西南石油大学学报(自然科学版)
西南石油大學學報(自然科學版)
서남석유대학학보(자연과학판)
JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SEIENCE & TECHNOLOGY EDITION)
2015年
3期
1-8
,共8页
鲜学福%殷宏%周军平%姜永东%张道川
鮮學福%慇宏%週軍平%薑永東%張道川
선학복%은굉%주군평%강영동%장도천
页岩气%水力压裂%超临界CO2%渗透率%声发射
頁巖氣%水力壓裂%超臨界CO2%滲透率%聲髮射
혈암기%수력압렬%초림계CO2%삼투솔%성발사
shale gas%hydraulic fracturing%supercritical CO2%permeability%acoustic emission
页岩气储层水力压裂过程会消耗大量的水资源,超临界CO2由于其兼具气体的流动性和液体的高密度特性,能够代替清水实施压裂,展示了非常好的应用前景。基于此,提出了超临界CO2致裂页岩增加储层渗透性的思路,并自主研制了相应的实验装置。该装置主要由CO2增压系统、三轴加载与控制系统、油浴温度控制系统、声发射监测系统等6部分组成,其轴压控制范围为0~100 MPa,围压控制范围为0~15 MPa,最高加热稳定温度为100?C ,试件尺寸为100 mm×200 mm。该装置能够对CO2相态进行精确控制,并对页岩破裂过程应力应变关系、压力、温度、声发射信号等数据进行实时采集,获取多场(地应力、温度、压力)耦合条件下超临界CO2致裂过程页岩气储层渗透率动态变化规律,为超临界CO2致裂增加页岩气储层渗透率机理的研究提供实验平台。
頁巖氣儲層水力壓裂過程會消耗大量的水資源,超臨界CO2由于其兼具氣體的流動性和液體的高密度特性,能夠代替清水實施壓裂,展示瞭非常好的應用前景。基于此,提齣瞭超臨界CO2緻裂頁巖增加儲層滲透性的思路,併自主研製瞭相應的實驗裝置。該裝置主要由CO2增壓繫統、三軸加載與控製繫統、油浴溫度控製繫統、聲髮射鑑測繫統等6部分組成,其軸壓控製範圍為0~100 MPa,圍壓控製範圍為0~15 MPa,最高加熱穩定溫度為100?C ,試件呎吋為100 mm×200 mm。該裝置能夠對CO2相態進行精確控製,併對頁巖破裂過程應力應變關繫、壓力、溫度、聲髮射信號等數據進行實時採集,穫取多場(地應力、溫度、壓力)耦閤條件下超臨界CO2緻裂過程頁巖氣儲層滲透率動態變化規律,為超臨界CO2緻裂增加頁巖氣儲層滲透率機理的研究提供實驗平檯。
혈암기저층수력압렬과정회소모대량적수자원,초림계CO2유우기겸구기체적류동성화액체적고밀도특성,능구대체청수실시압렬,전시료비상호적응용전경。기우차,제출료초림계CO2치렬혈암증가저층삼투성적사로,병자주연제료상응적실험장치。해장치주요유CO2증압계통、삼축가재여공제계통、유욕온도공제계통、성발사감측계통등6부분조성,기축압공제범위위0~100 MPa,위압공제범위위0~15 MPa,최고가열은정온도위100?C ,시건척촌위100 mm×200 mm。해장치능구대CO2상태진행정학공제,병대혈암파렬과정응력응변관계、압력、온도、성발사신호등수거진행실시채집,획취다장(지응력、온도、압력)우합조건하초림계CO2치렬과정혈암기저층삼투솔동태변화규률,위초림계CO2치렬증가혈암기저층삼투솔궤리적연구제공실험평태。
The process of hydraulic fracturing of shale gas reservoir will consume large amounts of water. Duo to the high den-sity and diffusivity of gas,supercritical CO2 can replace water as fracturing fluid,showing a very good application prospects. Based on this,we proposed increasing the permeability of shale gas reservoir with supercritical CO2 fracturing and indepen-dently developed experimental device. The device is mainly composed of the CO2 booster system,triaxial loading and control system,oil bath temperature control system,acoustic emission system,and its axial pressure control range is 0~100 MPa, confining pressure control range is 0~25 MPa,maximum heating temperature is 100 ?C ,specimen size is 100 mm×200 mm. The apparatus can precisely control CO2 phase and acquire data of shale rupture stress-strain,pressure,temperature,acoustic emission signals,and can get supercritical CO2-induced shale gas reservoir permeability dynamics of cracking shale process in multi-field(stress,temperature,pressure)coupling conditions,providing experimental platform for supercritical CO2 fractur-ing increasing shale gas reservoir permeability mechanism study.