海上稠油油藏油井产能特征主控因素量化评价

针对海上P稠油油藏纵向层薄,构造平缓,油井产能特征差异大的特点,从地质条件、储层物性及流体性质等方面,研究油井产能特征主控因素。油井产能特征是油井生产能力及稳产能力的综合体现,采用层次分析法及灰色关联法,量化评价了油井产能特征的主控因素的影响程度。研究表明,原油流度及边水距离是影响油井生产能力的主要因素;边水距离、隔夹层及砂体厚度是影响油井稳产能力的主要因素;油井产能特征综合影响程度排序为原油流度、边水距离、砂体厚度、隔夹层及泥质含量。本文针对性地提出提高油井生产能力,延长稳产期的三个措施方向:提高油井周围原油流度、改善油井附近能量供应情况及提高井控储量,对开展精准的开发调整方案具有重要意义。

Quantitative evaluation of controlling factors on well productivity characteristics in offshore heavy oil reservoirs

In terms of thin layer,gentle tectonic and large difference of oil well productivity characteristics in P offshore heavy oil reservoir,controlling factors on the oil productivity characteristics were studied from the aspects of geological,reservoir physical properties and fluid properties.Well productivity characteristics are a combination of production capacity and rate maintenance capability,the main factors affecting of oil well productivity characteristics quantitatively evaluated by means of grey correlation method and analytic hierarchy process.The research shows that oil mobility and water edge distance are the main factors affecting oil well production capacity,and edge water distance,interlayer and sand body thickness are the main factors affecting oil well rate maintenance capability,the important comprehensive arrangement of main controlling factors is oil mobility,edge water distance,sand body thickness,interlayers and shale content.Three pertinent countermeasure for improving oil well production capacity and prolonging stable production period are suggested,increase the oil mobility near well,improve energy supply near well and enlarge controlled reserve,it is of great significance to precisely studied development adjustment plan.