CAJ | 학술논문

目前页岩气水平井压裂后排采主要依靠现场经验，规律性不强。为此，通过挖掘气藏数值模型的功能，并结合井筒流动模型，初步研究了页岩气水平井分段压裂排采规律。基于正交设计原理，考虑了页岩基质参数、裂缝参数及生产参数等13个影响因素。结果表明，影响压后返排率的因素按影响程度排序依次为破胶液黏度、压力系数、井底流压、段数、单段注入量、裂缝半长、日排液量、返排时机、导流能力、束缚水饱和度、裂缝形态、裂缝支撑剖面和吸附气含量。为了取得最好的压裂后排采效果，上述不可控参数可作为选井、选段的重要依据，而可控参数可用来对压裂施工参数进行优化调整。该成果已在涪陵焦石坝区块的页岩气水平井压裂中成功应用，压裂后排采效果显著，多口应用井压裂后获得10×104 m3/d以上的产量，且稳产前景良好。
목전혈암기수평정압렬후배채주요의고현장경험，규률성불강。위차，통과알굴기장수치모형적공능，병결합정통류동모형，초보연구료혈암기수평정분단압렬배채규률。기우정교설계원리，고필료혈암기질삼수、렬봉삼수급생산삼수등13개영향인소。결과표명，영향압후반배솔적인소안영향정도배서의차위파효액점도、압력계수、정저류압、단수、단단주입량、렬봉반장、일배액량、반배시궤、도류능력、속박수포화도、렬봉형태、렬봉지탱부면화흡부기함량。위료취득최호적압렬후배채효과，상술불가공삼수가작위선정、선단적중요의거，이가공삼수가용래대압렬시공삼수진행우화조정。해성과이재부릉초석패구괴적혈암기수평정압렬중성공응용，압렬후배채효과현저，다구응용정압렬후획득10×104 m3/d이상적산량，차은산전경량호。
At present ,flowback management after fracturing of shale gas horizontal wells mainly de-pends on field experience .By combining gas reservoir simulation model and wellbore flow model ,multistage fracturing flowback pattern of shale gas horizontal wells was simulated preliminarily .Based on the orthogo-nal design method ,13 factors including rock matrix ,fracture ,and production are taken into consideration . T he results indicate that the factors affecting flow back recovery rank in descending sequence as viscosity of gel breaking fluid ,pressure coefficient ,bottom hole flowing pressure ,total stages ,fluid volume injected per stage ,half fracture length ,flowback rate ,flowback time ,fracture conductivity ,irreducible water saturation , fracture shape ,propped fracture profile ,and adsorption gas content .To optimize flowback effect ,controlla-ble factors among those mentioned above can be used to adjust fracture treatment parameters ,and the un-controllable factors can be used in well and interval candidate selection .The research results have been put into application in shale gas fracturing in Jiaoshiba Block of Fuling in Chongqing ,the flow back and produc-tion effect after fracturing is very encouraging ,where gas production of several horizontal wells reach more than 100 ,000 m3/d after fracturing ,and the decline rate is very low .