OPTIMIZATION OF PRESSURIZED MUDCAP DRILLING TECHNOLOGY USING AERATED DRILLING FLUIDS FOR FORMATION EXPOSING IN LOW PRESSURE GAS RESERVOIR

Abstract

The relevance of the research is caused by decreasing negative influence on low pressure gas reservoirs by applying modernized Pressurized Mudcap Drilling Technology through usage of oil-based aerated fluids. The main aim: to study domestic and international experience in the application of Pressurized Mudcap Drilling Technology; to analyze research methods and creation of foams for the construction of wells; to optimize technology for use in the construction of wells for gas facilities with abnormally low reservoir pressure by replacing liquid drilling fluid in the borehole annulus with aerated fluid; to investigate the possibility of creating stable aerated solutions on a hydrocarbon basis; to analyze the effects of various surfactants on the process of creating anhydrous foams on a different basis; to determine the most effective combinations of amphiphilic chemical reagents and bases for the development of aerated oil-based aerated solutions. Objects: Pressurized Mudcap Drilling Technology and surfactants and stabilizer for oil-based foams; surfactants of various natures for the creation of aerated fluids on an anhydrous basis. Methods: research experiences of Pressurized Mudcap Drilling Technology applying, modernization Pressurized Mudcap Drilling Technology, analyzing scientific and industrial literature to identify the most effective surfactants and stabilizer for oil-based foams on an anhydrous basis. Results. It was established that in world practice there are examples of successful application of Pressurized Mudcap Drilling Technology for the construction of wells in conditions of abnormally low reservoir pressures. The most effective laboratory tests for the creation of foams were determined. A method for improving Pressurized Mudcap Drilling Technology for drilling for gas objects with low pressure is proposed. The necessity of developing and using anhydrous-based foams to minimize the impact on the filtration characteristics of gas collectors was established. The analysis of the stabilizing ability of various surfactants to create aerated fluids on oil-basis is carried out.

Keywords

• abnormal low reservoir pressure
• gas production
• surfactants
• anhydrous foam solutions
• pressurized mudcap drilling technology