Xijiang 24-3 and Xijiang 30-2 oilfields were discovered in March 1985 and July 1988. Before the first exploratory well started in August, 1988 in the contract area 15/22/kloc-0, a further geological survey of 146 km was conducted in this area. 1990 confirmed the commercial feasibility of the second oilfield 30-2. Through the joint development study of 24-3 and 30-2 oilfields, the overall development plan (ODP) of these two oilfields at the end of 199 1 has been submitted to the relevant departments of China for approval. The estimated development cost in ODP is $600 million. According to the plan, 24-3 Oilfield was put into production in June 1 1994, and then 30-2 Oilfield was put into production in June 1995. The recoverable reserves of crude oil in 24-3 Oilfield are 654.38+83 million barrels, and those in 30-2 Oilfield are 254 million barrels. ODP was approved in June 1992. These two oilfields are operated by Philips Oil International Asia on behalf of its partners Pecten and China Offshore Oil Corporation (565,438+0%). The development of Xijiang Oilfield is an integral part of this project, including two oil production platforms with primary separation equipment and a floating production, storage and unloading vessel (FPSO) for the final separation, storage and unloading of crude oil. The distance between the two platforms is 13.6km, one in 24-3 Oilfield (contract area1511) and the other in 30-2 Oilfield (contract area 15/22), and FPSO is located between them. The specific location depends on the crude oil characteristics of the two oilfields. Each platform is an 8-leg steel column structure, the jacket weighs 5600 tons, and each steel column weighs 3760 tons. The living area of each platform can accommodate 100 workers. FPSO is transformed from an oil storage tank with a secondary separation device, which is used to store and distribute meters. Most of the equipment purchased by the project is purchased from the United States and Europe, and a large part of the processing work is carried out in Asia. China Resources, which has a competitive price, is also adopted, accounting for about 20% of the total investment of the project. Project Implementation A project team composed of Phillips, Pecten and China Offshore Oil Company is responsible for the implementation of this project. The team was located in Houston during the design phase and moved to the PPCIA office in Shekou, China during the production and installation phase. Halliburton Company undertakes the drilling and completion progress of two platforms of development wells, and adopts the form of integrated engineering service contract. From1February 1992 to1February 1995, Kwana John Brown was the main engineering contractor of Xijiang Oilfield, responsible for the detailed design and engineering of the top facilities, living quarters, XJ 2 drilling rig, FPSO treatment facilities and pipelines of 24-3 and 30-2 offshore platforms. At the same time, it is also responsible for the procurement, expediting, inspection, export/transportation of all processing equipment and special equipment. Kwana John Brown helped PPICA to formulate and evaluate the construction bidding package, provided overseas personnel for the project management team, and managed offshore construction in China, South Korea and China. Now the daily output of 24-3 Oilfield exceeds 70,000 barrels. After 30-2 Oilfield is put into production, the estimated maximum daily output is19.96 million barrels per day. The oil produced in the production is 25-38 oapi, the porosity of different pay zones is between 15%-28%, and the permeability is 400-3700 mDarcy. The reservoir driving mechanism is edge water driving or bottom water driving, depending on the reservoir conditions. At present, well 15 has a daily output of 27,000 barrels of crude oil. Huizhou Oilfield Group consists of Huizhou 2 1- 1, Huizhou 26- 1, Huizhou 32-2, Huizhou 32-3 and Huizhou 32-5. Among them, Huizhou 2 1- 1 oilfield was discovered in August 1985 and put into production in September 1990. Huizhou 26- 1 Oilfield was discovered in March 1988 and put into production in March 199 1 year1October. Huizhou 32-2 Oilfield was discovered in February 1990 and put into production in June 1995. Huizhou 32-3 Oilfield was discovered in June 199 1 and put into production in June 1995. Huizhou 32-5 Oilfield was discovered in September 1996 and put into production in February 1999. In June 2000, Huizhou 26- 1 North Project was successfully put into production, and the daily oil production of this oilfield will increase by 1 10,000 barrels. Liu Hua 1 1- 1 Oilfield Liu Hua 1- 1 Oilfield was discovered in February/987, and it is the largest oilfield discovered in the South China Sea at present. The oilfield is located in the Pearl River Mouth Basin of the South China Sea, 65,438+0,000 feet (300 meters) southeast of Hong Kong. Amoco obtained the contract for Block 29/04 from China Offshore Oil Corporation with the number 1985. After preliminary exploration and research, Liu Hua 1 1- 1A was drilled. The test oil output is 2240 barrels of heavy oil per day. The evaluation wells Liu Hua 1 1- 1-3 and Liu Hua 1-1-4 which were subsequently drilled proved that the oil reserves were huge, exceeding1100 million barrels. 