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青海气区是我国陆上的大气区之一,现已累计探明天然气地质储量3046.57×108m3,可采储量1619.31×108m3。该区的主力气田——涩北气田为第四系生物成因气田,具有特殊的地质条件,主要表现在气藏埋藏浅、储层岩性疏松、含气井段长、气层层数多、气水分布复杂、气田开发难度大。通过实施科技创新战略,积极探索和试验新工艺、新技术,气田开发水平得到了提高。为此,系统总结了2001年以来青海气区天然气开发技术的进展:低阻气层识别技术水平不断提高,天然气增储效果显著;疏松砂岩取心技术的突破,完成了大批岩心分析试验项目,推动了储层评价、气水关系等深入研究;开发层系及射孔单元的划分、井网部署、多层合采射孔层位优化、多层合采气井合理配产等方面的研究进展,使气藏工程研究及方案设计水平得到了提高。
Qinghai-Gazetteer is one of the land-based atmospheric regions in China. It has now accumulated 3046.57 × 108 m3 of proven natural gas reserves and 1619.31 × 108 m3 of recoverable reserves. The main gas field in the area, the Sebei gas field, is a Quaternary biogenic gas field with special geological conditions. The gas fields are mainly characterized by shallow burial gas reservoirs, loose reservoir lithology, long gas bearing intervals, multiple gas layers and gas Complex water distribution, gas field development difficult. Through the implementation of scientific and technological innovation strategy, and actively explore and test new technology, new technologies, gas field development has been improved. Therefore, the progress of natural gas exploitation technology in Qinghai-Gazette since 2001 is systematically summarized: the technology of low-gas-bearing gas identification technology is continuously improved and natural gas storage effect is remarkable; the breakthrough of loose sandstone coring technology has completed a large number of core analysis and test projects, Advances in reservoir evaluation, gas-water relationship and other studies have been further studied. The research progresses on the development of strata and perforation units, deployment of well patterns, optimization of multi-level perforation intervals and reasonable allocation of multi-layer gas wells , So that the level of gas reservoir engineering research and program design has been improved.