BZ油田井间动态连通性研究
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摘要
BZ油田油藏是渤海典型的中高孔渗稠油油藏,目前处于高含水阶段,开展油藏井间动态连通性的研究对后期剩余油挖潜有重要指导意义。稠油油藏原油粘度较高,存在启动压力梯度,传统的井间动态连通性研究方法不适用于稠油油藏。为此,基于系统分析思想,将注水井、生产井及其井间介质看作一个系统,根据物质平衡原理和稠油油藏的产量描述模型,考虑启动压力梯度影响,利用油田的注采生产资料,建立稠油油藏注采井间动态连通性评价的新模型,并利用最小二乘原理反演得到注采关联系数,进而分析BZ油田的井间动态连通状况。研究结果为渤海BZ油田及其他相似油藏的井间动态连通性分析提供了科学依据。
The BZ oilfield reservoir is a typical viscous oil reservoir with medium and high porosity and permeability in Bohai Sea and is currently in a high water cut stage.The research on interwell dynamic connectivity in reservoirs has important guiding significance for tapping the potential of remaining oil in the later stage.The viscosity of crude oil in viscous oil reservoirs is high and there is a starting pressure gradient.Traditional research method of interwell dynamic connectivity is not suitable for viscous oil reservoirs.Therefore,water injection wells,production wells and their interwell media are regarded as a system based on the systematic analysis idea.According to the principle of material balance and the production description model of viscous oil reservoir,the influence of starting pressure gradient is considered.A new model for evaluating dynamic connectivity between injection and production wells in viscous oil reservoirs is established by using the injection and production data of the oilfield.And the least square principle inversion is used to obtain the correlation coefficient of injection and production,then the interwell dynamic connectivity in BZ oilfield is analyzed with this coefficient.The research results provide a scientific basis for the analysis of interwell dynamic connectivity in Bohai BZ oilfield and other similar oil reservoirs.
The BZ oilfield reservoir is a typical viscous oil reservoir with medium and high porosity and permeability in Bohai Sea and is currently in a high water cut stage.The research on interwell dynamic connectivity in reservoirs has important guiding significance for tapping the potential of remaining oil in the later stage.The viscosity of crude oil in viscous oil reservoirs is high and there is a starting pressure gradient.Traditional research method of interwell dynamic connectivity is not suitable for viscous oil reservoirs.Therefore,water injection wells,production wells and their interwell media are regarded as a system based on the systematic analysis idea.According to the principle of material balance and the production description model of viscous oil reservoir,the influence of starting pressure gradient is considered.A new model for evaluating dynamic connectivity between injection and production wells in viscous oil reservoirs is established by using the injection and production data of the oilfield.And the least square principle inversion is used to obtain the correlation coefficient of injection and production,then the interwell dynamic connectivity in BZ oilfield is analyzed with this coefficient.The research results provide a scientific basis for the analysis of interwell dynamic connectivity in Bohai BZ oilfield and other similar oil reservoirs.
引文
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[18]崔文华,刘晓冰,王伟,等.混合蛙跳算法研究综述[J].控制与决策,2012,27(4):481-486.CUI Wenhua,LIU Xiaobing,WANG Wei,et al.Survey on shuffled frog leaping algorithm[J].Control and Decision,2012,27(4):481-486.
[2]陈存良,韩晓冬,赵汉卿,等.低渗透油藏井间动态连通性研究[J].特种油气藏,2018,25(2):102-106.CHEN Cunliang,HAN Xiaodong,ZHAO Hanqing,et al.Dynamic inter-well connectivity in low-permeability oil reservoir[J].Special Oil&Gas Reservoirs,2018,25(2):102-106.
[3]何芬.渤中34-1油田稳产挖潜与对策[J].录井工程,2016,27(2):35-40.HE Fen.Stable tapping potential and countermeasures for stable production of Bozhong 34-1oilfield[J].Mud Logging Engineering,2016,27(2):35-40.
[4]徐耀辉,陈丹,向廷生,等.应用紫外光谱技术研究油藏连通性的探讨:以QHD32-6油田西区稠油油藏为例[J].石油天然气学报(江汉石油学院学报),2006,28(5):44-46.XU Yaohui,CHEN Dan,XIANG Tingsheng,et al.Studying the continuity of heavy oil reservoirs by using ultraviolet spectral technique:Taken heavy oil reservoirs in the west region of QHD 32-6oilfield for example[J].Journal of Oil and Gas Technology(Journal of Jianghan Petroleum Institute),2006,28(5):44-46.
