地质统计学储层建模技术在印尼马六甲AI和N油田的应用
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摘要
油田开发中后期 ,油藏构造及油水关系已基本描述清楚 ,该阶段油藏描述的重点是建立储层预测模型 ,对井点间及以外区域的储层参数作一定精度的内插或外推预测 ,精细描述储层的连通性及储层物性在空间上的变化 ,为建立精细的油藏模拟模型和描述剩余油的分布提供地质基础。印尼马六甲 AI和 N油田已进入高含水期 ,由于海上钻井费用高 ,因此钻井数目不可能象陆地油田那样多 ,如果利用传统的插值方法描述储层属性 ,极易歪曲储层的非均质性。文中把钻井资料、地震信息与沉积相分析结果相结合 ,利用地质统计学中同位协克里金方法建立了储层地质模型。相对于传统的方法而言 ,地质统计学方法建立的储层预测模型更为合理。在储层地质模型的基础上建立了油藏数值模拟模型 ,历史拟合研究表明 ,该地质模型较以往的地质模型更精细、可靠、合理。同时 ,利用三维图形显示技术 ,使地质模型的质量得到了有效控制 ,从而能更真实直观地反映储层属性在三维空间的分布特征 ,为油田调整井设计及生产动态分析提供了重要地质依据
During the middle later development period of an oilfield when reservoir structure and oil water relation have been described clearly, the main task of reservoir description is to build a prediction model of reservoir in order to conduct interwell and beyond well interpolation and extrapolation of reservoir parameters and to refinedly describe reservoir connectivity and petrophysic variability, which can provide a geological base for building a refined reservoir simulation model and describing remaining oil distribution. The AI&N field, Malacca Strait, Indonesia, has been in a high water cut period, where producing wells are relatively less due to higher offshore drilling cost, and using traditional interpolation may be easy to distort heterogeneity of reservoir. This paper has built a geological reservoir model using a geostatistic collocated cokriging technique in combination with drilling, seismic and depositional facies data. This kind of reservoir prediction model is more reasonable than that built by traditional techniques. The production history matches conducted on a reservoir simulation model derived from the geological model indicate that this geological model is more refined, reliable and reasonable. In addition, the geological model quality may be controlled effectively by 3D visualization techniques, and space distribution of reservoir properties can be viewed more intuitively, providing geological evidences for adjustment well design and performance analysis.
During the middle later development period of an oilfield when reservoir structure and oil water relation have been described clearly, the main task of reservoir description is to build a prediction model of reservoir in order to conduct interwell and beyond well interpolation and extrapolation of reservoir parameters and to refinedly describe reservoir connectivity and petrophysic variability, which can provide a geological base for building a refined reservoir simulation model and describing remaining oil distribution. The AI&N field, Malacca Strait, Indonesia, has been in a high water cut period, where producing wells are relatively less due to higher offshore drilling cost, and using traditional interpolation may be easy to distort heterogeneity of reservoir. This paper has built a geological reservoir model using a geostatistic collocated cokriging technique in combination with drilling, seismic and depositional facies data. This kind of reservoir prediction model is more reasonable than that built by traditional techniques. The production history matches conducted on a reservoir simulation model derived from the geological model indicate that this geological model is more refined, reliable and reasonable. In addition, the geological model quality may be controlled effectively by 3D visualization techniques, and space distribution of reservoir properties can be viewed more intuitively, providing geological evidences for adjustment well design and performance analysis.
引文
1 王任铎,胡光道.线形地质统计学.北京:地质出版社,1988
2 侯景儒,黄竞先.地质统计学及其在矿产储量计算中的应用.北京:地质出版社,1982
3 刘承祚.数学地质基本方法及应用.北京:地质出版社,1981
4 李汤玉,姜衍智,薛中天.石油工业常用数理统计方法.北京:石油工业出版社,1995
5 王寿庆.扇三角洲模式.北京:石油工业出版社,1993
2 侯景儒,黄竞先.地质统计学及其在矿产储量计算中的应用.北京:地质出版社,1982
3 刘承祚.数学地质基本方法及应用.北京:地质出版社,1981
4 李汤玉,姜衍智,薛中天.石油工业常用数理统计方法.北京:石油工业出版社,1995
5 王寿庆.扇三角洲模式.北京:石油工业出版社,1993
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