透镜状浅层底水气藏开发技术--以胜利油田为例

在分析透镜状浅层气藏地质特点的基础上 ,论述了气藏的动态特征及出水对气藏开发效果的影响 ,并提出了确定气井合理产量应考虑的主要因素 .利用动态盈亏平衡原理测算了气藏开发的厚度界限 ,克服了以前静态方法的局限性 .研究表明 ,只要采取合理的开发方式 ,认识到底水在气藏开发过程中的作用 ,确定合理采气速度 ,透镜状浅层底水气藏也能够获得良好的经济效益 .该类气藏应立足于占领高部位 ,出水前平衡、稳定开采 ,使气水界面均匀推进 ;出水后及时采取相应措施 ,避免井底积液过多 ,才能够获得较高的采收率 .研究成果对国内外同类型气藏的开发具有一定的借鉴意义 .

Development technologies of shallow lenticular gas reservoirs with bottom water--taking Shengli Oilfield as an example

Based on the analysis of the geological Characteristics of the shallow lenticular gas reservoirs, their performance characteristics and the effect of water production on their development results are discussed. And the major factors which should be considered in determining rational individual well gas producing rate are put forward. Economic thickness limit of gas reservoirs is calculated using dynamic break even principle for the first time, and this computation method overcomes the limitation of static methods. The research results indicate that good economic benefit can be achieved in the development of the shallow lenticular gas reservoirs as long as reasonable production modes and gas producing rate are taken based on understanding of the functions of bottom water during production. The development of this type of gas reservoirs should be based on drilling structural high, and before watering, balance and stable production makes gas water interface advance uniformly. After watering, appropriate measures should be taken promptly to prevent to much liquid accumulating in bottom hole. The research results can be used as reference to the development of similar gas reservoirs.