發(fā)布時(shí)間：2018-01-06 03:24

  本文關(guān)鍵詞：大慶油田薩中開(kāi)發(fā)區(qū)特高含水期微觀剩余油成因及動(dòng)用機(jī)制研究　出處：《東北石油大學(xué)》2015年博士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 剩余油 微觀作用力 多孔介質(zhì) 微觀剩余油成因 動(dòng)用機(jī)制

【摘要】：我國(guó)作為原油消費(fèi)大國(guó),提高探明地質(zhì)儲(chǔ)量采收率是石油行業(yè)實(shí)現(xiàn)高效開(kāi)發(fā)永恒不變的主題。然而,隨著國(guó)民經(jīng)濟(jì)的飛速發(fā)展,國(guó)內(nèi)油氣資源明顯供不應(yīng)求。大慶油田薩中開(kāi)發(fā)區(qū)經(jīng)過(guò)幾十年的挖潛現(xiàn)在已經(jīng)進(jìn)入特高含水開(kāi)發(fā)階段,盡管剩余油高度分散、綜合含水率高達(dá)95%,但是仍有一半以上的剩余儲(chǔ)量滯留在地下尚未得到有效動(dòng)用。剩余油表現(xiàn)形式分為宏觀剩余油和微觀剩余油,在井網(wǎng)一定條件下,剩余油的形成與儲(chǔ)層性質(zhì)、構(gòu)造特點(diǎn)、井網(wǎng)控制程度和驅(qū)替方式等因素有關(guān)。因此,研究特高含水期剩余油分布規(guī)律及其成因機(jī)制,清晰準(zhǔn)確地認(rèn)識(shí)剩余油成因和啟動(dòng)條件,努力將零散分布的剩余油轉(zhuǎn)化為待采出的可動(dòng)油,不斷提高油田采收率,實(shí)現(xiàn)特高含水期老油田的有效開(kāi)發(fā),具有十分重要的現(xiàn)實(shí)意義和研究?jī)r(jià)值。本文對(duì)國(guó)內(nèi)外微觀剩余油形成機(jī)理和動(dòng)用機(jī)制方面做了大量的調(diào)研工作,基于前人研究成果,主要在微通道內(nèi)流體滲流特征、水驅(qū)油過(guò)程流體運(yùn)動(dòng)規(guī)律及微觀作用力影響下微觀剩余油的成因及動(dòng)用理論進(jìn)行研究和探討。基于薩中開(kāi)發(fā)區(qū)精細(xì)地質(zhì)研究成果,系統(tǒng)全面地開(kāi)展了微通道內(nèi)微觀流體動(dòng)力學(xué)機(jī)制研究,認(rèn)識(shí)并證實(shí)了范德華力和界面張力在微通道小孔隙流動(dòng)中的影響。從微觀界面力學(xué)出發(fā),在多孔介質(zhì)孔喉尺度下流體的流動(dòng)特征研究的基礎(chǔ)上,圍繞微觀作用力對(duì)多孔介質(zhì)滲流作用的影響,建立了牛頓流體在微圓管內(nèi)流動(dòng)的數(shù)學(xué)模型,并推導(dǎo)得到流體在微圓管內(nèi)的速度分布和平均流量分布模型;建立了水驅(qū)油毛管束網(wǎng)絡(luò)數(shù)學(xué)模型,通過(guò)模擬分析闡明了微觀力在多孔介質(zhì)壁面上的作用及對(duì)滲流的影響：結(jié)合薩中開(kāi)發(fā)區(qū)儲(chǔ)層微觀孔隙結(jié)構(gòu)特征,建立了考慮固液界面作用力的不同類(lèi)型儲(chǔ)層水驅(qū)油三維網(wǎng)絡(luò)動(dòng)態(tài)模型,并進(jìn)行微觀剩余油變化規(guī)律數(shù)值模擬,從而研究?jī)?chǔ)層孔隙結(jié)構(gòu)特征對(duì)微觀剩余油形成的影響；通過(guò)水驅(qū)油三維網(wǎng)絡(luò)模型模擬結(jié)果,揭示了不同類(lèi)型儲(chǔ)層的喉道半徑、孔喉比、配位數(shù)及潤(rùn)濕比等因素對(duì)微觀剩余油分布的影響規(guī)律;開(kāi)展多孔介質(zhì)微觀剩余油成因及動(dòng)用機(jī)制研究,對(duì)不同儲(chǔ)層不同類(lèi)型微觀剩余油進(jìn)行定量描述,認(rèn)識(shí)不同類(lèi)型剩余油成因,揭示剩余油動(dòng)用機(jī)制;根據(jù)微觀剩余油存在類(lèi)型的不同,制定相應(yīng)的挖潛思路和對(duì)策,完善并豐富了微觀剩余油理論,為剩余油有效挖潛提供理論指導(dǎo)。研究表明：在微尺度條件下,分子間范德華力對(duì)微通道內(nèi)流體流動(dòng)規(guī)律的影響不可忽略；考慮液固界面作用時(shí),微管內(nèi)水相流動(dòng)規(guī)律明顯不同于傳統(tǒng)泊肅葉流動(dòng)結(jié)果；微觀剩余油分布主要受儲(chǔ)層潤(rùn)濕性、毛管力以及儲(chǔ)層物性特征等因素影響,孔喉比越大、配位數(shù)越小、毛細(xì)管壁的哈默克常數(shù)越大,剩余油越富集；微觀剩余油主要表現(xiàn)為分散狀、連片狀和膜狀三種形式,分散狀剩余油主要分布在孔道半徑和喉道半徑比較大的儲(chǔ)層；連片狀剩余油主要存在于喉道半徑小的孔喉：膜狀剩余油與巖石孔喉的潤(rùn)濕性關(guān)系緊密,親油性孔隙壁對(duì)油的附著力加大,易形成油膜：研究分析表明,通過(guò)改善儲(chǔ)層孔喉結(jié)構(gòu)、調(diào)整驅(qū)替方向和改變驅(qū)替體系等方式可實(shí)現(xiàn)不同類(lèi)型微觀剩余油的啟動(dòng),進(jìn)而提高原油采收率。
[Abstract]:China is a big country of consumption of crude oil, improve oil recovery is proven geological reserves of oil industry to achieve efficient development of eternal theme. However, with the rapid development of national economy, the domestic oil and gas resources were in short supply. In Sazhong development area in Daqing oilfield after decades of tapping has now entered the development stage of high water content, although the height of residual oil dispersion, comprehensive water content as high as 95%, but there are still more than half of the remaining reserves remain in the ground has not been effectively utilized. The residual oil forms are divided into macro and micro residual oil remaining oil in well under certain conditions, the formation of residual oil and reservoir properties, structural features and related factors of degree of well control and the displacement mode. Therefore, the remaining oil distribution and formation mechanism of super high water cut period, clear and accurate understanding of residual oil formation and start-up conditions, efforts will be scattered The remaining oil into the movable oil to be produced, and constantly improve the oil recovery, to achieve effective development in High Watercut Stage of old oilfield, has very important practical meaning and research value. This paper at home and abroad on the micro residual oil forming