本文選題：礁灰?guī)r　切入點(diǎn)：相滲曲線　出處：《西南石油大學(xué)》2017年碩士論文

【摘要】：LH11-1油田是位于珠江口盆地沉降中的東沙隆起地區(qū)的大型生物礁灰?guī)r油藏。油藏主要采用水驅(qū)開發(fā),但是由于儲(chǔ)層地質(zhì)條件復(fù)雜,目前位于開發(fā)區(qū)的生產(chǎn)井含水上升很快,總的油藏采出程度較低。為了進(jìn)一步提高LH11-1油田的采出程度,需要對(duì)這種溶洞-孔隙型礁灰?guī)r油藏的油水兩相滲流特征做進(jìn)一步的研究,為此本文針對(duì)LH礁灰?guī)r油藏開展了一系列的油水兩相驅(qū)室內(nèi)實(shí)驗(yàn)研究。本文首先對(duì)從LH11-1油田取得的巖心進(jìn)行了物性分析,然后進(jìn)行了一系列短巖心和長(zhǎng)巖心的油水驅(qū)替實(shí)驗(yàn)研究了礁灰?guī)r的滲流機(jī)理,并在此基礎(chǔ)上通過注入不同的流體研究了適合礁灰?guī)r油藏的提高采收率方式。取得的認(rèn)識(shí)如下:1對(duì)取得的巖心進(jìn)行了物性分析,結(jié)果表明礁灰?guī)r孔隙結(jié)構(gòu)復(fù)雜,孔洞十分發(fā)育,局部存在微裂縫,巖心含有大量的敏感性礦物,巖性十分復(fù)雜。2選取了 5塊短巖心進(jìn)行了相滲分析,結(jié)合礁灰?guī)r的物性特點(diǎn)分析了其形態(tài)特征。分析了滲透率級(jí)差實(shí)驗(yàn)中產(chǎn)生的特殊現(xiàn)象,為油藏以后的開發(fā)提供了依據(jù)。3選取了不同物性的巖心進(jìn)行了長(zhǎng)巖心實(shí)驗(yàn),獲得了其在高溫高壓條件下的油水相對(duì)滲透率曲線,通過結(jié)合相應(yīng)的滲流知識(shí)分析了礁灰?guī)r油藏油水的滲流特征。4在高倍水驅(qū)基礎(chǔ)上分別注入了氮?dú)馀菽�、凝膠和聚合物三種不同的流體,分析了適合于礁灰?guī)r油藏的提高采收率方式。通過以上的研究加深了對(duì)礁灰?guī)r油藏水驅(qū)油滲流特征的認(rèn)識(shí),為油田以后開發(fā)策略的調(diào)整,采用合理的方式提高原油采收率提供了依據(jù)。
[Abstract]:LH11-1 oil field is a large reef limestone reservoir in Dongsha uplift area, which is located in the subsidence of Pearl River mouth basin. The reservoir is mainly developed by water flooding. However, due to the complex geological conditions of the reservoir, the water cut of the production well in the development zone is rising rapidly at present. In order to further improve the recovery degree of LH11-1 oilfield, it is necessary to further study the oil-water two-phase percolation characteristics of this kind of cavern-pore reef limestone reservoir. In this paper, a series of laboratory experiments of oil-water two-phase flooding are carried out for LH reef limestone reservoir. Firstly, the physical properties of the core obtained from LH11-1 oilfield are analyzed. Then a series of oil-water displacement experiments of short core and long core were carried out to study the seepage mechanism of reef limestone. On the basis of this, different fluids are injected into the reservoir to study the ways to improve the recovery factor of the reef limestone reservoir. The obtained understanding is as follows: 1. The physical properties of the obtained core are analyzed. The results show that the pore structure of the reef limestone is complex and the pore cavity is very developed. The core contains a large number of sensitive minerals, and the lithology is very complicated. 2. 5 short cores are selected for phase permeability analysis. Combined with the physical characteristics of reef limestone, the morphological characteristics of reef limestone are analyzed, and the special phenomena in permeability differential experiment are analyzed, which provides a basis for reservoir development. 3. The long core experiments are carried out by selecting cores with different physical properties. The relative permeability curves of oil and water under high temperature and high pressure are obtained. By combining the percolation knowledge, the characteristics of oil and water percolation in reef limestone reservoir are analyzed. 4. Nitrogen foam is injected separately on the basis of high power water drive. Three different kinds of fluids, gel and polymer, are analyzed in this paper, which are suitable for improving oil recovery in reef limestone reservoir. Through the above research, we have deepened the understanding of the characteristics of water drive oil percolation in reef limestone reservoir, so as to adjust the development strategy of oil field in the future. A reasonable way to improve oil recovery is provided.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE357.6

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