[5]许向峰.井间示踪剂监测在复杂断块油藏描述中的应用[J].录井工程,2017,28(1):83-86.XU Xiangfeng.Application of cross-well tracer monitoring in description of complex fault block reservoirs[J].Mud Logging Engineering,2017,28(1):83-86.
[6]杜鹃红.干扰试井技术在油藏描述和动态调整中的应用[J].油气井测试,2008,17(6):32-34.DU Juanhong.Application of interference well testing technology in oil reservoir description and performance adjustment[J].Well Testing,2008,17(6):32-34.
[7]万新德,吴逸.脉冲试井在油田开发中的应用[J].特种油气藏,2006,13(3):66-69.WAN Xinde,WU Yi.Application of pulse testing in oilfield development[J].Special Oil&Gas Reservoirs,2006,13(3):66-69.
[8]冯其红,陈存良,杨光龙,等.利用注采数据研究岔15油田井间连通性[J].特种油气藏,2014,21(6):87-89.FENG Qihong,CHEN Cunliang,YANG Guanglong,et al.Study on inter-well connectivity of Cha 15oilfield by using injection production data[J].Special Oil&Gas Reservoirs,2014,21(6):87-89.
[9]王治国,张继成,宋考平,等.应用速率关联度分析井间连通情况[J].特种油气藏,2011,18(3):91-93.WANG Zhiguo,ZHANG Jicheng,SONG Kaoping,et al.Analysis of inter-well connectivity by using rate correlation[J].Special Oil&Gas Reservoirs,2011,18(3):91-93.
[10]郭素杰,马友生,蔡军,等.基于灰色关联分析的产能指数在储集层评价中的应用[J].录井工程,2016,27(4):40-44.GUO Sujie,MA Yousheng,CAI Jun,et al.Application of productivity index based on grey correlation analysis in reservoir evaluation[J].Mud Logging Engineering,2016,27(4):40-44.
[11]赵辉,姚军,吕爱民,等.利用注采开发数据反演油藏井间动态连通性[J].中国石油大学学报(自然科学版),2010,34(6):91-94.ZHAO Hui,YAO Jun,LV Aimin,et al.Reservoir inter-well dynamic connectivity inversion based on injection and production data[J].Journal of China University of Petroleum(Edition of Natural Science),2010,34(6):91-94.
[12]LIANG XiMing.A simple model to infer interwell connectivity only from well-rate fluctuations in waterfloods[J].Journal of Petroleum Science and Engineering,2010,70(1/2):35-43.
[13]许家峰,孙福街,田冀,等.考虑启动压力梯度时普通稠油非线性渗流模型解析求解方法[J].中国海上油气,2011,23(1):32-35.XU Jiafeng,SUN Fujie,TIAN Ji,et al.An analytic solution method of nonlinear seepage models with ordinary heavy oil when taking threshold pressure gradient into consideration[J].China Offshore Oil and Gas,2011,23(1):32-35.
[14]Sayarpour M,Zuluaga E,Kabir C S,et al.The use of capacitance-resistance models for rapid estimation of waterflood performance and optimization[J].Journal of Petroleum Science and Engineering,2009,69(3):227-238.
[15]韩学辉,卢时林,支乐菲,等.应用最小二乘支持向量机识别J13井区杜家台油层岩性[J].特种油气藏,2011,18(6):18-21.HAN Xuehui,LU Shilin,ZHI Lefei,et al.Identification of lithology of Dujiatai oil layer in J13well block by least squares support vector machine[J].Special Oil&Gas Reservoirs,2011,18(6):18-21.
[16]陈存良,王振,牛伟,等.基于最小二乘支持向量机的大孔道定量计算方法[J].断块油气田,2015,22(1):74-77.CHEN Cunliang,WANG Zhen,NIU Wei,et al.Quantitative calculation method of thief zone based on least square support vector machine[J].Fault-Block Oil and Gas Field,2015,22(1):74-77.
[17]鲁港,李晓光,陈铁铮,等.钻井液卡森模式流变参数非线性最小二乘估计新算法[J].石油学报,2008,29(3):470-474.LU Gang,LI Xiaoguang,CHEN Tiezheng,et al.Anew method for non-linear least square estimation on rheological parameter in Casson model of drilling fluid[J].Acta Petrolei Sinica,2008,29(3):470-474.
[18]崔文华,刘晓冰,王伟,等.混合蛙跳算法研究综述[J].控制与决策,2012,27(4):481-486.CUI Wenhua,LIU Xiaobing,WANG Wei,et al.Survey on shuffled frog leaping algorithm[J].Control and Decision,2012,27(4):481-486.