本文關(guān)鍵詞： 高溫高鹽 底水油藏 氮?dú)馀菽?壓錐　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：底水油藏開發(fā)過程中的底水錐進(jìn)問題一直阻礙著采收率的提高,嚴(yán)重時會出現(xiàn)暴性水淹,影響油井壽命。目前,氮?dú)馀菽趪鴥?nèi)外油田的壓錐工作中取得了較好的效果,但大多應(yīng)用于常規(guī)油藏。為進(jìn)一步拓展氮?dú)馀菽瓑哄F的應(yīng)用范圍,本論文針對塔河某高溫高鹽底水油藏(溫度為106～117℃,地層水礦化度為21.2×104mg/L),系統(tǒng)研究了氮?dú)馀菽呐菽阅堋⒘鞫瓤刂颇芰�、在多孔介質(zhì)中的穩(wěn)定性以及壓錐效果。 本論文采用Waring Blender方法,在100℃、現(xiàn)場注入水的條件下,通過將非離子型起泡劑與兩性離子型起泡劑復(fù)配,形成了耐溫抗鹽泡沫體系一——NL,在此基礎(chǔ)上添加穩(wěn)泡劑,形成了耐溫抗鹽強(qiáng)化泡沫體系——NLW。NL在110℃(NLW在100℃).注入水條件下的起泡體積分別為520mL和350mL,析液半衰期分別為271s和2464s；前者在110℃老化,后者在100℃老化,120d后兩者的起泡體積分別為350mL和410mL,析液半衰期均為232s,NL較NLW擁有更好的泡沫穩(wěn)定性。 通過對NL性能進(jìn)行系統(tǒng)評價發(fā)現(xiàn)：(1)適當(dāng)提高起泡劑濃度(0.1%-0.6%),有利于增加起泡體積,延長半衰期；(2)優(yōu)選出的泡沫體系具有鹽增效效應(yīng),隨著礦化度增加,半衰期不斷延長；(3)隨溫度增加,泡沫體系的起泡體積呈指數(shù)型遞增,半衰期呈多項(xiàng)式遞減,泡沫綜合指數(shù)呈多項(xiàng)式遞減；(4)隨壓力增加,泡沫體系的起泡體積呈對數(shù)遞增,半衰期呈多項(xiàng)式遞增；(5)隨原油加入量的增加,低濃度NL的起泡體積和半衰期不斷下降,提高其濃度可在一定程度上增強(qiáng)其耐油性；(6)優(yōu)選出的0.2%NL能降低原始油水界面張力,但降低幅度有限。 在120℃,現(xiàn)場注入水,回壓20MPa條件下,通過研究不同條件下耐溫抗鹽普通氮?dú)馀菽牧鞫瓤刂颇芰Πl(fā)現(xiàn),氣液比為2：1,注入速度為3.5m/d時,其流度控制能力最強(qiáng),并且?guī)r心滲透率越大,流度控制能力越強(qiáng)。通過研究氮?dú)馀菽诙嗫捉橘|(zhì)中的穩(wěn)定性發(fā)現(xiàn),隨老化時間延長,氮?dú)馀菽姆�(wěn)定性逐漸下降；原油對氮?dú)馀菽姆�(wěn)定性影響較大,相同條件下老化5d,含油狀態(tài)下殘余阻力因子的降低幅度較無油狀態(tài)下增加56.93%；高溫對強(qiáng)化泡沫穩(wěn)定性較明顯,相同條件下老化5d,其殘余阻力因子降低幅度較耐溫抗鹽泡沫增加62.03%。 制備了底水油藏氮?dú)馀菽瓑哄F模型,并利用其對氮?dú)馀菽膽?yīng)用條件進(jìn)行優(yōu)化,結(jié)果表明,氮?dú)馀菽淖⑷霑r機(jī)越早、避水高度越高,氮?dú)馀菽瓑哄F的效果越好；在生產(chǎn)井位置注入0.5PV純泡沫段塞并燜井3d,氮?dú)馀菽瓑哄F的效果越好;同時在底水推進(jìn)速度2.5-7.5m/d的范圍內(nèi),氮?dú)馀菽寄馨l(fā)揮較好的壓錐效果。 本文的研究為有助于深化對氮?dú)馀菽睦碚撜J(rèn)識,為塔河油田開展氮?dú)馀菽瓑哄F現(xiàn)場試驗(yàn)奠定了工作基礎(chǔ)。
[Abstract]:Bottom water coning of bottom water reservoir development process into the problem has hindered the improvement of recovery rate, emergence of sudden water flooding will be serious, affect the service life of the oil well. At present, the work pressure cone of nitrogen foam at home and abroad in the oil field has achieved good results, but most of them are used in the conventional reservoir. In order to further expand the scope of application of nitrogen foam pressure cone, aiming at Tahe a high temperature and high salinity reservoir (temperature of 106~117 degrees centigrade, water salinity is 21.2 * 104mg/L), the system of nitrogen foam foam properties, mobility, stability in porous medium and pressure cone effect.
This paper uses Waring Blender method at 100 degrees, water injection conditions, the nonionic foaming agent and zwitterionic compound foaming agent, forming temperature and salt resistant foam system -- NL, based on the effect of foam stabilizing agent, forming temperature and salt resistance enhanced foam system -- NLW.NL at 110 degrees C (NLW at 100 DEG C). Injection foaming volume water conditions were 520mL and 350mL, the half-life of 271s and 2464s condensate respectively; the former 110 degrees in aging, aging in the latter 100 DEG C, 120d foaming volume both were 350mL and 410mL, the half-life of condensate liquid is 232s, foam NL has better stability than NLW.
Through the systematic evaluation of the performance of NL found: (1) increasing concentration of foaming agent (0.1%-0.6%), to increase the foaming volume and prolong the half-life; (2) foam system optimized with salt effects, as salinity increased, the half-life extend continuously; (3) with the increase of temperature, the foaming volume of foam system was increasing exponentially, the half-life of a polynomial is the polynomial decline, bubble index decline; (4) with the increase of pressure, the foam foaming volume is a logarithmic increase, half-life of a polynomial increase; (5) with the increase of crude oil adding amount, foaming volume and half-life of low concentration of NL decreased continuously, increase the concentration of enhance the oil resistance to a certain extent; (6) the optimized 0.2%NL can reduce the original oil-water interfacial tension, but the decrease is limited.
At 120 degrees C, injection water, back pressure under the condition of 20MPa, through research under different conditions of temperature and salt resistance of ordinary nitrogen foam mobility, gas-liquid ratio is 2:1, the injection rate is 3.5m/d, the mobility control ability is the strongest, and the greater the core permeability, mobility control ability is stronger. By nitrogen study on the stability of foam in porous medium, with aging time prolonged, the stability of nitrogen foam decreased gradually; crude oil on the stability of nitrogen foam greatly influence the aging of 5D under the same conditions, reducing the low residual resistance factor of oil under the condition of less oil increased by 56.93% under the condition of high temperature; to strengthen the foam stability is obvious, the same under the condition of aging 5D, the residual resistance factor decreased compared with temperature and salt resistant foam increased 62.03%.
Preparation of nitrogen foam reservoir with bottom water coning model, and the use of nitrogen foam application conditions were optimized. The results show that the nitrogen foam injection in early stage, the height of water avoidance is higher, the better the effect of nitrogen foam pressure cone; in the production well into the 0.5PV position of pure foam slug and soak 3D, the better the effect of nitrogen foam pressure cone; at the same time promote the speed of 2.5-7.5m/d within the range of water, nitrogen foam can exert pressure cone better effect.
The research in this paper is helpful to deepen the theoretical understanding of nitrogen foam and lay a foundation for the field test of nitrogen foam cone in Tahe oilfield.

