TY  - EJOU
AU  - Li, Fang 
AU  - Wu, Juan 
AU  - Yi, Haiyong 
AU  - Wu, Lihong 
AU  - Du, Lingyun 
AU  - Zeng, Yuan 

TI  - Evaluation of Well Spacing for Primary Development of Fractured Horizontal Wells in Tight Sandstone Gas Reservoirs
T2  - Fluid Dynamics \& Materials Processing

PY  - 2024
VL  - 20
IS  - 5
SN  - 1555-2578

AB  - Methods for horizontal well spacing calculation in tight gas reservoirs are still adversely affected by the complexity of related control factors, such as strong reservoir heterogeneity and seepage mechanisms. In this study, the stress sensitivity and threshold pressure gradient of various types of reservoirs are quantitatively evaluated through reservoir seepage experiments. On the basis of these experiments, a numerical simulation model (based on the special seepage mechanism) and an inverse dynamic reserve algorithm (with different equivalent drainage areas) were developed. The well spacing ranges of Classes I, II, and III wells in the Q gas field are determined to be 802–1,000, 600–662, and 285–400 m, respectively, with their average ranges as 901, 631, and 342.5 m, respectively. By considering both the pairs of parallel well groups and series well groups as examples, the reliability of the calculation results is verified. It is shown that the combination of the two models can reduce errors and provide accurate results.
KW  - Well spacing for primary development; tight gas reservoir; fractured horizontal well; threshold pressure gradient; stress sensitivity

DO  - 10.32604/fdmp.2023.043256