【作者】 李玉梅；

【导师】 陈开远；

【作者基本信息】 中国地质大学（北京） ， 油气田开发工程， 2011， 博士

【摘要】 朝5北井区位于朝阳沟油田的背斜轴部,是一个受断层、构造、岩性多种因素控制的复合型特低渗透油藏,主要开采目的层为扶余油层,储层物性较差,平均空气渗透率5~30×10-3μm2,油井的自然产能低。储层发育近东西向的高角度裂缝,裂缝的延伸方向和发育程度对该区油井的产能和注水效果产生决定性的影响。朝5北井区注水开发后,在裂缝方向的油井见水早,含水上升快,裂缝不发育的油井受效差、产量递减快。为了进一步提高朝5北井区的开发效果,开展了朝5北井区裂缝建模、数模、剩余油定量评价及综合挖潜技术研究。影响裂缝发育的地质因素很多,各种因素互相作用,使得描述和预测裂缝发育的难度较大。本文在调研国内外裂缝性储层建模、数模及开发技术现状的基础上,通过对朝5北井区裂缝分布规律研究、断裂系统识别、古挠曲度分析及断层距离分析以及测井裂缝解释等裂缝综合研究,建立了目标区块的裂缝强度属性模型及裂缝网络模型;通过分小层的数值模拟,对朝5北井区裂缝性油藏剩余油从平面、纵向两方面进行了定量评价,分析了下步调整的潜力和主攻方向,并提出了稳油控水综合治理的对策。取得的创新性研究成果:1、建立了能够反映储层实际裂缝发育及分布规律的裂缝模型。应用现场岩心分析资料、单井测井解释资料对朝5北井区裂缝参数及发育规律进行描述。朝5北井区所有小层裂缝均呈近东西向的条带状展布,裂缝发育多在断层两侧或两条断层的中间附近,不同区域裂缝的发育差异大,裂缝发育条数从1条到14条不等。从单井裂缝平面分布看,裂缝明显呈东西向发育,且井区北部裂缝比南部发育。裂缝描述结果与生产动态分析结果吻合较好,生产动态数据表明:注水井排的油井沿东西向普遍水淹,裂缝发育区水串严重、含水高,井区北部含水、采出程度比南部高。2、利用辅助历史拟合及Petrel Re水力压裂技术提高数值模拟拟合精度,对朝5北井区剩余油的影响因素进行分析,并对剩余油进行定量定性综合评价。剩余油的分布与裂缝的发育方向和发育程度有密切的关系。裂缝发育区剩余油饱和度低,整体上看,剩余油饱和度低的区域呈东西向分布,且北部比南部低。剩余油饱和度高的区域主要分布在油层边部、现井网控制不到的区域和裂缝不发育区域。3、结合现场生产动态资料,根据区域裂缝展布及走向、现井网与裂缝发育的关系,开展了以周期注水开采理论为基础的综合挖潜措施对策研究。预计通过综合调整,全区综合含水由68.5%降低到60.4%,采收率提高1.44个百分点。更多还原

【Abstract】 Content: Located at five north area aangonghe horizons of anticline axis chaoyang gou oilfield, the development of the problems existing in the direction of crack is water breakthrough early, water rising fast, cracks not development by effect is bad, oil production declining fast. In order to further enhance the development of the north chao 5 blocks, and carried out the effect of the north chao 5 blocks crack modeling, mathematical model, the quantitative evaluation and comprehensive redevelopment remaining technological research.Based on the research domestic and international fractured reservoir modeling, mathematical model and development technology, based on the status quo of the north chao 5 blocks horizons through research, fault fracture distribution system identification, ancient buckling degrees analysis and fault distance analysis and logging crack interpretation, a comprehensive study cracks of crack strength attribute target block model and crack network model. Through numerical simulation in small layer in the north chao 5 blocks, fractured reservoir of remaining oil from plane, longitudinal from two aspects, analyzes the quantitative evaluation under the potential and adjust the main direction of steady oil, and puts forward the countermeasures of water control comprehensive governance. Get creative research results:1, established can reflect the actual fracture development and reservoir distribution laws of crack model.Using the site core analysis data, single well logging interpretation material toward the north chao 5 blocks fracture parameters and growth rule was described. the fractures of the north chao 5 blocks are all small sinkiang.distributed at east-west a ribbon exhibition cloth, fracture development on both sides or two in fault fault, different area near the middle of cracks in the development of big differences, fracture development from 1 the number to 14 dollars. From single well crack planar distribution look, cracks, and obviously was like development in northern area aangonghe horizons southern fractured than growth. Crack description result and production results agree well with the dynamic analysis, the dynamic data suggest that the production of injection Wells row of water flooding along the east-west common Wells, fracture development area of high water-bearing seriously, water cut, recovery degree in northern area aangonghe horizons than southern high.2, Use auxiliary historical fitting and Petrel Re hydraulic fracturing numerical simulation technology improve the fitting precision, for the remaining the north chao 5 blocks the influential factors were analyzed, and the remaining oil quantitatively and qualitatively comprehensive evaluation.The distribution of remaining oil and crack development direction and the development degree have close relationship. Fracture development area of remaining oil saturation, the overall look, low residual oil saturation in low areas of northern distribution and the east-west than southern low. Areas of high residual oil saturation mainly distributed in reservoir of edge, now can’t well spacing control areas and crack not development area.3, Combining with the production dynamic material, according to its regional crack exhibition cloth and towards, is now well nets and fracture development relations, was carried out based on the theory of water cycle of comprehensive exploitation potentialities measures countermeasures study.Through comprehensive adjustment, the expected by comprehensive water cut, oil recovery reduced to 68.5% 60.4% least 1.44 percentage point increase.更多还原