致密砂岩储层水力加砂支撑裂缝导流能力

发布时间：2018-01-10 21:21

本文关键词：致密砂岩储层水力加砂支撑裂缝导流能力　出处：《大庆石油地质与开发》2017年06期 　论文类型：期刊论文

【摘要】：裂缝的导流能力对于水力加砂压裂效果影响很大,分析裂缝导流能力影响因素、研究如何增加裂缝导流能力,对于提高压裂增产效果具有重要意义。针对长庆油田安83区块致密砂岩储层的特点,使用Meyer软件对裂缝的各项参数进行模拟预测,考察了支撑剂类型、粒径、铺砂浓度、嵌入以及压裂液残渣对砂岩储层裂缝导流能力的影响,并进行了增产效果预测。结果表明:陶粒的导流能力远大于石英砂和树脂砂;低闭合压力下,粒径越大,导流能力越高,随着闭合压力的增大,大粒径支撑剂导流能力下降幅度较大;不同粒径组合支撑剂的导流能力下降幅度相比较于单一粒径支撑剂要平缓得多;铺砂浓度越高,裂缝导流能力越高;当闭合压力为70 MPa时,支撑剂的嵌入可使导流能力下降30.1%;压裂液残渣可使不同粒径支撑剂的裂缝导流能力出现不同程度的下降;增产倍数与裂缝导流能力成正比,当陶粒筛选目数10/20、20/40和40/60组合且比例为1∶3∶1时,增产倍数最大。在低渗透储层压裂现场应用,增产效果较好。
[Abstract]:Fracture conductivity has great impact on the hydraulic fracturing effect, factor analysis of fracture conductivity, to study how to increase the fracture conductivity, has important significance to improve the stimulation effect. According to the characteristics of Changqing Oilfield 83 block sandstone reservoir, which were simulated and predicted the parameters of fracture were investigated using Meyer software. Proppant type, particle size, sand concentration, influence of embedding and fracturing fluid residue of sandstone reservoir fracture conductivity, and the yield prediction. The results show that the conductivity of ceramsite is larger than the quartz sand and resin sand; closed low pressure, larger particle size, flow capacity is higher, with the increase the closure pressure, large diameter proppant conductivity decreased greatly; the conductivity of different particle size of proppant decreased compared with single diameter proppant to flatter shop; The sand concentration is higher, the fracture conductivity is higher; when the closure pressure is 70 MPa, the embedment of proppant can make the flow capacity decreased by 30.1%; fracturing fluid residue can make different size proppant fracture conductivity decreased to different extent; yield ratio and fracture conductivity is proportional to the number of 10/20,20/40 ceramic when screening the combination of 40/60 and and the ratio of 1: 3: 1, the largest production increase. In the low permeability reservoir fracturing field application, yield effect is good.

【作者单位】：长江大学;中海油能源发展股份有限公司工程技术分公司钻采工程研究所;
【基金】：中石油科技创新基金项目“致密油体积压裂缝网与基质耦合流动机理研究”(2015D-5006-0208)
【分类号】：TE357.1
【正文快照】： 致密油的开发是目前全球石油行业勘探开发中的一个重要组成部分,由于其储层致密、渗透率较低,大多采用压裂增产工艺开采[1-3]。目前,通常采用的压裂工艺有重复压裂、通道压裂、体积压裂等,这些压裂措施的核心都是通过不同工艺技术对储层进行改造,即在储层中制造人工裂缝,改变

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