杭锦旗锦58井区盒1储层混合水压裂研究与实践

杭锦旗锦58井区属致密低孔气藏,需压裂才能建立有效产能。该井区盒1储层岩石脆性指数高,储层砂体跨度大,层内发育多套气层,气层之间发育有薄泥岩隔夹层;对比国外非常规油气藏开发经验,分析了锦58井区盒1储层混合水压裂的适应性,认为杭锦旗锦58井区具备开展混合水压裂试验的地质条件。结合锦58井区盒1储层特点,优化了混合水压裂施工工艺参数,对压裂液进行了优选,现场试验增产效果较好。

Mixed water fracturing technology of He 1 reservoir in Jin 58 well block of Hangjinqi and its practice

Jin 58 well block of Hangjinqi belonged to a tight gas reservoir with low porosity and fracturing was needed for effective production.He 1 reservoir in the well block was of high rock brittleness and large sand bodies span.Multiple gas layers were developed and there was thin shale interlayer between gas layers.Compared with the development experiences of unconventional oil and gas reservoirs abroad,the adaptability of the mixed water fracturing of He 1 reservoir was analyzed.The results indicated Hangjinqi 58 well block is suitable for the mixed fracturing.In combination with the reservoir property,the parameters and liquid system of the mixed water fracturing construction were optimized,which achieved a good production increase effect in field testing.