"Three Integrations" in Jiangsu Oilfield No. 1 Oil Production Plant to improve oil recovery

SINOPEC News Network News Since the beginning of this year, Jiangsu Oilfield No.
1 Oil Production Plant has closely focused on the "Water Injection Management Improvement Year" special action, and in accordance with the principle of "emphasizing benefits, finding breakthroughs, and forming a system" The yield is increased by more than 1%
.

In the first 5 months, the plant vigorously promoted integrated comprehensive treatment, in which the water quality compliance rate of Chenbao Oilfield was 92.
3%, the pass rate of intervals was 90.
1%, and the daily water injection volume increased by nearly 1,000 cubic meters year-on-year
.

Focus on the integration of water enhancement and efficiency enhancement to increase the effective injection volume

Faced with the low level of formation pressure, limited liquid extraction space, and low effective water injection in Chenbao Oilfield, the ground water injection management improvement working group of the plant took the water injection system in Block Chen 3 as a unit, and based on the principle of hydrodynamics, the 55 ports Conduct field surveys and theoretical calculations on water injection wells and 7 water injection branch lines, find out the water injection capacity of each branch pipeline, infer the pipeline fouling situation, and simulate the pump pressure of a single well to form local boost, system depressurization, and quality analysis.
Pressure integrated governance program
.

According to the three elements of reservoir, wellbore, and surface, the working group has made overall plans to promote the idea of ​​water flooding and oil displacement.
The members of the working group conducted simulations on 8 injection ports with simulated pump pressures less than the critical value, including Chen 3-29 and Chen 3-84 on the side of Fusan 1st Member in Block Chen 3.
The water wells were reformed by volume and built a two-stage pressurization system to achieve partial pressure water injection and meet the different drinking water needs of high and low permeability reservoirs
.

At the same time, the geology and technology departments jointly analyzed the adaptability of different single wells to different water quality, and screened Chen 3-95, Chen 3-57, and Chen 3-104 high permeability water injection wells.
In view of their low water quality requirements, the past The water used for backfilling is directed to them, realizing that ineffective water becomes effective water
.

　　Focus on the integration of management and governance to improve the efficiency of water injection operations

　　The plant is based on the seven modules of three standard management, pipe string technology, water quality status, process station library, equipment and instruments, original data, and development status.

　　In view of the current situation of the fast oil accumulation in the grease trap of the microbial pool of the Chenbao sewage treatment station, they took the problem as a topic, and worked with the shift station to independently reform the heating coil, innovatively use the boiler car, and clean up the aging oil; for the sedimentation tank water quality upside down, bottom Due to the sedimentation phenomenon, they completed the maintenance and cleaning task of the sedimentation tank in 15 days, and the suspended solids dropped from 30mg/L to 20mg/L, which greatly reduced the pressure on the water treatment system

　　In order to consolidate the governance effect, the ground water injection management improvement working group formulated the technical requirements for system operation as soon as possible, refined the three sections and seven subsections of the pipe network, and formed a control pattern of "front-end water control, middle-end operation, and back-end stability" , And established a dynamic monitoring platform for incoming liquids, optimized the oil content of the pre-separation device, and formulated 5 31 cleaning measures for the classified and graded water injection pipe network, and continuously consolidated the cornerstone of the long-term operation of the water injection system

　　Focus on the integration of research and application, and improve the level of water injection development

　　The plant’s technology and geotechnical personnel are strongly combined, focusing on meeting the needs of water injection in the subdivision of the reservoir, strengthening the research on technology such as integration of measurement and adjustment, multi-level intelligent injection, and complex wellbore treatment, and strive to improve the "three rates of water injection wells" ", so that under-injection wells can achieve geological injection allocation, and complex wells can resume water injection

　　Aiming at the technical bottleneck of the existing dispensing process that cannot be continuously measured and adjusted, they have successfully researched and applied cable-free online intelligent dispensing technology, which can be deployed at any time according to reservoir needs and monitored in real time, avoiding the periodicity and professionalism of conventional processes, and Due to the limitations affected by weather and well deviation, the success rate of measurement and adjustment and the qualification rate of intervals reach 100%

　　At present, the coverage ratio of "integrated measurement and adjustment + intelligent injection" in Chenbao Oilfield is as high as 90.

　　In the next step, the plant will be guided by the construction of the Chenbao Demonstration Zone, promote the efficient implementation of one block, one strategy, and continue to carry out integrated management of Libao and Sandian

　　(Zhao Haiyan)