Controlling effects of sand body structural characteristics on oil reservoirs of Chang 8<sub>1</sub> oil layer in Jiyuan area

Qiu Xiangliang; Chen Xiaodong; Ding Li; Tan Yuhan; Huang Qiong

doi:10.19509/j.cnki.dzkq.2020.0507

Volume 39 Issue 5

Sep. 2020

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Article Navigation > Bulletin of Geological Science and Technology > 2020 > 39(5): 87-96

Qiu Xiangliang, Chen Xiaodong, Ding Li, Tan Yuhan, Huang Qiong. Controlling effects of sand body structural characteristics on oil reservoirs of Chang 81 oil layer in Jiyuan area[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 87-96. doi: 10.19509/j.cnki.dzkq.2020.0507

Citation:

Qiu Xiangliang, Chen Xiaodong, Ding Li, Tan Yuhan, Huang Qiong. Controlling effects of sand body structural characteristics on oil reservoirs of Chang 8₁ oil layer in Jiyuan area[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 87-96. doi: 10.19509/j.cnki.dzkq.2020.0507

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Controlling effects of sand body structural characteristics on oil reservoirs of Chang 8₁ oil layer in Jiyuan area

doi: 10.19509/j.cnki.dzkq.2020.0507

Received Date: 21 Sep 2019

Abstract

Abstract

As the main development strata in Jiyuan area, Chang 8₁ oil layer has a staggered superimposed relationship of sand bodies, which seriously affects the reservoir distribution in this area.The study on the structural characteristics of the sand bodies in Chang 8₁ oil layer and their control effects on reservoir distribution is carried out, which is beneficial to the continuous exploration and development in Jiyuan area. Based on the formation mechanism of sand bodies in Chang 8₁ oil layer, the sedimentary and logging data were combined to divide the structural types of sand bodies, and the relationship between transverse interlacing and longitudinal superposition of sand bodies was described. Further, the control effects of sand body structure on reservoir distribution were clarified. Results show that the sand body structure in Jiyuan area can be divided into four types, including superimposed box shape, toothed bell shape, isolated box shape and isolated finger shape. The superimposed-box-shape sand body has good oiliness and is the main reservoir body. The top and bottom of the toothed-bell-shape and isolated-box-shape sand body have poor oiliness, but the middle part of them has good and uniform oiliness. The isolated-finger-shape sand body's physical properties and oiliness are poorer. The sand body structure in this area is significantly related to the distribution of favorable reservoirs. Most of the superimposed-box-shape sand bodies are of type I favorable reservoir. The result can provide the basis and direction for delicate exploration and development of Chang 8 reservoir in Jiyuan area.
- Jiyuan area,
- pay set Chang 8₁,
- sand body structure,
- sand body oilness,
- reservoir distribution

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Controlling effects of sand body structural characteristics on oil reservoirs of Chang 8₁ oil layer in Jiyuan area

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Controlling effects of sand body structural characteristics on oil reservoirs of Chang 81 oil layer in Jiyuan area

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Controlling effects of sand body structural characteristics on oil reservoirs of Chang 8₁ oil layer in Jiyuan area