浅层煤储层多脉冲高能气体压裂技术试验及应用研究

Test and Application of High Energy Gas Fracturing Technology of Multi- pulse Shallow Coal Reservoir

针对我国煤层气储层特征及开发现状,基于高能气体压裂机理及研究基础,开展了适用于沁水盆地煤层气开发的高能气体压裂技术试验研究。该区煤层气储层资源量较为丰富,煤储层(埋藏深度<1000m)为浅层煤储层,具有低孔隙度、低渗透率等特点,目前主要以水力压裂改造煤气层储层达到投产增产目的。针对此区煤层气水力压裂开发效果不明显,二次压裂增产效果不理想等问题,设计了煤层气储层多脉冲压裂技术的试验应用研究与探索。重点论述了浅层煤层气多脉冲压裂技术设计方法,装药结构设计,作用机理与工艺设计,及全封闭井口多脉冲压裂设计等,总结分析了三口井现场试验应用的试验效果及存在的不足。该工艺技术应用试验的成功为我国浅层煤层气压裂开发提供了新的增产技术与途径。

Aimed at Chinese CBM reservoir characteristics and the development of current situation and based on the mechanism of high energy gas fracturing and research Foundations, an experimental study is conducted on the high--energy gas fracturing technology which is suitable for the development of Qinshui Basin CBM. Coalbed gas reservoir resources in the area is rich,the coal reservoir （burial depth less than 1000m） for shallow coal reservoir with low porosity,low permeability,etc. ,at present mainly in the hydraulic fracturing gas reservoir reached the production yield. In view of the development of coalbed methane in hydraulic fracturing effect is not obvious, the problem of two fracturing stimulation effect is not ideal, the design of application of test and the exploration of coalbed gas reservoir fracturing technology of multi pulse. Focuses on the shallow coal seam gas fracturing technology design method of multi pulse, charge structure design, mechanism and process design, and full closed wellhead multi-- pulse fracturing design, summarizes and analyzes the deficiency of the test experiment of the effect of application of well site in three and the existing. The technology of application test of success for our country can provide production technology and new way of shallow coal--bed methane fracturing development.