扎纳若尔油田南部石炭系碳酸盐岩储集层白云岩化特征  

Dolomitization in Carboniferous Carbonate Reservoir in Southern Zahnanor Oilfield in Eastern Margin of Pre-Caspian Basin

作　　者：张胜斌 盛寒 金博 宋亚辉 

机构地区：[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　　处：《新疆石油地质》2015年第2期244-248,共5页Xinjiang Petroleum Geology

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。The Pre-Caspian basin is one of the giant oil-gas bearing basins in the woad, and the Carboniferous carbonate rocks in its east- ern margin are favorable hydrocarbon reservoirs. By means of logging interpretation, core analysis and eontrastive analysis, existence of the layer dolomite in KT- Ⅱ petroleum system in southern Zahnanor oilfield was verified for the first time. The study of the dolomitization fea- ture and reservoir control factors show that the dolomite is mainly distributed in the bottom of Д layer, and the rock porosity tends to in- crease with the increase of dolomite content, but the trend is not obvious when dolomite content is less than 20%. 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 over 80%, the rock porosity may decrease to about 6.5%. The control factors on the carbonate reservoirs in this area are multiple, of which dolomitization is of great importance and cru- cial for the development of high quality reservoirs in this area.

关 键 词：滨里海盆地 扎纳若尔油田 碳酸盐岩 石炭系 白云岩化 储集层 

分 类 号：TE112.221[石油与天然气工程—油气勘探]