南海流花油田储层特征及敏感性评价
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摘要
南海流花油田经过长时间注水开发后出现注水压力上升、注水量下降以及达不到配注要求等问题。为此,通过对该油田注水层段储层特征分析以及储层敏感性实验评价,找出注水过程中潜在的损害因素,并提出合理的储层保护措施建议。储层特征分析结果表明:储层岩石类型以岩屑石英砂岩、长石岩屑石英砂岩为主,黏土矿物以伊/蒙混层和蒙脱石为主;储层物性良好,属于中孔、中渗储层;地层原油性质较好,属于轻质原油,地层水型为Na HCO3水型。敏感性实验结果表明:储层临界流速为5 m L·min-1,具有弱速敏;临界矿化度为4 480 mg·L-1,储层具有强水敏;储层不存在盐酸敏感性,存在弱土酸敏;临界p H为13,储层具有弱碱敏。在油田后续注水过程中应严格控制注水速度、控制入井流体的矿化度和p H,采取合适的酸化处理措施等。
After a long period of water flooding development in South China Sea Liuhua oilfield,problems such as increasing water injection pressure,decreasing water injection rate and failing to meet the injection allocation requirements appear. Therefore,through the analysis of reservoir characteristics and reservoir sensitivity evaluation,the potential damage factors in the process of water flooding are found out,and reasonable reservoir protection measures are put forward. Reservoir characteristics analysis results show that the reservoir rock types are mainly lithic quartz sandstone and feldspar lithic quartz sandstone,clay minerals are mainly Illite/montmorillonite layer and montmorillonite; Reservoir physical properties are good,belong to medium porosity and permeability reservoir;Formation crude oil properties are good,belong to light crude oil,formation water type is NaHCO3 water type. Sensitivity test results show that the reservoir has a weak velocity sensitivity with a critical flow rate of 5 m L·min-1,a critical salinity of 4 480 mg·L-1,a reservoir with strong water sensitivity,a reservoir without hydrochloric acid sensitivity,a weak soil acid sensitivity,a critical pH of 13,a reservoir with weak alkali sensitivity. During the followup water injection process in the oilfield,the injection rate,the salinity and p H of the fluid entering the well should be strictly controlled,and appropriate acidizing treatment measures should be taken.
After a long period of water flooding development in South China Sea Liuhua oilfield,problems such as increasing water injection pressure,decreasing water injection rate and failing to meet the injection allocation requirements appear. Therefore,through the analysis of reservoir characteristics and reservoir sensitivity evaluation,the potential damage factors in the process of water flooding are found out,and reasonable reservoir protection measures are put forward. Reservoir characteristics analysis results show that the reservoir rock types are mainly lithic quartz sandstone and feldspar lithic quartz sandstone,clay minerals are mainly Illite/montmorillonite layer and montmorillonite; Reservoir physical properties are good,belong to medium porosity and permeability reservoir;Formation crude oil properties are good,belong to light crude oil,formation water type is NaHCO3 water type. Sensitivity test results show that the reservoir has a weak velocity sensitivity with a critical flow rate of 5 m L·min-1,a critical salinity of 4 480 mg·L-1,a reservoir with strong water sensitivity,a reservoir without hydrochloric acid sensitivity,a weak soil acid sensitivity,a critical pH of 13,a reservoir with weak alkali sensitivity. During the followup water injection process in the oilfield,the injection rate,the salinity and p H of the fluid entering the well should be strictly controlled,and appropriate acidizing treatment measures should be taken.
引文
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13 陈德承,王振奇.崖城气田储层特征及敏感性研究[J].能源化工,2016,37(6):78-82Chen Decheng,Wang Zhenqi. Reservoir characteristics and sensitivity evaluation of Yacheng gas field[J]. Energy Chemical Industry,2016,37(6):78-82
14 李宜强,王顺华,贾敬锋,等.高台子储层敏感性评价[J].科学技术与工程,2011,11(12):2798-2800Li Yiqiang,Wang Shunhua,Jia Jingfeng,et al. The evaluation on the sensitivities of the formation in Gaotaizi reservoir[J]. Science Technology and Engineering,2011,11(12):2798-2800
