The overall speed increase of drilling can enable oil and gas resources to enter the market as soon as possible and reduce costs. In the operations of “three high†and “three low†oil and gas fields, Chuanqing drilling relied on technology and management innovation to continuously improve drilling speed and achieve stable economic development.
As of December 10, the Chuanqing 50053 drilling team broke through 60,000 meters this year, breaking the Sulige gas field single-team annual record of 55,000 meters, refreshing 11 drilling technical indicators; 30107 drilling team has completed 26 wells this year. The drilling footage is 58,800 meters, the average construction period is 8.56 days, and the monthly drilling speed is 10,100 meters per month.
In the oil and gas exploration process, continuous speed increase can save the construction period, so that oil and gas resources can enter the market as soon as possible, and the investment can speed up the investment recovery and reduce the overall cost. Speed-up has also become the unremitting pursuit of engineering and technical service companies at home and abroad.
As an integrated service provider of oil and gas engineering technology, Chuanqing Drilling relies on technology-driven, management innovation and information technology innovation in many “three high†and “three low†oil and gas fields operations to continuously improve construction speed and achieve stable development of enterprises. .
Schematic diagram of drilling cycle and mechanical drilling speed in some sections of Chuanqing drilling section Liu Jiajie / Drawing
Core technology is the driving force for speed
"In order to continue to speed up, we must give full play to the leading role of technology." Liu Jianjun, senior engineer of Chuanqing Drilling Company, said.
The high-altitude block of the southwest oil and gas field has an annual output of more than 10 billion cubic meters of natural gas, accounting for 6% of the total domestic natural gas production. As an engineering and technical service provider, Chuanqing Drilling relies on the advancement of key core technologies such as fine pressure control drilling and engineering geology integrated drilling technology. Under the condition of an average well depth of more than 5,000 meters, a drilling round was realized in just a few years. Faster than a round, the average drilling cycle is reduced by 50%.
Drilling in the high-grinding block is extremely difficult, and it is more difficult to continue to speed up. The length of the well section, the number of layers, the gas in the layers, the large pressure coefficient span, and the frequent leakage of wells, the proportion of leaks in conventional drilling reaches 59.3%, often leaking and spraying, the processing time is long, the aging is low, and the well control risk is high. .
The fine pressure-controlled drilling technology independently developed by Chuanqing Drilling has become the “maximum hero†of the deep well speed increase in the Gaogao block. In the past 4 years, the fine pressure-controlled drilling technology has applied 40 wells in the high-grinding block. The Permian system uses fine pressure-controlled drilling technology. By releasing the formation capacity + appropriately increasing the bearing capacity of the formation, the average single-well leakage is reduced by 86%. The average processing complexity time was reduced by 95.3%. The Sinian system adopts fine pressure control technology and adopts “micro-leakage†operation mode. The average single-well leakage loss is reduced by 81%, the processing complexity time is reduced by 92.4%, the footage is 1.98 times of adjacent wells, and the drilling time is 43.77% of adjacent wells.
Statistics show that the lost circulation has become one of the bottlenecks restricting the speed of shale gas drilling. The shale gas-oil drilling fluid and high-performance water-based drilling fluid technology independently developed by Chuanqing Drilling completely replace the import, and the longest horizontal section is 2810 meters, which solves the problem of stability of the wellbore in the long horizontal section and guarantees the Sichuan-Yunnan Shale gas horizontal wells are safely and quickly drilled.
Characteristic management is the guarantee of speed increase
“Management speed is the key.†Li Xuegang, general manager of Chuanqing Drilling Changqing Drilling Corporation, said bluntly. In 2017, Changqing Oilfield and Chuanqing Drilling carried out innovative pilot projects in the two blocks of Wubao and Nanliang, set up a joint project team, teamed up with external associations, made on-site decision-making, shared risks, and implemented geological, drilling, oil testing, and production. Integrated management, the overall operating efficiency is increased by 20%, and the task is completed 40 days in advance.
Speeding up by management is the experience summed up by Moxi speeding up. But what kind of management means is most suitable for engineering and technical service enterprises, and the test is the innovation ability of enterprises.
In the high-fire block block 022 well area, a central camp area has been put into use, serving four nearby drilling teams. The integrated construction mode of “a central camping area + N wellsites†not only reduces the comprehensive cost of drilling, but also promotes the team building exchange learning and lean drilling matching improvement on the basis of assembling the deep joint operations of multiple drilling teams. Single well project management integration optimization, safety and environmental protection common governance.
On December 5th, Chuanqing Xinjiang Branch analyzed the speed-up effect of the test well in the Tazhong area. In the third round of test wells, the average cycle time was 35.47 days. Compared with the second round of test wells, the average well depth was 11 meters, the cycle was shortened by 1.81 days, and the mechanical drilling rate increased by 11%. Good results have been achieved in terms of mechanical drilling speed, drilling cycle, completion cycle, etc. The speed is faster than one round, and the index is better than one round.
