严重非均质油藏开发层系组合界限研究

STUDY ON REASONABLE DEVELOPMENT LAYER COMBINATION LIMITS OF EXTREMELY HETEROGENEOUS RESERVOIRS

严重非均质油藏随开发时间延长,层间干扰越来越严重,需要对开发层系进行调整重组。根据油藏动、静态资料,对胡7南沙三中严重非均质油藏储层渗透率、极差分布进行分析,设计长岩芯水驱油实验,利用实验确定不同渗透率岩芯动用规律;在实验基础上利用修正的数值模拟模型进行多层联合水驱动用条件下分层动用规律研究;提出用综合影响因子来反映非均质性对低渗透层动用特征、驱替效果的定量影响程度;找出不同渗透层组合的合理界限,以指导此类严重非均质油藏开发政策的制定。

The interlayer interference of extremely heterogeneous reservoirs becomes more serious as development.The layer series of development should be reconstructed.Reasonable selection is done for the permeability and the grading distribution of extremely heterogeneous reservoirs of Hu-7 Nansha-San-Zhong on the basis of the dynamic and static reservoir data to design water displacing oil long core experiment for studying production pattern of different permeability cores.On the basis of experiment,production pattern of multi-layers series of development is studied with the modified numerical simulator.An integrated contributory factor is presented to give full-scale reflection to the quantitative effect of heterogeneity on production characteristics and displacement effects of low permeability layers,and a reasonable technical limit is identified for combination of different permeable layers to give directions to practical development plan design of such extremely heterogeneous reservoirs.