Acid Pressure Of The Gas Field Horizontal Well In The 1st Tower Modification Technology Research And Applications

The acid fracturing treatment of horizontal well was extensively used in carbonatite reservoir of Tarim, but owing to length hole section, aeolotropism, uncertainty of fluid loss property etc, the actual fracture morphology usually deviated from expectedness, increase production was disappointed. Sectionlization of the hole was an advisable way in the acid fracturing treatment of horizontal well. This paper researched the carbonatite reservoir acid fracturing treatment of horizontal well in Tazhong I gas field.First, the carbonatite reservoir characteristic of Tazhong I gas field was described as the base of the research. Second, the polytechnic of acid fracturing treatment of horizontal well was advanced and tested. From this paper, the research obtained this outcome:(1)The carbonatite reservoir of Tazhong I gas field is the complex of fissure and cavern: the strike of fracture is NbE-SbW and NbW-SbE, the physical property of matrix is short of the ability of saving and flowing oil/gas, the aeolotropism is strong, the well flow potential is different from each other. This recognition contributes the research.(2)The fundamentals of acid fracturing treatment was recognized by means of carbonatite reservoir description, the polytecnica of Sectionlization of the hole in the acid fracturing treatment of horizontal well was advanced, and the production increased obviously in TZT-Z7H,TZT-Z6H,TZT-Z11H.(3)The new acid was developmented, which was thermostable, retarding, low fluid loss, and low friction.The field trial of three horizontal wells bear out the Sectionlization of the hole in acid fracturing treatment adaptive to the carbonatite reservoir of Tazhong I gas field.