低渗透气藏水平井分段压裂分段优化方法研究

杨浩; 李新发; 陈鑫; 陈晓毅; 刘鹏; 冯青; 耿少阳

doi:10.3969/j.issn.1006-6535.2021.01.018

特种油气藏 >

2021 , Vol. 28 >Issue 1: 125 - 129

DOI: https://doi.org/10.3969/j.issn.1006-6535.2021.01.018

油藏工程

低渗透气藏水平井分段压裂分段优化方法研究

杨浩 ,
李新发 ,
陈鑫 ,
陈晓毅 ,
刘鹏 ,
冯青 ,
耿少阳

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1.中海油田服务股份有限公司,天津 300450;
2.中国石油玉门油田分公司,甘肃酒泉 735000;
3.成都理工大学,四川成都 610000

杨浩(1984—),男,工程师,2007年毕业于大庆石油学院油气田开发工程专业,2010年毕业于东北石油大学油气田开发工程专业,获硕士学位,现从事低渗透储层改造方案研究工作。

收稿日期: 2020-02-19

修回日期: 2020-11-12

网络出版日期: 2021-04-27

基金资助

国家自然科学基金“页岩储层纳米孔隙结构表征及渗流机理研究”(51674044)

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Study on Staged Optimization Method of Staged Fracturing for Horizontal Wells in Low-permeability Gas Reservoir

Yang Hao ,
Li Xinfa ,
Chen Xin ,
Chen Xiaoyi ,
Liu Peng ,
Feng Qing ,
Geng Shaoyang

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1. China Oilfield Services Limited, Tianjin 300450, China;
2. PetroChina Yumen Oilfield Company, Jiuquan, Gansu 735000, China;
3. Chengdu University of Technology, Chengdu, Sichuan 610000, China

Received date: 2020-02-19

Revised date: 2020-11-12

Online published: 2021-04-27

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摘要

水平井分段压裂已成为低渗透气藏高效开发的重要方式,针对储层非均质性强及天然裂缝分布复杂导致压裂效果差的问题,采用四维影像裂缝监测技术,建立了基于测录井曲线的应力薄弱识别方法,并引入应力薄弱发育评价参数K_tr,结合水平井段储层发育特征对分段参数进行优化,从而充分改造应力薄弱段。研究结果表明:在高于K_tr截取值的井段,四维影像监测出起裂的裂缝条数多于设计值,同时压裂后产能高于平均水平。因此,能够应用K_tr值结合水平井段储层发育特征优化水平井分段压裂间距,对改进低渗透气藏压裂段划分方法,提高改造效率与采收率具有重要作用。

关键词： 低渗透气藏; 水平井; 分段压裂; 钻时; 天然裂缝; 优化方法

本文引用格式

杨浩 , 李新发 , 陈鑫 , 陈晓毅 , 刘鹏 , 冯青 , 耿少阳 . 低渗透气藏水平井分段压裂分段优化方法研究[J]. 特种油气藏, 2021 , 28(1) : 125 -129 . DOI: 10.3969/j.issn.1006-6535.2021.01.018

Abstract

The staged fracturing in horizontal wells has become an important method for efficient development of low-permeability gas reservoirs. In view of the poor fracturing effect caused by high reservoir heterogeneity and complex distribution of natural fractures, the four-dimensional imaging technology for monitoring fractures was used to establish a weak stress identification method based on logging curve, the weak-stress development evaluation parameter K_tr was introduced and combined with the reservoir development characteristics of horizontal well to optimize the staged parameters, so as to fully stimulate the section with weak stress. The study results show that in the well section higher than the cutoff value of K_tr, the number of fractures detected by four-dimensional imaging was more than the design value, and the productivity after fracturing was higher than the average level. Therefore, the K_tr value can be used to optimize the staged fracturing interval of horizontal wells in combination with the reservoir development characteristics of the well section and to improve the effect of fracturing and stimulation. It plays an important role in improving the fracturing section division method of low-permeability gas reservoirs and improving the efficiency of stimulation and recovery.

Key words： low-permeability gas reservoir; horizontal well; staged fracturing; drilling time; natural fracture; optimization method

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