奈1块地质特征及深部调驱技术研究

发布时间：2018-02-06 05:59

  本文关键词： 构造 油藏类型 调驱 可动凝胶 配方筛选 提高采收率　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：本论文针对奈1块井区存在的地质问题,对该井区进行地质特征研究,利用该区已有的钻井、录井、测井、地震及生产资料,开展构造、储层、沉积、油气分布规律等综合地质研究,发现制约油藏开发的主要问题。奈1块是高效水驱开发区块,目前处于水驱开发后期,油藏含水率较高,同时受到区块含油层系多,层间层内非均质性强,原油粘度大等油藏特征影响,油藏开发矛盾突出,仅靠常规水驱采收率难以大幅提高,区块稳产难度增大,为寻找一种适合于该区块油藏特点的提高采收率技术,延缓区块产量递减,缓和油藏开发矛盾,为油田开发提供理论指导和方案设计。本论文取得的主要认识与成果有:(1)利用较稳定的对比标志层,对工区主力目的层九佛堂组上、下两段地层划分为6个油层组,14个砂岩组。(2)本区断裂发育,主要发育一组北东向正断层和一组南北向正断层。北东向断层和南北向断层相互切割,早期为油气的运移通道,构造成型后,对油气有很好的封堵作用。断裂和构造具有长期活动,继承性较强的特点,各反射层构造形态、断裂特征基本一致,早期为一半背斜形态,晚期被断层切割成4个断鼻和断块构造。(3)在综合沉积背景、沉积相标志的基础上建立该区块目的层的扇三角洲沉积模式和微相划分,以油层组为单元编制沉积相平面图并进行了沉积演化分析。(4)以油层组为单元进行了砂体发育及平面分布特征研究。奈1区块九佛堂组上、下两段油层发育、厚度大,平面上奈1-60-46块最好,面积大。依次为奈1-48-38块、奈1-68-32块和奈1-42-26块。总的特点,各断块高部位油层厚度大,向低部位逐渐减薄。纵向上九上段Ⅰ、Ⅲ油层组最发育,其次为Ⅱ油层组,Ⅳ油层组较差,九下段Ⅰ油层组好于Ⅱ油层组。控制油水分布的主要因素是构造、沉积相带等,油藏类型为层状边水岩性构造油藏。(5)开展区块深部调驱先导试验,在分析奈曼油田特点的基础上,结合深部调剖实验结果,确定了该油田深部调剖体系的类型;推荐体系:0.2%P2000+0.2%JL-5,封堵效率为99.96%,能够提高采收率14.34%。通过深部调驱现场实施,试验区见到了明显的降水效果,表明设计的深部调驱体系对奈曼油田深部调驱试验区具有良好的适应性。
[Abstract]:In view of the geological problems existing in Nai 1 well area, this paper studies the geological characteristics of this well area, using the existing drilling, logging, logging, seismic and production data to develop structure, reservoir and sedimentation. Comprehensive geological research, such as oil and gas distribution, found that the main problems restricting reservoir development. Block Nai 1 is a high efficiency water drive development block, which is currently in the late stage of water drive development, and the reservoir water cut is relatively high. At the same time, affected by the reservoir characteristics, such as more oil-bearing layers, strong heterogeneity in interlayer, large viscosity of crude oil, the contradiction of reservoir development is prominent, and it is difficult to improve oil recovery by conventional water flooding, and increase the difficulty of stable production in the block. In order to find a kind of oil recovery technology suitable for the reservoir characteristics of the block, delay the decline of production in the block and ease the contradiction of reservoir development. To provide theoretical guidance and scheme design for oil field development. The main knowledge and results obtained in this paper are: 1) using relatively stable contrast marker layer, the main target layer of the work area is Jiu Futang formation. The next two strata are divided into 6 reservoirs and 14 sandstone formations.) faults are developed in this area, mainly a group of NNE normal faults and a group of NNE normal faults. NNE faults and NNE faults cut each other. Early oil and gas migration passage, the formation of the structure has a good plugging effect on oil and gas. Faults and structures have long-term activity, strong inheritance characteristics, the structural morphology of each reflection layer, fracture characteristics are basically the same. It was half anticline in the early stage and was cut into 4 fault nose and fault block structures in the late stage in the integrated sedimentary background. The fan-delta sedimentary model and microfacies division of the target layer of the block are established on the basis of sedimentary facies marks. Taking the reservoir as the unit, the sedimentary facies plane map is compiled and the sedimentary evolution analysis is carried out. 4) the sand body development and plane distribution characteristics are studied with the oil reservoir formation as the unit. In the Jiufutang formation of the Nai 1 block, the sand body development and the plane distribution characteristics are studied. The oil layers of the next two sections are well developed with a large thickness, the best and large area of Nai 1-60-46 on the plane, followed by Nai 1-48-38, Nai 1-68-32 and Nai 1-42-26. The thickness of the oil layer in the high part of each fault block is large and gradually thinning down to the lower part. The formation of 鈪，

本文编号：1493751