本文選題：疏松砂巖 + 稠油油藏　； 參考：《中國(guó)礦業(yè)大學(xué)學(xué)報(bào)》2017年05期

【摘要】：對(duì)勝利油田疏松砂巖稠油油層中孔隙結(jié)構(gòu)分布及油、水賦存狀態(tài)進(jìn)行研究,選取濟(jì)陽坳陷沾化凹陷館下段疏松砂巖稠油油藏巖樣,開展巖心微米尺度的CT掃描檢測(cè),利用油水散失校正后的巖心分析殘余油水飽和度,對(duì)CT掃描圖像進(jìn)行反演標(biāo)定,確定了不同流體的灰度區(qū)分界限值,認(rèn)為疏松砂巖稠油儲(chǔ)層具有與傳統(tǒng)認(rèn)識(shí)不同的油水賦存特征.結(jié)果表明:水的灰度區(qū)分界限值范圍為4 000~4 800;油的灰度區(qū)分界限值范圍為0~4 000.在稠油儲(chǔ)層巖樣中除了連通性好的儲(chǔ)油孔隙外,存在另外兩類孔隙,其中油水賦存形式分別為"分隔水滴"和"孤立油滴".這種稠油油層孔隙分布及油水賦存狀態(tài)可以較好地解釋稠油油藏開發(fā)初期即出水的現(xiàn)象,測(cè)井解釋稠油油層含油飽和度通常比實(shí)際密閉取芯值大5%,而稠油油藏構(gòu)造較低部位井投產(chǎn)初期含水量達(dá)到40%以上,也不意味著開采層位到了油水界面,這為修正測(cè)井解釋飽和度及后期油層有效開發(fā)井位部署提供了依據(jù).
[Abstract]:The distribution of pore structure and the occurrence of oil and water in loose sandstone heavy oil reservoirs in Shengli Oilfield were studied. The rock samples of loose sandstone heavy oil reservoirs in the lower Guanhua member of Zhanhua depression in Jiyang depression were selected and the CT scanning of core micron scale was carried out. The residual oil and water saturation is analyzed by using the core after correction of oil and water loss, and the CT scanning image is back calibrated, and the gray level differentiation boundary value of different fluid is determined. It is considered that the loose sandstone heavy oil reservoir has the characteristics of oil and water occurrence which are different from the traditional understanding. The results show that the limit value of gray scale of water is 4 000 ~ 4 800 and that of oil is 0 ~ 4 000. In the rock samples of heavy oil reservoir, there are two kinds of pores except those with good connectivity. The occurrence of oil and water is in the form of separated water droplets and isolated oil droplets, respectively. This kind of pore distribution and oil-water occurrence state of heavy oil reservoir can explain the phenomenon that the heavy oil reservoir is out of water at the early stage of development. Log interpretation of oil saturation in heavy oil reservoirs is usually more than 5% higher than the actual closed core value, while the water content of wells in lower structural parts of heavy oil reservoirs reaches more than 40% at the initial stage of production, which does not mean that the production layers reach the oil-water interface. This provides a basis for the correction of logging interpretation saturation and the deployment of effective development wells in late reservoir.
【作者單位】： 同濟(jì)大學(xué)海洋與地球科學(xué)學(xué)院;中石化勝利油田勘探開發(fā)研究院;中國(guó)石化股份勝利油田分公司;西南石油大學(xué)地球科學(xué)與技術(shù)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41672115,41202110) 國(guó)家油氣重大專項(xiàng)(2016ZX05006-001-003) 中國(guó)石化股份公司課題(P14009)
【分類號(hào)】：P618.13

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