Research and application of fracturing of separate 3 layers in shallow gas reservoir in majing gas field

Penglaizhen formation gas reservoir in Majing gas field is multiple-zone sand reservoir,but the single layer is very thin and the continuity of planar distribution is poor.The produc-tion promotion of single well with single layer by fracturing is low mostly,which has restricted production increase in single well.It is easy to carry out multiple - zone production by fracturing of sep-arate layers,for the vertical distance of several layers in single well is apart from 10 to nearly 100 meters.In recent years,fractu-ring of separate 3 layers has been carried out many times in Majing gas field,and gas production of single well with several layers has been increased obviously.Thus,the total economic benefit of gas field fracturing development has been improved effectively.