍為9%~64%,其對滲透率的貢獻變化范圍為0~87%,兩者呈明顯正相關;粒間孔對滲透率的貢獻量越大,其內(nèi)流體可動性越好;粒間孔對孔滲的貢獻量明顯受機械壓實和以黏土為主的膠結作用共同影響。選取粒間孔主導空間對滲透率的貢獻量(K_(in))為關鍵參數(shù),將致密砂巖儲層劃分為粒間孔主導型(K_(in)≥50%)、混合型(10%K_(in)50%)和粒內(nèi)孔主導型(K_(in)≤10%)3類,該分類綜合考慮了對成巖作用敏感的粒間孔主導空間在整個巖石儲集和滲流能力及流體可動性等方面的貢獻,有效彌補了單純使用喉道或孔隙大小參數(shù)劃分具有多樣孔喉結構致密儲層的不足。
[Abstract]:Intergranular pore is the most important pore in clastic rock reservoir supported by grain. Its relative content and connectivity determine reservoir quality together, especially for tight sandstone with various pore throat structure. The intergranular pore has the connection relation of "big pore with fine throat communication", which is obviously different from the "tree-like pore network" in the intergranular pore. The distribution range of dominant space of intergranular pore can be effectively distinguished by mercury-entering of constant velocity mercury pore body, on the basis of which, The contribution of intergranular pores to porosity was evaluated quantitatively by nuclear magnetic resonance (NMR), combined with percolation theory and the throat distribution of constant pressure mercury. The dominant space of intergranular pore in tight sandstone contributes to porosity in the range of 9J ~ 64, and its contribution to permeability varies from 0 to 87, which is positively correlated with each other, and the greater the contribution of intergranular pore to permeability, the better its fluid mobility. The contribution of intergranular pores to porosity and permeability is obviously influenced by mechanical compaction and cementation of clay. Selecting the contribution of intergranular pore dominant space to permeability as the key parameter, the tight sandstone reservoir is divided into three categories: intergranular pore leading type (K + T) 鈮，

本文編號：1853108