新疆石油地质

›› 2015, Vol. 36 ›› Issue (2): 1-1.doi: 10.7657/XJPG20150223

• 论文 •    

扎纳若尔油田南部石炭系碳酸盐岩储集层白云岩化特征

张胜斌1，盛 寒2，金 博3，宋亚辉4   

  1. (1.中国石油 长城钻探工程公司 解释研究中心 北京 102249;2.古伯金石油天然气大学 资源勘查与勘探系,俄罗斯 莫斯科 119991;3.中国石油 尼罗河公司,北京 100034;4.中国石油 大港油田分公司 第三采油厂,天津 061723)
  • 出版日期:2019-01-01 发布日期:1905-07-12

Dolomitization in Carboniferous Carbonate Reservoir in Southern Zahnanor Oilfield in Eastern Margin of PreCaspian Basin

ZHANG Shengbin1, SHENG Han2, JIN Bo3, SONG Yahui4   

  1. (1.Geoscience Center, Great Wall Drilling Company, CNPC, Beijing100101, China;2.Department of Resource Survey and Exploration, Gubojin Petroleum University, Moscow, Russia119991;3.The Nile Company, CNPC, Beijing100034, China;4.No.3Oil Production Plant, Dagang Oilfield Company, PetroChina, Tianjin061723, China)
  • Online:2019-01-01 Published:1905-07-12

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摘要： 滨里海盆地是世界上特大型碳酸盐岩含油气盆地之一，盆地东缘石炭系碳酸盐岩是扎纳若尔油田良好的油气储集层。根据测井、岩心资料经综合对比分析后认为，扎纳若尔油田南部KT-Ⅱ含油层系Д层发育白云岩，并对白云岩化发育特征、储集层发育控制因素进行了研究。白云岩主要发育在Д1底部，随着白云石含量的增加，岩石孔隙度有增大的趋势，但在白云石含量小于20%时不明显；白云岩化并不总是增加孔隙度，只有白云岩化达到一定程度才会对岩石物性产生显著的影响，白云岩化程度过低或过高都不利于改善储集层物性。白云石含量超过80%时，岩石孔隙度会减小到6.5%左右。研究区碳酸盐岩储集层的发育受多种因素的控制，其中，白云岩化改造至关重要，对于优质储集层的发育起决定性作用。

Abstract: The Pre?Caspian basin is one of the giant oil?gas bearing basins in the world, and the Carboniferous carbonate rocks in its eastern margin are favorable hydrocarbon reservoirs. By means of logging interpretation, core analysis and contrastive analysis, existence of the Дlayer dolomite in KT?Ⅱpetroleum system in southern Zahnanor oilfield was verified for the first time. The study of the dolomitization feature and reservoir control factors show that the dolomite is mainly distributed in the bottom of Д1 layer, and the rock porosity tends to increase with the increase of dolomite content, but the trend is not obvious when dolomite content is less than20%. The dolomitization does not always increase the porosity, only a certain degree of dolomitization can significantly influence on petrophysical property, too low or too high degree of it is unfavorable to improve the reservoir quality. When the dolomite content is over80%, the rock porosity may decrease to about6.5%. The control factors on the carbonate reservoirs in this area are multiple, of which dolomitization is of great importance and crucial for the development of high quality reservoirs in this area.

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