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| Keywords | |
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Zhangwu depression��Shahai Formation��diagenesis��reservoir physical property |
| Authors | |
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HONG Xue-1 |
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ZHAO Hong-Wei-1 |
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SHA Juan-Fang-2 |
| PubMed | |
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Article by Hong, X. 1 |
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Article by Diao, H. W. 1 |
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Article by Sha, J. F. 2 |
Diagenesis of clastic rock reservoirs and its influence to reservoir physical property in Shahai Formation��Zhangwu depression
HONG Xue-1, ZHAO Hong-Wei-1, SHA Juan-Fang-2
1��Exploration and Development Research Institute��Northeast Oil and Gas Brash��SinoPEC��Changchun 130062��China�� 2��Jilin Oilfield Downhole Operation Company��Songyuan 138000��Jilin��China
The reservoir of Shahai Formation in Zhangwu depression is subphase deposition of fan delta plain. Through core observation and identification��the rocks of reservoirs are mainly pebbled sandstone. On the basis of the data of casting lamella��scan electron microscope and reservoir physical property��the authors confirm the diagenesis of Shahai Formation include compaction and pressure solution��cementation and erosion-dissolution in type. The pores include primary intergranular filling��fractural��dissolution intergranular and dissolution intragranular in type��Tmax mainly ranges from 435��-455�棬placed in A stage of middle diagnetic phase��There are three‘P-K developed zones of Shahai Formation in 920.9-930.55 m, 935.8-938.9 m, 944.35-951.07 m and 944.35-951.07 m��which were controlled by rock types and diagenesis(erosion-dissolution)��