薩中油田無堿二元復(fù)合體系特性及驅(qū)油效果研究
發(fā)布時(shí)間：2019-03-29 20:06
【摘要】：薩中油田主力油層自1996年以來先后有區(qū)塊投入了聚驅(qū)開采,已完成的部分區(qū)塊取得了提高采收率10-14%的較好效果,累計(jì)采出程度達(dá)到50%以上。目前薩中聚驅(qū)已轉(zhuǎn)入后續(xù)水驅(qū)的區(qū)塊中,含水大于98%的井占總井?dāng)?shù)的43.6%,均已因高含水關(guān)井。這部分井的生產(chǎn),造成產(chǎn)液高、含水高,注采低效循環(huán),增加了生產(chǎn)成本。但在聚驅(qū)后油層中仍有50%左右的儲(chǔ)量沒有采出。目前尚沒有聚驅(qū)后進(jìn)一步提高采收率的有效技術(shù)。表面活性劑/聚合物二元復(fù)合驅(qū)油體系相對于三元復(fù)合驅(qū)來說,配方中去掉了堿,可以最大限度發(fā)揮聚合物的粘彈性,減弱由于堿存在引起的腐蝕結(jié)垢現(xiàn)象,保持超低界面張力的同時(shí),驅(qū)油效果接近三元復(fù)合驅(qū),在降低生產(chǎn)成本的同時(shí)還可明顯提高化學(xué)驅(qū)油劑的環(huán)保性能。因此,為探索聚驅(qū)后進(jìn)一步提高采收率的有效方法,開展無堿二元復(fù)合體系特性及驅(qū)油效果的研究。本文以大慶油田薩中西區(qū)一類儲(chǔ)層為研究對象,首先進(jìn)行了二元復(fù)合體系特性研究,包括二元復(fù)合體系的流變性、界面張力及注入能力的研究。分析了注入體系、巖心滲透率、聚合物濃度、表面活性劑濃度、聚合物相對分子質(zhì)量對流變性、界面張力及注入能力的影響。采用靜態(tài)法研究了二元復(fù)合體系中聚合物和表面活性劑的等溫吸附曲線,運(yùn)用天然巖心研究了二元復(fù)合體系的動(dòng)態(tài)吸附滯留。通過模擬乳狀液,對二元復(fù)合體系乳狀液的穩(wěn)定性、粘度以及聚合物和表面活性劑對油水界面流變性質(zhì)的影響開展了研究。以達(dá)西定律和物質(zhì)平衡法為理論依據(jù),進(jìn)行相滲曲線實(shí)驗(yàn)測定,分析了注入體系、巖心滲透率、聚合物濃度、表面活性劑濃度、聚合物相對分子質(zhì)量以及巖心潤濕性對相對滲透率曲線的影響。利用露頭柱狀巖心和露頭均質(zhì)長巖心開展驅(qū)油實(shí)驗(yàn),研究聚合物平均相對分子質(zhì)量、質(zhì)量濃度、表面活性劑濃度和二元復(fù)合體系毛管數(shù)變化對驅(qū)油效率的影響規(guī)律。最后對薩中油田無堿二元驅(qū)現(xiàn)場區(qū)塊的開發(fā)效果及經(jīng)濟(jì)效益進(jìn)行了總結(jié)。研究表明：隨聚合物相對分子質(zhì)量、濃度和礦化度增加,聚合物體系的粘度、第一法向應(yīng)力差、儲(chǔ)能模量和耗能模量增加、界面張力同時(shí)增加。隨表面活性劑濃度的增加,二元復(fù)合體系粘度先有明顯降低,之后降低變緩,體系界面張力降低。剪切對聚合物體系流變性及界面張力有影響,各參數(shù)值都降低。二元復(fù)合體系注入能力實(shí)驗(yàn)表明低分子量聚合物與地層的配伍性更高,二元復(fù)合體系經(jīng)模擬剪切作用后注入能力大幅度提升。二元復(fù)合體系聚合物的加入,表面活性劑在油砂上的吸附有所減少。二元復(fù)合體系隨著吸附次數(shù)的增加,油水界面張力依次上升。巖心親油性強(qiáng)、含有殘余油和巖心滲透率低都會(huì)導(dǎo)致二元復(fù)合體系中表面活性劑在巖心中的吸附滯留量增大。二元復(fù)合體系乳狀液的穩(wěn)定一方面是由于聚合物和表面活性劑吸附在油／水界面上形成堅(jiān)固的具有粘彈性特征的吸附膜,能有效地防止液滴之間的相互碰撞而引起的聚結(jié)不穩(wěn)定性;另一方面由于聚合物的存在,在連續(xù)相中增加了溶液的粘度,聚合物分子間鏈鏈纏繞形成網(wǎng)絡(luò)結(jié)構(gòu),束縛液滴的自由運(yùn)動(dòng),使乳狀液穩(wěn)定性增強(qiáng)。滲透率大,親水性強(qiáng)的巖心采出程度高且二元復(fù)合驅(qū)比水驅(qū)、聚合物驅(qū)的效果更好,同時(shí)聚合物濃度越高、聚合物相對分子質(zhì)量越大,二元復(fù)合體系驅(qū)油效果越好。隨著聚合物平均相對分子質(zhì)量、質(zhì)量濃度和二元復(fù)合體系毛管數(shù)的增加,二元復(fù)合體系的驅(qū)油效率增加,總采收率增加。對于露頭均質(zhì)長巖心,當(dāng)無堿二元復(fù)合體系主段塞中表面活性劑的濃度達(dá)到0.2%,體系粘度達(dá)到30mPa·s以上時(shí),聚合物驅(qū)后無堿二元復(fù)合體系驅(qū)采收率提高10%OOIP以上,達(dá)到理想效果。根據(jù)表面活性劑濃度和體系粘度對驅(qū)油效果的影響及體系性能綜合評(píng)價(jià)結(jié)果,給出了礦場試驗(yàn)的具體方案。礦場試驗(yàn)全區(qū)和中心井采收率大幅度提高,見到了明顯的增油效果。數(shù)值模擬結(jié)果表明,扣除鉆降影響,試驗(yàn)區(qū)全區(qū)預(yù)汁最終采出程度59.25%,比水驅(qū)提高采收率5.9個(gè)百分點(diǎn)；中心區(qū)預(yù)計(jì)最終采出程度60.1%,比水驅(qū)提高采收率6.3個(gè)百分點(diǎn)。按照全區(qū)最終提高采收率5.9測算,試驗(yàn)全過程累計(jì)產(chǎn)油25.48×104t。全過程總成本23879×104元,平均噸油開采成本937.1元。礦場試驗(yàn)結(jié)果表明該技術(shù)是成功的,而且取得了較好的經(jīng)濟(jì)效益。
[Abstract]:Since 1996, the main oil layer of the main oil layer of the oil field has been put into the production of polymer flooding, and the completed partial block has achieved a better effect of 10-14% of the enhanced oil recovery, and the accumulated oil recovery reaches more than 50%. At present, in the block of the subsequent water drive, the wells with water content of more than 98% account for 43.6% of the total number of wells, all of which have been shut in due to the high water cut. The production of this part of the well results in high production liquid, high water content, low injection and production efficiency, and increased production cost. However, there are still more than 50% of the reserves in the