低渗透砂岩储层成岩相测井识别方法及其地质意义——以鄂尔多斯盆地姬塬地区长8段储层为例

doi:10.7623/syxb201105012

石油学报 ›› 2011, Vol. 32 ›› Issue (5): 820-828.DOI: 10.7623/syxb201105012

低渗透砂岩储层成岩相测井识别方法及其地质意义——以鄂尔多斯盆地姬塬地区长8段储层为例

石玉江 1,2 肖亮 3,4 毛志强 3,4 郭浩鹏 2

1西北大学地质学系陕西西安 710069； 2中国石油长庆油田公司勘探开发研究院陕西西安 710018； 3中国石油大学油气资源与探测国家重点实验室北京 102249； 4中国石油大学地球探测与信息技术北京市重点实验室北京 102249

收稿日期:2010-12-12 修回日期:2011-06-25 出版日期:2011-09-25 发布日期:2011-11-28
通讯作者: 石玉江
作者简介:石玉江，男，1971年1月生， 1996年毕业于石油大学（华东），现为中国石油长庆油田勘探开发研究院高级工程师、西北大学在读博士研究生，主要从事测井地质综合研究及测井新技术应用工作。
基金资助:
中国石油天然气集团公司应用研究项目(2009-119)资助。

An identification method for diagenetic facies with well logs and its geological significance in low-permeability sandstones：A case study on Chang 8 reservoirs in the Jiyuan region, Ordos Basin

SHI Yujiang 1,2 XIAO Liang 3,4 MAO Zhiqiang 3,4 GUO Haopeng 2

Received:2010-12-12 Revised:2011-06-25 Online:2011-09-25 Published:2011-11-28

摘要/Abstract

摘要：

在对鄂尔多斯盆地姬塬地区长8段储层绿泥石衬边弱溶蚀成岩相、不稳定组分溶蚀成岩相、压实致密成岩相、高岭石充填成岩相和碳酸盐胶结成岩相常规测井响应特征进行分析的基础上，提出利用中子测井、密度测井以及中子-密度视石灰岩孔隙度差，辅助以自然伽马和电阻率测井曲线，连续定量识别储层成岩相的方法，并建立了相应的储层成岩相测井识别图版。利用该图版对黄36井测井资料进行了处理，通过与薄片鉴定结果的对比，验证了图版的准确性。利用成岩相识别结果，划分储集层的类型和产能级别：绿泥石衬边弱溶蚀成岩相储层是姬塬地区最有利储层，对应的含油级别划定为A级；不稳定组分溶蚀成岩相储层是第二类储层，对应含油级别划定为B级；含碳酸盐胶结成岩相夹层的储层产油能力最弱，是第三类储层，对应的含油级别划定为C级。

关键词: 低渗透砂岩, 成岩相, 中子-密度视石灰岩孔隙度差, 储层类型, 产能级别

Abstract:

Based on analyses of characteristics of conventional log responses to five different diagenetic facies in Chang 8 reservoirs of the Jiyuan region, Ordos Basin, such as diagenetic facies of weak corrosion with chlorite mat, corrosion of unstable components, compaction density, kaolinite filling and carbonate cementation, we proposed a method to continuously identify diagenetic facies quantitatively by means of neutron and density log data, and the neutron-density apparent porosity divergence of limestones aided by natural gamma ray and resistivity log curves, and established a corresponding identification chart for diagenetic facies in reservoirs. Actual log data of Well Huang-36 were processed using this chart and its veracity was validated by comparing the processed result with the thin-section analysis result. Reservoir types and productivity levels were classified using these identification results. Three types of reservoirs were graded according to their diagenetic facies as follows: the diagenetic facies of weak corrosion with chlorite mat was the most favorable reservoir in the Jiyuan region and its oil productivity level corresponded to Grade A; the diagenetic facies of corrosion of unstable components was attributed to the second type of reservoirs, with the oil productivity level defined as Grade B; and the diagenetic facies interbedded with carbonate cementation was of the weakest oil productive capacity, defined as the third type of reservoirs and Grade C of the productivity level.

Key words: low-permeability sandstone, diagenetic facies, neutron-density apparent porosity difference of limestone, reservoir type, productivity level

石玉江肖亮毛志强郭浩鹏. 低渗透砂岩储层成岩相测井识别方法及其地质意义——以鄂尔多斯盆地姬塬地区长8段储层为例[J]. 石油学报, 2011, 32(5): 820-828.

SHI Yujiang XIAO Liang MAO Zhiqiang GUO Haopeng. An identification method for diagenetic facies with well logs and its geological significance in low-permeability sandstones：A case study on Chang 8 reservoirs in the Jiyuan region, Ordos Basin[J]. Editorial office of ACTA PETROLEI SINICA, 2011, 32(5): 820-828.

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低渗透砂岩储层成岩相测井识别方法及其地质意义——以鄂尔多斯盆地姬塬地区长8段储层为例

An identification method for diagenetic facies with well logs and its geological significance in low-permeability sandstones：A case study on Chang 8 reservoirs in the Jiyuan region, Ordos Basin

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