文135块地质建模与剩余油分布规律研究

发布时间：2018-11-05 10:40

【摘要】：由于长期开发而导致文135块的油水关系复杂,严重影响了进一步的调整挖潜。本论文运用层序地层学、构造地质学、沉积学和石油地质学作为理论指导,通过地质建模软件petrel,运用相控随机建模技术等多种新理论、新方法和新技术,建立反映油藏实际地质现状的精细地质模型,开展数值模拟研究进行开发动态分析,实现剩余油分布模拟,为提高文135块的开发效率提供坚实的理论依据。以旋回-厚度法为主,等高程法为辅,在前期砂层组划分对比的基础上,对沙二下4砂组~沙三上3砂组展开了地层精细划分对比,共划分为8砂组、48个小层,建立出精细地层框架,为高精度地质建模奠定了基础。依据钻井资料、地震解释成果识别的断点数据,结合小层划分对比数据完成了断层模型和层面模型,实现构造模型的建立。基于取芯井沉积相分析和测井相分析,确立了全区109口未取芯井的沉积微相。构成本区油气储层最主要的砂体微相是水下分流河道、河道侧翼和席状砂。应用各小层砂岩厚度图和砂岩百分含量图确定了各主力砂层的分布特征,沙二下7砂组~沙三上1砂组砂体整体发育较差,其他砂组河道砂体连片性和继承性较好。在以上研究基础上,通过井点数据约束,采用随机模拟方法建立了沉积相模型。结合小层砂体数据、油水层测井解释资料、孔渗数据,采用相控建模方法建立了沙二下4砂组至沙三上3砂组几何模型、砂体模型、油层模型、孔隙度及渗透率模型,运用截断取值方法建立含油饱和度和净毛比模型。应用Eclipse 2006数值模拟技术对生产历史进行拟合,定量计算了剩余油饱和度。并与动态分析相结合分析了剩余油分布规律,研究区仅有3个砂组剩余油较为丰富,断层边缘型和井间型进一步调整挖潜难度大,土豆状低渗储层多,产油率低,受沉积微相、构造特征及布井方式影响,主要分布在断层边缘和构造高部位。
[Abstract]:Because of long-term development, the oil-water relationship of Wen135 block is complicated, which seriously affects the further adjustment and tapping potential. In this paper, sequence stratigraphy, tectonic geology, sedimentology and petroleum geology are used as the theoretical guidance, and various new theories, methods and techniques are used in the geological modeling software petrel,. The fine geological model reflecting the actual geological situation of the reservoir is established, the development dynamic analysis is carried out through numerical simulation, and the residual oil distribution simulation is realized, which provides a solid theoretical basis for improving the development efficiency of Wen135 block. The cyclic-thickness method was used as the main method, and the isometric method was used as the auxiliary method. On the basis of the early sand formation division and correlation, the stratigraphic fine division and correlation were carried out for the sand formation from the 4th sand formation to the upper third sand formation, which were divided into 8 sand groups and 48 sub-layers. The fine stratigraphic framework is established, which lays a foundation for high precision geological modeling. Based on drilling data, fracture point data of seismic interpretation results and correlation data of substratum division, fault model and stratigraphic model are completed, and the structural model is established. The sedimentary microfacies of 109 uncored wells in the whole area were established on the basis of sedimentary facies analysis and logging facies analysis of coring wells. The main microfacies of sand body are subaqueous distributary channel, flanking channel and sheet sand. The distribution characteristics of the main sand beds are determined by using the sandstone thickness map and the sandstone percent content map. The sand bodies of the lower 7 sand formation to the upper 1 sand group of the third sand group are poor, while the other sand groups have good continuity and inheritance of the river channel sand bodies. On the basis of the above research, the sedimentary facies model is established by random simulation method through well point data constraint. Combined with small sand body data, oil and water reservoir log interpretation data, pore and permeability data, the geometric model, sand body model, oil reservoir model, porosity and permeability model of sand formation from 4 sand formation to 3 upper sand formation of sand formation are established by using phase control modeling method. The model of oil saturation and net gross ratio was established by truncation method. The production history was fitted with Eclipse 2006 numerical simulation technology, and the remaining oil saturation was calculated quantitatively. Combined with dynamic analysis, the remaining oil distribution law is analyzed. Only three sand groups in the study area are rich in residual oil, and it is difficult to further adjust the fault margin and cross-well type, with a large number of low permeability reservoirs, low oil production rate and sedimentary microfacies. The influence of structural characteristics and pattern of well arrangement is mainly distributed in the fault margin and the high part of the structure.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;TE327

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