夫特砾岩油藏微相韵律特征及对开发的影响

MICROFACIES RHYTHMIC CHARACTERISTICS OF FUTE CONGLOMERATIC OIL POOL AND THEIR EFFECTS ON DEVELOPMENT

梁官忠 张满库 何国安

Liang Guanzhong Zhang Manku He Guoan

华北油田二连分公司, 内蒙, 锡林 026000

Erlian Company, North China Oilfield, Xilin, Nei Monggol 026000, China

作者在岩心观察描述的基础上,综合应用测井解释资料,开展了对夫特砾岩油藏沉积微相的划分及韵律特征的研究.他们认为,阿三段沉积时期,该区接受来自两个物源方向的碎屑沉积,形成两种截然不同的储集岩体.其中主体的砾岩储集体属扇三角洲前缘沉积,并可细分为6种微相.不同的沉积微相中,砂体的展布、物性和油层发育程度不同,且具有不同的韵律模式;而不同沉积微相、韵律特征的储集层具有不同的开发特征.平面油水运动规律主要受沉积微相的控制,纵向油水运动规律主要受渗透率韵律模式的影响.最终,作者运用微相与韵律模式研究成果对油藏的注采井别、层系提出了合理的调整建议,并见到良好效果.

On the basis of core observation and description,the depositional microfacies of Fute conglomeratic oil pool are divided and their rhythmic characteristics are studied by the comprehensive application of well logging interpretation data.It is considered that the district received clastic sediments from two matter source directions during the Asan sedimentation period and formed two completely different reservoir rock bodies.Between them,the master conglomeratic reservoir rock body,which belongs to fan delta frontal deposit,can be further divided into six microfacies.Different depositional microfacies have different extension,physical properties and reservoir developing degree for sand bodies,and possess distinct rhythmic patterns;and reservoirs with different depositional microfacies and rhythmic characteristics have different development features.Plane oil-water movement regularities are mainly controlled by depositional microfacies,while longitudinal oil-water movement regularities are mainly affected by the rhythmic patterns of permeability.At last,rational readjustment suggestions about the injection-production wells and measures of the oil pool are advanced by use of microfacies and rhythmic pattern study achievements,and good effects are obtained.

https://doi.org/10.11781/sysydz200101067