Particularly, facing many problems worldwide, it is hard to build the industry as the world’s largest LNG project. The construction units have created a number of international and domestic records, achieving independent operation objectives and thus breaking the characteristics of China Petroleum's LNG business development. In Dubai, between the desert and the sea, extends an artificial island. This artificial island is famous for the Burj Hotel - the world’s only seven-star hotel. It resembles a beautiful sailing ship, interpreting the excellence of human thought and being the dream land of many entrepreneurs. Oil Jiangsu LNG General Manager Zhang Chengwei has a different focus. He was armed with a picture of the Burj hotel and told reporters: "A beautiful landscape, and I hope it could be like this hotel, known worldwide, attracting visitors."
From Qatar, the world’s largest LNG carrier Samra No. 261,000 m3 LNG loading berth at the wharf smoothly. This is a sign of oil and gas company of Qatar and Shell's natural gas supply long to start free trade agreement first LNG ship. Three years of preparation in the Yellow Sea, 30,000 years ago near the ancient Yangtze Estuary, an area of 1.44 square km artificial island naturally formed, as if a ship parked in the surging Yellow Sea, where the Jiangsu LNG project occupies 0.3 square kilometers. Wind and rain, time flies. Ever think of a few years ago, there was a looming small sandbar with soft sand, large tidal range, and strong trends up to 8 meters above sea level. As early as 1992, China will discuss the possibility of constructing the West the sun sand LNG project, which is the first motion for the whole of China LNG construction site. The difficulty of building Jiangsu LNG can be seen from the reasons. In the country, there have been planning and construction of LNG terminals under construction in Jiangsu LNG project off the coast, the first project, building more difficult problems in Hong Kong; station site away from the mainland, infrastructure scratch; shallow tide of poor work, marine construction difficulties; Soft rare, many technical problems of construction; mainly imported materials are limited, difficult to guarantee delivery time; project involves a wide range of complex multi-game relationship; individual experts believe that the finger-like radiation sandbank topography, fine sand projects under special geological conditions site is built and the construction of LNG terminal in Hong Kong closed.
Chinese oil natural gas pipeline will be completed, the urgent need in the Yangtze River Delta to find a stable supply of the internal security of gas supply. Election to choose to go, such as the East regarded as an alternative to one. Zhang Chengwei recalled when making the decision, saying: "The work phase of the project site, whether in the area of port and terminal building LNG artificial island, was opposed by the majority."
Project builders sought scientific answers, spending nearly three years, investing 60 million yuan, collaborating with more than a dozen international organizations, top research institutions, such as Wang Ying and Wang Rukai six academicians and other three countries, designers and hundreds of ports experts, using the most advanced research tools to carry out the trend of erosion and deposition of long-period type sandbank evolution, the trend-based physical model tests and sediment mathematical model, the construction of artificial island projects sandbar radiation experiments, the stability of the 30 or the special research.
Eventually, they reached this so far the academicians and scholars in most trials the largest and widest scope, the most advanced technical means to study the extent of the deepest ocean engineering pre-trial research to fill a number of domestic marine construction field blanks. These studies thoroughly found out and solved the field to build the Western Sun Sand Sea port of difficult problems. With these preparations, after builders daytime and night fighting over eighteen hundred, for the first time in the sandbar off the coast of radiation topography, geology pink sand sea port construction, the world recognized the restricted area, built north shore of the Yangtze River Estuary first type one hundred thousand tons of offshore deep-water port, the construction of deep-water port of Nantong People’s Millennium dream into a reality.
To get rid of foreign dependence, no social basis, extremely complex geological sea conditions, construction conditions extremely difficult, how do? Technology is a breakthrough in Jiangsu LNG options. Mainly dependent on imported building materials out of the situation. LNG storage tank capacity, storage media, special, harsh conditions, high level of security technology, low temperature required for the construction of the tank Ni9 high quality steels. Before 2008, the world’s only a handful of foreign iron and steel enterprises to master the production process and control the international market, the products are expensive, source of supply, delivery time cannot be guaranteed.
