葡北油田高效井控制因素研究
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摘要
葡北油田已进入高含水的开发阶段,层间、层内非均质矛盾日益突出,水驱开采不均匀现象严重,油田构造被断层复杂化,且受砂体展布特征的影响,剩余油分布复杂而零散,这些残留在地下的剩余石油储量对增加可采储量和提高采收率是一个巨大的潜力。因此,必须对剩余油潜力进行深入的分析,了解和掌握剩余油分布规律及挖潜办法。目前挖潜剩余油主要集中在剩余油饱和度富集区施加相应的增产增注措施或部署平面调整挖潜井。因此,在剩余油饱和度富集区寻找高效井是挖潜这些剩余油的有效途径之一,对保持葡北油田的稳定生产具有重要的意义。
应用油气田开发地质统计分析方法,分析了葡北油田高效井的地质特征,确定了影响高效井的主要地质因素有高效井所处构造位置、微构造类型、沉积微相类型、有效厚度等。利用相对渗透率和采油指数的关系或者从油井拟稳态渗流方程出发,给出了两种确定油井单井控制储量的方法。应用现代油藏工程方法,分析了葡北油田高效井的开发特征,确定了影响高效井的主要工程因素有井网、注采关系、措施等。
在地质特征和开发特征研究成果基础上,应用储层渗流理论,并结合流线积分方法和单元分析方法,建立了不同面积井网和沉积微相组合关系的渗流模型。利用已定量的各类储层参数和开发参数,采用综合评价的方法,建立了高效井成因模式,给出了不同类型剩余油的挖潜方法,为今后利用高效井挖潜不同类型剩余油提供技术及理论支持。
It has come into the development stage of the high water cut in Pu-bei oilfield, interformational and intraformational aeolotropism becomes very serious, heterogeneous appearance of waterflooding exploitation is severe, the structure is complex owing to the faults in Pu-bei oilfield, the distribution of remaining oil is complicate and scattered , which is affected through-going characteristic of sand body, the residual oil in place is a huge potence for increasing recoverable reserves and enhancing oil recovery. Therefore, we have to analyze the potential of remaining oil, to comprehend and master the distribution and potential method of remaining oil. At present, tapping the latent power is in concentration area of remainder oil saturation, by applying commensurable measure and deploying adjustment well. As a result, it is an active method of tapping the latent power remaining oil that looking for high efficient wells in concentration area of remainder oil saturation, and it is significant for steady production of Pu-bei oilfield.
By applying oil/gas field development geostatistic analysis, we analyze geologic characteristic of high efficient well, the key geologic factors of affecting high efficient well are structural location, microtectonics, microfacies, effective thickness and so on. Two methods of determining oil well control reserve are proposed by using the relationship relative permeability and productivity index and stable state flow equation. By applying modern reservoir engineering method, we analyze development characteristic of high efficient well, the key project factors of affecting high efficient well are well network, water flooding regime, measure and so on.
Based on the results of research of geologic characteristic and development characteristic, and applying reservoir filtration theory and uniting flowline integration method and cell analytic approach, the model of infiltrating fluid for different areal pattern and deposit microfacies is established. In this paper, through making use of all sorts of reservoir parameters and operational parameters which are applied, and adopting the method of comprehensive evaluation, the genetic model of high efficient wells is established, potential method of different types of remaining oil. It provides technique and theory support for using high efficient well to tap the latent power different types of remaining oil.
应用油气田开发地质统计分析方法,分析了葡北油田高效井的地质特征,确定了影响高效井的主要地质因素有高效井所处构造位置、微构造类型、沉积微相类型、有效厚度等。利用相对渗透率和采油指数的关系或者从油井拟稳态渗流方程出发,给出了两种确定油井单井控制储量的方法。应用现代油藏工程方法,分析了葡北油田高效井的开发特征,确定了影响高效井的主要工程因素有井网、注采关系、措施等。
在地质特征和开发特征研究成果基础上,应用储层渗流理论,并结合流线积分方法和单元分析方法,建立了不同面积井网和沉积微相组合关系的渗流模型。利用已定量的各类储层参数和开发参数,采用综合评价的方法,建立了高效井成因模式,给出了不同类型剩余油的挖潜方法,为今后利用高效井挖潜不同类型剩余油提供技术及理论支持。
It has come into the development stage of the high water cut in Pu-bei oilfield, interformational and intraformational aeolotropism becomes very serious, heterogeneous appearance of waterflooding exploitation is severe, the structure is complex owing to the faults in Pu-bei oilfield, the distribution of remaining oil is complicate and scattered , which is affected through-going characteristic of sand body, the residual oil in place is a huge potence for increasing recoverable reserves and enhancing oil recovery. Therefore, we have to analyze the potential of remaining oil, to comprehend and master the distribution and potential method of remaining oil. At present, tapping the latent power is in concentration area of remainder oil saturation, by applying commensurable measure and deploying adjustment well. As a result, it is an active method of tapping the latent power remaining oil that looking for high efficient wells in concentration area of remainder oil saturation, and it is significant for steady production of Pu-bei oilfield.
By applying oil/gas field development geostatistic analysis, we analyze geologic characteristic of high efficient well, the key geologic factors of affecting high efficient well are structural location, microtectonics, microfacies, effective thickness and so on. Two methods of determining oil well control reserve are proposed by using the relationship relative permeability and productivity index and stable state flow equation. By applying modern reservoir engineering method, we analyze development characteristic of high efficient well, the key project factors of affecting high efficient well are well network, water flooding regime, measure and so on.
Based on the results of research of geologic characteristic and development characteristic, and applying reservoir filtration theory and uniting flowline integration method and cell analytic approach, the model of infiltrating fluid for different areal pattern and deposit microfacies is established. In this paper, through making use of all sorts of reservoir parameters and operational parameters which are applied, and adopting the method of comprehensive evaluation, the genetic model of high efficient wells is established, potential method of different types of remaining oil. It provides technique and theory support for using high efficient well to tap the latent power different types of remaining oil.
引文
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