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PetroChina Southwest Oil and Gas Field recently announced that as of June 30, China’s largest carbonate monolithic gas field, PetroChina Anyue Gas Field, has produced 7.
4 billion cubic meters of natural gas this year, a year-on-year increase of about 5%.
The cumulative production has been since the start of production.
Gas 72.
6 billion cubic meters
.
The Anyue Gas Field is located in the Suining and Ziyang cities of Sichuan and Tongnan District of Chongqing, with proven reserves exceeding one trillion cubic meters
.
Gas field reservoirs have low porosity and are prone to water invasion, and high-efficiency development faces huge challenges
According to reports, the Southwest Oil and Gas Field has innovated the fine gas reservoir description technology for fracture-cavity carbonate gas reservoirs, and used the "multiple compound geological model + scattered wave numerical simulation" high-yield target identification technology to accurately construct high-yield geological models.
More than 1,000 square kilometers of favorable development zones have achieved 100% success rate of development wells, and the proportion of high-yield gas wells with a million cubic meters accounted for 79%, rewriting the traditional perception that “low-porosity gas reservoirs are difficult to produce high”
For the Anyue gas field, especially the Longwangmiao Formation gas reservoir, the number one problem of "water invasion" must be solved
.
In response to this, the Southwest Oil and Gas Field has established low-amplitude and high-pressure water-filled carbonate gas reservoirs with integrated water control technology for low-porosity and strong water-intrusion carbonate gas reservoirs with high requirements for optimal development and difficulty in stabilizing gas reservoirs.
The full life cycle progressive water control development model is "water control intrusion, mid-term flooding prevention and control, and late water seal prevention and control"
In addition, the Southwest Oil and Gas Field has also innovated a series of key technologies for real-time intelligent active water control for the development of strong water intrusion gas reservoirs, creating a domestic record for efficient numerical calculation of an 80 million grid model, which is far more refined than the second 20 million grid model in the country.
It is reported that the annual gas production of Anyue Gas Field in 2020 will account for about 7% of the domestic annual gas production
.
Since the development of the gas field, the GDP of Sichuan and Chongqing has increased by 640 billion yuan.
The natural gas produced can replace 87 million tons of standard coal, reduce 35 million tons of carbon dioxide and 1.
7 million tons of sulfur dioxide