post-drive oil layer. And the effective technology for further improving the recovery ratio is not yet further improved. The surfactant/ polymer binary composite oil displacement system has the advantages that the base is removed in the formula relative to the three-way compound drive, the viscoelasticity of the polymer can be furthest exerted, the corrosion and scaling phenomenon caused by the existence of the alkali is reduced, the ultra-low interface tension is maintained, The oil displacement effect is close to the three-way compound drive, and the environmental protection performance of the chemical oil displacement agent can be obviously improved while the production cost is reduced. Therefore, in order to explore the effective method to improve the recovery ratio after the polymer flooding, the characteristics of the alkali-free binary composite system and the study of the oil displacement effect are carried out. In this paper, a study on the properties of the binary composite system, including the rheological property, the interfacial tension and the injection capacity of the binary composite system, is studied. The effects of injection system, core permeability, polymer concentration, surfactant concentration, relative molecular weight of polymer on rheological property, interfacial tension and injection ability were analyzed. The isothermal adsorption curves of the polymer and the surfactant in the binary composite system were studied by static method. The dynamic adsorption and retention of the binary composite system were studied by using the natural core. The stability, viscosity and the effect of polymer and surfactant on the rheological properties of the oil-water interface were studied by means of the simulation of the emulsion. The effects of injection system, core permeability, polymer concentration, surface active agent concentration, relative molecular weight of polymer and core wettability on the relative permeability curve were analyzed with the theory of Darcy's law and material balance method. The effect of the average relative molecular mass, mass concentration, surfactant concentration and the change of the capillary number of the binary compound system on the oil displacement efficiency was studied by using the outcrop column core and the outcrop homogeneous long core to conduct the oil displacement experiment. Finally, the development effect and economic benefit of the field block of alkali-free binary flooding in the oil field are summarized. The results show that, with the increase of the relative molecular weight, concentration and salinity of the polymer, the viscosity of the polymer system, the first normal stress difference, the energy storage modulus and the energy dissipation modulus are increased, and the interfacial tension is increased at the same time. With the increase of the concentration of the surfactant, the viscosity of the binary composite system is obviously reduced, and then the viscosity of the system is reduced, and the interfacial tension of the system is reduced. The shear has an effect on the rheological property and the interfacial tension of the polymer system, and the parameter values are reduced. The injection capability of the binary composite system shows that the