7504 Meters! Sinopec's Deepest Offshore Well Is Born

This breakthrough is more than 1,000 meters higher than the original record. It is a reflection of the improvement in various aspects such as platform management capabilities and operating levels, and demonstrates the company's strong offshore oil force.

Be highly motivated before drilling, and work together to lay the foundation.

This well is an ultra-deep extended-reach well with risks and difficulties such as easy drilling, well control, easy formation collapse, and high equipment load. In order to actively respond, the company and the platform have made comprehensive preparations for drilling.

On the one hand, the platform held a special meeting through the "Offshore Integration Co-construction Party Branch", combined with the engineering design document, to analyze the equipment and spare parts status of the platform and the experience of the personnel team one by one, review the experience of early extended-reach well operations, and analyze possible problems that may exist during the operation. Make plans for difficult situations. On the other hand, the company organized experts to conduct risk analysis, sort out the well structure, geological conditions, operational risk points and countermeasures in detail, and provide strong guidance to the site. In the later stage, experienced drilling experts stationed in the "Chen Zhonghua Model Worker Innovation Studio" were sent to the site for "well setting guidance" to provide experience in drilling operations, use of fine pressure control equipment, and response to complex situations in key well sections to help complete drilling safely and efficiently.

Excellent technology helps breakthrough, Party A praises and recognized

"The 6,610-meter technical casing of a well drilled by Kanqi was successfully put in place and successfully cemented, laying a solid foundation for subsequent oil and gas layer construction..." During the operation of this well, Kanqi received a letter of commendation from Party A for its excellent technology.

The key section of this well is difficult to operate. The designed floating weight of the second-open casing exceeds the maximum load of conventional casing lifting tools. The pressure difference between the second-open casing and the third-open target layer is very high, making it easy for the drill to get stuck. To this end, the platform has improved the traditional casing running method. The second drilling adopts an unused mechanical top drive casing running tool, and the third drilling also adopts an unused precision managed pressure drilling technology. Faced with two "firsts", the well team members cooperated tacitly, the driller and assistant driller were skilled in operations, and the team leader was on duty throughout the entire process. The operating parameters were accurately adjusted according to the actual conditions such as torque and friction, and no technical problems occurred. The deck planned the set in advance. The pipe laying site ensures the continuity of operations. In the end, it took more than 30 hours to successfully lower 545 casings to the designed depth, setting a new record for Sinopec's offshore depth penetration of 9-5/8-inch casing.

Safety equipment should be taken care of by both hands, and management should be upgraded to ensure it.

Faced with this difficult well, the platform implemented upgraded management to ensure the smooth progress of the operation. Strengthen safety management. Platform managers, safety supervisors, and department heads are on-site to monitor critical operations. Strictly implement the operation permit system to ensure that each operation risk analysis is complete, protection is in place, and the process is supervised. At the same time, we continue to carry out the "Hundred Days of Safety and No Accidents" campaign, regularly select "Safety Guards" and "Safety Stars" based on data such as "STOP Cards" and "Rotating Safety Officers", and dynamically award and punish points based on the safety manual.

Strengthen inspection and maintenance of key equipment. In addition to routine equipment maintenance, key inspections of iron drillers, bridge cranes and other equipment are carried out before each drilling trip, and spare parts are replaced in advance. This well has not been shut down for repairs due to pipeline bursts or other reasons. For persistently high loads, "equipment life cycle management" should be rationally used to monitor top drives, mud pumps, etc. in real time to maintain normal operation.

In the next step, Kanqi will continue to accumulate experience in ultra-deep extended reach well operations, promote the "13381" strategy of Offshore Oil Engineering Company to lead offshore drilling to go deeper and more solid, adhere to the core concept of "every inch of footage is a commitment", and help with new achievements and achievements Accelerate the increase of oil and gas reserves and production in the East China Sea to ensure national energy security.