海上低渗潜山储层缝网压裂可行性评价方法  

Feasibility evaluation method for fracture network fracturing of low permeability buried hill reservoirs on the sea

作　　者：邢云龙[1] 赵鹏飞 樊爱彬 梁永星 王志猛 张亚飞 XING Yunong;ZHAO Pengfei;FAN Aibin;LIANG Yongxing;WANG Zhimeng;ZHANG Yafei(Oilfield Production Division of China Oilfield Services Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]中海油田服务股份有限公司油田生产事业部,天津300450

出　　处：《石油化工应用》2024年第4期60-66,共7页Petrochemical Industry Application

摘　　要：海上低渗潜山储层开发难度大、开发经济界限高,开发效果受压裂改造体积影响很大。采用地质工程一体化方法,在地质模型和力学模型的基础上,研究认为M潜山储层可以形成复杂人工缝网。为进一步提高裂缝复杂程度,建立了以储隔层应力差、隔层厚度、逼近角、水平应力差异系数为参数的缝网评价方法,并给出了最优值,认为储隔层应力差小于4MPa或隔层厚度小于7m时,可以实现人工裂缝穿层,实现裂缝复杂化。该研究对论证海上低渗潜山储层压裂能否形成复杂缝网,提高单井初产和累产具有很好的指导作用。The development of offshore low permeability buried hill reservoirs is difficult,the development economic limit is high,and the development effect is greatly affected by the fracturing volume.Based on the geological model and mechanical model,using the integrat-ed method of geological engineering,it is considered that the M buried hill reservoir can form a complex artificial fracture network.In order to further improve the complexity of frac-tures,a fracture network evaluation method with reservoir stress difference,interlayer thick-ness,approach angle and horizontal stress difference coefficient as parameters is established,and the optimal value is given.It is considered that when the reservoir stress difference is less than 4 MPa or the interlayer thickness is less than 7 m,the artificial fracture can be penetrated through the layer and the fracture complexity can be realized.This study has a good guiding role in demonstrating whether the fracturing of offshore low permeability buried hill reservoirs can form complex fracture patterns and improve the initial and cumulative production of a single well.

关 键 词：低渗 潜山储层 缝网压裂 储隔层应力差 水平应力差异系数 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]