扶余油田泉四段剩余油分布规律及挖潜有利区带预测

针对扶余油田泉四段储层地质研究现状及不足,综合利用地震、测井、钻井、化验分析资料,以储层地质学及沉积岩石学为指导,首先开展小层划分与对比、沉积微相、微构造、储层特征等方面的基础工作,并在此基础上进行剩余油分布规律研究并预测了有利挖潜区带。研究表明研究区泉四段可划分为13个小层,主要储集砂体为三角洲平原分支河道和三角洲前缘水下分支河道,储层经历了机械压实、胶结等成岩作用,次生孔隙不发育,总体上属于中孔-中渗性储层。沉积微相展布及储层的岩性、物性、非均质性是研究区泉四段剩余油分布的主控因素,正向微构造,断阶及河道侧翼等区域剩余油潜力较大,I类潜力区是下一步挖潜工作的重点区域。

Distribution of Remaining Oil and Favorable Potential Zone Prediction of Quan 4th Member in Fuyu Oilfield

Basic researches on the reservoir geology of Quan 4th Member in Fuyu oilfield are insufficient. In this paper, based on the integrated information of seismic data, logging data, drilling data and chemical examination data, guided by the reservoir geology and sedimentary petrology, the strata classification and contrast were carried out as well as study on sedimentary microfacies, microtectonics, reservoir characteristics;On the basis of previous research, the distribution of remaining oil and favorable potential zone prediction were analyzed. The research results show that the Quan 4th Member can be divided into 13 substratums in detail on isochrono stratigraphic correlation. The major reservoir sand bodies were deposited in distributary channels of delta plain subfacies and subaqueous distributary channels of delta front subfacies. Mechanical compaction, cementation and other effects are chief diageneses of the reservoir. Primary pores are the main ones of the reservoir, which are totally a middle porosity and permeability sandstone reservoir. Sedimentary microfacies distribution, reservoir lithology and physical property, and reservoir heterogeneity have main effect on the remaining oil distribution. Normal microtectonics, fault terrace, river channel flank are favorable potential zones. The I class potential area is the next key point of exploration area.