薄互层大型压裂组合加砂技术研究与应用  

Research and Application of Massive Combined Sand Fracturing for Thin Interbedded Reservoirs

作　　者：金智荣[1] 张华丽[1] 周继东[1] 王进涛[1] 

机构地区：[1]中国石化江苏油田分公司石油工程技术研究院,江苏扬州225009

出　　处：《石油钻探技术》2013年第6期86-89,共4页Petroleum Drilling Techniques

摘　　要：为实现薄互层大型压裂造支撑长缝和缝高有效支撑,提高压裂效果,研究应用了组合加砂技术。在分析裂缝宽度和流体密度对支撑剂运移趋势影响的基础上,得出了组合加砂的顺序为支撑剂粒径由小到大、密度由高到低。借助导流能力试验对比不同支撑剂比例组合,提出了组合加砂时增加大粒径、低密度支撑剂的比例来提高裂缝导流能力。该技术在长停井L3井进行了试验,先加入30/50目、密度1.75kg/L的陶粒20m3,再加入20/40目、密度1.60kg/L的陶粒30m3。压裂后净压力拟合分析表明,支撑缝长196.8m,支撑缝高42.5m,基本达到设计预期要求。该井压裂后初期平均产液量5.6t/d,产油量3.2t/d。现场施工表明,该技术能够实现造支撑长缝和缝高有效支撑,为类似薄互层大型压裂提供了技术参考。In order to create long fractures and propped fracture height effectively, and improve the effect of fracturing, a combined sand fracturing technique was developed. Based on the analysis of the effect of fracture width and fluid density on proppant migration trend, we determined sand adding order from small size to large size and from high density to low density. Comparing different proppant ratio combina- tions in conductivity test,it was found that increase in sand size and proportion of low density proppant can raise fracture conductivity. This technique has been applied in Well L3, in which 20 cubic meters of 30/50 mesh 1.75 kg/L ceramsites was added first,followed by 30 cubic meters of 20/40 mesh 1.60 kg/L ceram- sites. Net pressure matching and analysis after fracturing treatment show that hydraulic fracture length reaches 196.8 m and fracture height reaches 42.5 m meeting the design requirements. Well L3 produced 5.6 t/d of fluid and 3.2 t/d of oil after fracturing initially. The field operation shows that this technique can create long propped fractures and fracture height effectively, providing technical reference for fracturing in similar thin interbedded reservoirs.

关 键 词：薄互层 大型压裂 组合加砂 支撑裂缝 裂缝剖面 

分 类 号：TE357.13[石油与天然气工程—油气田开发工程]