compatibility of the low molecular weight polymer and the formation is higher, and the injection capability of the binary composite system is greatly improved after the simulated shearing action. The addition of the polymer of the binary composite system and the adsorption of the surfactant on the oil sands are reduced. With the increase of the number of adsorption, the oil-water interfacial tension increased in turn. The core lipophilicity is strong, and the low permeability of the residual oil and the core can lead to the increase of the adsorption retention of the surface active agent in the core of the binary compound system. On the one hand, the stability of the emulsion of the binary composite system is to form a strong adsorption film with the viscoelastic property on the oil/ water interface by the adsorption of the polymer and the surfactant, and can effectively prevent the coalescence instability caused by the mutual collision between the liquid drops; On the other hand, due to the existence of the polymer, the viscosity of the solution is increased in the continuous phase, the chain chain of the polymer molecules is wound to form a network structure, and the free movement of the liquid drops is restrained, and the stability of the emulsion is enhanced. As the permeability is large, the core with strong hydrophilicity is high and the binary composite flooding is higher than the water drive, the effect of the polymer flooding is better, and the higher the polymer concentration, the larger the relative molecular weight of the polymer, and the better the oil displacement effect of the binary composite system. With the increase of the average molecular weight of the polymer, the mass concentration and the number of the crude pipe of the binary composite system, the oil displacement efficiency of the binary composite system is increased, and the total recovery ratio is increased. When the concentration of the surface active agent in the main section of the alkali-free binary composite system reaches 0.2% and the viscosity of the system reaches more than 30 mPa.s, the oil recovery ratio of the alkali-free binary composite system after the polymer is driven can be increased by over 10% OOIP when the system viscosity reaches more than 30 mPa.s, and the ideal effect is achieved. Based on the effect of surfactant concentration and system viscosity on the oil displacement effect and the comprehensive evaluation of the system performance, the specific scheme of the mine test is given. The recovery ratio of the whole area and the central well in the mine is greatly improved, and the obvious oil-increasing effect is seen. The results of the numerical simulation show that the final output of the pre-juice in the experimental area is 59.25%, which is 5.9 percentage points higher than that of the water drive. The final recovery of the central zone is 60.1%, which is 6.3 percentage points higher than that of the water drive. According to the final increase of EOR 5.9 in the whole region, the total production of the test is 25.48-104t. The total cost of the whole process is 23879-104 yuan, and the average ton oil production cost is 937.1 yuan. The results of the mine test show that the technology is successful and has a good economic benefit.
