塔里木克深致密砂岩气藏基质钻井液伤害评价
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摘要
塔里木克深致密砂岩气藏储层基质致密,发育微纳米孔喉,毛管力作用明显,在钻井过程中受到钻井液侵入从而受到伤害,导致油气藏产能降低。常规稳态方法评价低渗致密储层钻井液伤害驱替压差大、稳定时间长,评价效率低。因此,在瞬态压力传导法的基础上建立渗透率数学模型,并使用拉氏变换对模型进行求解。基于模型的解,使用压力传导渗透率仪定量分析了钻井液对克深致密砂岩基质的伤害规律。实验结果表明,油基钻井液平均伤害率为31.24%,水基钻井液平均伤害率为23.67%。该研究成果为评价入井流体伤害提供新的思路。
Micrometer-and nanometer-sized pores are very developed in the matrices of the tight sandstone of Keshen gas reservoir in Tarim Basin, and capillary force plays an important role in formation damage by drilling fluid invasion during drilling, leading to reduced reservoir productivity. Using conventional steady state method to evaluate damage to low permeability tight sandstone by drilling fluid requires high displacing pressure and long stabilization time and is therefore unacceptable. Hence, a mathematic model for permeability calculation was established on the basis of transient pressure transmission method, and the model was solved using Laplace transformation. Based on the solutions to the model, the patterns of damage of the tight sandstone matrices in Keshen gas field by drilling fluids was quantitatively analyzed using pressure transmission permeability tester. Experimental results showed that average percent formation damage by oil base drilling fluids was 31.24%, with water base drilling fluids, on the other hand, this value was23.67%. The research outcome provides a new clue for evaluating the damaging potential of fluids to be injected into the hole.
Micrometer-and nanometer-sized pores are very developed in the matrices of the tight sandstone of Keshen gas reservoir in Tarim Basin, and capillary force plays an important role in formation damage by drilling fluid invasion during drilling, leading to reduced reservoir productivity. Using conventional steady state method to evaluate damage to low permeability tight sandstone by drilling fluid requires high displacing pressure and long stabilization time and is therefore unacceptable. Hence, a mathematic model for permeability calculation was established on the basis of transient pressure transmission method, and the model was solved using Laplace transformation. Based on the solutions to the model, the patterns of damage of the tight sandstone matrices in Keshen gas field by drilling fluids was quantitatively analyzed using pressure transmission permeability tester. Experimental results showed that average percent formation damage by oil base drilling fluids was 31.24%, with water base drilling fluids, on the other hand, this value was23.67%. The research outcome provides a new clue for evaluating the damaging potential of fluids to be injected into the hole.
引文
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[21]王旭升,陈占清.岩石渗透试验瞬态法的水动力学分析[J].岩石力学与工程学报,2006,25(S1):3098-3103.WANG Xusheng,CHEN Zhanqing.Hydrodynamic analysis of transient method in rock seepage tests[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(S1):3098-3103.
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[24]CARSLAW H S,JAEGER J C.Conduction of heat in solids[M].Oxford:Clarendon press,1959.
[25]滕学清,康毅力,张震,等.塔里木盆地深层中-高渗砂岩储层钻井完井损害评价[J].石油钻探技术,2018,46(1):37-43.TENG Xueqing,KANG Yili,ZHANG Zhen,et al.Evaluation of drilling and completion damage in deep medium-to-high permeability sandstone reservoir in Tarim Basin[J].Petroleum Drilling Techniques,2018,46(1):37-43.
[26]蒋官澄,王晓军,关键,等.低渗特低渗储层水锁损害定量预测方法[J].石油钻探技术,2012,40(1):69-73.JIANG Guancheng,WANG Xiaojun,GUAN Jian,et al.The quantitative prediction method of water blocking damage in low and extra-low permeability reservoir[J].Petroleum Drilling Techniques,2012,40(1):69-73.
[2]张洁,王双威,徐俊杰,等.神木区块致密砂岩气藏储层保护钻井液优选[J].油气地质与采收率,2017,24(2):111-115.ZHANG Jie,WANG Shuangwei,XU Junjie,et al.Drilling fluids optimization for reservoir protection in tight sandstone gas reservoirs of the Shenmu block[J].Petroleum Geology and Recovery Efficiency,2017,24(2):111-115.
[3]张路锋,牟建业,贺雨南,等.高温高压碳酸盐岩油藏酸蚀裂缝导流能力实验研究[J].西安石油大学学报(自然科学版),2017,32(4):93-97.ZHANG Lufeng,MOU Jianye,HE Yunan,et al.Study on acid fracture conductivity behavior of high temperature and high closure pressure carbonate reservoir[J].Journal of Xi'an Shiyou University(Natural Science),2017,32(4):93-97.
[4]CAENN R,DARLEY H C H,GRAY G R.Composition and properties of drilling and completion fluids[M].Gulf professional publishing,2011.
[5]REN Y,JIANG G,LI F,et al.Cleanup characteristics and mechanisms of reversible invert emulsion drilling fluid[J].Journal of Petroleum Science and Engineering,2015,133:296-303.
[6]FJELDE I.Formation damages caused by emulsions during drilling with emulsified drilling fluids[C]//International Symposium on Oilfield Chemistry.SPE,2007.
[7]邱奕龙,杨向同,郭平,等.塔里木大北地区基岩岩心钻井液污染伤害评价[J].钻采工艺,2014(5):94-97.QIU Yilong,YANG Xiangtong,GUO Ping,et al.Pollution damage evaluation of mudstone core drilling fluid in Dabei Area,Tarim Basin[J].Drilling&Production Technology,2014(5):94-97.
