测试压裂分析方法在致密砂岩气藏的应用研究  

Application of Mini-frac Analysis Method in Tight Sandstone Gas Reservoir

作　　者：江锚 杨琦[2] 马伟云 谢昕 王黎 杨帆 JIANG Mao;YANG Qi;MA Weiyun;XIE Xin;WANG Li;YANG Fan(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;China United Coal Bed Methane Co.,Ltd.,Beijing 100011,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]中联煤层气有限责任公司,北京100011

出　　处：《化工管理》2023年第31期69-73,共5页Chemical Engineering Management

基　　金：中海油有限公司科研项目—临兴神府致密气增产改造关键技术研究与应用(YXKY-ZL-01-2021)。

摘　　要：测试压裂在致密砂岩气田开发及储层改造优化方面起到非常关键的作用。水力压裂是提高致密砂岩气田动用储量的最有效手段之一。以停泵之后裂缝延伸及滤失因素的综合G函数模型、F函数模型为基础,分析与压力相关的滤失的G函数及其叠加导数的变化特征。以A区块两口气井测试压裂阶段压降曲线分析为例,介绍了利用G函数特征曲线、F函数特征曲线分析求取闭合参数、地层参数及对储层特征进行诊断的方法。通过对裂缝闭合后压降曲线分析可以为后续井压裂设计、施工提供可靠的依据。Mini-frac plays a key role in tight sandstone gas f ield development and reservoir reconstruction optimization.Hydraulic fracturing is one of the most effective means to increase the reserves of tight sandstone gas f ields.Based on the comprehensive G function model and F function model considering fracture extension and f iltration factors after pump shutdown,the change characteristics of pressure related f iltration G function and its superimposed derivative were analyzed.Taking the pressure drop curve analysis of two gas Wells in the mini-frac stage of block A as an example,this paper introduces the method of using the analysis of G function characteristic curve and F function characteristic curve to obtain the closure parameters,formation parameters and the diagnosis of reservoir characteristics.The analysis of pressure drop curve after fracture closure can provide a reliable basis for subsequent well fracturing design and construction.

关 键 词：测试压裂 G函数 F函数 压降分析 闭合压力 

分 类 号：TE357[石油与天然气工程—油气田开发工程]