川西坳陷高庙子地区沙溪庙组气藏动态特征研究

川西坳陷高庙子地区沙溪庙组是典型的低渗致密砂岩气藏，该研究区地质条件复杂，储量难动用，采速低，稳产差，面临提高综合开采效益困难等问题。本文主要是对研究区气藏动态特征进行综合研究，为研究区气藏高效开发提供建设性意见。本文首先建立了生产井类型划分标准将生产井类型划分为四大类，即高效井、中高效井、中效井及低效井。结合研究区生产井采气曲线、产量递减曲线等，分井组、区块对研究区气藏动态特征进行了分析，探讨研究区气藏产量递减、含水等现象，解释不同现象的主控因素，并结合地质特征和地层能量分析等，对研究区气藏开发的动态特征进行全面综合分析。基于上述分析，对研究区气藏可采储量进行了预测，对其生产潜力进行了评价，并针对生产开发过程中存在的问题，提出相应的解决对策，为研究区下一步地高效开发提供方向及思路。

Study on Dynamic Characteristics of Gas Reservoir in Shaximiao Formation of Gaomiaozi Area, Western Sichuan Depression

The Shaximiao Formation in the Gaomiaozi area of the western Sichuan depression is the typical low permeability and tight sandstone gas reservoir, the geological conditions of the study area are complex, reserves are difficult to use, mining speed is very low, stable production is poor, Faced with problems such as improving the comprehensive mining efficiency is very difficult and so on. This paper mainly studies the dynamic characteristics of gas reservoirs in the study area, and provides constructive suggestions for the efficient development of gas reservoirs in the study area. In this paper, the classification of production wells is established, and the production wells are divided into four categories, namely, high efficiency wells, medium-high efficiency wells, medium wells and inefficient wells, and then analyzed the characteristics of different types of production wells. Then, combined with the study area production wells gas production curve, yield decline curve ,the dynamic characteristics of gas reservoirs in the study area are analyzed by dividing wells and blocks to explore the study area gas reservoir production decline, water and other phenomena, and analyze the main factors of different phenomena. Combined with geological features and stratigraphic energy analysis and so on, the comprehensive analysis of the dynamic characteristics of gas reservoir development in the study area is carried out. Based on the above analysis, the recoverable reserves of gas reservoirs in the study area are predicted and its production potential is evaluated. For the problems of the production in the development process, putting forward the corresponding solutions, which provides directions and thoughts for the next step to efficient development of the research area