The distributed optical fiber temperature monitoring technology is gradually being used to monitor the downhole production of fractured horizontal wells. However

it is still a huge problem to interpret the production profile of fractured horizontal wells quantitatively based on DTS data in low permeability gas reservoirs. In view of this

this study established the method

first

the temperature data preprocessing

and then

on the basis of the principle of conservation of mass and energy conservation of horizontal wells in low permeability gas reservoir fracturing coup

ling temperature forward model

finally using a variety of traffic data of mathematical methods of inversion layers

forming a set of monitoring based on distributed optical fiber temperature measurement technology of horizontal wells in low permeability gas reservoir fracturing of output profile processing and interpretation methods.The actual data processing of fractured horizontal well 5 was carried out by using the established method.The results show that the forward temperature fitting curve is basically consistent with the original temperature curve

which indicates the rationality and accuracy of the forward model.In addition

the calculated absolute errors of daily gas production of the five wells were between 100 m

3

and 1 712 m

3

and the absolute errors of daily water production are between 0.7 m

3

and 1.8 m

3

. The errors are small and meet the production requirements. All these provided technical support for the development of low permeability gas reservoirs.