红井子地区长9_1油藏储层特征研究与评价

根据钻井、测井及分析鉴定资料,红井子地区长91砂岩储层的岩石学特征复杂,岩屑及填隙物较多,成岩作用类型多样,孔隙结构类型以粒间孔为主,其次为长石溶孔,少量浊沸石溶孔和岩屑溶孔,属于低孔-低渗储层。砂岩碎屑成分、粒度大小、沉积微相、成岩作用是影响储层物性的主要因素。通过对红井子地区长91储层孔隙度、渗透率、饱和度以及砂体厚度4个参数进行聚类分析,并结合铸体薄片、岩心观察及试油的结果,建立了红井子地区长91储层综合分类标准,最终优选长91油气聚集的有利储层类型。

Research and evaluation of the Chang91 reservoir characteristics in Hongjingzi region

According to the drilling, logging and analysis of identification information,in Hongjingzi region,Chang91 sandstone reservoir have complex rock characteristics: With more rock debris and interstitial material 、 various types of diagenesis, the pore structure of the main types of intergranular pores as, followed by feldspar dissolution pores, a small amount of laumontite dissolution pores and debris dissolved pore,it is the low porosity - permeability reservoir. Sandstone detrital composition, grain size, sedimentary micro-facies, diagenesis is the main factor to affect the reservoir properties. By analyzing of the degree of red well sub-region chang91 reservoir porosity, permeability, saturation, and the thickness of the sand body four parameters, and combined with the results of casting thin sections, the core observation and testing oil, we established classification criteria of the chang91 reservoirs. Through the above research, we optimized favorable reservoirs of chang91 oil and gas accumulation.