未动用储量分类方法及产能潜力评价

CLASSIFYING METHOD AND PRODUCTIVITY POTENTIAL EVALUATION OF THE UNDEVELOPED RESERVES

为了提高未动用储量的动用率，应用多因素分类方法评价了未动用储量品质和产能潜力。针对长垣东部葡萄花油层未动用储量的现状和地质特点，应用聚类分析法优选评价参数，并基于层次分析建立了综合分类评价指标。运用概率累计曲线分析后将未动用储量分成3类：一类储量品质好，发育层数多，油水关系清楚，分流河道发育；二类储量品质中等，个别储量区块油水关系倒置，主体厚层席状砂发育；三类储量丰度低，储层物性差，以纯油层为主，主体薄层席状砂发育，部分储量区块潜裂缝发育，井控程度低。在此基础上，借鉴周边区域的开发效果制定了相应对策，估算的产能潜力为外围油田持续稳产提供了依据。

In order to enhance the developed rate of the undeveloped reserves, the reserves quality and productivi- ty potentials are evaluated by means of multl-factor analyzing methodmclustering analysis methods. According to the geological characteristics and current undeveloped reserves status of Putaohua oil reservoirs of East Daqing Pta- canticline, the evaluating parameters are optimized by clustering analysis methods, and moreover with the help of analytic hierarchy process ~ the comprehensive classifying and evaluating indices are established. After analyzing the cumulative probability curve for the indexes, the undeveloped reserves are classified into three types： Type one re- fers to the reserves with good qualities, many developed reservoirs, clear water and oil relation and well-developed distributary river channels; Type two means the reserves with medium qualities, inverse water and oil relation in special block and well-developed sand sheet in the main thick reservoirs; Type three indicates the reserves with rather lower abundance, poorer physical properties, taking net oil pay as main form, well-developed thin sand sheet in the main reservoirs, well-devel0ped potential fractures in partial blocks and moreover the poorer well controlled degree. For this reason, the corresponding development countermeasures are built up taking the development effects of the peripheral areas, the estimated productivity potentials have provided the evidences for the sustainable and stable production of the peripheral oilfields.