大情字油田青一段储层宏观非均质性及影响因素分析

Study on macro heterogeneity and its influence factors of Qing1 member in Daqingzi oilfield

储层的非均质性是影响油气藏油、气、水渗流及油气采收率的主要因素之一,因此,进行储层非均质性研究,找出其影响规律,对于搞清油藏剩余油的分布、采取合理性措施、提高采收率显得十分必要。大情字油田青一段为低渗、特低渗油藏,综合运用岩心砂岩薄片、铸体薄片、扫描电镜、X-衍射分析等资料,对储层的层内、层间和平面非均质性等方面进行了分析。研究表明大情字油田青一段储层宏观非均质性严重,认为非均质性主要受控于储层的沉积微相及成岩相,埋深对储层非均质性也有一定的影响。

Reservoir heterogeneity was the main reason affecting the recovery factor and the percolation of water, oil and gas. So it was quite necessary to study the reservoir heterogeneity, find out the influence law, clarify the remaining oil distribution, and take reasonable measures and enhance factor. The reservoir in the first member of the Qingshankou formation in Daqingzi oilfield is low and extra-low in porosity and permeability. The analysis was made on the inner layer,interlayer and the plane heterogeneity of the reservoir by comprehensive application of the data of the cores thin slices,casting lamella,electron microscope scanning and X-diffraction. The research showed that the main objective reservoir in Daqingzi oil field had high heterogeneity, the macro heterogeneity was controlled by these continental micro-facies and digenetic facies of reservoirs, and the buried depth had a certain influence on the reservoir heterogeneity.