物理模拟法定量表征碎屑岩储层物性影响因素

发布时间：2018-04-21 15:09

本文选题：物理模拟 + 碎屑岩储层　；参考：《地质科技情报》2017年04期

【摘要】：碎屑岩储层物性与成岩作用密切相关,压实作用是成岩作用的重要组成部分,是储层物性降低的主要因素之一。为对地质历史时期压实作用条件下储层物性变化进行定量化表征,通过物理模拟实验,分别研究了在压实作用下不同地温条件和不同埋藏方式下砂岩储层孔隙度和渗透率的变化规律。研究结果表明:在砂岩物源相同,分选、磨圆类似的前提下,砂岩孔渗参数与地温均呈对数负相关关系,且地温梯度越高,孔渗参数随埋深的下降速率越大。即使是在相同的埋藏终止条件下,随着埋藏时间增加,岩石抗压能力会发生下降,骨架颗粒会趋于定向排列,从而导致岩石孔渗参数呈随埋藏时间增加呈对数减少。在不同的沉降过程条件下,即使处于同一地温场,并且埋藏终止状态相同,经历过构造抬升的砂岩物性明显要差于持续埋藏的砂岩物性。
[Abstract]:The physical properties of clastic reservoirs are closely related to diagenesis. Compaction is an important part of diagenesis and one of the main factors for the decrease of reservoir physical properties. In order to quantitatively characterize the changes of reservoir physical properties under compaction in geological historical period, the physical simulation experiments are carried out. The variation of porosity and permeability of sandstone reservoir under different geothermal conditions and different burial modes under compaction is studied respectively. The results show that the porosity and permeability parameters of sandstone have logarithmic negative correlation with the ground temperature on the premise of the same material source, separation and grinding circle, and the higher the geothermal gradient, the greater the decrease rate of pore and permeability parameters with buried depth. Even under the same burial termination condition, with the increase of burial time, the compressive capacity of rock decreases, and the skeleton particles tend to be aligned, which leads to the decrease of pore and permeability parameters with the increase of burial time. Under different subsidence conditions, even in the same geothermal field and the same burial termination state, the physical properties of sandstone with tectonic uplift are obviously worse than those of continuously buried sandstone.
【作者单位】：中国石油大学(北京)地球科学学院;中国石油大学(北京)油气资源与探测国家重点实验室;中国石化胜利油田公司勘探开发研究院;
【基金】：国家自然科学基金项目(41272157)
【分类号】：P618.13

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