Research On Petroleum Geology And Development Character Of Shallow Gas Pool In Honggang Gas Field

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.