Petroleum Reservoir Evaluation and Development ›› 2021, Vol. 11 ›› Issue (6): 897-904.doi: 10.13809/j.cnki.cn32-1825/te.2021.06.015

• Comprehensive Research • Previous Articles     Next Articles

Numerical simulation of spatial-braided bow-shape well pattern development in shallow tight reservoir

FENG Ning1,2(),PENG Xiaolong1,XUE Xiaojun2,WANG Chaowen1,DENG Peng1,WU Haoqiang1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
    2. CNPC Xibu Drilling Engineering Company Limited, Karamay, Xinjiang 834000, China
  • Received:2021-01-22 Online:2021-12-26 Published:2021-12-31


In shallow tight reservoirs, the hydraulic fracturing tends to produce horizontal fractures. For the horizontal wells, multi-stage fracturing is easy to generate only one large horizontal fracture, which leads to poor stimulation effect. However, the single well mode of “bow-shape horizontal well + multi-stage horizontal fractures” can not effectively explore this kind of reservoir. In order to further improve the production degree of shallow tight reservoir, the development mode of spatial-braided well pattern in shallow tight reservoir is proposed based on the feasibility of shallow reservoir drilling, and the numerical simulation is used to verify the effectiveness of spatial-braided well pattern. The numerical simulation results show that under the same number of wells and drilling footage, the oil production, cumulative oil production and reservoir recovery degree of spatial-braided well pattern are higher than those of the opposite well pattern and staggered well pattern. However, with the expansion of the fracture scale in horizontal fracturing, the gap with staggered well pattern decreases. At the same time, according to the simulation, the reverse 7-point pattern water injection not only replenishes the formation energy, but also changes the seepage state, so that the remaining oil in the regional edge and between wells can be effectively displaced, and the recovery rate is significantly improved. The researches provide efficient development method for the efficient development of shallow tight reservoir.

Key words: shallow reservoir, tight reservoir, horizontal well, bow-shape well, spatial-braided well pattern

CLC Number: 

  • TE349