基于巖性相單元的低孔低滲碎屑巖儲層質(zhì)量精細評價——以珠江口盆地HZ25-7構(gòu)造古近系文昌組為例
[Abstract]:In view of the complex lithology and large change of physical properties encountered in the exploration and evaluation of deep system reservoirs, taking the low porosity and low permeability reservoirs of the HZ25-7 structure of the Paleogene Wenchang formation of the Paleogene in Pearl River mouth Basin as an example, the high resolution advantage of vertical stratification of electric imaging logging is used. On the basis of macroscopic lithology identification and sedimentary stratigraphic structure interpretation, 14 lithofacies types are divided into 14 lithofacies types taking microscale lithologic facies as units, and the lithologic facies assemblage sequences within two channel units in the target section are analyzed. The characteristics of reservoir heterogeneity are revealed. According to core physical properties analysis and calibration of conventional logging and electrical imaging logging, physical property evaluation of various lithologic facies units is carried out. The results show that, in the same diagenesis background, the grain size and sedimentary stratigraphic structure control the physical properties obviously: with the grain size changing from coarse to fine, the bedding structure changes from trough interlaced bedding, plate interlaced bedding to block bedding. The physical properties of the reservoir are getting worse. In order to find high quality reservoir in Wenchang formation, the high energy sedimentary facies unit with coarse lithology and interlaced bedding in the upper part of the channel unit should be the main target.
【作者單位】: 中海油田服務(wù)股份有限公司;中海石油(中國)有限公司深圳分公司;
【基金】:中國海洋石油總公司“十二五”重大科技項目“中國近海低孔低滲油氣藏勘探開發(fā)關(guān)鍵技術(shù)與實踐(編號:CNOOC-KJ 125ZDXM 07 LTD)”部分研究成果
【分類號】:P618.13
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1 黃凱;楊U,
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