Analysis on the applicability of CBM development technologies in the Shizhuang South Block of the Qinnan Basin

In China, average single-well production of coalbed methane (CBM) is lower, so it is in urgent need to find the way to increase single-well CBM production rapidly. The key to improve CBM development benefit is to select the scientific support engineering technologies based on the geological conditions of different coal reservoirs. In this paper, the Shizhuang South Block in the Qinnan Basin was taken as an example. Based on sufficient experimental data and engineering practice, the dominant geological factors influencing CBM development effects were pointed out, the advantages, disadvantages and applicability of existing drilling and completion technologies were summarized, and the development technologies suitable for the geological characteristics of the study area were selected. It is indicated that the main geological factors influencing CBM development effects of Shizhuang South Block are ground stress, coal structure and geological structure. As for the low-permeability reservoirs with similar geological characteristics to Shizhuang South Block, horizontal well is the effective development technology. Faults have greater effects on CBM development.