Gas Drilling Technology for Achieving Efficient Development of Tight Gas
The serious and even fatal water lock damage cannot be avoided or eliminated at tightsand reservoirs in China by using the technology system of drilling,completion and fracturing are all with water-based fluids.This leads to low production and low efficiency,and even development failure.Even the popular horizontal well seg-mented fracturing technology also cost lot with low benefit due to water lock damage.Currently,gas drilling is the only way to completely eliminate water lock damage.By analyzing the geological characteristics of tight gas and the reservoir damage during exploration and development,this paper points out the advantages of gas drilling tech-nology in tight gas exploration and development,and advocates the use of gas drilling technology in tight gas ex-ploration and development to improve the discovery and development of reservoirs.Taking the well of Tarim DX1 as an example,the gas drilling technology for tight gas exploration is demonstrated.Taking Sichuan Basin gas drilling vertical wells,inclined wells,and horizontal wells as examples,the gas drilling technology used for shal-low tight gas development is demonstrated.Taking Tarim DB104 well as an example,gas drilling technology for deep tight gas development is demonstrated.Finally,it is pointed out that gas drilling is a new technology for ex-ploration and development of tight gas,and there are still many technical problems to be solved,especially the matching technology of gas drilling in horizontal wells.However,these technologies should be solvable at the cur-rent level of science and technology and industry,and what is needed is attention,input and persistence.
tight gasexploration and developmenthydraulic fracturinggas drilling technology