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裂缝的发育不仅可以提高基质渗透率,增大油气产量,而且可能成为油气二次运移的主要通道,因此定量评价储层(尤其是致密砂岩储层)的裂缝频率、发育规模和空间分布是十分必要的,通过岩心观察、薄片分析及测井资料解释等表明,研究区盒8、山1、山2段裂缝较为发育,以水平裂缝和高角度近垂直裂缝为主;约90%的裂缝为有效裂缝,显示气层或干层;约30%的裂缝产出层段为气层和含气层,可见宏观裂缝的发育为油气富集提供了良好的运移通道。成像测井显示,研究区微裂缝发育也较为广泛,以垂直裂缝为主,为天然气向上运移提供了通道。
The development of fractures can not only improve the permeability of the matrix and increase the production of oil and gas, but also may be the main channel for secondary migration of oil and gas. Therefore, the quantitative evaluation of fracture frequency, development scale and spatial distribution of fractured reservoirs (especially tight sandstone reservoirs) It is very necessary that the fractures in box 8, hill 1 and hill 2 of the study area are well developed by the observation of cores, thin slices and interpretation of log data. The fractures are mainly horizontal fractures and high-angle fractures. About 90% of the fractures For the effective fractures, the gas or dry layers are shown. About 30% of the fractured output intervals are gas reservoirs and gas reservoirs, which shows that the development of macro-fractures provides a good migration channel for oil and gas enrichment. Imaging logging shows that the microcracks in the study area are also widely developed, mainly vertical fractures, providing a channel for upward migration of natural gas.