Reservoir Evaluation and Development ›› 2022, Vol. 12 ›› Issue (2): 337-344.doi: 10.13809/j.cnki.cn32-1825/te.2022.02.009

• Tight Gas Development • Previous Articles     Next Articles

Multi cluster perforation optimization design method and its application effect of tight sandstone horizontal wells in Qiulin area, central Sichuan

TANG Botao1(),ZENG Ji1,CHEN Weihua1,CHEN Yixin1,WANG Tao1,LIU Cheng2,FENG Feng3   

  1. 1. Engineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, Sichuan 610017, China
    2. Exploration Division of PetroChina Southwest Oil and Gas Field Company, Chengdu, Sichuan 610041, China
    3. Dense oil and gas exploration and Development Department of PetroChina Southwest Oil and Gas Company, Chengdu, Sichuan 610051, China
  • Received:2021-11-16 Online:2022-04-26 Published:2022-05-07


In order to solve the problems that the natural cracks of the dense sandstone reservoir in Sichuan region is undeveloped with low hole, low permeability and strong spatial heterogeneity, the transformation idea of “segment clusters created + sand + high strength long slot” is established by the indoor model experiments. On this basis, a calculation model of stress field around the wells based on the effective stress theory is established. Meanwhile, the above model is combined with the flow-stress coupling fracture extension model for horizontal wells to clarify the influence mechanism of cluster spacing on the crack competition expansion and interseam seepage interference. Therefore, the non-uniform arrangement method of cracks in the sand body of river channel considering stress interference and seepage shadow is formed. It is concluded that the optimal spacing of multiple clusters in the horizontal well section of dense sandstone in Qiulin is seven to twelve meters, which can make the opening rate of the injection cluster up to 92.3 %. This method effectively improves the effect of the transformation of the tight gas reservoirs.

Key words: hydraulic fracturing, tight sandstone, horizontal well, multi cluster perforation, seepage stress coupling

CLC Number: 

  • TE122