低渗气田的合理开发方案研究

M气田为典型的低渗干气气藏,由于面积大、储量高,投产井数少且时间短,故各沉积单元的储量动用程度很低。为了使单井能够控制足够的储量且具有一定的供气能力和经济效益,文中通过经济极限井网密度法来确定该气田的经济极限井距;综合分析了M气田的地质特征及开采动态,采用均匀井网形式进行衰竭式开采。依据M气田地质特征及井网井距论证成果,共设计了8套对比方案,通过对各方案的数模预测,对比分析经济评价结果,推荐方案3（1000m井距的正方形井网）为最优方案。

Research on reasonable development program in low permeability gas field

Gas Field M is a typical dry gas reservoir with low permeability. Because of great area, large reserves, but a few brought in wells aml short time, reserves producing degree of various depositional units is very low. In order to make the single well control the sufficient reserves and possess definite gas supply capacity and economic benefits, we use the economic limit well pattern density method to confirm the economic limit well spacing of the gas field. Through comprehensive analysis of geological features and production performances in Gas Field M, we decide to adopt the uniform well pattern to conduct the depleted exploitation. Based on the geological features analysis and well pattern demonstration of the gas fieht, we design eight programs. According to the comparison of numerieal simulation and economic evaluation results, economic evaluation result is analyzed. Program Ⅲ （square well pattern with 1,000 m well spacing ） is optimal program.