头台油田葡萄花油层沉积特征及有利区预测

发布时间：2018-01-28 03:47

本文关键词： 葡萄花油层沉积微相砂体特征有利区预测滚动外扩　出处：《东北石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：头台油田开发的葡萄花油层属于永乐油田,区域构造上属于松辽盆地中央坳陷区三肇凹陷,位于其东南部,包括了永乐向斜及向西至长垣葡萄花背斜之间抬升的斜坡。目的层为受北部大型河流—三角洲沉积体系控制下的三角洲内-外前缘沉积,属于低渗透裂缝性薄差储层。葡萄花油层未动用储量主要分布在源1s区块周边,处于永乐油田最南部,均为难动用的“三低”储层,即储量丰度低、渗透率低、单井产能低。近年来的外扩区块低效井比例大,有效动用这部分未动用储量,满足新区产能建设的需要,亟需研究这部分储量优选方法和有效动用技术,本文开展了头台油田葡萄花油层砂体特征及有利区预测,为新区产能建设提供保障。地质学、层序地层学、沉积学及石油地质学是本次研究区沉积微相系统研究的基础,本次研究选择有代表性的典型井作为标志井,将研究区葡萄花油层划分为5个小层9个沉积单元,建立骨架剖面,完成了全区896口井的统层对比,建立测井相模式,完成了全区9个沉积单元的沉积微相图,并对其进行了详尽描述。在此基础上,通过绘制砂体厚度等值图和统计各单元砂体厚度、砂岩钻遇率,分析砂体平面及纵向分布特征,对不同微相砂体展布特点、发育层位,演化特征等进行总结归纳。通过岩心观察葡萄花油层的裂缝主要为层间缝和构造缝,分析其存在部位、含油产状等。利用水压压裂裂缝测试结果、压力测试结果、示踪剂测试结果、测试资料等,分析裂缝对渗透率的影响,裂缝的方向等。对未动用区进行了利用沉积规律再认识及钻首钻井的方法进行了预测和优选,针对砂体展布的不确定性,研究以追踪砂体为目的,边打井边预测的滚动外扩钻井模式,提高河道砂体钻遇率。对不同类型砂体的开发井网、布井方式和开发方式提出了优化。
[Abstract]:The Putaohua reservoir developed in Toutai Oilfield belongs to Yongle Oilfield, and the regional structure belongs to Sanzhao Depression in the central depression of Songliao Basin, which is located in the southeast of the basin. It includes the uplift slope of Yongle syncline and westward to Changyuan Grape anticline. The target layer is delta inner and outer front deposit controlled by large fluvial delta sedimentary system in the north. It belongs to the thin and poor reservoir with low permeability fracture. The unproduced reserves of the Putaohua reservoir are mainly distributed around the source 1s block and are located in the southernmost part of Yongle oilfield, which are the "three low" reservoirs which are difficult to produce, that is, the reserves abundance is low. Low permeability and low single well productivity. In recent years, the proportion of low efficiency wells in expandable block is large, which can effectively use this part of unused reserves to meet the needs of productivity construction in the new area. It is urgent to study this part of optimal reserve selection method and effective production technology. In this paper, the sand body characteristics and favorable area prediction are carried out in the Grape Oil Reservoir of Toutai Oilfield, which provides a guarantee for the production capacity construction of the new area. Geology, sequence stratigraphy. Sedimentology and petroleum geology are the basis for the study of sedimentary microfacies system in this study area. In this study, the representative typical wells are selected as the mark wells, and the Gaohua reservoir in the study area is divided into 5 sub-layers and 9 sedimentary units. The skeleton section is established, the reservoir correlation of 896 wells in the whole area is completed, the logging facies model is established, the sedimentary microfacies diagram of 9 sedimentary units in the whole area is completed, and the sedimentary microfacies diagram of 9 sedimentary units in the whole area is described in detail. By drawing the equivalent map of sand body thickness and counting the thickness of each unit sand body and the rate of sandstone drilling, the horizontal and longitudinal distribution characteristics of sand body are analyzed, the distribution characteristics of different microfacies sand bodies are analyzed, and the layers are developed. Through core observation, the fractures are mainly interlayer fractures and structural fractures, analyze their existing position, oil-bearing occurrence and so on. Use hydraulic fracturing fracture test results. Pressure test results, tracer test results, test data, etc., to analyze the impact of fractures on permeability. The direction of fracture, etc. The paper predicts and optimizes the method of using sedimentary law to recognize and drill head drilling in unused area, aiming at the uncertainty of sand body distribution, the purpose of the research is to track sand body. In order to improve the drilling rate of channel sand body, the development pattern, well layout and development mode of different types of sand bodies are optimized.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P618.13;TE34

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