大庆火山岩测试压裂参数解释新理论模型的建立与应用  

Establishment and application of new theoretical model for interpretation of minifrac parameter in volcanic layer

作　　者：唐鹏飞[1] 王海涛[1] 刘宇[1] 

机构地区：[1]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《内蒙古石油化工》2014年第7期108-111,共4页Inner Mongolia Petrochemical Industry

基　　金：中国石油天然气股份有限公司油气勘探重点工程技术攻关项目"火山岩;碳酸盐岩等特殊储层试油(含储层改造)配套技术研究"资助

摘　　要：大庆徐家围子气田火山岩气藏天然裂缝发育及局部构造变化大,导致压裂中出现高滤失、高停泵压力梯度以及近井高摩阻等疑难问题,为了进一步提高疑难储层施工成功率,在以往火山岩测试压裂方法研究基础(传统"G函数"模型,二维)之上,建立了更适合大庆火山岩储层压裂参数解释的新理论模型——广义"G函数"模型(三维),并对所建立的模型进行了数值模拟分析和现场应用,与传统"G函数"模型(二维)对比发现,新理论模型对火山岩储层压裂参数解释更为合理和准确,成功率也有明显提高(应用11口井加砂符合率由72.4%提高到87.1%),从而解决了火山岩疑难储层改造成功率低的问题,对火山岩疑难储层压裂技术具有重要意义。High leak-off,high ISIP(instantaneous shutin pressure)and high friction near wellbore resulted from natural fracture development and rapid structural changes of volcanic layers in the Daqing Xujiaweizi Gas Field.In order to improve the success rate of fracturing of tough reservoirs in this field,the generalized ' G Function' theoretical model(3D),based on the previous minifrac method(2D),was built for the interpretation of fracturing parameters in favor of Daqing volcanic beds in this field.We have used it in numerical simulation and field application.Compared with traditional theoretical model(2D),new theoretical model has the advantage in interpretation that has much more fitness and higher accuracy.New model offers theoretical model for improving fracturing success rate(11wells were selected for field experiment,the rate of sand fracturing increased from 72.4%to 87.1%).Thus effectively resolving the problem of low fracturing success rate in such tough volcanic beds.The new model introduces a theoretical principle for improving the fracturing success rate and is of great significance to the application of hydraulic fracturing especially in difficult-fracturing layer.

关 键 词：徐家围子气田 火山岩 测试压裂 疑难储层 广义“G函数” 

分 类 号：P618.130.2+1[天文地球—矿床学] TE319+.1[天文地球—地质学]