15 徐豪飞,马宏伟,尹相荣,等.新疆油田超低渗透油藏注水开发储层损害研究[J].岩性油气藏,2013,25(2):100-106Xu Haofei,Ma Hongwei,Yin Xiangrong,et al. Study on formation damage with water flooding for ultra-low permeability reservoir in Xinjiang oilfield[J]. Lithologic Reservoirs,2013,25(2):100-106
16 冯于恬,唐洪明,刘枢,等.渤中28-2南油田注水过程中储层损害机理分析[J].油田化学,2014,31(3):371-376Feng Yutian,Tang Hongming,Liu Shu,et al. Analysis of reservoir damage mechanism of BZ28-2 South oilfield during water flooding[J]. Oilfield Chemistry,2014,31(3):371-376
2 陈元千,吕恒宇,傅礼兵,等.注水开发油田加密调整效果的评价方法[J].油气地质与采收率,2017,24(6):60-64Chen Yuanqian,LüHengyu,Fu Libing,et al. Evaluation method of infilling adjustment effect for waterflooding development oilfields[J].Petroleum Geology and Recovery Efficiency,2017,24(6):60-64
3 李海方.低渗透油田注水开发技术研究[J].中国石油和化工标准与质量,2017,37(11):161-162Li Haifang. Study on water injection development technology in low permeability oilfield[J]. China Petroleum and Chemical Standard and Quality,2017,37(11):161-162
4 胡治华,马奎前,刘宗宾,等.海上S油田注水开发后期储层物性变化规律及应用[J].科学技术与工程,2014,14(15):164-168Hu Zhihua,Ma Kuiqian,Liu Zongbin,et al. Research and application of the properties variation regularity of water injection reservoirs in S offshore oilfield[J]. Science Technology and Engineering,2014,14(15):164-168
5 郭云峰,黄嘉琦.低渗油田储层酸化解堵技术应用[J].辽宁化工,2017,46(11):1132-1134Guo Yunfeng,Huang Jiaqi. Application of acidification blocking removal technology in low permeability oilfields[J]. Liaoning Chemical Industry,2017,46(11):1132-1134
6 姜兰兰.注水开发工艺技术应用分析[J].科学技术与工程,2011,11(33):8321-8324Jiang Lanlan. Water flooding technology and its application analysis[J]. Science Technology and Engineering, 2011, 11(33):8321-8324
7 任洪明,张诗通,何泽龙,等.黄龙00S-E井酸化解堵效果评价[J].重庆科技学院学报(自然科学版),2017,19(1):79-81Ren Hongming,Zhang Shitong,He Zelong,et al. Evaluation of the effect of blocking acidification of Huanglong 00S-E well[J]. Journal of Chongqing University of Science and Technology(Natural Sciences Edition),2017,19(1):79-81
8 崔刚,沈建军,唐洪明,等. QK18-1油田注水开发储层损害研究[J].油田化学,2017,34(3):456-462Cui Gang,Shen Jianjun,Tang Hongming,et al. Research on reservoir damage of water flooding in QK18-1 oilfield[J]. Oilfield Chemistry,2017,34(3):456-462
9 刘清云,黄卫红,刘磊,等.克拉玛依油田注水储层伤害与水质问题分析[J].地质科技情报,2017(4):210-214Liu Qingyun,Huang Weihong,Liu Lei,et al. Reservoir damage and quality index of injected water in Karamay oilfield[J]. Geological Science and Technology Information,2017(4):210-214
10 李欢,王小琳,任志鹏,等.注入水水质对姬塬长8油藏储层伤害的影响研究[J].科学技术与工程,2012,12(24):6003-6007Li Huan,Wang Xiaolin,Ren Zhipeng,et al. The impact of injected water quality on reservoir damage of Chang8 Mumber in Jiyuan[J].Science Technology and Engineering,2012,12(24):6003-6007
11 王亮,吕易珊,张红香,等.海拉尔油田储层损害机理研究[J].科学技术与工程,2012,12(8):1889-1891Wang Liang,LüYishan,Zhang Hongxiang,et al. Research on reservoir damage mechanism in Hailaer oilfield[J]. Science Technology and Engineering,2012,12(8):1889-1891
12 胡治华,马奎前,刘宗宾,等.海上S油田注水开发后期储层物性变化规律及应用[J].科学技术与工程,2014,14(15):164-168Hu Zhihua,Ma Quiqian,Liu Zongbin,et al. Research and application of the properties variation regularity of water injection reservoirs in S offshore oilfield[J]. Science Technology and Engineering,2014,14(15):164-168
13 陈德承,王振奇.崖城气田储层特征及敏感性研究[J].能源化工,2016,37(6):78-82Chen Decheng,Wang Zhenqi. Reservoir characteristics and sensitivity evaluation of Yacheng gas field[J]. Energy Chemical Industry,2016,37(6):78-82
14 李宜强,王顺华,贾敬锋,等.高台子储层敏感性评价[J].科学技术与工程,2011,11(12):2798-2800Li Yiqiang,Wang Shunhua,Jia Jingfeng,et al. The evaluation on the sensitivities of the formation in Gaotaizi reservoir[J]. Science Technology and Engineering,2011,11(12):2798-2800
15 徐豪飞,马宏伟,尹相荣,等.新疆油田超低渗透油藏注水开发储层损害研究[J].岩性油气藏,2013,25(2):100-106Xu Haofei,Ma Hongwei,Yin Xiangrong,et al. Study on formation damage with water flooding for ultra-low permeability reservoir in Xinjiang oilfield[J]. Lithologic Reservoirs,2013,25(2):100-106
16 冯于恬,唐洪明,刘枢,等.渤中28-2南油田注水过程中储层损害机理分析[J].油田化学,2014,31(3):371-376Feng Yutian,Tang Hongming,Liu Shu,et al. Analysis of reservoir damage mechanism of BZ28-2 South oilfield during water flooding[J]. Oilfield Chemistry,2014,31(3):371-376