综合沉积正演与多点地质统计模拟碳酸盐岩台地——以巴西Jupiter油田为例

发布时间：2018-02-24 19:50

本文关键词： 沉积数值模拟多点地质统计学训练图像碳酸盐岩台地三维图像　出处：《石油学报》2017年08期 　论文类型：期刊论文

【摘要】：为有效提高碳酸盐岩沉积相(岩相)模拟的精度,以巴西Jupiter油田为例,在岩心、测井及地震资料综合分析的基础上,通过多条件约束建立该地区碳酸盐岩台地沉积正演模型,以此作为多点地质统计模拟的三维训练图像,并利用成熟的Snesim算法对实际油田数据进行模拟。研究结果表明:沉积正演模拟初始控制条件对碳酸盐岩台地沉积分布影响较大,主要包括水深、风向、波浪能量、碳酸盐岩产率等,其中水深(主要影响温度和光照)对碳酸盐岩产率影响最大;波浪能量大小控制不同类型碳酸盐岩分布特征,高能环境沉积物主要为生物礁及颗粒灰岩,低能环境沉积物主要为泥晶灰岩;碳酸盐岩沉积正演模型体现了高能生物礁与低能泥晶灰岩的渐变接触关系,符合碳酸盐岩生长规律,将其转化为三维训练图像,多点模拟结果既满足所有钻井认识又体现了训练图像反映的相结构关系。本研究总结了碳酸盐岩台地沉积正演模拟的分析方法,提出三维训练图像获取较新的思路,综合了沉积正演模拟与多点统计模拟的优势,并在实际油田应用中取得一定效果,对类似孔隙性碳酸盐岩油藏地质建模具有借鉴意义。
[Abstract]:In order to improve the accuracy of carbonate sedimentary facies (facies) simulation effectively, taking Jupiter Oilfield of Brazil as an example, on the basis of comprehensive analysis of core, logging and seismic data, the forward model of carbonate platform deposition in this area is established by multi-condition constraints. The results show that the initial control conditions of forward modeling have a great influence on the sedimentary distribution of carbonate platform, and a mature Snesim algorithm is used to simulate the actual oil field data, which can be used as a three-dimensional training image of multi-point geological statistical simulation, and the results show that the initial control conditions of forward modeling have a great influence on the distribution of carbonate platform sediments. It mainly includes water depth, wind direction, wave energy, carbonate yield and so on, in which water depth (mainly affecting temperature and light) has the greatest influence on carbonate rock yield, wave energy size controls the distribution characteristics of different types of carbonate rock, The sediments in high energy environment are mainly reef and granular limestone, while those in low energy environment are mainly marl limestone, the forward model of carbonate sedimentary reflects the gradual contact relationship between high energy reef and low energy mudstone. According to the law of carbonate rock growth, it is transformed into three-dimensional training image. The results of multi-point simulation not only satisfy all drilling knowledge but also reflect the relationship of facies structure reflected by training images. In this study, the analytical method of forward modeling of carbonate platform sediment is summarized, and a new idea of obtaining 3D training images is put forward. The advantages of sedimentary forward modeling and multipoint statistical simulation are synthesised, and some results are obtained in the application of actual oil fields, which is useful for geological modeling of similar porous carbonate reservoirs.
【作者单位】：中国石油化工股份有限公司石油勘探开发研究院;中海石油(中国)有限公司天津分公司;
【基金】：中国石油化工股份有限公司科技部项目(G5800-15-ZS-KJB016) 国家重大科技专项(2016ZX05033-003-002)资助
【分类号】：P618.13;P628.3

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