敖南油田敖A区块PⅠ层组储层预测

发布时间：2018-06-14 12:02

本文选题：储层反演 + 谱分解　；参考：《东北石油大学》2017年硕士论文

【摘要】：针对敖南油田敖A区块储层分布不稳定、横向变化快、单井钻遇厚度薄、开发风险大的勘探开发问题,本文提出了有效的综合预测储层的思路和方法,加强了对该区储层分布规律的认识,为下一步的水平井位设计提供建议。本文将研究区的地震数据、测井曲线、地质特征等资料紧密结合,在稀疏脉冲波阻抗反演的基础上应用谱分解技术,精细刻画了研究区薄互层砂体的空间展布情况,研究表明:敖A区块P11、P12、P32、P42小层砂岩较发育,砂岩纵向叠加连片,具有北部厚、南部薄的特征,北部砂岩最厚9米,南部砂岩最厚2米,B3620098井区和M1705250井区为两个低值区,分布的砂岩厚度在1-2米。在此基础上,利用Petrel软件,对五种建模方法进行优选,优选出最终模型能够较真实反映地下地质体空间展布特征的建模方法,即地震协同相控序贯指示克里金模拟方法,从而建立了研究区储层的岩性模型和属性模型。研究表明:敖A区块砂体较发育小层 P11、P12、P32、P42 的孔隙度在 14%-18%,渗透率在22×10~(-3)μm~2-63±10~(-3)μm~2,两者的高值区与同层的砂岩发育区有较好的对应关系,为下一步水平井的设计提供依据。综合波阻抗反演、谱分解和三维地质建模研究成果,绘制敖A区块综合评价图,在水平井潜力区评价基础上,选择直井深电阻值大于7Q·m,伽马值小于90API的油层,砂体展布宽度大于900m,砂体规模储量大于2.8×10~4t,砂体厚度大于0.6米的主力相带区域,设计水平井5 口。
[Abstract]:Aiming at the problems of unstable reservoir distribution, fast lateral change, thin drilling thickness of single well and high development risk in AoA block of AoA block in Aonan Oilfield, this paper puts forward an effective thinking and method for comprehensive reservoir prediction. The understanding of reservoir distribution law in this area is strengthened, and suggestions for horizontal well level design in the next step are provided. In this paper, the seismic data, logging curves and geological characteristics of the study area are closely combined, and the spatial distribution of thin interbedded sand bodies in the study area is described by using spectral decomposition technique on the basis of sparse pulse wave impedance inversion. The results show that the sandstone is relatively developed in P11P12P32P2P42 in AoA block. The sandstone is stacked vertically, with the characteristics of thickness in the north and thin in the south. The thickest sandstone is 9 meters in the north, the thickest in the south is 2 meters in the B3620098 well area and two low value areas in the M1705250 well area. The thickness of the distributed sandstone is 1-2 m. On this basis, using Petrel software, five modeling methods are selected, and the final model is selected to reflect the spatial distribution characteristics of underground geological bodies, that is, seismic synergetic phase control sequential indicator Kriging simulation method. Thus, the lithologic model and attribute model of reservoir in the study area are established. The results show that the porosity of the sand body P11P12P32P42 is 14-18 and the permeability is 22 脳 10 ~ (-3) 渭 m ~ (-2) 渭 m ~ (-2). The relationship between the high value area of the sand body and the sandstone development area of the same layer is relatively good, which provides the basis for the design of horizontal wells in the next step. By synthesizing the research results of wave impedance inversion, spectral decomposition and 3D geological modeling, the comprehensive evaluation map of AoA block is drawn. On the basis of the evaluation of the potential area of horizontal wells, the reservoir whose depth resistance value is greater than 7Q m and gamma value less than 90 API is selected. Five horizontal wells are designed for the main facies zones with sand distribution width greater than 900m, sand body size more than 2.8 脳 10 ~ (4) t and sand body thickness greater than 0.6 m.
【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】：TE243;P618.13

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