199365438+In February, China Commercial Aircraft joined the cooperative development team, holding 24.5%, Amoco also holding 24.5%, and China Offshore Oil Corporation Oriental Company holding 5 1%. However, due to the high density of crude oil produced and relatively shallow reservoir depth, it shows that the combination of innovative technology and mature technology is necessary to enable Liu Hua Oilfield to produce. Technical BreakthroughDuring the period from 1987 to 1992, Amoco and the engineering department of Nanhai East Company tried and tested various development ideas until they found a breakthrough solution. The project team decided that the offshore production system of this oilfield should include the following main parts: a floating production system (FPS) for drilling and oil production, a floating production, storage and unloading system (FPSO) for processing and storing crude oil, and an innovative underwater system using electric semi-submersible pumps, which can serve the rapid development plan of about 20 horizontal wells around the world. Six years after the discovery of the oil field, the overall development plan of Liu Hua11was approved by governments at all levels in China, and the project entered the implementation stage. 1September, 1993, a semi-submersible drilling ship was purchased and converted into Nanhai Challenge FPS. 19935438+In June 00, another tanker of 140000 tons was purchased and converted into Nanhai Shengli FPSO. 65438+June 0995 and 65438+March 0996 entered the scheduled positions respectively. The two ships moored 3 kilometers apart. FPS is an improved semi-submersible drilling platform equipped with a horizontal well drilling system. In addition, FPS can install and operate underwater folding systems and install power generation equipment and power distribution equipment. Start drilling 10, and by the end of 1996, complete drilling 10. FPSO is a modified oil tanker, which is used to process crude oil. Store processing oil, combustion-related gases and treat production wastewater. The processing equipment on FPSO can process 65,000 barrels of oil and 300,000 barrels of fluid every day. The oil storage capacity of the ship is 720,000 barrels, and the processed crude oil will be unloaded by the transport ships berthed before and after. Establishing the modular concept of underwater system in Liu Hua project is the key factor for the success of this project. Usually, deepwater systems are very large and must be built on land and then towed to the site. But this method is not practical in Liu Hua Oilfield. Therefore, engineers designed a system that can be assembled on site and installed by floating drilling rig. By dividing the underwater system into controllable components and using some innovative technologies-including pulling the cable connecting the oil well and the field treatment-engineers created a system that can be assembled on FPS and then sank to the seabed without diving. All independent underwater components are designed to be installed and recovered from the floating production system by using underwater robots without diving into the water. A special single-point cone is placed on the seabed, and a mode is designed in which the underwater robot can freely choose tools under the water instead of changing tools back and forth on the water. Production situation: 65438+ was officially put into production on1March 1996. 1999 average daily oil production 13800 barrels, with a total of 25 production wells. Lufeng 13- 1, 22- 1 oilfield, in which Lufeng 13- 1 oilfield was discovered in 1987, 1 oilfield was put into production in1. Lufeng 22- 1 Oilfield was discovered in May 1986 and put into production in February 1997. Panyu 5- 1 Oilfield Panyu 5- 1 Oilfield was discovered in 1999. China Offshore Oil Nanhai East Company is a directly affiliated company of China Offshore Oil Corporation. Mainly engaged in the processing, storage, transportation and sales of oil and natural gas; Natural gas pipeline transportation, production, sales and utilization of petroleum and natural gas products (including refined oil, liquefied gas, petrochemical deep processing, etc.). ). Provide technical services, consulting services and supporting services related to the main business. Nanhai East Company was established in June 1983, and it is one of the four regional oil companies under China Offshore Oil Corporation. To be responsible for the exploration, development and production of oil and natural gas in the east of South China Sea 1 13 10', and authorize the full implementation of oil contracts and foreign cooperation agreements in this sea area. Since 13, eight oil fields have been completed and put into production, and the company's annual crude oil output has greatly increased. By 1996, the oil output exceeded 1000× 10 4t, ranking fourth in the national land and sea oil fields. Weizhou 10-3 oilfield is an oil and gas field in the western South China Sea. It is the earliest offshore cooperative oilfield of Nanhai West Company, and the partner is French Total Company. 1986 was put into production on August 7th, and was self-operated on May 6th 19 1 3 North Oilfield, and self-operated on August 20th191,forming an annual production capacity of 300,000 tons. Up to now, it has produced nearly10 million barrels of crude oil. Operation and production platform: Nanhai Qiangzi Weizhou 1 1-4 Oilfield Weizhou1-4 Oilfield is still one of the main oilfields in southern Weixi, which was discovered in June19821. Continuous production with Weizhou 1 1-4 East Oilfield, which was built on August 2, 1999, has formed an annual production capacity of more than 900,000 tons, and has produced nearly 6 million tons of crude oil so far. Operating production platforms: Weizhou 1 1-4a, Weizhou1-4c Weizhou 12- 1 oilfield Weizhou/kloc. With Weizhou 10-3 Oilfield, Weizhou 10-3 North Oilfield, Weizhou1/kloc-0 Oilfield, Weizhou/kloc-0 Oilfield. 