朝阳沟油田朝46-116区块储层预测及油水分布特征研究

发布时间：2018-10-17 12:23

【摘要】：朝阳沟油田扶余油层属于特低孔、低渗透储层,主力油层由多期河道砂体叠置组成,但河道规模一般较小,砂体薄,连通性差,地层岩性横向变化快,开发效果差。随着致密油、稠油开发技术的发展和完善,该类储层通过直井缝网压裂、水平井体积压裂、蒸汽吞吐等开发方式,有望实现有效开发,因此通过对区内构造、断裂及储层“四性关系”的研究,确定油气水分布规律,开展朝46-116区块地质及开发特征重新认识,进一步落实区块储量潜力,探索新的有效动用措施为开发方案编制及有利区域预测提供依据。通过对该区进行研究取得了以下几方面的认识:1.通过精细合成记录对比、分级层位解释和断裂精细雕刻,完成研究区构造精细解释,完成了层位FI1、FI3、FI6、FII1重点层位共4层的构造成图,并完成各层断层要素表统计;2.根据扶余油层砂泥岩纵向配置关系,设计地质正演模型,开展正演模拟研究,优选扶余油层地震属性,完成扶余油层各油层组砂岩预测,各层综合符合率78.5%;3.通过试验,确定反演关键参数,采用地质统计学反演,完成研究区砂岩及有效厚度预测,后验井符合率达到81%;4.扶余油层沉积环境主要为三角洲分流平原亚相,发育分流河道、分流间湾和席状砂微相。受西南物源控制,河道以北东向展布为主。在单井相、微相组合基础上,以沉积学原理为指导,井震结合,绘制小层沉积微相7张。5.根据构造解释、成藏分析,通过二分法进行油水关系分析,确定有利含油区,根据构造、属性、砂岩及有效厚度预测图优选水平井5口,其中FI3小层4口,FI5小层1口。
[Abstract]:The Fuyu reservoir in Chaoyang Gou Oilfield belongs to very low porosity and low permeability reservoir. The main reservoir is composed of multi-stage channel sand body superposition, but the river channel scale is generally smaller, the sand body is thin, the connectivity is poor, the formation lithology changes quickly and the development effect is poor. With the development and perfection of the development technology of dense oil and heavy oil, this kind of reservoir is expected to realize effective development through the development of straight well fracture pattern fracturing, horizontal well volume fracturing, steam huff and puff, etc. The study of the "four-sex relationship" between faults and reservoirs, the determination of oil-gas-water distribution law, the development of geological and development characteristics of Block Chao46-116, and the further realization of the potential reserves of the blocks, To explore new effective use measures to provide basis for development program preparation and favorable area prediction. Through the study of this area, the following aspects of understanding are obtained: 1. The fine interpretation of the structure of the study area is completed through fine composite record comparison, stratified layer interpretation and fine carving of faults, and the tectonic map of the four layers of the key horizon of FI1,FI3,FI6,FII1 is completed, and the statistics of the fault elements of each layer are completed; 2. According to the vertical distribution relationship of sand and mudstone in Fuyu reservoir, the geological forward modeling is designed, the forward simulation study is carried out, the seismic attribute of Fuyu reservoir is selected, and the sandstone prediction of each reservoir in Fuyu reservoir is completed, and the comprehensive coincidence rate of each layer is 78.5%. The key parameters of inversion are determined by experiments and geostatistical inversion is used to predict the sandstone and effective thickness in the study area. The sedimentary environment of Fuyu reservoir is mainly delta distributary plain subfacies, distributary channel, distributary bay and sheet sand microfacies. Controlled by the southwest source, the river is mainly spread from north to east. Based on the combination of single well facies and microfacies, based on the principle of sedimentology and well shock, 7 microfacies of small layer were drawn. According to structural interpretation, reservoir formation analysis and oil-water relationship analysis by dichotomy, the favorable oil-bearing area is determined. According to the structure, attributes, sandstone and effective thickness prediction map, 5 horizontal wells are selected, including 4 FI3 layers and 1 FI5 sublayer.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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