基于滑动窗口的水力压裂井底压力实时计算研究  

Sliding-Window Model for Real-Time Bottomhole Pressure in Hydraulic Fracturing

作　　者：孟磊峰 张帅[1] 王军平 何建 徐亚军 盛茂[1,3] Meng Leifeng;Zhang Shuai;Wang Junping;He Jian;Xu Yajun;Sheng Mao(State Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum(Beijing);CNPC Xibu Drilling Engineering Company Limited;Research Center for Intellingent Drilling&Completion Technology and Equipment,China University of Petroleum(Beijing))

机构地区：[1]油气资源与工程全国重点实验室,中国石油大学(北京),新疆乌鲁木齐市830000 [2]中国石油西部钻探工程有限公司 [3]智能钻完井技术与装备研究中心,中国石油大学(北京)

出　　处：《石油机械》2025年第4期96-100,共5页China Petroleum Machinery

基　　金：中国石油天然气集团公司-中国石油大学(北京)战略合作项目“物探、测井、钻完井人工智能理论与应用场景关键技术研究”(ZLZX2020-03);中国石油大学(北京)科研基金项目“水力压裂人工智能闭环调控原理与方法研究”(ZX20200112)。

摘　　要：现有水力压裂井底压力模型计算方法难以适应当前普遍采用的大规模体积压裂中频繁变换排量、压裂液类型、支撑剂质量浓度等操作。为此引入滑动窗口算法,建立了压裂井底压力实时计算模型,以压裂秒点数据为基础,精细表征了压裂液类型、密度、支撑剂质量浓度等关键参数沿井筒轴线分布并每秒更新,实现了分段分流态计算静液柱压力和流动摩阻。研究结果表明:采用滑动窗口分段计算方法,可有效保证计算的实时性和准确性,经井底压力监测数据验证,模型平均计算相对误差为2.1%。研究结果可为压裂工况实时判识和裂缝扩展动态评价提供准确的井底压力数据。Existing models for determining the bottomhole pressure in hydraulic fracturing cannot adapt to the commonly popular large-scale volume fracturing process where pump rate,fracturing fluid type,and proppant concentration vary frequently.This paper introduces the sliding window algorithm to establish a real-time bottomhole pressure calculation model for hydraulic fracturing operations.This model,based on per-second fracturing data,precisely characterizes and updates on a per-second basis the distribution of key parameters(e.g.fracturing fluid type/density,and proppant concentration)along the wellbore axis,and calculates the hydrostatic column pressure and flow friction by segments and flow patterns.The results indicate that the segment-based model using sliding window can effectively yield real-time and accurate calculation,with an average relative error of 2.1%as validated using monitored bottomhole pressure data.The research results provide accurate bottomhole pressure data for real-time identification of hydraulic fracturing events and dynamic evaluation of fracture propagation.

关 键 词：水力压裂 井底压力 滑动窗口 实时计算模型 流动摩阻 秒点数据 

分 类 号：TE357[石油与天然气工程—油气田开发工程]