喇嘛甸油田北北块河流相储层流动单元划分
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摘要
随着油田的不断开发，我国东部许多老油田已进入高含水期开采阶段，保持油气产量的稳定面临严竣的挑战，而高含水油田稳产的关键取决于对剩余油分布的认识程度。八十年代以来，随着对储层流动单元研究的不断深入，它越来越广泛地被应到油藏描述和剩余油研究中来，流动单元研究对于认识储层的非均质性、提高油藏描述精度、搞清剩余油分布具有重要的理论意义和实际意义。
首先，本文以喇嘛甸油田北北块聚合物驱井网葡I1-2砂岩组为研究目的层，应用储层建筑结构解剖的知识和河流-三角洲相油层对比方法，绘制了各沉积单元的沉积相带图，为平面流动单元的划分提供了地质基础，同时，划分了垂向流动单元。
在划分平面流动单元的多种方法中，经过对比，发现灰色关联法划分的流动单元不但能体现成因特征，而且能较好的与生产动态相吻合，所以选用了灰色关联法作为划分平面流动单元的最佳方法。用此法把研究区储层划分为A、B、C、D四种不同类型的流动单元，并提出了平面流动单元有三种分布形式：独立分布型、平面联合型、垂向复合型。
在流动单元划分基础上，对研究区储层的非均质性进行了详细的描述。
结合油藏工程方法，对剩余油在不同流动单元的分布以及同一流动单元不同部位的分布规律进行了研究，揭示了流动单元与剩余油分布的内在联系，总结了研究区剩余油的分布形式，提出了相应挖潜方法，在生产实践中取得了显著的应用效果，有力地验证了流动单元划分的正确性。
With the development of oil fields,many old reservoirs in the east of China enter the high water-bearing development period.Sustaining a high and stable production rate faces severe challenge .The key to preserve oil output in high water cut period is dependent upon the understanding degree to the properties of residual oil distribution.From 1980's,while the study of the reservoir flow unit was proceeded alongside,it has been more widely utilized to characterize reservoir feature and remnant oil distribution .Study of reservoir flow unit plays.both theoretically and practically.an important role in recognizing reservoir heterogeneity.performing a high-definition reservoir delineation and understanding the distribution of the remnant oil in the reservoir.
Regarding PI1-2 oil bearing group in the polymer flooding well pattern in the north part of the north section in Lamodian Oil Field, as the target pay zone, this paper has firstly drawn the sedimentary microfacies maps of each time unit by means of the principle of architecture-element analysis and correlation method of sand member in fluvial-delta depositional system.lt gives a sound geological foundation for classification of plane flow unit.At the same time, this paper has classified vertical flow unit.
Among many methods of classifing plane flow unit ,the author find that the flow unit classified by Grey Association Method not only reveal cause of formation.but also better inosculate with production performance by contrast.So the author select the Grey Association Method as the best method to classifing plane flow unit.By it the target beds in this area are divided into four types of flow unit.they are A type,B type.C type and D type. The author put forward three types of plane flow unit distribution,they are isolated distribution type.plane combination type.profile compound type.
On the basis of classifing flow unit,the heterogeneity of reservoir is particularly described in study area.
Combining reservoir engineering methods, the distribution laws of remaining oil in different types,or in different part of flow unit are studied. The author reveals the relationship between flow unit and remaining oil distribution.and summarizes the types of remaining oil distribution in study area,and gives the corresponding measures of tapping potential .Good results have been yielded in practice,so this convincingly validates the classification of flow unit.
首先，本文以喇嘛甸油田北北块聚合物驱井网葡I1-2砂岩组为研究目的层，应用储层建筑结构解剖的知识和河流-三角洲相油层对比方法，绘制了各沉积单元的沉积相带图，为平面流动单元的划分提供了地质基础，同时，划分了垂向流动单元。
在划分平面流动单元的多种方法中，经过对比，发现灰色关联法划分的流动单元不但能体现成因特征，而且能较好的与生产动态相吻合，所以选用了灰色关联法作为划分平面流动单元的最佳方法。用此法把研究区储层划分为A、B、C、D四种不同类型的流动单元，并提出了平面流动单元有三种分布形式：独立分布型、平面联合型、垂向复合型。
在流动单元划分基础上，对研究区储层的非均质性进行了详细的描述。
结合油藏工程方法，对剩余油在不同流动单元的分布以及同一流动单元不同部位的分布规律进行了研究，揭示了流动单元与剩余油分布的内在联系，总结了研究区剩余油的分布形式，提出了相应挖潜方法，在生产实践中取得了显著的应用效果，有力地验证了流动单元划分的正确性。
With the development of oil fields,many old reservoirs in the east of China enter the high water-bearing development period.Sustaining a high and stable production rate faces severe challenge .The key to preserve oil output in high water cut period is dependent upon the understanding degree to the properties of residual oil distribution.From 1980's,while the study of the reservoir flow unit was proceeded alongside,it has been more widely utilized to characterize reservoir feature and remnant oil distribution .Study of reservoir flow unit plays.both theoretically and practically.an important role in recognizing reservoir heterogeneity.performing a high-definition reservoir delineation and understanding the distribution of the remnant oil in the reservoir.
Regarding PI1-2 oil bearing group in the polymer flooding well pattern in the north part of the north section in Lamodian Oil Field, as the target pay zone, this paper has firstly drawn the sedimentary microfacies maps of each time unit by means of the principle of architecture-element analysis and correlation method of sand member in fluvial-delta depositional system.lt gives a sound geological foundation for classification of plane flow unit.At the same time, this paper has classified vertical flow unit.
Among many methods of classifing plane flow unit ,the author find that the flow unit classified by Grey Association Method not only reveal cause of formation.but also better inosculate with production performance by contrast.So the author select the Grey Association Method as the best method to classifing plane flow unit.By it the target beds in this area are divided into four types of flow unit.they are A type,B type.C type and D type. The author put forward three types of plane flow unit distribution,they are isolated distribution type.plane combination type.profile compound type.
On the basis of classifing flow unit,the heterogeneity of reservoir is particularly described in study area.
Combining reservoir engineering methods, the distribution laws of remaining oil in different types,or in different part of flow unit are studied. The author reveals the relationship between flow unit and remaining oil distribution.and summarizes the types of remaining oil distribution in study area,and gives the corresponding measures of tapping potential .Good results have been yielded in practice,so this convincingly validates the classification of flow unit.
引文
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[6] Ebanks W J Jr. Flow unit concept—integrated approach to reservoir description for engineering projects. AAPG Annual Meeting, AAPG Bulletin, 1987, 71 (5), 551～552
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[29] 俞启泰．论提高油田采收率的战略与方法．石油学报．1996，17(2)．53～61
[30] 肖鸿雁等．储层微型构造与剩余油分布关系研究．断块油气田．2003，10(4)，8～11
[31] 付国民等．家川油田河流相储层砂体非均质模型及剩余油分布．长安大学学报(地球科学版)．2003，25(1)．15～19
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