Practice and understanding of key technology of slimming well drilling in Fuling shale gas field
In order to improve the development efficiency and drilling efficiency and to reduce drilling cost,the optimization design technology of casing program slimming is adopted in Fuling shale gas field.In order to meet the requirements of fracturing stimulation and gas production,two kinds of casing program slimming schemes are proposed by means of modeling and data statistical analysis,and in view of the technical difficulties of slimming well drilling,the optimization and practice of four technologies including personalized drill bit,drill assembly,drilling parameters and directional instrument structure are carried out.Field application shows that after the casing program slimming,the rate of penetration is significantly increased,the drilling cycle is further shortened,the electricity consumption of a single well is reduced by 37.5％,the amount of drilling cuttings is reduced by 19％-39％,and the solid waste can be reduced by tens of thousands of cubic meters per year,reducing the oil field safety and environmental protection pressure.This technology provides a reference for the beneficial development of other domestic shale gas fields.
shale gas fieldhorizontal wellcasing program slimmingdifficulty analysiskey technology
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