兴安岭群油层注水井速敏伤害酸化规模的探讨  

Discussion of acidizing radius of speed sensitivity injectors of Xinganling Group

作　　者：杨宝泉[1,2] 周治刚[3] 陈冲[4] 

机构地区：[1]中国矿业大学地球科学与测绘学院,北京100083 [2]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453 [3]大庆油田有限责任公司第三采油厂,黑龙江大庆163453 [4]大庆油田有限责任公司第一采油厂,黑龙江大庆163001

出　　处：《河北工程大学学报（自然科学版）》2011年第1期100-105,共6页Journal of Hebei University of Engineering:Natural Science Edition

摘　　要：兴安岭群油层粘土矿物含量较高,胶结疏松,注水过程中存在较强的速敏伤害。本文以速敏实验为基础,结合现场生产参数,通过理论推导,计算出该油层常规注水井和压裂注水井的速敏伤害半径和解除伤害的最佳酸化半径,通过现场7口井的试验,取得了较好的效果。速敏试验表明,兴安岭群油层存在中等偏强～强的速敏伤害,常规注水井Ⅰ～Ⅳ油层组伤害半径分别为2.42m、0.94m、1.30m、0.26m,压裂注水井Ⅰ油层组存在速敏伤害,伤害半径为3.3m。酸化设计的规模应以解除地层伤害,且取得最大效益为准则。常规注水井Ⅰ～Ⅳ油层组的最佳酸化半径分别为2.4m、1.6m、1.6m和1.8m,压裂注水井Ⅰ油层组酸化半径为3.3m。兴安岭群油层7口井试验结果表明,该设计方法具有较强的实用性,可用于指导其它砂岩油层的酸化设计。Damage of speed sensitivity during water injection process exists in the Xinganling Group because of the high clay content and loose stratigraphic framework.According to the speed sensitivity experiment and the production parameters,this paper has calculated the damage radiuses and the optimal acidizing radiuses of conventional injection well and fractured injection well through theoretical derivation.This technology has been applied on 7 wells in field test.Speed sensitivity experiment shows that Xinganling Group shows m-strong to strong speed sensitivity.The damage radiuses of Ⅰ～Ⅳ layers of conventional injection well are 2.42m,0.94m,1.30m and 0.26m respectively,damage of fractured injection well is only exist in I layer and the damage radius is 3.3m.Theoretical derivation shows that the optimal acidizing radiuses of Ⅰ～Ⅳ layers of conventional injection well and I layer of fractured injection well are 2.4m,1.6m,1.6m, 1.8m and 3.3m respectively.Field test in 7 wells has confirmed that this method has strong practical applicability and can be used to the acidizing design of other sandstone oilfield.

关 键 词：兴安岭群 速敏 伤害半径 酸化 现场试验 

分 类 号：TE357.62[石油与天然气工程—油气田开发工程]