To solve this major problem, in 2007, Jiangsu, China Petroleum and Liquefied Natural Gas Co., Ltd. entrusted to lead the organization, the total package globe, Xi’an Institute of pipe and a number of units of participation, cooperation with TISCO Group conducted a three-localization of two years of research and application Ni9 steel work, has invested more than 500 million R & D funding to carry out the LNG storage tank layout map, plate groove forms, comparative analysis of relevant standards, technical conditions of purchase and preparation, welding procedure qualification, construction program study the compilation of six with case studies, the material performance test hundreds of times, and finally successfully developed low-temperature Ni9 meet the quality requirements of steel, mechanical properties, inherent quality and other key indicators have reached international level.
As a result, the cost of each block of the tank down nearly 20 million yuan, China’s LNG tank completely changed the situation of dependence on imported steel. Prior to Ni9 steel out high and do not guarantee delivery time of Belgian companies in the country after a breakthrough approach Ni9 steel 180-degree turn. Not only are prices down 30% straight, but also promised to six months delivery time by two thirds.
In engineering construction, it is worth mentioning that December 25, 2008, Jiangsu LNG terminal project pile storage tank at the end of a pile minus 60 meters below the silt and fine powder pouring sand smooth the end of the geological conditions, the tank size of pile foundation to become the world’s largest squeezed pile group. Seismic survey in Jiangsu LNG project showed that the natural soil surface below the artificial islands 1000 meters are powder soft sand, not bedrock. To address the quality of radiation sandbank special soft soil under the conditions of the tank weak bearing capacity of pile major problem, Jiangsu LNG and HQCEC closely with technical solutions for tank pile repeated comparison and selection study to determine the use of squeezed Sancha tray pile foundation pile as tanks and construction of pile foundation for such use of the world’s first meters to 60 meters, storage tanks each pile to reduce the cost base of more than 2000 million yuan, the construction cycle is significantly shortened. Detected by the tank pressure test, the maximum differential settlement are not over 9 mm, well below the design allows the 25 mm range.
In this small region within the large-scale use of this type of pile foundation and construction technology, first of its kind in the world, become a new world’s best civil engineering technology. Zhang Chengwei commented: "Rate than South Korea, Japan, low temperature cold with our domestic manufacturers to develop materials, the LNG storage tanks, pipes made low-temperature cold material, but also to fill the blank of domestic technology, lower cost per seat storage tank 700 million, and to promote domestic low-temperature cold material quickly into the international market, China has become one of the world’s second professional production of such materials to become Asia’s largest country and most technologically advanced production base all of our low-temperature stainless steel tubing, are also independent of domestic R & D, which has been very great."
More gratifying is that the project is completed, the marine environment presents more positive trend, a variety of fish in waters receiving station travel, inhabiting a variety of seabirds breeding in the receiving station. Put into use, near the sea or even rare out of the landscape, the number of hundreds of dolphins in the LNG wharf and LNG ships wander around the game waves, again and again amazed by the local fishermen. Zhang Chengwei said: "The artificial island sewage treatment facilities, construction and production to achieve full wastewater discharge standards, do not waste a drop to the ocean, otherwise known in the vicinity of the project seaweed, clams and marine fish farming with the environment will be destroyed."
Optimized to maximize the company’s construction program. Construction, they optimized the trestle piers, ship-shore interface, the water intake process, LNG storage tank pile and high water conditions, sandy open-frame vaporizer (ORV) and other major projects gasification process design, to solve a large number of technical problems. Zhang Chengwei said: "Before the completion of the pipeline bridge, Ocean Port logistics channel alone a mainland-island highway bridge across the sea. However, according to Ocean Port of the original development plan and industrial location, a large port in the port settled petrochemical, energy, metallurgy and other projects, logistics and distribution should be carried out through a submarine pipeline."
