| Jingbian gas field is a typical large carbonate gas field with the characteristics of low porosity,low permeability and low abundance.Y well area is the main production block of Jingbian gas field,which reflects the overall situation of Jingbian gas field to a certain extent.Due to serious reservoir heterogeneity and long mining time,the current distribution of remaining reserves in Y well area is unclear,and the development potential needs to be clarified.It is urgent to carry out research on the distribution of remaining reserves,predict development potential and formulate targeted development technology policies.Firstly,this paper analyzes the basic geological characteristics and development dynamic characteristics of gas reservoirs in Y well area,calculates the dynamic reserves in Y well area,and estimates the geological reserves in combination with the reservoir physical property data.On the basis of understanding the basic characteristics of the gas reservoir,the reserves are verified by establishing a three-dimensional geological model,and then the distribution of the remaining reserves in the Y well area is clarified by means of numerical simulation.On the basis of clarifying the distribution of the remaining reserves of each sublayer,the development potential status of each layer is evaluated and the influencing factors are analyzed.Based on the above research,two technical measures for potential tapping,such as reperforating operation and well pattern infill,were proposed,and three sets of potential tapping technical schemes were compiled.The effects of the schemes were predicted and compared through numerical simulation methods,and scheme 3 was selected as the best potential tapping technical scheme.The above research results and understanding can provide a reference for the subsequent efficient development of the Jingbian gas field.The research results also provide reference for the research on potential tapping technology countermeasures in similar carbonate gas fields. |
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