古龙油田油水分布规律研究

发布时间：2018-01-03 03:04

本文关键词：古龙油田油水分布规律研究　出处：《东北石油大学》2016年博士论文　论文类型：学位论文

【摘要】：对于油藏分布规律复杂的古龙油田而言,准确的预测油田的油水的分布情况,是保证油田稳定产量、提高采收率的核心问题。受岩性和构造双重影响,工区油水分布呈现“油水同层、上油下水、上水下油、油水层互间”等特征,联合各种手段刻画微幅度构造,进行沉积微相、油气成藏条件等研究,是提高古龙油田葡萄花油层油藏的油水分布规律认识精度,发现有利区块及布置有利井位的关键。研究区主要为岩性油藏,其次为构造-岩性复合油藏,含油层位主要为葡萄花一段,其岩性在纵、横向上变化快,油层分布在空间上不稳定。在古龙油田的不断勘探开发过程中,逐渐暴露出该区的砂体沉积和油水关系十分复杂,在原有探明储量基础上直接进行开发风险性极大,急需准确认识该区块小层砂体分布、储层物性变化、油水分布情况。本论文以古龙油田葡萄花油层为重点研究区,开展油藏的井震联合刻画方法研究,在测井资料标准化、井震联合地质层位标定基础上,通过高分辨率层序地层划分与对比、多方法刻画微幅度构造、分层分手段刻画不同规模河道砂体,分层分手段研究油水分布及油藏类型,确定古龙油田葡萄花油层内微构造,合理、准确地搞清了砂体展布特征和分布规律,精细研究成藏主控因素对油水分布的影响,形成古龙油田葡萄花油层精细地质研究流程,有效指导有利区块的确定及有利井部署。取得的主要成果如下：1.利用录井、测井、地震等信息,开展葡萄花油层高分辨率层序地层学研究,进行了古龙油田葡萄花油层基准面旋回识别,建立了研究区高分辨率等时层序格架,得出葡萄花油层垂向上整体为水体先逐渐变浅—水退最大—水体加深—萨葡夹层水体达到相对最大的过程的结论。地层从东到西逐渐减薄。2.利用维水平切片对微构造一一落实,小网格小等值线间距(一般1m)成图。联合应用构造趋势面分析等技术,有效地发现了构造幅度小于5m的微幅度构造。共发现160个微幅度构造。3.利用SGR断层封闭性评价方法,得出工区断层封闭性好古60%以上,中等在40%-60%之间,差不到40%。4.在高分辨率层序地层划分与对比基础上,结合前人研究成果,对沉积体系、物源方向、沉积特征、沉积相、砂体类型、沉积模式等进行研究,并充分结合地震属性成果,最终确定了研究区砂体空间展布。5.详细剖析古龙油田葡萄花油层垂向、平面油水分布特征。划分了葡萄花油层油藏类型,确定了各油藏类型的形成及分布规律。6.通过对古龙油田葡萄花油层生油条件及运移模式分析,结合油气储藏条件、圈闭条件及失利井分析,确定了该工区各个区块的不同成藏因素。7.在前面高分辨率层序地层学、构造及断裂特征、沉积特征、储层特征及成岩作用、成藏规律、主控因素以及油水分布规律研究基础之上,结合油藏类型及试油试采井以及开发井产能等情况,预测了有利区块,并优选设计井位。
[Abstract]:For the reservoir distribution complex Gulong oilfield, the oil-water distribution of accurate prediction of oilfield, is to ensure the stable production of oil, improve the core recovery. Influenced by lithology and structure, area of oil-water distribution appears oil-water layer, oil water, underwater oil, oil-water layer between each other "and other characteristics combined with various means characterization of micro amplitude structures, sedimentary microfacies, reservoir conditions of oil and gas, is the oil-water distribution of reservoirs in Putaohua reservoir in Gulong oilfield improve understanding accuracy, find the key and favorable block wells. Favorable arrangement in the study area is mainly lithologic reservoir, followed by structural lithologic reservoir, the main oil-bearing formation for Putaohua section, the lithology in the longitudinal, transverse changes quickly, the reservoir distribution is not stable in space. In the process of continuous exploration and development of Gulong oilfield in gradually exposed sand deposition in this area The relationship between oil and water is very complex, the original reserves based on direct development of great risk, need to accurately understand the layers of sand body distribution and reservoir property change, the distribution of oil and water. In this paper, Gulong oilfield Putaohua reservoir as the main study area, to carry out oil reservoir seismic method combined with characterization in the standardization of logging data, combined with geological seismic horizon calibration based on the high resolution sequence stratigraphic division and correlation, many characterization methods of micro amplitude structures, layered segments depict different scale up river sand, breaking up the hierarchical oil-water distribution and reservoir Duan Yan type, Gulong oilfield of Putaohua reservoir in micro structure, reasonable and accurate to find out the distribution of sand bodies and distribution characteristics of fine accumulation controlling factors influence on the distribution of oil and water, the formation of Gulong oilfield Putaohua reservoir fine geologic research process, effective guidance To determine the favorable areas and favorable wells deployment. The main results are as follows: 1. the use of well logging, logging, seismic and other information, to carry out the Putaohua high-resolution sequence stratigraphy, the gulong oilfield Putaohua reservoir, the identification of base level cycles in the studied area was established as a high resolution sequence framework, the Putaohua oil reservoir the overall vertical water gradually becomes shallow water back to the maximum water - water to deepen Sapu dissection process the maximum relative conclusions. Strata from east to west is gradually thinning by.2. dimensional horizontal slice 11 implementation of micro structure, small small grid contour spacing (1m) combined with mapping. The structural trend surface analysis technology, effectively found the micro amplitude structure amplitude less than 5m. There were 160 micro amplitude structure using SGR.3. evaluation method of fault sealing, the fault sealing good old 60% Above, intermediate between 40%-60%, less than 40%.4. in the high resolution sequence stratigraphic division and correlation based on the results of previous studies, the sedimentary system, source direction, sedimentary characteristics, sedimentary facies, sand body types, sedimentary research mode, and combine the results of seismic attributes, and ultimately determine the study area space distribution of sand bodies of.5. detailed analysis of Gulong oilfield of Putaohua reservoir in the vertical plane, the oil-water distribution characteristics. The reservoirs in Putaohua reservoir types, determine the types of reservoir formation and distribution of.6. through the analysis of Putaohua oil conditions and migration patterns of Gulong oilfield grapes, combined with the oil and gas storage conditions, well analysis and defeat trap the reservoir conditions, determine the factors of.7. in high resolution sequence stratigraphy in the area in front of different blocks, tectonic and sedimentary characteristics and fracture characteristics, diagenesis and reservoir characteristics, accumulation, main Controlling factors and distribution of oil and water on the basis of the study, combined with the reservoir type and oil production wells and development wells and predict favorable blocks, and optimal design of wells.

【学位授予单位】：东北石油大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：P618.13

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