【摘要】：目前我國稠油油藏(新疆、遼河)已經(jīng)進入火驅(qū)先導(dǎo)試驗階段,在注蒸汽升溫的基礎(chǔ)上開展預(yù)注空氣技術(shù),但由于各開發(fā)區(qū)塊的油層溫度相對較低,要使油藏達到自燃點火就需要人為抬升儲層溫度,而不同稠油藏其原始含水飽和度不同,且粘土礦物含量隨機分布,為了加速稠油與氧氣的反應(yīng)速率,外界干預(yù)作用效果不顯著,成本高,工藝復(fù)雜。因此,研究含水飽和度和粘土礦物對稠油低溫氧化速率及氧化反應(yīng)時升溫速率變化影響有十分重要的現(xiàn)實意義和經(jīng)濟意義。本文通過室內(nèi)靜態(tài)模擬實驗對影響低溫氧化速率及升溫速率的因素進行了系統(tǒng)的研究。采用高溫高壓反應(yīng)釜進行了不同含水飽和度對稠油低溫氧化速率及升溫速率影響實驗研究,其結(jié)果表明,30%含水飽和度對稠油低溫氧化升溫速率起到了促進作用,CO2和CO氣體量隨含水飽和度的增加而減小;采用正交試驗分析法確定出能夠增大低溫氧化升溫速率且稠油流動性提升的最佳工藝條件為高空氣油比-含水飽和度為30%-溫度為180℃,因素作用的主次順序為空氣油比、含水飽和度、溫度;采用高溫高壓反應(yīng)釜進行了不同類型粘土礦物及其濃度對稠油低溫氧化升溫速率影響實驗研究,其結(jié)果表明,稠油在含蒙脫石的多孔介質(zhì)中升溫速率及氧化速率和碳鍵剝離反應(yīng)速率明顯提高,各種粘土礦物的催化能力為:蒙脫石綠泥石高嶺石;采用正交試驗分析法確定出稠油低溫氧化過程中因素作用的主次順序為蒙脫石、溫度和空氣油比,蒙脫石含量高的稠油藏實施預(yù)注空氣時的最佳工藝條件為油藏溫度升至為180℃,粘土礦物濃度為15%,高注氣量條件下進行。
[Abstract]:At present, heavy oil reservoirs in China (Xinjiang, Liaohe) have entered the pilot stage of fire drive, and preinjected air technology has been developed on the basis of steam injection heating, but the reservoir temperature in each development block is relatively low. In order to make the reservoir achieve spontaneous ignition, it is necessary to raise the reservoir temperature artificially, and different heavy oil reservoirs have different original water saturation and random distribution of clay mineral content. In order to accelerate the reaction rate between heavy oil and oxygen, The effect of external intervention is not significant, the cost is high, and the process is complex. Therefore, it is of great practical and economic significance to study the effects of water saturation and clay minerals on the low temperature oxidation rate of heavy oil and the change of temperature rise rate during oxidation reaction. In this paper, the influence factors of low temperature oxidation rate and temperature rise rate are systematically studied by indoor static simulation experiment. The effect of different water saturation on low temperature oxidation rate and heating rate of heavy oil was studied by using high temperature and high pressure reactor. The results show that 30% water saturation promotes the temperature rise rate of low temperature oxidation of heavy oil, and the gas volumes of CO2 and CO decrease with the increase of water saturation. The orthogonal test method was used to determine the optimum process conditions for increasing the temperature rise rate of low temperature oxidation and enhancing the flow of heavy oil. The optimum technological conditions were as follows: high air / oil ratio, water saturation and temperature were 30 鈩，

本文編號：2283568