China News Service, Xining, December 21 (Li Jiangning, Storm, Sun Yong, Yang Xiyan) On the 21st, the reporter learned from the Qinghai Oilfield Propaganda Department that as of December 20, 2021, Qinghai Oilfield’s 26-year cumulative natural gas production reached 100.137 billion cubic meters. rice.
57 years ago, the raging fire at Beishen Mitsui confirmed the abundant natural gas resources in the Qaidam Basin and opened the prelude to natural gas exploration in high crude oil fields.
After high-efficiency development in the three stages of "sporadic test production, rapid production, and continuous stable production", Qinghai Oilfield has a total of 9 proven gas fields, forming three major gas producing areas of Sebei, Maxian, and Lenghu, with annual natural gas production. Maintain the scale above 6 billion cubic meters.
Since 1995, the oilfield has planned and implemented the development strategy of “simultaneous development of oil and gas”, and the development of the Sebei gas field has officially started.
In view of the characteristics of unconsolidated sandstone gas reservoirs, the Sebei gas field has achieved leap-forward growth through development techniques such as fine logging interpretation, multi-factor production allocation of gas wells, and sand control of unconsolidated sandstones.
At the end of 2000, the Sege, Sexiandun and Seninglan long-distance natural gas pipelines and supporting projects were completed and put into operation.
The picture shows the gas field employees are conducting inspections.
Photo courtesy of Qinghai Oilfield Publicity Department
In recent years, Qinghai Oilfield has efficiently completed the formulation of development plans, promoted large-scale development technologies such as separate production of oil jackets, separate production of three layers, and production of horizontal wells, and the Sebei gas field has achieved large-scale production.
Natural gas production has grown at an average annual rate of 520 million cubic meters. The annual gas production has jumped from 390 million cubic meters to 5.6 billion cubic meters. The Qinghai gas region has become one of the four atmospheric regions in China.
During the period, the Nanbaxian gas field entered the stage of trial production and production, and the Xianyi, Sege and Seninglan double lines were completed and put into operation. With the Sebei gas field as the center, the gas transmission pipeline network radiating east, west, south and north was fully completed.
After 2011, the oilfield adjusted its development thinking, focusing on improving reserves production, tackling loose sandstone gas reservoir water control and sand control technology, and promoted the construction of large-scale production of the Sebei gas field and the production project of the Nanbaxian gas field. The annual natural gas output of the oilfield has risen to 6 billion. cubic meter.
In 2013, oilfield exploration discovered the Dongping Gas Field. Through the implementation of “vertical wells + horizontal wells” three-dimensional production and bedrock reservoir fracturing technology research, the production capacity construction of 1.15 billion cubic meters was completed in one year, and the average daily production per well reached 145,000 cubic meters, the annual output of oil field natural gas reached a peak of 6.89 billion cubic meters in 2014.
So far, the oilfield has basically formed a development pattern with Sebei loose sandstone gas reservoir, Baxian complex fault block gas reservoir in the south, and Dongping bedrock fractured gas reservoir as the main development.
As the main source of gas in the three provinces of Gansu, Qinghai and Tibet, the high-quality and clean natural gas energy of the oilfield has greatly improved the energy structure of Lanzhou, Xining, Golmud and other regions, and protected the ecological environment of blue sky, clean land and clean water in the three provinces of Gansu, Qinghai and Tibet. At the same time, In order to promote the economic development of local enterprises, and provide a solid energy guarantee for the warm winter of thousands of downstream households.
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