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style="text-indent:2em;">三次采æÑa˜qœä¸åŒäºŽäºŒæ¬¡é‡‡æÑa。二‹Æ¡é‡‡æ²ÒŽ˜¯ä¾é äººå·¥è¡¥å……油层能量的物理作用提高采收率åQ?而三‹Æ¡é‡‡æ²ÒŽ–¹æ³•æ˜¯åœ¨æ³¨æ°´ä¿æŒæÑa层压力基¼‹€ä¸Šï¼Œåˆä¾é æ³¨å…¥å¤§é‡æ–°çš„驱油剂åQŒæ”¹å˜æµä½“粘度、组分和相态,å…ähœ‰ç‰©ç†åŒ–学的双重作用,不仅˜q›ä¸€æ­¥æ‰©å¤§äº†æ³¨å…¥æ°´æ‡L及范å›ß_¼Œè€Œä¸”使分散的、束¾~šåœ¨æ¯›ç»†½Ž¡ä¸­çš„残余æÑa重新聚集而被采出。因此,三次采æÑa要求更精¾l†åœ°æŽŒæ¡åˆ†æ•£åŽŸæÑa在地下æÑa层中的分å¸?研究新的驱æÑa剂与十分复杂的岩石矿物、流体的物理-化学作用;探烦òq¶æŽŒæ¡éžç‰›é¡¿‹¹ä½“多相渗流的基本规律。从而正¼‹®åˆç†åœ°˜q›è¡Œæ²¹ç”°å¼€å‘部¾|œy€”—井¾|‘、井距、层¾pÕdˆ’分、注采关¾p…R€æ³¨é‡‡å·¥è‰ºã€åŠ¨æ€ç›‘‹¹‹ã€ç›¸åº”的地面集输¾pȝ»Ÿå’Œå‡€åŒ–处理等。æ€ÖM¹‹åQŒä¸€æ•´å¥—技术都ž®†éšç€ä¸‰æ¬¡é‡‡æÑa技术的应用而发生变化。æÑa田开发要建立在更òq¿æ³›çš„多学科¾l¼åˆåº”用基础上,从宏观和微观上更深化对地下流体渗‹¹çš„认识采æÑaåQŒä¸‰‹Æ¡é‡‡æ²¹è¿œä¸åŒäºŽäºŒ‹Æ¡é‡‡æ²ÒŽ·±åŒ–对油田的认识。三‹Æ¡é‡‡æ²¹å°†æŠŠæÑa田开发带入一个更高技术水òq³çš„新阶ŒDüc€?/p><p style="text-indent:2em;"> <span style="color:#ff0000;">˜q™ç¯‡æ–‡ç« æ‚¨æˆ–许更喜欢åQ?/span> </p><p style="text-indent:2em;">热力é©×ƒ¸‰‹Æ¡é‡‡æ²ÒŽŠ€æœ?/p><p style="text-indent:2em;">热力采æÑa包括注蒸æ±?蒸汽吞吐和蒸汽驱两种工艺)、火烧æÑa层和热化学采沏V€‚注蒸汽和火烧æÑa层都是利用热量加热æÑa层和油层中的‹¹ä½“åQŒé™ä½ŽåŽŸæ²¹ç²˜åº¦æ¥è¾‘Öˆ°å‡å°æ²¹å±‚‹¹åŠ¨é˜ÕdŠ›çš„目的。所不同的是蒸汽是在地面上的蒸汽发生å™?又称热采锅炉)中äñ”生,通过地面½Ž¡é“å’ŒæÑa井注入æÑa层,而火烧æÑa层热量则是在含æÑa岩层内部产生åQŒå› è€Œä¹Ÿ¿UîCؓž®±åœ°åŠ çƒ­æˆ–燃烧过½E‹ã€‚这是按产生热量的方式或地点而区分的ã€?/p><p style="text-indent:2em;">如果按注采工艺区分,可把热采分äؓ热驱(thermal drive)和热力激励或增äñ”(thermal stimulation)两类。所谓热驱,是将热流体连¾l­åœ°æ³¨å…¥ä¸€å£äº•æˆ–几口井驱替原æÑaåQŒä»Žå…¶å®ƒäº•äñ”油三‹Æ¡é‡‡æ²V€‚热力驱三次采æÑa技术维持热‹¹ä½“注入所需的压力会加快原æÑa的流动,也增大æÑa藏中的驱动力åQŒå› æ­¤ï¼Œçƒ­é©±ä¸ä»…由温度升高而降低流动阻力,而且为增加流量供¾l™åŠ¨åŠ›ã€‚消耗热量多åQŒä½†èƒ½èŽ·å¾—较高的最¾lˆé‡‡æ”¶çŽ‡ã€‚注蒸汽的热é©Þq§°ä¸ø™’¸æ±½é©±åQŒæ³¨½Iºæ°”火烧油层的热é©Þq§°ä¸ºç«é©±ã€‚热力激励或增äñ”只是加热井筒附近的æÑa层。一旦这部分油层内原æ²ÒŽµåŠ¨é˜»åŠ›é™ä½Žï¼Œè¾ƒè¿œå¤„æÑa层内的驱动力åQŒå¦‚重力驱、溶解气驱和天然水驱åQŒå°±èƒ½å¼•èµ¯‚¯¥äº•äñ”沚w€Ÿåº¦çš„增加。注蒸汽的热力激åŠÞq§°ä¸ø™’¸æ±½åžå?steam huff puff)åQŒè’¸æ±½æµ¸æ³?steam soak)或åó@环注蒸汽(cyclic steam 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