Application of Factory Drilling Technology in Block Su 53

Sulige Gas Field is a typical tight gas reservoir,which displays poor physical properties such as low-pressure,low-permeability,low-abundance,low production rate for single well,and poor economics.To improve production and economic benefit,combined the gas-bearing characteristics with the drilling conditions,and through continuous explorations and practices,an applicable "factory drilling" model was instituted.In this case,"factory drilling" involved optimizing design of exploration and drilling operations,streamlining engineering,launching an assembly-line drilling operation,standardizing regulations,establishing a comprehensive utilization of resources and uniform and integrated crew management as its foundation.The optimized design included geology,drilling and fracturing design.The engineering module included the PDC bit selection and matched technical modules.Assembly-line drilling operation involves batch drilling in the same section and continuous fracturing according to the situation.Standardized regulations involve the rules and protocols for factory drilling,completion and fracturing.Factory drilling increased the operation efficiency,shortened the drilling period and reduced costs in Block Su 53.The operation of well site construction,drilling,completion,fracturing,gas testing and production for 13 wells(10 horizontal wells,two directional wells and one vertical well)from one pad was finished in only 210 days.The single well recovery for 13 wells was increased significantlyusing the factory approach after large-volume simultaneous hydraulic fracturing.