Shengli Oilfield Chunliang Oil Production Plant: Use "one plus one minus" to promote "one liter and two drops"
In the first four months of this year, the total energy consumption and carbon emissions per ton of oil and gas decreased by 16.6% and 17% respectively when the crude oil production of the Shengli Oilfield Chunliang Oil Production Plant increased by 20,600 tons year-on-year. Production has increased, but energy consumption and carbon emissions have decreased. This highlights the distinctive characteristics of Chunliang Oil Production Plant's insistence on inefficient reservoir management, strengthening the control of injection-production-transportation process and the construction and utilization of new energy, and promoting green and low-carbon production in an integrated manner.
The working area of Chunliang Oil Production Plant spans five counties and districts of Binzhou, Zibo and Dongying, with an area of 2,200 square kilometers, a total length of more than 1,300 kilometers of single-well oil pipelines and oil pipelines, 2,424 power equipment and 628 thermal equipment. "The large area, the difficulty of reservoir exploitation, the long pipelines, and the large number of equipment have become obstacles in the process of reducing energy consumption and carbon emissions." Sun Jiankui, safety director of the oil production plant, sighed.
In Sun Jiankui's view, there are two ways to reduce energy consumption and carbon emission reduction, one is to do a good job in the addition of new energy utilization, and the other is to do a good job in the subtraction of energy consumption such as thermal power, natural gas, and thermal energy, and use "one plus one subtraction" to promote "one rise and two drops".
Promote the "multi-energy complementary" utilization model
Chunliang Oil Production Plant has promoted the comprehensive utilization mode of "multi-energy complementary" new energy such as photovoltaic, solar thermal and geothermal, and has built 7.5 megawatts of photovoltaics, with an annual power generation capacity of 9.58 million kilowatt hours and a carbon emission reduction of 8,306 tons. At the same time, the plant adopts the combination mode of "solar thermal + air heat source pump" and "solar thermal + valley power heat storage" to replace 11 single-well gas furnaces, which is expected to save 330,000 cubic meters of gas annually and reduce carbon emissions by 710 tons.
The plant also cooperates with the new energy development center to apply the resources of geothermal wells for winter heating in residential areas, and heats plate heat exchangers to replace some gas-water jacket furnaces, with an average daily gas saving of 1,670 cubic meters since March this year.
"Dual control" optimization and iterative improvement
In line with the principle of "reservoir-wellbore-surface-station depot" integrated management and consumption reduction, Chunliang Plant has explored 17 treatment projects such as ineffective reservoir control and reduction, electric heating treatment, and new energy construction, and integrated to form a dual-control "one warehouse and four reservoirs" project operation, and continued to promote the optimization and iterative improvement of "dual control".
In the production energy consumption, electricity is the largest, accounting for 66.3% of the total energy consumption and 87.6% of the total carbon emissions. In this regard, relying on the energy and carbon emission control center platform, Chunliang Plant monitors the whole process of energy consumption of the whole plant, sorts out 17 key monitoring indicators such as pressure drive electricity, investigates the power consumption per ton of produced liquid, inefficient wells with electricity consumption per ton of oil and abnormal power consumption equipment, and reduces consumption and efficiency through measures such as reservoir injection and production adjustment, wellbore process optimization, and surface equipment treatment.
In the process of reservoir development, the ineffective recovered fluid circulation is also energy-intensive. The plant has implemented liquid production structure adjustment for 6 blocks such as Liang 61, and controlled and reduced inefficient and ineffective water injection at the source. After the adjustment of the block flow line in Fan 41 Sha No. 3 Middle School of Gaoqing Oilfield, the annual water injection was reduced by 7,500 cubic meters, the electricity was saved by 56,000 kWh, and the average daily oil increase in the block was 12 tons.
In addition, the potential of the ground water injection system to reduce energy consumption has been further explored. After the Liangsi water injection station was changed from fresh water injection to produced water injection, the annual power saving was 1.1 million kilowatt hours. In the Chundong Ground System Integrated Energy Efficiency Improvement Project, 45 energy-saving motors have been replaced, which is expected to save 396,000 kWh of electricity annually; One main line and three branch lines were renewed, saving about 180 kilowatt hours of electricity per day.
Since last year, the plant has carried out a total of 493 high-consumption and low-efficiency optimization treatments, saving a total of 3.16 million kilowatt-hours of electricity and reducing the power consumption per ton of liquid by 0.2 kilowatt-hours. At the same time, they also strengthened the treatment of high-consumption electric pumps, among which, after the implementation of the transfer and pumping treatment of the pure 56 square 7 electric pump wells, a total of 112,900 kilowatt-hours of electricity was saved.
In addition to electricity consumption, natural gas consumes more, accounting for 30.5% of total energy consumption and 11.4% of carbon emissions. In this regard, on the one hand, in the process of heavy oil exploitation, the plant reduced the amount of steam injection by 15,000 tons year-on-year and reduced the consumption of natural gas by 500,000 cubic meters by means of whole-process drying, layered steam injection, differentiated sand control, and adjustment of steam absorption profile. On the other hand, the Chunliang Oil Production Plant fully implements the integrated economic pipeline transportation work, optimizes the gas pipeline network process, and strictly controls the gas volume for self-consumption.
Since last year, the cumulative liquid volume of the combined station of the gathering and transportation system has increased by 250,000 cubic meters year-on-year, the gas consumption has decreased by 650,000 cubic meters year-on-year, and the comprehensive energy consumption per ton of liquid treatment has decreased by 0.57 kg per ton of standard coal year-on-year.
