第33卷第6期 2016年11月
钻井液与完井液
DRILLING FLUID&COMPLETION FLUID
doi: 10.3696/j.issn.1001-5620.2016.06.021
Vol.33 No. 6 Nov.2016
建南致密砂岩气藏压裂液伤害主控因素
付美龙"，胡泽文，黄倩，唐芳？
（1.长江大学石油工程学院，武汉434100；2.中国石化江汉油田分公司石油工程技术研究院，武汉434100）
付美龙等，建南致密砂气藏压裂欢传害主控围表[3].钻并液毒实并液，2016.33（6)：116-120.
捕要实验测定了建由致害券油气减费甲差差丙甚质胶压裂液、低象费压骤波和经丙基瓜股压裂液3种压要液酸胶后的黏度、表面张力及成流合量，发现3种压累液破胶后的性能参数存在一定的差异。通过测试不同压裂体系对岩心的总伤害率和甚质伤害率并计算出了水锁备害率，发现岩心的求锁衡害率（65%~80%）总大于基质伤害率（5%~15%），求钱将害十是降低储层净遗率的主要伤害象源；且常心美每害率和水算每害率不仅与医裂减的性能参数育一定的关系，还与常心净透率和常性存在一定的关录，通过分解实略法透中分析期定了这要因素对压波仿害的影有后得出，压累液的戏法含量是影响基质伤害的主控因求；者心净透率是影响水锁资害的主控因表。通波解水锁实验发现，严重水镇的器心通过相应的解水销措施后，岩心渗透事恢复值高达70只上，说明通过相应措意确实能减小求锁怖害。
关键词天热气：致密砂器气；压聚；压象孩：精层伤害：水锁傅害
中图分类号：TE357
文献标识码：A
文章编号：1001-5620 (2016) 06-0116-05
KeyFactorsAffecting Damageby Fracturing Fluidsto Jiannan Tight Sandstone Gas Reservoir
FU Meilong', HU Zewen', HUANG Qian', TANG Fang
(1.School of Petroleum Engineering,Yangtze University,Wuhan,Hubei 430100;
2. Research Center of Petroleum Engineering, Southwest Petroleum Engineering Co., Lid., Sinopec, Wuhan, Hubei 430035) Abstract Carboxymethyl hydroxypropyl guar gum fracturing fluid, an oligomer fracturing fluid and hydroxypropyl guar gum fracturing fluid are used in fracturing the tight sandstone gas reservoirs in Jian'nan block. In recent laboratory experiments, the viscosity, surface tension and residue of the three fracturing fluids after gel-breaking were measured. It was found that there were some differences in the properties of these three fracturing fluids afler gel breaking, The measurement of core damage has shown that the ratio of cores water block damage (65%-80%) was far greater than the ratio of cores'matrix damage (5%-15%), indicating that water block damage was the main damage to reservoir permeability, The ratio of matrix damage and the ratio of water block damage are not only related to the properties of fracturing fluid, they are also related to core pemeability and lithology. Through decomposition experiment, it was understood that the amount of residue of fracturing fluid was the key factor affecting matrix damage, and the core permeability was the key factor affecting water block damage. Experiment on water block removal has shown that cores with severe water block damagc can have permeability increases by more than 70% after removing waterblock, indicating that the measures of removing water block did work.
Key words Natural gas; Tight sandstone natural gas; Fracturing; Fracturing fluid; Reservoir damage; Water block damage
建南致密砂岩气藏属于非常规气藏，具有“全区富砂，整体含气”的特征，是重要的接替能源。建南地区须家河组致密砂岩储层物性差，孔隙度一般为2%～6%，渗透率小于1×10μum，储层埋
深浅，温度低，具有致密、非均质性强、裂缝不发育等特征，属于典型致密砂岩气藏。因此，和其它致密砂岩气一样，水力压裂是建南致密砂岩气藏勘探评价及开发建产的关键技术之一。但现场实践
基金项目：国家863计划项目“致密砂岩气藏高效钻井与压聚改造关健技术”之子课题二“致密气戴压裂改造技术研究（2013AA064802）。
第一作者简介：付美龙，1967年生，教授、博导，从事油田化学和提高采收率方面的教学及科研工作。E-mail：
805817751qq.com。万方数据