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| Experimental analysis on micro anisotropy of Chang 8 reservoir in Heshui area, Ordos Basin |
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CHEN Jie1, ZHOU Ding wu2
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(1.College of Geo Resources and Information in China University of Petroleum, Dongying 257061, China;2.College of Geological Science and Engineering in Shandong University of Science and Technology, Qingdao 266510, China)
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| Abstract: |
| The micro anisotropy of Chang 8 reservoir in Heshui area in Ordos Basin was analyzed by real sandstone micro pore model experiment. The results show that Chang 8 reservoir has heavy micro anisotropy, and the better the quality of the reservoir is, the heavier the micro anisotropy is. The sedimentary microfacies and dissolution are the main factors affecting the micro anisotropy. The micro anisotropy is the inner reason affecting the oil displacement effect of waterflooding and remaining oil distribution. Based on a large sum of research on the four main types of pore structures of Chang 8 reservoir in study area, it is better to make three types of waterflooding development schemes according to the experimental results, the remaining primary pores between grains and the dissolved pores belong to the first one, the micro cracks belong to the second one, and the micro pores between subsequent mineral belong to the third one. |
| Key words: Ordos Basin Heshui area Chang 8 reservoir micro anisotropy real sandstone micro pore model |
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