【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
【分類號(hào)】：TE357.46
本文編號(hào)：2449846
[Abstract]:Since 1996, the main oil layer of the main oil layer of the oil field has been put into the production of polymer flooding, and the completed partial block has achieved a better effect of 10-14% of the enhanced oil recovery, and the accumulated oil recovery reaches more than 50%. At present, in the block of the subsequent water drive, the wells with water content of more than 98% account for 43.6% of the total number of wells, all of which have been shut in due to the high water cut. The production of this part of the well results in high production liquid, high water content, low injection and production efficiency, and increased production cost. However, there are still more than 50% of the reserves in the post-drive oil layer. And the effective technology for further improving the recovery ratio is not yet further improved. The surfactant/ polymer binary composite oil displacement system has the advantages that the base is removed in the formula relative to the three-way compound drive, the viscoelasticity of the polymer can be furthest exerted, the corrosion and scaling phenomenon caused by the existence of the alkali is reduced, the ultra-low interface tension is maintained, The oil displacement effect is close to the three-way compound drive, and the environmental protection performance of the chemical oil displacement agent can be obviously improved while the production cost is reduced. Therefore, in order to explore the effective method to improve the recovery ratio after the polymer flooding, the characteristics of the alkali-free binary composite system and the study of the oil displacement effect are carried out. In this paper, a study on the properties of the binary composite system, including the rheological property, the interfacial tension and the injection capacity of the binary composite system, is studied. The effects of injection system, core permeability, polymer concentration, surfactant concentration, relative molecular weight of polymer on rheological property, interfacial tension and injection ability were analyzed. The isothermal adsorption curves of the polymer and the surfactant in the binary composite system were studied by static method. The dynamic adsorption and retention of the binary composite system were studied by using the natural core. The stability, viscosity and the effect of polymer and surfactant on the rheological properties of the oil-water interface were studied by means of the simulation of the emulsion. The effects of injection system, core permeability, polymer concentration, surface active agent concentration, relative molecular weight of polymer and core wettability on the relative permeability curve were analyzed with the theory of Darcy's law and material balance method. The effect of the average relative molecular mass, mass concentration, surfactant concentration and the change of the capillary number of the binary compound system on the oil displacement efficiency was studied by using the outcrop column core and the outcrop homogeneous long core to conduct the oil displacement experiment. Finally, the development effect and economic benefit of the field block of alkali-free binary flooding in the oil field are summarized. The results show that, with the increase of the relative molecular weight, concentration and salinity of the polymer, the viscosity of the polymer system, the first normal stress difference, the energy storage modulus and the energy dissipation modulus are increased, and the interfacial tension is increased at the same time. With the increase of the concentration of the surfactant, the viscosity of the binary composite system is obviously reduced, and then the viscosity of the system is reduced, and the interfacial tension of the system is reduced. The shear has an effect on the rheological property and the interfacial tension of the polymer system, and the parameter values are reduced. The injection capability of the binary composite system shows that the compatibility of the low molecular weight polymer and the formation is higher, and the injection capability of the binary composite system is greatly improved after the simulated shearing action. The addition of the polymer of the binary composite system and the adsorption of the surfactant on the oil sands are reduced. With the increase of the number of adsorption, the oil-water interfacial tension increased in turn. The core lipophilicity is strong, and the low permeability of the residual oil and the core can lead to the increase of the adsorption retention of the surface active agent in the core of the binary compound system. On the one hand, the stability of the emulsion of the binary composite system is to form a strong adsorption film with the viscoelastic property on the oil/ water interface by the adsorption of the polymer and the surfactant, and can effectively prevent the coalescence instability caused by the mutual collision between the liquid drops; On the other hand, due to the existence of the polymer, the viscosity of the solution is increased in the continuous phase, the chain chain of the polymer molecules is wound to form a network structure, and the free movement of the liquid drops is restrained, and the stability of the emulsion is enhanced. As the permeability is large, the core with strong hydrophilicity is high and the binary composite flooding is higher than the water drive, the effect of the polymer flooding is better, and the higher the polymer concentration, the larger the relative molecular weight of the polymer, and the better the oil displacement effect of the binary composite system. With the increase of the average molecular weight of the polymer, the mass concentration and the number of the crude pipe of the binary composite system, the oil displacement efficiency of the binary composite system is increased, and the total recovery ratio is increased. When the concentration of the surface active agent in the main section of the alkali-free binary composite system reaches 0.2% and the viscosity of the system reaches more than 30 mPa.s, the oil recovery ratio of the alkali-free binary composite system after the polymer is driven can be increased by over 10% OOIP when the system viscosity reaches more than 30 mPa.s, and the ideal effect is achieved. Based on the effect of surfactant concentration and system viscosity on the oil displacement effect and the comprehensive evaluation of the system performance, the specific scheme of the mine test is given. The recovery ratio of the whole area and the central well in the mine is greatly improved, and the obvious oil-increasing effect is seen. The results of the numerical simulation show that the final output of the pre-juice in the experimental area is 59.25%, which is 5.9 percentage points higher than that of the water drive. The final recovery of the central zone is 60.1%, which is 6.3 percentage points higher than that of the water drive. According to the final increase of EOR 5.9 in the whole region, the total production of the test is 25.48-104t. The total cost of the whole process is 23879-104 yuan, and the average ton oil production cost is 937.1 yuan. The results of the mine test show that the technology is successful and has a good economic benefit.