[8]HOWARD P R,HINKEL J J,MONIAGA N.Assessing Formation Damage From Migratory Clays in Moderate Permeability Formations[C]//SPE International Symposium and Exhibition on Formation Damage Control,SPE,2012.
[9]康毅力,张晓磊,游利军,等.压力衰减法在大牛地致密储层流体敏感性评价中的应用[J].钻井液与完井液,2013,30(6):81-84.KANG Yili,ZHANG Xiaolei,YOU Lijun,et al.A new method to evaluate fluid sensitivity of tight reservoir:pressure decay analysis[J].Drilling Fluid&Completion Fluid,2013,30(6):81-84.
[10]叶艳,鄢捷年,邹盛礼,等.碳酸盐岩裂缝性储层钻井液损害评价新方法[J].石油学报,2008,29(5):752-756.YE Yan,YAN Jienian,ZOU Shengli,et al.A novel method for evaluating damage of drilling fluid to fractured carbonate reservoir[J].Acta Petrolei Sinica,2008,29(5):752-756.
[11]郝明强,刘先贵,胡永乐,等.微裂缝性特低渗透油藏储层特征研究[J].石油学报,2007,28(5):93-98.HAO Mingqiang,LIU Xiangui,HU Yongle,et al.Reservoir characteristics of micro-fractured ultra-low permeability reservoirs[J].Acta Petrolei Sinica,2007,28(5):93-98.
[12]CIPOLLA C L,WARPINSKI N R,MAYERHOFERM,et al.The relationship between fracture complexity,reservoir properties,and fracture-treatment design[J].SPE production&Operations,2010,25(4):438-452.
[13]KRANZ R L,SALTZMAN J S,BLANCIC J D.Hydraulic diffusivity measurements on laboratory rocksamples using an oscillating pore pressure method[J].International Journal of Rock Mechanics and Mining Sciences&Geomechanics Abstracts,1990,27(5):345-352.
[14]FISCHER G J.The determination of permeability and storage capacity:Pore pressure oscillation method[C]//International Geophysics.Academic Press,1992,51:187-211.
[15]BRACE W F,WALSH J B,FRANGOS W T.Permeability of granite under high pressure[J].Journal of Geophysical research,1968,73(6):2225-2236.
[16]HSIEH P A,TRACY J V,NEUZIL C E,et al.Atransient laboratory method for determining the hydraulic properties of‘tight’rocks-I.Theory[C]//International Journal of Rock Mechanics and Mining Sciences&Geomechanics Abstracts.Pergamon,1981,18(3):245-252.
[17]NEUZIL C E,COOLEY C,SILLIMAN S E,et al.Atransient laboratory method for determining the hydraulic properties of‘tight’rocks-II.Application[C]//International Journal of Rock Mechanics and Mining Sciences&Geomechanics Abstracts.Pergamon,1981,18(3):253-258.
[18]DICKER A I,SMITSs R M.A Practical Approach for Determining permeability from laboratory pressure-pulse decay measurements[M].Society of Petroleum Engineers,2008.
[19]朱金智,游利军,张震,等.聚磺混油钻井液对深层裂缝性致密储层的保护能力评价[J].石油钻采工艺,2018,40(3):311-317.ZHU Jinzhi,YOU Lijun,ZHANG Zhen,et al.The protective ability evaluation of polysulfonate mixed drilling fluid for deep fractured tight reservoirs[J].Oil Drilling&Production Technology,2018,40(3):311-317.
[20]张路锋,周福建,辜富洋,等.裂缝性致密砂岩气藏入井流体伤害规律[J].钻井液与完井液,2018,35(5):121-126.ZHANG Lufeng,ZHOU Fujian,GU Fuyang,et al.Regularities of fractured tight sandstone gas reservoirs damaged by work fluids[J].Drilling Fluid&Completion Fluid,2018,35(5):121-126.
[21]王旭升,陈占清.岩石渗透试验瞬态法的水动力学分析[J].岩石力学与工程学报,2006,25(S1):3098-3103.WANG Xusheng,CHEN Zhanqing.Hydrodynamic analysis of transient method in rock seepage tests[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(S1):3098-3103.
[22]刘建坤.低渗透砂岩气藏压裂液伤害机理研究[D].北京:中国科学院研究生院,2011.LIU Jiankun.Study on damage mechanism of fracturing fluid in low permeability sandstone gas reservoir[D].Beijing:Graduate University of Chinese Academy of Sciences,2011.
[23]张路锋,周福建,张士诚,等.基于压力脉冲法的储层基质压裂液伤害评价[J].油气地质与采收率,2018,25(3):1-7.ZHANG Lufeng,ZHOU Fujian,ZHANG Shicheng,et al.Experimental study on reservoir matrix damage caused by fracturing fluids based on transient pressure pulse method[J].Petroleum Geology and Recovery Efficiency,2018,25(3):1-7.
[24]CARSLAW H S,JAEGER J C.Conduction of heat in solids[M].Oxford:Clarendon press,1959.
[25]滕学清,康毅力,张震,等.塔里木盆地深层中-高渗砂岩储层钻井完井损害评价[J].石油钻探技术,2018,46(1):37-43.TENG Xueqing,KANG Yili,ZHANG Zhen,et al.Evaluation of drilling and completion damage in deep medium-to-high permeability sandstone reservoir in Tarim Basin[J].Petroleum Drilling Techniques,2018,46(1):37-43.
[26]蒋官澄,王晓军,关键,等.低渗特低渗储层水锁损害定量预测方法[J].石油钻探技术,2012,40(1):69-73.JIANG Guancheng,WANG Xiaojun,GUAN Jian,et al.The quantitative prediction method of water blocking damage in low and extra-low permeability reservoir[J].Petroleum Drilling Techniques,2012,40(1):69-73.
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