水下分流河道岔口剩余油富集特征——以濮城油田南区沙二下为例
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摘要
国内老油田经过长期注水开发后大部分已进入高含水开发后期,大量剩余油受储层强非均质性的影响富集在某些区域,形成的剩余油类型复杂多样。本文主要针对湖泊三角洲前缘水下分流河道岔口这一剩余油富集有利区进行研究,结合濮城油田南区沙二下油藏实践开发效果,研究分析出河道岔口的剩余油富集特征:(1)砂体厚度相对较大,沿分支河道两侧呈"中间薄、两边厚"延伸;(2)河道岔口砂体内发育薄夹层,延展范围较短;(3)河道岔口累积水油比越小,剩余油富集程度相对越高。
Most domestic mature oilfields have stepped into the later development period with super-high water-cut, bringing up complicated and various remaining oil, which were enriched in some potential regions because of strong reservoir heterogeneity. The research focus on remaining oil enrichment characteristic in channel fork, based on distributary channel fork of Lake Delta front, which are the potential regions, combined with development effect of Pucheng oilfield south district Sha 2. The result shows that,(1)Sand thickness is quite big and spread along the sides of distributary channel with characters of thick in the middle and thin in the both sides.(2)Short laps grow in channel fork sand with a short extension.(3)The smaller the cumulative water-oil ratio in channel fork, the higher potential of remaining oil.
Most domestic mature oilfields have stepped into the later development period with super-high water-cut, bringing up complicated and various remaining oil, which were enriched in some potential regions because of strong reservoir heterogeneity. The research focus on remaining oil enrichment characteristic in channel fork, based on distributary channel fork of Lake Delta front, which are the potential regions, combined with development effect of Pucheng oilfield south district Sha 2. The result shows that,(1)Sand thickness is quite big and spread along the sides of distributary channel with characters of thick in the middle and thin in the both sides.(2)Short laps grow in channel fork sand with a short extension.(3)The smaller the cumulative water-oil ratio in channel fork, the higher potential of remaining oil.
引文
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[14]孙雨,董毅明,王继平,等.松辽盆地红岗北地区扶余油层储层单砂体分布模式[J].岩性油气藏,2016,28(4):9-15.
[2]胡永乐,王燕灵,杨思玉,贾文瑞.注水油田高含水后期开发技术方针的调整[J].石油学报,2004,25(5):65-69.
[3]李阳,王端平,等.陆相水驱油藏剩余油富集区研究[J].石油勘探与开发,2005,32(3):91-96.
[4]朱丽红,杜庆龙,姜雪岩,等.陆相多层砂岩油藏特高含水期三大矛盾特征及对策[J].石油学报,2015,36(2):201-216.
[5]俞启泰.注水油藏大尺度未波及剩余油的三大富集区[J].石油学报,2000,21(2):45-50.
[6]杜庆龙,王元庆,朱丽红,等.不同规模地质体剩余油的形成与分布研究[J].石油勘探与开发,2004,31(S1):95-99.
[7]吕坐彬,赵春明,霍春亮,等.精细相控储层地质建模技术在老油田调整挖潜中的应用—以绥中36-1油田为例[J].岩性油气藏,2010,22(3):100-105.
[8]刘文岭,韩大匡,胡水清,等.高含水油田发展油藏地球物理技术的思考与实践[J].石油学报,2009,30(4):550-554+559.
[9]朱志良,熊迪,岳渊洲,等.克拉玛依油田一东区克拉玛依组沉积相与剩余油分布关系研究[J].岩性油气藏,2013,25(3):112-118.
[10]李秋实,李学森,张卫刚.一个典型的水下分流河道砂体展布与油气富集规律[J].西北地质,2003,63(4):68-73.
[11]林承焰,余成林,董春梅,等.老油田剩余油分布—水下分流河道岔道口剩余油富集[J].石油学报,2011,32(5):829-835.
[12]姚光庆,马正,赵彦超,等.浅水三角洲分流河道砂体储层特征[J].石油学报,1995,16(1):24-31.
[13]俞启泰,赵明,林志芳.水驱砂岩油田含水率变化规律与采收率多因素分析[J].石油勘探与开发,1992,19(3):63-68.
[14]孙雨,董毅明,王继平,等.松辽盆地红岗北地区扶余油层储层单砂体分布模式[J].岩性油气藏,2016,28(4):9-15.