Informatization is the support of speeding up
On December 8th, Dr. Yao Jianlin, deputy director of the Drilling and R&D Center of Chuanqing Drilling and Drilling Institute, was designing a new drill bit with preferred parameters. An hour ago, the drill bit factory received instructions from the drilling team, which is currently drilling three wells and needs a new drill bit.
I saw Yao Jianlin tapping the mouse, and the 3D printer next to it began to print the plastic master bit. The bit master took the rubber mold, and a custom drill was born 48 hours later.
“It turns out that a drill bit can take 30 days from collecting information to finally reaching the well site. At present, our response time is only 3 days. Under normal circumstances, 3 to 5 days, a drill bit can be used for on-site production.†Chuan Qing Fu Xiaoping, director of the Drilling Center of the Core Drilling Center. The engineering technology integrated information system has brought about earth-shaking changes in the design and manufacture of drill bits.
The engineering technology integration information system is an integrated information platform system with independent intellectual property rights. It can comprehensive data collection and management, professional data analysis application and production dynamic tracking for the full professional chain of the wellbore. It has massive data processing capability and is praised by China Petroleum. "The latest practice of 'Internet +' in the field of oil and gas drilling and completion engineering technology, a new weapon for intelligent drilling and completion."
In recent years, the construction of Sichuan Qing drilling informatization has made rapid progress. In 2013, since the cloud service platform was put into use, it has provided more than 200 virtual servers and more than 1200 cloud desktops, saving more than 20 million yuan in investment and improving the efficiency by more than 30 times. The integrated collection platform (A12) is used as the source of engineering data collection to achieve cross-professional data reporting, sharing and query at the well site. The data is reported to have a 70% reduction rate. Chuanqing Company has completed the drilling, logging and logging engineering data of more than 5,000 wells to the integrated database. At present, these data can be well applied in some areas.
ã€Expert Reviews】
Drilling speed is a systematic project
In the past ten years, Chuanqing Drilling Company has been fighting in the core area of ​​China's oil and gas production and production, and has played a major role in the exploration and development of oil and gas fields and shale gas in Sichuan, Yunnan, Changqing and Tarim, and gradually explored a unique feature of Chuanqing. The drilling speeds up the road.
Drilling speed increase is a systematic project, which is reflected in all aspects and various links in the construction operation process. While grasping the main contradictions, we cannot ignore all kinds of secondary contradictions. The purpose of speeding up the drilling project is to achieve the overall speed increase. Firstly, through the breakthrough of the point, the team in the same block can achieve the speed-up goal as a whole. Instead of a few drilling teams reaching the speed-up target, simply create several new indicators. ,new record. Secondly, the team working in the same block can't be very good, and the difference is very poor, so it can't achieve the purpose of speeding up and improving efficiency. Therefore, only the vast majority of teams have achieved the speed-up target to achieve the overall drilling speed.
Specifically, Chuanqing drilling began with the implementation of speed-up measures and the continuous advancement of technology integration and innovation.
On the basis of benchmarking advanced technical indicators, combined with factors such as their own technical level, equipment management, production organization, etc., the speed-up work targets at different stages are proposed. The implementation plan and work requirements must be targeted and operative, including detailed technical solutions, equipment optimization configuration, organizational safeguards, etc., especially the development of standardized drilling speed-up templates for different blocks is effective. method. For example, in the high-grinding block, Chuanqing drilling explored the formation of speed-up templates, and according to the application of the template, three speed-up templates were upgraded, achieving a good speed-up effect.
In response to the key technical aspects of speeding up and speed-up, Chuanqing drilled and summarized the advanced experience, refined the speed-up plan to the speed-up template, and refined the single-well technical measures for specific wells, and continuously improved the drilling speed-up template. Through the application of standardized drilling speed-up template, and continuous improvement and improvement in operation, it can effectively promote the progress of drilling engineering speed-up work.
Give full play to the leading role of technology and vigorously promote the speeding work. First of all, based on the integrated application of mature process technology, we can make full use of existing resources, integrate various advantages, reduce application risks and reduce cost investment. Secondly, it is the innovative application of new technologies and new processes. It is necessary to carry out pilot tests with purpose and purpose, strengthen technical research, and solve the problem of speed increase. Through the application and innovation of technology, the drilling speed is improved while ensuring safety and quality.
In recent years, with the increase of the depth and difficulty of exploration and development, the complexity of the project has become an important factor hindering the speed increase, which has seriously eroded the speed of drilling. Do a good job in the complex prevention and treatment of accidents, effectively reduce the occurrence of complex accidents, effectively improve drilling speed, reduce waste, and enhance their market competitiveness. At the same time, it can also help Party A speed up the exploration and development process and achieve a win-win situation.
China Petroleum will gradually increase its oil and gas exploration and development efforts, and drilling must achieve sustained speed increase. We must correctly understand the speed of drilling engineering, the idea should be unified, the concept should be changed, and the speed increase is to improve efficiency. We must enhance the urgency of drilling speed, quickly adapt to market needs, and make new contributions to China's oil security national energy security. (æ™å‡Œ: Director of Engineering Technology Division of Chuanqing Drilling Company, Gu Xuetao finishing)
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