摘要
世界能源的总趋势是向低碳化方向发展,目前,我国正倡导“低碳经济”、“低碳生活”,天然气作为清洁、安全的民用燃气,开发利用天然气成为当今世界能源发展的潮流。红岗浅层天然气是吉林地区主要的民用燃料,勘探至今已有40多年的历史。近年来,随着一系列浅层高产井的陆续完钻,红岗浅层气藏开发展示出了良好的前景,成为吉林油田天然气开发的重点地区。但是随着勘探的深入,一些问题制约了浅层气藏的勘探与开发。为了保证气藏有效平稳的开发,本次研究系统分析了气藏地质特征、开发特征以及二者之间的内在联系,找出影响开发效果的因素,有针对性的提出开发技术对策。
本论文针对浅层气藏的特点,应用动静态相结合的方法,对研究区明水、黑帝庙气藏进行了地质特征研究,落实各小层微构造特征、沉积特征、储层物性特征、气藏温度压力系统和气藏类型,并分析气藏分布规律。研究认为明水气藏MI3气层构造形态是近南北走向的低幅背斜,为曲流河相沉积,砂体以粉砂岩为主,成岩作用差,物性好,气层分布以构造为主控因素,属岩性-构造气藏。黑帝庙气藏为一个完整的长轴低幅背斜构造,气层为水下三角洲前缘沉积,砂体主要为粉砂岩和泥质粉砂岩,成岩作用对储层物性的改造较弱,属高孔、中高渗储集层,气层分布以岩性为主控因素,属构造-岩性气藏。明水气藏埋深浅,平均只有250m,地层压力低,产量低。同时,黑帝庙气藏砂体分布较零散,连通性较差,储量动用不均衡等诸多问题,给气藏开发带来一定困难。针对目前存在的问题,在地质特征分析的基础上,对开发动态特征、气井产能及气藏潜力进行分析,并最终提出切实可行的开发技术对策。
The general trend of the world’s energy is lowing carbon. At present,our country is advocating“low carbon economy”and“low-carbon life”. Natural gas as the clean and safe household fuel, development and utilization of natural gas is the trend of world energy development. Honggang shallow natural gas is the main civilian fuels in Jilin province. This field exploration has been 40 years. In recent years, with a series of shallow high-yield wells drilled in succession, Honggang shallow gas reservoir development shows good prospects to become the focus of Jilin oil field. However, with further exploration, some of the problems constrain the shallow gas reservoir exploration and development. To develop gas reservoirs smooth and effective, there have systematic analysed systematic analysis, development features and their internal relationships in order to find the inappropriate working system existing in production process at present, and proposes advisable technologic countermeasures to the development problems present.
In view of characters of shallow gas pool, the paper studies gas reservoir geological characteristics in Mingshui and Heidimiao gas pool of Honggang gas field.There includes the implementation of the small layer of micro-structural characteristics, sedimentation characteristics, reservoir properties characteristics, temperature and pressure system, gas reservoir type and the distribution of gas reservoirs Mingshui gas reservoir MI3 is nearly NS oriented anticline in structural shape, meandering river facies, siltstone sand, poor diagenesis and good physical property. The distribution of gas layers is controlled dominantly by lithology. The reservoirs belong to structure-lithology reservoirs. Heidimiao gas reservoir is a complete axis anticline, the submerged delta front deposits, mainly sandstone siltstone and muddy siltstone, and weak diagenesis. It belongs to a high porosity and permeability reservoir. The distribution of gas layers is controlled dominantly by structure. The reservoirs belong to lithology-structure reservoirs. Mingshui gas pool is shallow depth, an average of only 250m, low formation pressure, low output and high rate of natural decline. Meanwhile, the problems of Heidimiao gas reservoir are sand distribution in a piecemeal manner, poor connectivity, producing reserves nonequilibrium and so on. These bring many difficults in gas development. For the current problems, on the basis of anysis of geologic feature, the paper analyses development dynamic, well productivity and gas reservoirs of potential, and proposes reasonable development technical countermeasures at last.
引文
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