Bohai Drilling: One Drill Bearing Jidong Gas Storage Well set a number of records in the eastern part of China

On November 26, the quality inspection of casing cementing for the production casing of Nanpu 1-29 gas reservoir flat 3 wells drilled by the 70010 drilling team of PetroChina Bohai Drilling First Drilling Company was successfully completed, which met the requirements of gas storage cementing standards, and set a number of records
in one fell swoop, such as the deepest cementing well of 244.
5 mm cover layer in the eastern part of China, such as the deepest cementing well, the largest well incline, the longest horizontal displacement, and the longest tail pipe section.

The well is a large-scale injection production well deployed by Jidong Oilfield in Nanpu 1-29 gas storage reservoir, the well design depth is 4676 meters, the drilling and capping cementing of the well has created a successful precedent for large-size wellbores in gas storage in eastern China, and accumulated valuable practical experience
for large-size wellbore drilling in gas storage in eastern China.

Bohai Drilling and Jidong Oilfield Company attach great importance to the construction of the well, in view of the problems of low pressure-bearing capacity of the formation in the block, the large-size casing of the horizontal well is moderate and the replacement efficiency is not high, etc.
, experts of the group company are invited to take the pulse, comprehensively carry out special discussions, technical docking, expert consultation, and joint review, and determined that "13Cr gas-sealed casing, large-size top-seal tailpipe hanger, High-strength and toughness cement slurry system" as the main cementing technology, providing solid technical support
for on-site construction.

Bohai Diamond Jidong Petroleum Engineering Division led the establishment of the Jidong Gas Storage Project Support Team, planned ahead, coordinated drilling rig shipping, drilling tools and material preparation, construction plan compilation and review, etc.
, to ensure the smooth drilling
of Nanpu 1-29 gas warehouse Ping3 wells.
Pay close attention to drilling production dynamics, weather, navigation forecast information, strengthen production progress forecasting, timely organize production and living materials and air seal testing teams to go to the island, actively coordinate and communicate efficiently, effectively solve equipment failure emergencies, and ensure the smooth development of
drilling production.

In-depth implementation of the well chief responsibility system, together with the drilling team engineers to study the characteristics of the formation, formulate the construction plan and daily plan table, study and solve the technical problems encountered in the construction, and realize the management mode
of "solving problems without overnight, measures are formulated on site".
The integration meeting of engineering geology was held every day, combined with the characteristics of the geological structure of the block and the comparison of adjacent well data, which provided accurate data
for collapse prevention, borehole trajectory control and entering the reservoir.
During the completion and cementing period, the construction plan was carefully reviewed with the construction party, and the chief engineer and senior technical experts of the first drilling company and the first cementing company guided the decision-making on site, and carefully implemented the measures of segmented pressure bearing and well opening to ensure that the indicators met the technical requirements
of cementing in the gas storage reservoir.
(Qu Zhaogui, Wang Quanyong, Zhang Qiuliang)