| 黄骅坳陷三马地区中深层储层孔隙发育及主控因素分析 |
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| 关键词:Huanghua depression (Sanma area) reservoir rocks diagenesis pore evolution geochemistry controlling factor |
| 基金项目:中国石油天然气集团公司中青年创新基金项目(编号:Cx2000-8) |
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| Distribution Characteristics of Pores in Medium-Deep Clastic Reservoir Rocks of Sanma Area,Huanghua Depression and Its Controlling Factors |
| The types, microstructures, distribution and evolutionary characteristics of pores in Paleogene medium-deep clastic reservoir rocks of Sanma area, Huanghua depression, have been discussed in this paper. The result shows that the distribution and evolution of porosity in clastic reservoir rocks vary obviously with the increasing burial depth of the reservoir rock. There exist three evolutionary stages and accordingly the reservoir porosity can be classified into three zones: the zone of primary pores, that of transitional pores and that of secondary pores. The depths of the three zones are shallower than 2 200 m, from 2 200 to 3 400 m and greater than 3 400 respectively. The primary porosity is unimportant in medium-deep reservoir rocks, whereas the secondary pores occupy the main part. There are three secondary pore zones in medium-deep reservoir rocks, with the depth being from 3 200 to 3 500 m, from 3 600 to 4 000 m and from 4 200 to 4 500 m respectively. The secondary pores include mainly intergranular dissolved pores, intra-granular dissolved pores, mould pores and microcracks. The decrease of the primary porosity results mainly from compaction or cementation. The main factors responsible for the development of secondary pores are corrosion of quartz and feldspar or transformation of minerals. This paper also deals with the primary geological and/or geochemical factors controlling diagenesis and pore evolution of reservoir rocks, which include lithofacies, lithology, geochemical charateristics of water in pores (organic acid content), early calcite cementation, early hydrocarbon filling and abnormal high-pressure of fluids in pores. |
| CHANG Xing-hao,ZHANG Zhi-huan,LI Yan-xia,WANG Ze-zhong,ZHONG Ning-ning,WU Shui-ping,ZHANG Xiu-chun.2005.Distribution Characteristics of Pores in Medium-Deep Clastic Reservoir Rocks of Sanma Area,Huanghua Depression and Its Controlling Factors[J].Acta Geoscientica Sinica,26(1):75-82. |
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