利用测井资料寻找碳酸盐岩高产储层——以伊拉克库尔德地区Shakan油田侏罗系为例

doi:10.3969/j.issn.1672-7703.2018.06.011

摘要/Abstract

摘要： 伊拉克库尔德地区Shakan油田的碳酸盐岩储层在不同井、不同层段产能差距非常大,给石油地质人员带来很大困惑，如何定性评价储层，以及有效识别高产储层是迫切需要解决的问题。通过分析试油段的岩心、常规物性分析数据、铸体薄片及区域地质资料，发现高产储层段裂缝很发育，铀曲线呈现山峰状的异常高值；而低产储层段裂缝相对不发育，铀测井值低。为了深入理解铀与储层类型的关系，通过分析研究区地质构造特征、地层水资料和储层微观特征等，认为研究区具备在裂缝段产生高铀富集的条件，高铀值与裂缝发育呈正相关关系。应用自然伽马能谱曲线结合常规测井曲线资料，可以准确找出高产裂缝性储层，预测有利储层发育区，并在S-10井和S-12井试油中得到证实，为寻找高产的裂缝性储层提供了一种经济实用的方法。

关键词: 碳酸盐岩, 裂缝, 自然伽马能谱, 铀, 高产储层

Abstract: In the Shakan oilfield, the productivities of the carbonate reservoirs are very different in different intervals and different wells, making petroleum geologists very confused. It is urgent to solve how to evaluate the reservoirs, and how to identify the high-production reservoirs. Analysis of cores taken from well test intervals, conventional physical properties, casting sections and regional geological data indicates that fractures are developed, and the logging value of uranium is abnormally high in a peak shape in the high-production reservoirs, but the fractures are less developed and the logging value of uranium is low in the low-production reservoirs. According to the geological structures, formation water and reservoir microscopic characteristics, the relationship between uranium and reservoirs has been analyzed, and the result shows that uranium is rich in fractured reservoirs, and the high uranium value is positively correlated to the fracture development. Based on natural gamma ray spectrometry curves and conventional logging data, it is possible to accurately identify high-production fractured reservoirs, and predict favorable reservoirs in the Shakan oilfield. This conclusion has been verified in Wells S -10 and S-12. It is an economical and practical method for looking for high-production fractured reservoirs.

Key words: carbonate rock, fracture, natural gamma ray spectrum, uranium, high-production reservoir

中图分类号:

吴国海, 林雅平, 罗曼, 余明发, 毛海涛, 孙利国. 利用测井资料寻找碳酸盐岩高产储层——以伊拉克库尔德地区Shakan油田侏罗系为例[J]. 中国石油勘探, 2018, 23(6): 97-106.

Wu Guohai, Lin Yaping, Luo Man, Yu Mingfa, Mao Haitao, Sun Liguo. Looking for high-production carbonate reservoirs using logging data: a case of study on Jurassic in Shakan oilfield, Kurdish region, Iraq[J]. China Petroleum Exploration, 2018, 23(6): 97-106.

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