珠江口盆地B油田储量参数概率分布

发布时间：2018-04-10 15:20

本文选题：概率法 + 储量参数　；参考：《石油实验地质》2017年04期

【摘要】：针对珠江口盆地某油田圈闭面积大、构造不规则且井资料少等问题,为了准确获取储量大小、潜力和风险,采用概率法进行储量快速评估是目前最为有效的方法。以B油田Z5油藏为例,考虑到该油藏构造两翼较陡以及中间过渡带较长且井控程度较低,采用面积-厚度-形状因子法构建岩石体积模型,提出根据油藏形状分为N个模块,分模块精细刻画Z5油藏形态,降低构造形态不规则对储量的影响。其中有效厚度、孔隙度采用对数正态分布,含油饱和度采用正态分布,含油面积、体积系数和原油密度均采用单值分布模型,建立各参数概率分布以及储量概率分布模型。结果表明,概算法Pmean储量结果与该油藏确定性方法计算储量规模接近,两者误差不到4%。结合地质参数对储量大小敏感性分析结果,可指导油藏部门进行储量敏感性、经济性、风险和潜力的深入研究,为开发方案与决策的制定提供依据。
[Abstract]:Aiming at the problems of large trap area, irregular structure and little well data in a certain oilfield in Pearl River mouth Basin, in order to accurately obtain reserves size, potential and risk, it is the most effective method to quickly evaluate reserves by using probability method.Taking Z5 reservoir in B oilfield as an example, considering the steepness of the structural flanks and the long intermediate transition zone and low well control degree, the area thickness shape factor method is used to construct the rock volume model, which is divided into N modules according to the reservoir shape.The Z5 reservoir shape is described in detail by submodules to reduce the influence of irregular structural shape on reserves.Among them, the effective thickness and porosity are logarithmic normal distribution, oil saturation is normal distribution, oil area, volume coefficient and crude oil density are all used single value distribution model, the probability distribution and reserve probability distribution model of each parameter are established.The results show that the Pmean reserves obtained by the estimation method are close to those calculated by the deterministic method, and the errors between the two methods are less than 4%.Combined with the results of geological parameter sensitivity analysis to reserves, it can guide reservoir departments to study reserve sensitivity, economy, risk and potential, and provide the basis for making development plan and decision.
【作者单位】：中海石油(中国)有限公司深圳分公司;
【基金】：国家科技重大专项“南海东部海域大中型油气田地质特征”(2011ZX05023-006-03)资助
【分类号】：P618.13;TE155

【相似文献】