Research Shale Gas Horizontal Drilling Technology Weiyuan, Changning District

Shale gas is occurrence in rich organic matter in the mud shale and interlayer, adsorption or free state as the main form of unconventional natural gas, and composition with methane is given priority to, is a kind of clean and effective energy resources. Shale gas reservoir as the density of unconventional gas reservoir, the foreign got good grades on shale gas drilling. Shale gas resources are rich in our country, the development and utilization of shale gas resource has a broad prospect, but for shale gas reservoir exploration and development of late, currently only vying in sichuan, changning district experimental exploration for shale gas horizontal well. Compactness in low permeability shale gas drilling and conventional drilling methods, low capacity, economic benefit is poor, cannot form industrial scale development and utilization. The horizontal well drilling method is an effective means to increase production capacity, but the sharp rise in horizontal well is bound to make the drilling cost.At home and abroad in this paper, research a lot of literature, followed by the latest research results of shale gas horizontal well drilling technology, the basic characteristic and distribution of shale gas. shale gas drilling technology research status and the difficulties of shale gas drilling and completion technology, etc are studied, and in view of hubei vying, changning block shale research and analyze horizontal well drilling technology, formed a vertical section of fast drilling, optimization of well bore structure, trajectory control, drilling fluid system and performance control, prevent collapse vying, changning district, such as horizontal well drilling technology system related. Can not only solve the borehole wall stability, easy card along the horizontal section, difficult to make the hole trajectory control, but also help safe drilling and improve drilling speed, energy conservation, environmental protection, to reduce the drilling cost, for the development and utilization of shale gas, such as inefficient resource is of great significance.