RECOVERY OF LOW-PRODUCTION SMALL GAS WELLS BY PREVENTING POTENTIAL RISKS

According to Safety Technical Codes for Engineering Works in Natural Gas Wells, Q/SH0003.1-2004 in oil industry, those abandoned wells without any value on industrial production must be killed and plugged in order to avoid any possible damage or dangers. Though it is a fact that those abandoned wells have been threatened the vicinity security at well sites, adopting pressurized cementing means in order to kill and plug those wells will not only increase the cost input but completely lose any possibility to get much more potential source. Therefore, according to different compositions of natural gas from an individual well, this study selected the technology accordingly by the chart of desulfurization → dehydration → further dehydration → boost pressure → transmission → customers. If killing wells followed after much more gas being fully explored, this paper concluded that benefits would be obtained from this way as follows: (1) the occupied well sites would be revived to lands for crops and trees; (2) more and more deserted gas would be recovered; (3) residents nearby the well sites would be protected from any possible dangers; (4) gas-bearing formations would be further studied for future exploration and development around this area.