The World's Leading! Fuling Shale Gas Field Drilling And Coring Technology

Five wells on the Jiaoye 66 East Platform in the Fuling shale gas field have completed post-pressure drilling and coring work. The cumulative coring section length of the five wells is 1,000.51 meters, setting a new world record for the longest total coring footage on a single platform.

Fuling shale gas field

It is reported that the continuous coring footage of Well Jiaoye 66-Jin 5 in the gas field reached 240.2 meters in the horizontal section, the core length of the horizontal section was 239.82 meters, and the maximum single long-tube coring footage in the horizontal section was 53.7 meters, setting a new record for the total coring footage of a single platform. Five drilling world records, including the longest continuous coring footage in the horizontal section of a long and single well, the longest core length in the horizontal section, the longest long-tube coring footage in a single horizontal section, and the highest average coring yield rate in the horizontal section, mark Fuling. The drilling and coring technology in post-fracturing fracture areas of shale gas fields has reached the world's leading level.

Jiaoye 66 East platform is located in Nanmu Village, Jiaoshi Town. Among them, wells Jiaoye 66-1, 2, 3, and 4 are directional coring wells in the fracture area after shale gas pressure, while Jiaoye 66- Well Q5 is the first well in China to coring the horizontal section of the fracture zone after shale gas pressure. The purpose is to use a variety of coring methods to clarify the three-dimensional spatial fracture distribution characteristics of the Jiaoshiba three-dimensional development zone of the Fuling shale gas field, and to evaluate the fracture distribution in small wells. The potential for further dense well deployment under distance conditions.

It is understood that in order to promote the difficult coring work, the gas field has carried out program demonstration, tool improvement and measure formulation in advance. A technical team for post-pressure drilling and coring of shale gas wells has been established to provide tracking and guidance throughout the well process, including preparation of coring tools and drilling fluids. Overall management of performance control, complex trajectory control, coring parameter optimization, etc. In addition, the technical team also carried out research on coring problems, using "three-cylinder and six-cylinder connection" coring technology to explore the ultimate capabilities of long-cylinder coring tools and improve the stability and efficiency of coring operations.

"In view of the problems such as the difficulty of setting the coring tool assembly and the misalignment of the inner barrel of the coring tool, our technicians optimized the coring drill assembly and improved the centering of the coring inner barrel, ultimately ensuring the smooth progress of the coring operation." Related to the gas field The person in charge said that the above-mentioned technology has achieved world leadership and is of great significance to promoting the efficient development of domestic shale gas.