But the reality is they have had to consider, that is, between the islands of land 11 km marine intertidal zone is the local fishermen with a valuable mariculture, seaweed and clams with rich and famous, the economic high added value. If through the use of submarine construction, even if the minimum operating width of 500 meters by calculation, only the laying of submarine pipeline construction on the local marine aquaculture will bring nearly $ 400 million loss. Change the initial design, with the laying of gas pipeline bridge across the sea outside the pipeline, this is the best policy. In-depth research, based on the company to break the convention, offered to purchase road right of way with the government to build gas pipeline across the bridge from overseas, with the laying of gas pipeline bridge across the sea outside the pipeline.
This, LNG gas pipeline project and the future of oil, chemicals, pipelines can be set up in this bridge. Thus, not only to avoid completely unstable seabed geology in the marine environment through submarine pipeline under the face of a large number of technical risk, construction risk and operational risk of future production, the effective protection of the marine environment, but also greatly reduce the the project construction costs, maintenance costs and the difficulty of maintaining the pipeline, but also effectively avoid the marine environment have been devastated. It is understood that through the program than the submarine pipeline, construction of the pipeline bridge will directly reduce the investment of 200 million, to avoid the loss of 400 million yuan of marine aquaculture. Operating cost and difficulty of maintenance period is also greatly reduced.
For sediment big, too much water, they also use high sandy water conditions ORV (Open Rack Vaporizer) the safe use of technology to remove water Desander, using spray technology to ensure safe operation of ORV, so that further optimization of process water, reduce project investment of 12 million, operating period of maintenance costs will be effectively reduced. Half run that sandy little water on the wear and tear of equipment. Moreover, in the optimization of engineering solutions in their basic design stage and when HQCEC through in-depth study of the introduction of ship-shore interface pipeline hydraulic calculation technique for accurate calculation of the Federation, the ability to uninstall a prerequisite in ensuring under the LNG discharge pipe from the discharge pipe diameter 44-inch single-counted to 40-inch, pipe materials to reduce nearly 80 million; take outfall design optimization terminal, outside the station to station water intake address the erosion and deposition offshore waters of rapid change, the technical problems of water, effectively reducing the project investment and operating costs, reduce the investment of nearly 30 million yuan; in extensive research, a comprehensive and authoritative assessment of peer-reviewed based on the optimization design of LNG terminals trestle program, the first use of a simply supported, under-supported steel truss arch bridge, LNG, solve the technical and construction problems, while reducing the investment of 70 million.
Domestic water became a problem and we wanted to since it is the ancient mouth of the Yangtze, the following can not have the ancient freshwater resources through artificial island hydrogeological data for in-depth research, we decided to try to find water in the artificial island drilling results in the ground 500 m really deep to find the ancient freshwater resources, such an action would solve the construction and domestic water, if not two wells, then by ship to the island from water to land, the then 30 yuan / ton of high prices This time only two years have more than 1500 million of water in the artificial island off the coast to find underground water, which at present is also the history of marine engineering construction only this one case it!
Link Jiangsu LNG international and domestic record: lasted 10 months, an artificial island in November 2007, the success of a hydraulic fill, set a world without artificial island off the coast of Reclamation cover only 49% success rate of the record, piling and riprap on capacity creation of similar projects and marine construction projects in the history of two water first. Large LNG storage pile size and density of the world’s largest pile group squeezed (diameter 82 m range, uniform 360 diameter of 1.2 meters, 60 meters long pile Sancha Squeezed.) Large LNG unloading steel trestle construction to create the cover off the tide of poor environment without lifting a precedent for the successful application of technology (single-span steel bridge, 86.8 meters wide and 12.5 m, beam 11.6 meters high and weighs 350 tons), LNG bridge length ranked the first, second in the world (1970 m), LNG terminal loading and unloading capacity of the world’s largest. LNG overseas pipeline across the world’s longest bridge (10.762 km). 20 kV electricity supply project back to the length of the cable hit single Power Engineering, Jiangsu Province, the most (single back 14 km), top out in the country.
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