1On July 28th, 1999, the celebration ceremony of the overall development project of wei county Oilfield Group was held in Weizhou Island, Beibu Gulf. The project, with a total investment of 3.2 billion yuan, took three years to complete. And supply 500,000 tons of oil to Guangxi Beihai Refinery every year. Operating production platform: Weizhou 12- 1 yacheng1kloc-0/gas field project background yacheng 13- 1 gas field is located at 100 km south of sanya city. Arco is the operator and owns 34% interest in the gas field. China Offshore Oil Corporation owns 565,438+0% of the shares, and Kuwait Petroleum Exploration Company owns 65,438+05% of the shares. When Yacheng 13 was put into production, it became the first offshore gas field in China. The development of Yacheng 13 gas field is accompanied by the growth of energy demand and the development of commodity gas market in the Asia-Pacific region. The natural gas produced by Arco gas field reaches Hong Kong Qingshan Electric Power Company after 500 miles of transportation. The development of Yacheng gas field is unprecedented in China. This is a project worth more than 654.38 billion US dollars, which requires the construction of onshore and offshore processing facilities and pipelines leading to Hainan Island and Hong Kong. Transporting natural gas to Hong Kong by pipeline requires the construction of 480 miles of submarine pipeline, which is the second longest pipeline in the world. Yacheng 13 gas field not only supplies natural gas to Hong Kong Qingshan Power Plant, but also transports natural gas to Hainan Island for power generation and as raw materials for fertilizer plants. Characteristics of Yacheng gas field Yacheng 13 gas field uses a number of advanced geological data technologies to estimate reserves and productivity. These technologies bring together many aspects of information, including geographic model, geological data, petroleum physical analysis and engineering analysis. Three-dimensional images are used to represent the geographical situation of the internal structure of gas fields. Yacheng 13- 1 gas field is trapped in a large northwest-southeast narrow fault block in the Oligocene Lingshui sandstone layer. The sandstone layer was cut off by a huge normal fault that turned up to the southwest, and the overlying strata were not integrated. The gas-water interface forms a downward sloping boundary. On Platform A, the reservoir is about 3600 meters below sea level. The data of 6 production wells, 5 exploration wells and 3D seismic lines prove that the gas reservoir covers an area of 44 square kilometers, with a maximum thickness of 2 17m and a total thickness (178m net thickness). A large number of small faults cut the reservoir, one of which is 40 meters away. The lenticular sandstone above the main reservoir still has water storage potential. Production situation: Yacheng 13- 1 proven natural gas reserves193.3 billion cubic feet, and proven natural gas condensate reserves are about10.3 million barrels. /kloc-0 was put into production in June, 1995, with an average daily natural gas production of about 1999. Wenchang 13- 1 and 13-2 oilfields entered full development in 2000, and it is planned to drill 22 production wells, including 2 horizontal wells. On September 7th, 2000, Wenchang 13-2 Oilfield1surface cluster wells drilled in Nanhai No.2 Oilfield were successfully completed, with an average of 1.87 days/well. Wenchang13-113-2 Oilfield 15000 dwt FPSO is also being built in Dalian. On June 5438+1October 65438+March 2000, CNOOC China and Canadian Haschi Oil Company signed Nanhai Wenchang13-13-2 oil contract, namely 145 oil contract. This foreign company holds 40% of the shares. Dongfang 1- 1 gas field entered full production and development in 200 1 year. On August 25th, 2000, the development project of Dongfang 1- 1 gas field was initially determined. Four platforms and a land processing terminal will be built to form an annual production capacity of 2.4 billion cubic meters of natural gas. The first phase of the project will be put into production on September 5, 2003. China Offshore Oil Nanhai West Company (CONHW) mainly undertakes 1 13 10? Oil and gas exploration and development in the western waters of Zhongnanhai, executing foreign oil contracts on behalf of national oil companies. At present, the exploration areas are mainly concentrated in the Beibu Gulf Basin, Yinggehai Basin, Qiongdongnan Basin and the western Pearl River Mouth Basin in the South China Sea. By the end of 1998, there were 3 developed oil fields and/kloc-0 gas fields. There are/kloc-0 oilfields under construction, with an annual output of 1 10,000 tons, which will be put into production in the third quarter of 1 99. At present, the company not only has the ability to independently manage offshore oil and gas exploration, development and production operations in accordance with international practices and standards, but also has professional service capabilities such as offshore facility maintenance, offshore engineering construction, seismic data processing, onshore construction and installation, communication meteorological services, and material storage and transportation.