【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.46

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 王增林,王其偉;強(qiáng)化泡沫驅(qū)油體系性能研究[J];石油大學(xué)學(xué)報(bào)(自然科學(xué)版);2004年03期

2 李兆敏;孫茂盛;林日億;李勇;徐永輝;;泡沫封堵及選擇性分流實(shí)驗(yàn)研究[J];石油學(xué)報(bào);2007年04期

3 龐占喜;程林松;陳月飛;廖廣志;;常規(guī)稠油底水油藏氮?dú)馀菽刂扑F技術(shù)研究[J];石油學(xué)報(bào);2007年05期

4 羊爭鳴，張建，趙郭平;一個實(shí)用的注蒸汽加泡沫過程的油藏?cái)?shù)值模型[J];石油學(xué)報(bào);1994年02期

5 余華杰;程林松;林淑華;;水平井開采底水油藏氮?dú)馀菽瓑核辜夹g(shù)研究[J];新疆石油科技;2009年02期

6 李治龍,錢武鼎;我國油田泡沫流體應(yīng)用綜述[J];石油鉆采工藝;1993年06期

7 王其偉,郭平,周國華,李向良,李雪松;泡沫體系封堵性能影響因素實(shí)驗(yàn)研究[J];特種油氣藏;2003年03期

8 聶彬;劉月田;楊海寧;;歡17塊底水油藏水錐起降規(guī)律影響因素研究[J];特種油氣藏;2012年04期

9 梁丹;曾祥林;房茂軍;;關(guān)井壓錐控制底水錐進(jìn)效果分析[J];石油鉆探技術(shù);2012年06期

，

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