石油与天然气地质 ›› 1987, Vol. 8 ›› Issue (2): 145-152.doi: 10.11743/ogg19870205

• 论文 • 上一篇    下一篇

山东车镇凹陷义北油田中生代煌斑岩侵入体油藏孔隙研究

周自立   

  1. 胜利油田地质科学研究院
  • 收稿日期:1986-06-05 修回日期:1986-12-15 出版日期:1987-06-25 发布日期:2012-01-16

STUDY ON THE RESERVOIR POROSITY IN MESOZOIC LAMPROPHYRIC INTRUSIVE BODY, YIBEI OIL FIELD

Zhou Zili   

  1. Geological Institute of Shengli Oilfield
  • Received:1986-06-05 Revised:1986-12-15 Online:1987-06-25 Published:2012-01-16

摘要:

在山东胜利油田,发现一个罕见的中生代煌斑岩侵入体油藏,并获得能稳产的工业油流。生油岩为下第三系沙河街组的暗色泥岩。储油的煌斑岩储集性能好,最大孔隙度为25.2%,最大渗透率为30mD,均高于相邻的砂岩储层,属孔隙型储集岩。辉石和角闪石晶溶孔是主要储集空间类型。溶解作用是在深埋期进行的,溶质来自生油岩的有机酸。构造裂缝发育,为酸性溶液运移提供了通道,对深埋期次生孔隙的形成起了重要作用。

Abstract:

A rare oil pool of Mesozoic lamprophyric intrusive body has been found on the Yihezhuang Uplift in the Chezhen Depression, North Shandong. This paper deals with the origin and distribution of porosity in the particular reser-voir rocks. The study made by means of maay petrological methods shows that: 1. The lamprophyric reservoir rocks are characterized by rich intracrystal porosity of augite and hornblende, clearly different from ordinary sedimentary reservoir rocks; 2. The porosity (5.2-25.2%) and the permeability (0.12-30 mD) are higher than that of the top and bottom sand stone reservoir rocks; 3. The secondary porosity was formed in the course of deep buried stage andthe acid organic solution came from adjacent organic rich source rocks of the Lower Tettiary (short distance migration); 4. The tectonic fractures have provided favourable passage for the migration of acid organic solution and oil; 5. The rapit evolution that started from the generation of organic solvent to hydrocarbon maturation associated with adequate fluid flux is another favour-able condition for the formation of secondary porosity. The periphery of the oil generation depression and the uplift within it are favourable targets for oil exploration when their basement faults are connected with the depression and various rocks there have fractures and easily disso-luting component.