Guandong Su

TL;DR: Protein sequence analysis shows that Clostridium sp.

TL;DR: Wang et al. as discussed by the authors used fuzzy-ball drilling fluid to control wellbore instability and lost circulation in approximately 1000 coal bed methane wells by using a classical collapse pressure prediction mathematical model that contains these mechanical parameters.

TL;DR: F fuzzy-ball drilling fluids are feasible for fragile ecosystem protection in coalbed methane well plants, reconciling the conflict between environment-protecting and cost-reducing.

TL;DR: In this paper, the average and relative formation damage in coal bed methane reservoirs were calculated and analyzed using a simple ranking method, statistical screening algorithm, and theoretical method, and the results showed that there is a regular distribution of absolute reservoir damage measured by the laboratory methods; and second, the application priority of permeability measurement methods for formation damage evaluation in coal-bed methane reservoirs is as follows: cuttings pulse decay method, constant flow rate method, nuclear magnetic resonance method, plunger pulse decay, and pressure oscillation method.

TL;DR: In this article, a special fuzzy-ball temporary blocking fluid (FTBF) was designed to effectively mitigate the formation damage through the refracturing operation, and the performance of the FTBF was analyzed via experiments, application to two case studies, and its formation damage mitigation mechanisms.