复杂缝网导流能力实验研究

发布时间：2018-01-04 12:33

本文关键词：复杂缝网导流能力实验研究　出处：《油气地质与采收率》2016年05期 　论文类型：期刊论文

【摘要】：缝网导流能力是影响致密油气藏储层改造效果的重要因素之一。设计新型导流室,通过室内导流能力实验研究闭合压力、铺砂浓度、砂堤高度、支撑剂及缝网结构等因素对缝网导流能力的影响,并利用正交试验分析各参数对缝网导流能力的影响程度。结果表明:随着闭合压力的增大,缝网导流能力先缓慢降低后大幅降低,最终下降趋势平缓;随着铺砂浓度和砂堤高度的增大,缝网导流能力增大;缝网导流能力随着支撑剂粒径的增大而增大,大粒径支撑剂承压能力差,随着闭合压力的增加,缝网导流能力下降较快;随着次生裂缝数量的增多,与出口端距离减小,缝网导流能力增大。各参数对缝网导流能力的影响程度分别为:闭合压力影响最显著,次生裂缝位置和支撑剂粒径影响较大,铺砂浓度和次生裂缝数量有一定影响,砂堤高度与支撑剂类型影响最弱。
[Abstract]:Fracture network flow capacity is one of the important factors influencing dense reservoir reconstruction effect. Through the design of a new type of diversion chamber, closed indoor experiment of diversion capacity pressure, sand concentration, sand embankment height, and the influence of the proppant fracture network structure and other factors on the impact of network flow capacity, and the analysis of the parameters on the net the conductivity of the orthogonal test. The results show that: with the increase of closure pressure, fracture network flow capacity decreases slowly at first after the greatly reduced, finally decreased with increasing slightly; sand concentration and sand embankment height, joint increased net flow capacity; fracture network flow capacity increases with the increase of the particle diameter supporting agent, large the particle size of proppant bearing capacity difference, with the increase of closure pressure, fracture network flow capacity decreases rapidly with the increase of the number of secondary cracks; and the outlet end, the distance decreases and the fracture network parameters on the flow capacity is increased. The influence degree of net diversion capacity is: the influence of closed pressure is the most significant, the secondary crack location and proppant particle size have great influence, and the sand concentration and the number of secondary cracks have certain influence. The sand dike height and proppant type have the least influence.

【作者单位】：中国石油大学(华东)石油工程学院;
【基金】：山东省自然科学基金“页岩气藏水平井滑溜水压裂支撑剂输送机理研究”(ZR2012EEM001)
【分类号】：TE357
【正文快照】： 随着油气资源的不断开发,对致密砂岩油气和页岩油气等非常规油气藏的开采越来越受重视,因其储层物性差、非均质性强,开发难度极大[1-3]。体积压裂技术可以在储层中形成人工裂缝与天然裂缝相互交错的裂缝网络,增大储层改造体积,从而有效提高采收率[4-9],近年来在非常规油气藏的

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