Feasibility study on short radius sidetracking technology of old well in Hoja Gulluk Gas Field - A case study of H-1 well

Abstract

The Hojaguruk block is located in the central and eastern region of the Amu Darya River. The reservoir is a hard carbonate reservoir with abnormally high pressure formation, which makes well control difficult. The reservoir is covered with a thick salt paste layer, and it is difficult to drill directional well in the salt paste layer. As the central and eastern parts of the right bank of the Amu Darya River enter the late stage of development, the production capacity of old lying Wells is insufficient and the reservoir energy power is reduced. Therefore, it is urgent to transform old Wells with short radius sidetracking drilling technology and revive lying Wells to improve the production of single well and achieve the goal of stable production and increase production. Based on a comprehensive analysis of the geological characteristics, development situation and technical difficulties of short radius sidetracking in the area where well H-1 is located, this paper analyzes and demonstrates the determination of the cutting point of sidetracking technology, the optimization of the well trajectory design scheme and the analysis and demonstration of the ultra-short radius sidetracking technology, and considers all factors comprehensively to study and determine that the ultra-short radius sidetracking technology is suitable for this well condition. It can meet the requirements of reservoir development design. It is suggested to carry out the key test of the ultra-short radius sidetracking technology, and promote the application in the developed blocks in the central and eastern part of the Amu Darya Project, so as to provide research ideas and directions for tapping the potential operations in other blocks.