摘要
为了提高低渗透砂岩储层压裂改造效果和节省费用支出,有必要在压裂前进行措施选层。收集了近百口低渗透砂岩储层压裂措施井压前地层测试资料,采用统计分析技术,提出了针对此类储层的压裂选层方法。该方法通过总结压前地层测试资料与压裂效果优劣的相关规律性,按照压裂效果从优到劣将地层测试曲线分为七大类型,并形成指导压裂选层的标准图版,同时针对不同类型指定对应的选层标准和原则,使用时仅依据目标井压前测试资料特征,就可以对其是否具备措施潜力做出预判性决策,2019年在二连油田乌兰花凹陷储层成功应用4井层,措施选层准确率100%。应用结果表明,该方法能够实现对所有低渗透砂岩储层压裂效果的有效预测,简单实用、可靠,通用性强。
In order to improve the fracturing effect of low-permeability sandstone reservoir and save costs,the formation test data of nearly 100 fractured wells before fracturing in low-permeability sandstone reservoir are collected,and the fracturing layer selection method for low-permeability sandstone reservoir is proposed by using statistical analysis technology.By summarizing the correlation between pre-fracturing formation test data and fracturing effect,the formation test curve is divided into seven types according to the fracturing effect from good to bad,and a standard chart is formed to guide fracturing layer selection.For different types,the corresponding selection criteria and principles are specified.In addition,according to the characteristics of the pre-fracturing test data of the target well,the predictive decision is made on whether it has the potential of fracturing.In 2019,this method was successfully applied for 4 wells/layers in Wulanhua sag of Erlian Oilfield,and the accuracy rate of layer selection was 100%.This method has a good guidance for effective prediction of fracturing effect of all low-permeability sandstone reservoirs.
作者
王鑫鑫
霍丽丽
张辉
李琳琳
胡涛
徐凤兰
WANG Xinxin;HUO Lili;ZHANG Hui;LI Linlin;HU Tao;XU Fenglan(Exploration Department,PetroChina Jilin Oilfield Company,Songyuan,Jilin 138001,China;Research Institute of Exploration and Development,PetroChina Jidong Oilfield Company,Tangshan,Hebei 063000,China;Exploration Department,PetroChina Huabei Oilfield Company,Renqiu,Hebei 062552,China;Well Testing Branch,CNPC Bohai Drilling and Engineering Co.,Ltd.,Langfang,Hebei 065007,China)
出处
《油气井测试》
2020年第5期54-60,共7页
Well Testing
基金
中国石油天然气股份有限公司重大科技专项课题“华北油田持续有效稳产钻完井关键技术研究与应用”(2017E-1511)。
关键词
低渗透砂岩储层
压裂改造
选层
地层测试
双对数曲线
径向流
Low-permeability sandstone reservoir
fracturing
layer selection
formation test data
double logarithmic curve
radial flow
fracturing effect
