BZ Oilfield is a medium-sized oilfield with shallow delta facies deposits in Bohai Bay of China,compared with fluvial and delta facies oilfields,there is no mature experience for reference of reservoir configuration,w...BZ Oilfield is a medium-sized oilfield with shallow delta facies deposits in Bohai Bay of China,compared with fluvial and delta facies oilfields,there is no mature experience for reference of reservoir configuration,well pattern arrangement and development model in offshore oilfields in China.In view of the difficulty in describing the reservoir configuration of shallow water delta,the single distributary sand dam in shallow water delta is characterized by well-seismic combination and multi-attribute constraints.The mathematical mechanism model of pinch-out position of sand body is established,fine characterization of BZ shallow water delta reservoir is put forward.The horizontal well pattern arrangement type for shallow water delta reservoir is proposed and the method of well pattern optimization based on vertical displacement theory is put forward.A method of inversion of reservoir connectivity using production dynamic data by numerical well testing is proposed and a new method for optimizing water injection rate in water injection wells is proposed aiming at the difficulty of recognizing injection-production connectivity of shallow water delta reservoirs.The fine configuration of BZ shallow water delta reservoir based on distributary sand dam is proposed,which guides the recognition of remaining oil distribution law.By deploying adjustment wells,the water flooding coincidence degree of actual drilling is 86% compared with that of pre-drilling prediction,which indicates that the research results of reservoir configuration can effectively guide the understanding of oilfield geology.Through the theoretical well arrangement type of vertical displacement of single sand body in horizontal wells of shallow water delta reservoir,a high water flooding recovery rate of 35% is achieved in primary well pattern.The connectivity coefficients of injection-production boundary of shallow water delta reservoir configuration are calculated,and the water injection distribution coefficients are obtained by normalizing the directional coefficients.This paper presents a configuration method based on multi-attribute fusion under the constraints of sedimentary process.In this paper,a shallow water delta reservoir configuration method based on multi-attribute fusion constrained by sedimentary process is proposed,and the injection-production connectivity coefficient and injection well distribution coefficient of the configuration boundary are calculated.展开更多
针对中国南海海况恶劣,浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)在南海服役多年后,少数支墩由于建造工艺出现裂纹问题,以南海某深水FPSO为研究对象,对常用箱式支墩形式进行改进优化设计。运用有限元方法...针对中国南海海况恶劣,浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)在南海服役多年后,少数支墩由于建造工艺出现裂纹问题,以南海某深水FPSO为研究对象,对常用箱式支墩形式进行改进优化设计。运用有限元方法对箱式模块支墩和改进后的丰字形模块支墩与十字交叉带裙边支墩进行评估,对不同支墩形式进行强度分析、变形分析和疲劳分析,并对不同支墩的工艺进行综合对比,结合工程实践和有限元计算,给出支墩推荐设计方案。结果表明,优化后的十字交叉带裙边支墩结构强度和疲劳均优于箱式支墩,同时还具有便于加工组装的特点,最终选定十字交叉带裙边支墩方案。展开更多
文摘BZ Oilfield is a medium-sized oilfield with shallow delta facies deposits in Bohai Bay of China,compared with fluvial and delta facies oilfields,there is no mature experience for reference of reservoir configuration,well pattern arrangement and development model in offshore oilfields in China.In view of the difficulty in describing the reservoir configuration of shallow water delta,the single distributary sand dam in shallow water delta is characterized by well-seismic combination and multi-attribute constraints.The mathematical mechanism model of pinch-out position of sand body is established,fine characterization of BZ shallow water delta reservoir is put forward.The horizontal well pattern arrangement type for shallow water delta reservoir is proposed and the method of well pattern optimization based on vertical displacement theory is put forward.A method of inversion of reservoir connectivity using production dynamic data by numerical well testing is proposed and a new method for optimizing water injection rate in water injection wells is proposed aiming at the difficulty of recognizing injection-production connectivity of shallow water delta reservoirs.The fine configuration of BZ shallow water delta reservoir based on distributary sand dam is proposed,which guides the recognition of remaining oil distribution law.By deploying adjustment wells,the water flooding coincidence degree of actual drilling is 86% compared with that of pre-drilling prediction,which indicates that the research results of reservoir configuration can effectively guide the understanding of oilfield geology.Through the theoretical well arrangement type of vertical displacement of single sand body in horizontal wells of shallow water delta reservoir,a high water flooding recovery rate of 35% is achieved in primary well pattern.The connectivity coefficients of injection-production boundary of shallow water delta reservoir configuration are calculated,and the water injection distribution coefficients are obtained by normalizing the directional coefficients.This paper presents a configuration method based on multi-attribute fusion under the constraints of sedimentary process.In this paper,a shallow water delta reservoir configuration method based on multi-attribute fusion constrained by sedimentary process is proposed,and the injection-production connectivity coefficient and injection well distribution coefficient of the configuration boundary are calculated.
文摘针对中国南海海况恶劣,浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)在南海服役多年后,少数支墩由于建造工艺出现裂纹问题,以南海某深水FPSO为研究对象,对常用箱式支墩形式进行改进优化设计。运用有限元方法对箱式模块支墩和改进后的丰字形模块支墩与十字交叉带裙边支墩进行评估,对不同支墩形式进行强度分析、变形分析和疲劳分析,并对不同支墩的工艺进行综合对比,结合工程实践和有限元计算,给出支墩推荐设计方案。结果表明,优化后的十字交叉带裙边支墩结构强度和疲劳均优于箱式支墩,同时还具有便于加工组装的特点,最终选定十字交叉带裙边支墩方案。
