高含水期多层油藏注水层段划分方法
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摘要
多层合采的断块油藏进入高含水期之后,纵向动用程度差异大,层间矛盾突出。分层注水技术能够改善层间矛盾,促进注入水的均衡驱替,而注水层段的合理划分是提高分层注水效果的关键。文中给出了一套分层注水井注水层段的合理划分方法,并编写了计算程序。该方法提出采用各小层吸水指数为注水层段划分的依据指标,建立了层段划分的政策界限;基于各注水层段内吸水指数级差最小化的原则,在满足吸水指数级差相应的政策界限的前提下,应用枚举算法(插板法)进行注水层段的合理划分。通过东辛油田实例验证了此方法能有效降低含水率,改善高含水期油藏注水开发的效果。
Great difference of vertical utilization degree and the interlayer contradiction exist in multiplayer producing block reservoir with high water cut. Separate layer water injection is able to achieve balanced displacement by reducing the contradiction between layers, and the reasonable division of the water injection intervals is the key to improve the effect of separate layer water injection. In this paper, a set of reasonable dividing method of the water injection intervals is proposed and the calculation program is established. This method takes water injection index as the standard of interval division of each layer, and the policy limits of the division of intervals is established. Based on the principle of minimizing the differential of water injection index, the method of enumeration algorithm(fill-in method) is used to divide the water injection intervals to ensure that differential of water injection index to meet the corresponding policy limits. This method is efficient to reduce the water cut and improve the effect of water injection, which is also verified by practical example.
Great difference of vertical utilization degree and the interlayer contradiction exist in multiplayer producing block reservoir with high water cut. Separate layer water injection is able to achieve balanced displacement by reducing the contradiction between layers, and the reasonable division of the water injection intervals is the key to improve the effect of separate layer water injection. In this paper, a set of reasonable dividing method of the water injection intervals is proposed and the calculation program is established. This method takes water injection index as the standard of interval division of each layer, and the policy limits of the division of intervals is established. Based on the principle of minimizing the differential of water injection index, the method of enumeration algorithm(fill-in method) is used to divide the water injection intervals to ensure that differential of water injection index to meet the corresponding policy limits. This method is efficient to reduce the water cut and improve the effect of water injection, which is also verified by practical example.
引文
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[15]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):210-216.
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[18]张琪,万仁溥.采油工程方案设计[M].北京:石油工业出版社,2002:112-119.
[2]刘合,裴晓寒,罗凯,等.中国油气田开发分层注水工艺技术现状与发展趋势[J].石油勘探与开发,2013,40(6):733-737.
[3]韩大匡.准确预测剩余油相对富集区提高油田注水采收率研究[J].石油学报,2007,28(2):73-78.
[4]于会利,汪卫国,荣娜,等.胜坨油田不同含水期层间干扰规律[J].油气地质与采收率,2006,13(4):71-73.
[5]贾爱林,郭建林.智能化油气田建设关键技术与认识[J].石油勘探与开发,2012,39(1):118-122.
[6]黄爱先.多层油藏均衡开采影响因素分析[J].断块油气田,2015,22(1):70-73.
[7]裴承河,陈守民,陈军斌.分层注水技术在长6油藏开发中的应用[J].西安石油大学学报(自然科学版),2006,21(2):33-36.
[8]黄伏生,赵永胜.高含水期砂岩油田细分注水最佳分级模拟研究[J].大庆石油地质与开发,1998,17(2):30-31.
[9]黄学峰,李敬功,吴长虹,等.注水井分层累计吸水量动态劈分方法[J].测井技术,2004,28(5):465-467.
[10]石晓渠,马道祥.注水井合理配注水量计算方法研究[J].西部探矿工程,2008,20(9):94-96.
[11]周琦,姜汉桥,李志刚,等.利用吸水剖面测试资料优化分层注水措施[J].油气井测试,2009,18(3):11-15.
[12]杨坤.杏北开发区特高含水期分层注水技术政策及方法研究[D].大庆:东北石油大学,2013.
[13]李才学,沈曦,贾卫平,等.高含水期油藏液流方向优化及流线模拟[J].断块油气田,2015,22(5):641-646.
[14]姜汉桥,姚军,姜瑞忠.油藏工程原理与方法[M].东营:中国石油大学出版社,2006:235-245.
[15]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):210-216.
[16]宋永.关于非均质油层吸水能力影响因素的研究[J].大庆石油地质与开发,1985,4(2):33-39.
[17]柴世超.绥中36 1油田试验区注水井吸水能力分析及稠油油田注水模式初探[J].中国海上油气,2004,16(1):29-31.
[18]张琪,万仁溥.采油工程方案设计[M].北京:石油工业出版社,2002:112-119.