【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
【分類號(hào)】：TE357.46
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 董玲;張群志;李織宏;趙文強(qiáng);;表面活性劑—聚合物二元復(fù)合體系評(píng)價(jià)指標(biāo)探討[J];油氣地質(zhì)與采收率;2011年02期
2 鄂金太;;驅(qū)油用二元復(fù)合體系的性能評(píng)價(jià)研究[J];油氣田地面工程;2007年01期
3 黃榮祿;李華斌;王穎瑩;鐘意;李生福;;高30油藏二元復(fù)合體系化學(xué)劑的靜態(tài)吸附[J];石油化工應(yīng)用;2011年11期
4 孔祥濱;;二元復(fù)合體系性能評(píng)價(jià)[J];內(nèi)蒙古石油化工;2012年20期
5 王京博;史鋒剛;黃波;田津杰;張軍輝;;錦州9-3油田二元復(fù)合體系研究[J];特種油氣藏;2011年01期
6 陳念貽,溫元?jiǎng)P;二元復(fù)合氧化物的穩(wěn)定性規(guī)律[J];金屬學(xué)報(bào);1979年01期
7 常春苗;;二元復(fù)合體系乳化增溶影響因素分析[J];長江大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年04期
8 李堪運(yùn);李翠平;何玉海;齊自遠(yuǎn);安杰;;聚合物/表面活性劑二元復(fù)合體系室內(nèi)研究[J];斷塊油氣田;2011年05期
9 孫俊平,賈黎,劉禮亞,楊月玲;孤東七區(qū)西5~4-6~1二元復(fù)合試驗(yàn)區(qū)效果初步評(píng)價(jià)[J];內(nèi)江科技;2005年04期
10 張明安;;二元復(fù)合體系微觀驅(qū)油機(jī)理可視化實(shí)驗(yàn)[J];油氣地質(zhì)與采收率;2013年03期
相關(guān)會(huì)議論文 前1條
1 代亞宏;李洪生;馬艷;熊英;;二元復(fù)合體系微觀及宏觀驅(qū)油特征研究[A];提高油氣采收率技術(shù)文集[C];2009年
相關(guān)博士學(xué)位論文 前4條
1 陳剛;薩中油田無堿二元復(fù)合體系特性及驅(qū)油效果研究[D];東北石油大學(xué);2015年
2 侯天江;抗鹽聚合物的合成及其新型二元復(fù)合體系驅(qū)油性質(zhì)的研究[D];西南石油學(xué)院;2005年
3 豆照良;二元復(fù)合結(jié)構(gòu)表面形貌的制備及減阻性能研究[D];清華大學(xué);2010年
4 鄂金太;無堿二元復(fù)合體系驅(qū)油技術(shù)與經(jīng)濟(jì)可行性研究[D];中國地質(zhì)大學(xué)（北京）;2008年
相關(guān)碩士學(xué)位論文 前8條
1 宋鑫;大慶油田二元復(fù)合體系配方性能評(píng)價(jià)[D];東北石油大學(xué);2015年
2 李誠;適用于普通稠油油藏的聚/表二元復(fù)合體系研究[D];西南石油大學(xué);2014年
3 慕登慧;河南油田二元復(fù)合體系驅(qū)油效果研究[D];東北石油大學(xué);2013年
4 丁軍;二元復(fù)合體系驅(qū)油段塞優(yōu)化研究[D];吉林大學(xué);2014年
5 倪洪濤;雙河油田S/P二元復(fù)合體系驅(qū)室內(nèi)實(shí)驗(yàn)研究[D];大慶石油學(xué)院;2009年
6 楊珊珊;吉林油田聚合物/表面活性劑二元體系適應(yīng)性評(píng)價(jià)[D];東北石油大學(xué);2013年
7 明陽陽;二元復(fù)合體系乳化性能及對驅(qū)油效果的影響研究[D];東北石油大學(xué);2014年
8 陳才;渤海LD4-2油田化學(xué)驅(qū)提高采收率實(shí)驗(yàn)研究[D];東北石油大學(xué);2012年
，本文編號(hào)：2449846
本文鏈接：http://sikaile.net/kejilunwen/shiyounenyuanlunwen/2449846.html
最近更新
教材專著
