西南石油大学学报(自然科学版) ›› 2010, Vol. 32 ›› Issue (3): 80-84.DOI: 10.3863/j.issn.1674-5086.2010.03.014

• 石油与天然气工程 • Previous Articles     Next Articles

EXPERIMENTAL STUDY ON AND FIELD APPLIANCE OF PROPPANT CONDUCTIVITY IN ALTERNATING FORMATIONS OF SANDSTONE AND SHALE

XIN Jun1 GUO Jian-chun1 ZHAO Jin-zhou1 CUI Rong-jun2 WANG Jian3   

  1. 1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation，Southwest Petroleum University，Chengdu Sichuan 610500，China；2.Working District of Shixi，Xinjiang Oilfield Company，CNPC，Karamay Xinjiang 834000，China；3.Petroleum Development Center of Shengli Oilfield，SINOPEC，Dongying Shandong 257000，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-06-20 Published:2010-06-20

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Abstract: In the fracturing operation of alternating formations of sandstone and shale，the flow conductivity capacity of proppant fracture gets worse due to multiple fractured layers and thin layers，narrow width of generated fractures and a large amount of proppants being embedded.The factors affecting the fracture conductivity are researched in order to match the parameters of fracture and formation，such as different size of proppants，sanding concentration，proppant embedment and so on.On the basis of that，the study on different combination of proppant is carried out.It is indicated that although there is a greater difference between the flow conductivity capacity of 20/40 mesh and 16/30 mesh combination size and that of 16/30 mesh proppant when closure pressure is lower，as the closure pressure rises，the fracture flow conductivity capacity of combination proppants （20/40∶16/30=3∶1） is close to the flow conductivity capacity of single proppant （16/30 mesh）.By optimizing the ratio of combination proppant in well Y34-38，considerable result is achieved after fracturing.

Key words: alternating formations of sandstone and shale, grain size, sanding concentration, proppant embedment, fracturing

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