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Large deep coalbed methane field discovered in Shaanxi, China!
▲ Drilling operations are underway at Yanchang Petroleum's Yandong coalbed methane field.
On July 13, Yanchang Group announced that the proved reserves of the Yandong coalbed methane (CBM) field, submitted by the company, passed the review and filing of the Ministry of Natural Resources, with geological reserves of approximately 53.7 billion cubic meters. Shaanxi Province has gained another large deep CBM field.
The Yandong CBM field, located in Yanchang County and Yichuan County, is the first large deep CBM field proved by a provincial-level enterprise in Shaanxi. Its burial depth exceeds 2,000 meters, and it is a typical "self-sourced and self-stored" deep CBM reservoir. According to expert assessments, the proved reserves of the Yandong CBM field provide a foundation for building an annual production capacity of 800 million to 1 billion cubic meters of CBM.
A CBM field is essentially a "natural gas field" hidden in coal seams, with methane as its main component, commonly known as "gas". After extraction and utilization, CBM can become a clean fuel, not only ensuring coal mine safety but also serving as an energy source.
Due to its deep burial and complex geological conditions, extraction of deep CBM is extremely difficult. The research team of Yanchang Petroleum innovatively proposed a new accumulation theory and optimized drilling and production plans accordingly. In 2024, its deployed Well Chang 91 X1 (a directional well) performed excellently in single layer gas testing, with a maximum daily gas production exceeding 106,000 cubic meters, setting a new national record for the highest daily production from a vertical/directional well in deep CBM.
After more than three years of research, the Yanchang Petroleum team clarified the rules of deep CBM enrichment and accumulation in the southeastern Ordos Basin, developed an integrated drilling fracturing production process system applicable to various well types, and achieved historic breakthroughs in single well production.
陕西是煤炭资源储量和生产大省，煤层气资源主要分布在矿区。2023年，中国海油在陕西榆林发现大型煤层气田——神府深煤层大气田，探明地质储量超1100亿立方米，是中国首个发现的千亿方深煤层气田。今年3月，陕西印发关于进一步加快煤层气（煤矿瓦斯）抽采利用的实施意见，明确将加大财政支持、强化开发利用管理、完善价格上网政策、加快科技创新，推动全省煤层气开发利用，为国家能源安全提供更大保障。
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