本文選題：物理模擬 + 碎屑巖儲層　； 參考：《高校地質學報》2017年04期

【摘要】：為定量恢復地質歷史時期碎屑巖儲層物性參數(shù)的演化特征,以勝利油區(qū)古近系沙河街組為例,采用物理模擬實驗對純壓實作用下不同的粒度、分選、沉積相類型及不同地層流體性質的砂巖儲層孔隙度和滲透率的變化規(guī)律進行研究。結果表明:物源相同時,分選、磨圓類似的巖石,隨著粒度的增大,孔隙度減小、滲透率則增大;而對于粒徑范圍相同、分選不同的巖石,其孔隙度和滲透率均同分選呈現(xiàn)較好的正相關性,即分選越好物性也越好。在不同地層流體條件下,儲層抗壓能力不同,酸性水介質條件下巖石抗壓能力最小,且隨著埋深增加孔隙度減少的速率相對較快;而在堿性水介質下,其孔隙度隨深度的變化速率則相對較慢;當?shù)貙恿黧w介質發(fā)生改變時,即酸堿度降低至中性水介質條件時,抗壓實能力則會得到一定程度的恢復�？傮w上,碎屑巖儲層的孔隙度同埋深基本呈現(xiàn)對數(shù)關系,滲透率與埋深均呈指數(shù)關系。模擬實驗結果與實際埋深相對較淺的碎屑巖儲層(小于2500 m)孔隙度演化特征吻合度較高,表明在淺層影響儲層物性的因素主要為壓實作用;而中深層的儲層物性影響因素較多,其定量化研究還需綜合考慮其它參數(shù)。
[Abstract]:In order to quantitatively restore the evolution characteristics of physical parameters of clastic reservoir in geological history, taking the Shahejie formation of Paleogene in Shengli oil area as an example, different granularity and sorting under pure compaction were studied by physical simulation experiment. The variation of porosity and permeability of sandstone reservoir with different formation fluid properties and sedimentary facies types are studied. The results show that when the material source is the same, the porosity decreases and the permeability increases with the increase of particle size, while for the rock with the same particle size range, the rock is separated with the same particle size. The porosity and permeability show a good positive correlation with the separation, that is, the better the separation, the better the physical properties. Under different formation fluid conditions, the reservoir pressure resistance is different, and the rock pressure resistance is the least in acidic water medium, and the decrease rate of porosity decreases relatively quickly with the increase of buried depth, but in alkaline water medium, The change rate of porosity with depth is relatively slow, and when the local layer fluid medium changes, that is, when the pH decreases to neutral water medium, the compaction resistance will be restored to a certain extent. In general, the porosity of clastic reservoir is logarithmic with the buried depth, and the permeability is exponentially related to the buried depth. The simulation results agree well with the porosity evolution characteristics of clastic rock reservoirs (less than 2500 m), which indicate that compaction is the main factor that affects reservoir physical properties in shallow layer, but there are many factors affecting reservoir physical properties in middle and deep layers. The quantitative study also needs to consider other parameters synthetically.
【作者單位】： 中國石油大學(北京)地球科學學院;中國石油大學(北京)油氣資源與探測國家重點實驗室;中國石化勝利油田公司勘探開發(fā)研究院;
【基金】：國家自然科學基金項目(41672098;41272157) 國家油氣重大科技專項(2016ZX05006-006)聯(lián)合資助
【分類號】：P618.13

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