辽河CYT油田C9块沙一段储层特征研究

Reservoir characteristics of Sha-1 member in C9 block,CYT Oilfield,Liaohe Basin

CYT油田C9块沙一段为扇三角洲前缘沉积,是该区含油目的层。本文在岩心化验分析及测井资料解释的基础上,结合沉积微相,对沙一段储层的岩石学特征、物性及非均质性进行了研究。结果表明,C9块沙一段储层主要岩石类型为石英砂岩;储层物性条件好,为中—高孔、中—高渗型,物性呈现出北东向南西逐渐变差的趋势;根据对渗透率变异系数、突进系数和渗透率级差的分析,得出储层非均质性强,对该区储层特征研究、改善油藏开发效果提供了依据。

The member Es1 of C9block in CYT Oilfield is a major hydrocarbon containing target,which is mainly the fan delta front deposits.Based on core analysis,log interpretation,and sedimentary microfacies,we conduct a research on lithology characteristics,physical property and reservoir heterogeneity.The results show that the reservoir rock of C9block is mostly quartz sandstone and reservoir physical property is a sandstone reservoir with medium-high pore and medium-high permeability. Affected by sediment source,physical property gradually become worse from northeast to southwest.The reservoir shows a strong heterogeneity according to the analysis of permeability variation coefficient,onrush coefficient,permeability differences.This study provides useful information for the future reservoir development.