• 责任者：Gao Zhiyong (Petroleum Geology Research Laboratory Center ; RIPED ; Beijing 100083 ; China) ; Cui Jinggang
• 刊名：Acta Petrolei Sinica
• 出版年：2013
• 卷期：34(5)
• 关键词：砂岩储集层 ; sandstone reservoirs ; 库车坳陷 ; Kuqa Depression
• 页码：p.867-876
• 图表：7 illus., 2 tables, 32 refs.
• 分类号：1003
• issnNo：ISSN0253-2697
• isbnNo：CN11-2128/TE

     The burial history for reservoirs of foreland basins in the central and western China is characterized by long term shallow burial at the early stage and rapid deep burial at the late stage. Under a geological process constraint, we conducted a series of simu lation experiments on diagenesis and analyzed the burial compaction process of deep reservoirs in the Kuqa foreland basin and its re working effect. By quantitative evaluations of reservoir physical property parameters, such as plane porosity, apparent compaction percentage, porosity reduction rate, pore and neck diameters, a direct effect of burial compaction on the apparent compaction per centage and porosity reduction rate was verified, meanwhile, burial compaction of reservoirs was found to control variations in pore and neck diameters of sandstones with different grain size. At the early slow and shallow burial stage, compaction might result in not only less grain crackles as well as grain displacement and rearrangement in clastic rocks, such as coarse and mesograined sandstones, but also a random grain arrangement of aphanides, such as packsands and siltstones. At the late rapid burial compaction stage, along with increasing burial depth, compaction might lead to an oriented arrangement tendency for skeleton grains, and crackles and diage- netic fractures widely developed in clasitc grains representative of near-source deposition, such as coarse and mesograined sand stones, while sihstones deposited in foredeep belts showed less-developed grain crackles but some diagenetic fractures. Therefore, crackles and diagenetic fractures of clastic grains formed under rapid deep burial are attributed to a major cause for dissolution occur fence and permeability enhancement of deep reservoirs.