mechanism and the use of mechanisms to do a lot of research work, based on the results of previous studies. Mainly in the micro channel flow characteristics, the water flooding causes fluid movement regularity of oil process and the micro force under the influence of micro residual oil and the use of the theory was studied and discussed. The development zone based on fine geologic research, system, carry out a comprehensive study of micro fluid dynamics mechanism in micro channel, and confirmed the effect Vander Ed Ley and interfacial tension on the micro channel flow in small pores. Starting from the micro mechanical interface, based on the fluid flow characteristics in porous medium pore scale on the surrounding Effect of micro forces on seepage in porous media, a mathematical model of Newton fluid in micro tube flow, and derived fluid in micro circular velocity distribution in the pipe and the average flow distribution model is established; water flooding capillary network mathematical model, through simulation analysis illustrates the microscopic force in porous media wall on the role and influence of flow: the combination of Sazhong area of microscopic reservoir pore structure characteristics, considering the solid-liquid interface force of different types of water drive oil reservoir dynamic model of three-dimensional network simulation, and numerical micro residual oil, so as to study effects of reservoir pore structure characteristics on the formation of the micro residual oil; water flooding by three-dimensional model simulation results, reveals the different types of reservoir pore throat radius, pore throat ratio, coordination number and wetting ratio on the micro distribution of remaining oil Influence; research and use of the micro mechanism of residual oil formation in porous media, the quantitative description of different reservoirs of different types of micro residual oil, understanding the different types of remaining oil origin, reveal the remaining oil producing mechanism; according to different types of micro residual oil, for tapping the corresponding ideas and measures, improve and enrich the micro the remaining oil potential theory, the remaining oil is effective to provide theoretical guidance. The results show that: in the micro scale conditions, effects of van Edward intermolecular forces on the fluid flow law in the micro channel can not be ignored; considering the liquid-solid interface when water phase flow of microtubules is significantly different from traditional Poiseuille flow results; microstructure the remaining oil distribution is mainly affected by the reservoir wettability, capillary force and the influence of reservoir characteristics and other factors, the bigger the pore throat ratio, coordination number is small, the capillary wall hammoc constant larger residual oil The main performance of the micro residual oil enrichment; for the scattered, sheet and film three forms, scattered remaining oil is mainly distributed in the reservoir pore throat radius and radius is relatively large; the remaining oil sheet mainly exists in the throat throat radius is small: wettability relationship between film remaining oil and rock pore throat tight adhesion lipophilic pore wall of oil increase, easy to form oil film: research shows that through the improvement of reservoir pore structure, adjust the displacement direction and displacement change system can be realized in different types of micro residual oil to start, and then improve the oil recovery.

【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TE327

【引證文獻(xiàn)】

中國(guó)期刊全文數(shù)據(jù)庫(kù) 前1條

1 朱維耀;張曉靜;韓宏彥;李兵兵;李建輝;;配位數(shù)對(duì)剩余油分布及采收率的影響[J];當(dāng)代化工;2017年01期

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本文編號(hào)：1386078