创新驱动助推磨溪区块龙王庙组大型含硫气藏高效开发

四川盆地安岳气田磨溪区块下寒武统龙王庙组气藏是我国迄今探明的最大规模单体整装碳酸盐岩气藏。该气藏具有储 量规模大、单井产能高等一系列优势，同时也存在着诸多影响高效开发的复杂情况，如中含硫化氢、缝洞储层低孔隙度及强非均质性、 气水赋存形式多样、超压与应力敏感关系密切等。目前，世界上已开发的寒武系大型碳酸盐岩气藏极少，对其特殊开发规律的认识 也存在着一些盲区；而大型含硫气藏开发建设投资较大，开发前期评价阶段试采严重受限，快速建产难度大，潜在风险高。针对上 述难点，结合国家强化清洁能源供给保障的战略需求，中国石油西南油气田公司对该气藏开展了大规模的高产井培育、优化开发设计、 快速优质建产和HSE 保障升级的攻关研究和现场试验。通过技术与管理模式的创新，仅用3 年时间就高质量、高效率、高效益地将 其建成为年产能力超过100×10⁸ m³ 的现代化大型气田，生产规模和开发指标均达到预期效果，成为中国大型气藏高效开发的新典范， 其成功模式可为国内不同类型气藏开发所借鉴。

Innovation-driven efficient development of the Longwangmiao Fm large-scale sulfur gas reservoir in Moxi block,Sichuan Basin

The Lower Cambrian Longwangmiao Fm gas reservoir in Moxi block of the Anyue Gasfield, Sichuan Basin, is the largest single-sandbody integrated carbonate gas reservoir proved so far in China. Notwithstanding this reservoir’s advantages like large-scale reserves and high single-well productivity, there are multiple complicated factors restricting its efficient development, such as a median content of hydrogen sulfide, low porosity and strong heterogeneity of fracture-cave formation, various modes of gas-water occurrences, and close relation between overpressure and stress sensitivity. Up till now, since only a few Cambrian large-scale carbonate gas reservoirs have ever been developed in the world, there still exists some blind spots especially about its exploration and production rules. Besides, as for large-scale sulfur gas reservoirs, the exploration and construction is costly, and production test in the early evaluation stage is severely limited, all of which will bring about great challenges in productivity construction and high potential risks. In this regard, combining with Chinese strategic demand of strengthening clean energy supply security, the PetroChina Southwest Oil & Gasfield Company has carried out researches and field tests for the purpose of providing high-production wells, optimizing development design, rapidly constructing high-quality productivity and upgrading HSE security in the Longwangmiao Fm gas reservoir in Moxi block. Through the innovations of technology and management mode within 3 years, this gas reservoir has been built into a modern large-scale gas field with high quality, high efficiency and high benefit, and its annual capacity is now up to over 100 ×10⁸ m³, with a desirable production capacity and development indexes gained as originally anticipated. It has become a new model of large-scale gas reservoirs with efficient development, providing a reference for other types of gas reservoirs in China.