油藏地球化学新技术及其在西达里亚油田开发中的应用前景

A NEW TECHNIQUE OF RESERVIOR GEOCHEMISTRY AND ITS APPLICATION TO DEVELOPMENT OF XIDALIYA OILFIELD

魏福军 张云霞

Wei Fujun Zhang Yunxia

中国新星石油公司, 100083 2. 中国新星石油公司规划院, 100083

China National Star Petroleum Corporation, Beijing 100083 2. Institute of Petroleum, CNSPC, Beijing 100083

由于沉积环境、母源输入、成熟度、油气运移及次生蚀变作用,均可导致原油指纹差异,这就是常见的垂向和侧向差异。扩散作用和密度驱动的翻转作用又可以调整这种差异并达到动力平衡。封闭断层、岩性致密的低渗层等又会破坏垂向的扩散和密度翻转的动力平稳。从这些有用的分子结构特征可以推断出有用的地质信息,用于油藏描述的小层对比,断层封闭性及流动单元的划分,油水界面及古水流对油层的影响,分层工作状况及分层产量监测等,从而解决西达里亚油田中、上油组合采时油气产量劈分,为动态分析提供科学的依据。

Many factors,such as depositional environment,maturation of organic matters,hydrocarbon migration and secondary alteration,may cause difference of petroleum fingerprint,i.e.the vertical and lateral difference in reservior.However,diffusion and density overturn can adjust the difference and reach a new dynamic balance.But close fault and rocks with low permeability will destroy the balance.Therefore,some geochemical information can be used to describe reservior,such as correlation of small beds,division of faults and flow units,water/oil contact,paleowater flow.It will provide useful information for development of Xidaliya Oilfield.

https://doi.org/10.11781/sysydz199803258