长宁页岩气井泡沫排水起泡剂优选及现场应用

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英文篇名：Optimization and application of foam-dewatering agents in Changning shale gas wells 作者：蒋泽银 ; 李伟 ; 罗鑫 ; 赵昊 ; 陈楠 英文作者：Jiang Zeyin;Li Wei;Luo Xin;Zhao Hao;Chen Nan;Research Institute of Natural Gas Technology,PetroChina Southwest Oil and Gasfield Company;Sichuan Province Key Laboratory of Shale Gas Evaluation and Exploitation;Sichuan Changning Gas Development Co.,Ltd.; 关键词：页岩气井 ; 泡沫排水 ; 优选 ; 长宁 英文关键词：shale gas well;;foam-dewatering;;application;;Changning 中文刊名：STQG 英文刊名：Chemical Engineering of Oil & Gas 机构：中国石油西南油气田公司天然气研究院;页岩气评价与开采四川省重点实验室;四川长宁天然气开发有限责任公司; 出版日期：2018-08-15 出版单位：石油与天然气化工 年：2018 期：v.47;No.246 基金：国家科技重大专项“大型油气田煤层气开发”下属“长宁-威远页岩气开发示范工程”(2016ZX05062-004) 语种：中文; 页：STQG201804015 页数：4 CN：04 ISSN：51-1210/TE 分类号：77-80

摘要

长宁页岩气藏采用丛式水平井进行开采,产出水为压裂残液、CaCl_2水型、矿化度29~53g/L。针对该水质特点及井型情况,优选了发泡力大于160mm、5min稳泡性大于250mm、携液量大于150mL/15min的起泡剂,研发了橇装式自动起消泡剂加注装置。在H3-1和H3-2井中成功进行了现场应用,合计增产气量0.49×10~4 m~3/d(增加26.9%),增产水量6.14m~3/d(增加1.17倍),表明泡沫排水采气技术对长宁页岩气井有很好的适应性。
        The well type of Changning shale gas reservoir is cluster horizontal well.The water producing from the well is fracturing fluid residue,the type of it is CaCl_2,the salinity of it is between29 g/L and 53 g/L.Aiming to the characteristic of water component and well type,the authors selected a foam agent which the foaming ability is greater than 160 mm,5 min foam steady ability is greater than 250 mm,foam-carrying capability is greater than 150 mL/15 min,and developed a skidmounted filling device for automatic foaming and de-foaming agent.The foaming agent and device have been successfully used in the wells of H3-1 and H3-2.The total increase of gas production is 0.49×10~4 m~3/d,which increased by 26.9%;the total increase of liquid production is 6.14 m~3/d,which increased by 117%.It is confirmed that the foam-dewatering treatment has a good adaptability of Changing shale gas well.

引文

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