东风港油田车40、车44块油藏地质特征及开发效果评价
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摘要
东风港油田车40、44块目前处在油田开发的中期阶段,开发过程中表现出的问题主要是,油藏压力水平较低,油井供液不足,产量递减快。为了保证油田有效平稳的开发,详细研究了解工区的油藏地质特征,明确影响开发的地质因素,在此基础上进行生产动态分析和开发效果的评价,找出影响目前开发效果的原因,有针对性的提出技术对策和制定调整措施方案。
本论文对研究区进行了油藏地质特征分析,对主力层段的地层发育特征、沉积特征以及储层非均质性进行了研究。研究认为研究区沙三上段为浊积扇沉积,油层分布以岩性为主要控制因素,属构造—岩性油藏。砂体发育相对较差,各小层内部砂体零散分布,面积小,多呈透镜体状、小面积扇状和条带状,且平面上厚度变化较大(2-6m)。储层平面非均质性较强,连通性较差,给油田大面积注水开发带来一定困难。同时,本文对研究区这种呈透镜状、小面积扇状和条带状零散分布的砂岩油藏的生产特征以及开发效果进行了分析研究,明确指出了目前油田开发过程中存在的注采井数比不合理,油藏压力低,产量自然递减率高等诸多问题。针对存在的问题提出了相应的技术对策,包括开发层系的划分,开发方式的选择,合理井距的确定,日产油能力,含水后最大日产油产液量的确定以及注水量的确定。最后在油藏地质特征及开发特征研究的基础上制定了综合调整方案,共提出转注井27口,重新投注已停注井车40-17-17,更新井一口车40-27-33,注采井数比提高为为1:1.46,并且对15年的生产指标进行预测,采用多种方法计算平均水驱采收率为27.35%。
Che40&Che44 block,DongFenggang is in middle period of development of the oil field, the principal problems in the process of development are that the value of reservoir pressure is on the low side,the feed flow of production wells is insufficient and the decline of production is fast.In order to ensure efficient and steady development, the paper investigates and studies the geologic reservoir characteristics of this area so as to understand the geologic factors which affect the production, and on this basis, the dynamic analysis and the evaluation of development are made in order to find the inappropriate working system existing in production process at present, and proposes advisable technologic countermeasures to the development problems present and develops flood pattern modification in this paper at last.
Firstly,through the investigation of reservoir geology characteristics of the region of interest, stratigraphic characteristics, sedimentary characteristics and reservoir heterogeneity characteristics are studied. The sedimentary facie of the upper sub-section of the third member of Shahejie is turbidity fan, and the distribution of oil layers in the third member of Shahejie is controlled dominantly by lithology. The reservoirs belong to structure-lithology reservoirs.Sand bodies in every layer distribute scatteredly, and have large various thickness with small area in sub layers, liking lens or small fans or banded. The strong heterogeneity and the poor connectivity of reservoir make the pattern flooding difficult.
Then , the studys on the production characteristics and the effect of development point out clearly that many defects exist in the process of development, such as the unreasonable injection to producing well ratio , the low reservoir pressure and high the natural decline rate.
Countermeasures were proposed for the existing problems properly, which contain the division of layer series of development, the choice of development mode, the confirmation of reasonable well spacing, the determination of daily oil production and the daily injection flow rate. At last, adjustment scheme were made on the basis of the former studying, and predicted the development index
本论文对研究区进行了油藏地质特征分析,对主力层段的地层发育特征、沉积特征以及储层非均质性进行了研究。研究认为研究区沙三上段为浊积扇沉积,油层分布以岩性为主要控制因素,属构造—岩性油藏。砂体发育相对较差,各小层内部砂体零散分布,面积小,多呈透镜体状、小面积扇状和条带状,且平面上厚度变化较大(2-6m)。储层平面非均质性较强,连通性较差,给油田大面积注水开发带来一定困难。同时,本文对研究区这种呈透镜状、小面积扇状和条带状零散分布的砂岩油藏的生产特征以及开发效果进行了分析研究,明确指出了目前油田开发过程中存在的注采井数比不合理,油藏压力低,产量自然递减率高等诸多问题。针对存在的问题提出了相应的技术对策,包括开发层系的划分,开发方式的选择,合理井距的确定,日产油能力,含水后最大日产油产液量的确定以及注水量的确定。最后在油藏地质特征及开发特征研究的基础上制定了综合调整方案,共提出转注井27口,重新投注已停注井车40-17-17,更新井一口车40-27-33,注采井数比提高为为1:1.46,并且对15年的生产指标进行预测,采用多种方法计算平均水驱采收率为27.35%。
Che40&Che44 block,DongFenggang is in middle period of development of the oil field, the principal problems in the process of development are that the value of reservoir pressure is on the low side,the feed flow of production wells is insufficient and the decline of production is fast.In order to ensure efficient and steady development, the paper investigates and studies the geologic reservoir characteristics of this area so as to understand the geologic factors which affect the production, and on this basis, the dynamic analysis and the evaluation of development are made in order to find the inappropriate working system existing in production process at present, and proposes advisable technologic countermeasures to the development problems present and develops flood pattern modification in this paper at last.
Firstly,through the investigation of reservoir geology characteristics of the region of interest, stratigraphic characteristics, sedimentary characteristics and reservoir heterogeneity characteristics are studied. The sedimentary facie of the upper sub-section of the third member of Shahejie is turbidity fan, and the distribution of oil layers in the third member of Shahejie is controlled dominantly by lithology. The reservoirs belong to structure-lithology reservoirs.Sand bodies in every layer distribute scatteredly, and have large various thickness with small area in sub layers, liking lens or small fans or banded. The strong heterogeneity and the poor connectivity of reservoir make the pattern flooding difficult.
Then , the studys on the production characteristics and the effect of development point out clearly that many defects exist in the process of development, such as the unreasonable injection to producing well ratio , the low reservoir pressure and high the natural decline rate.
Countermeasures were proposed for the existing problems properly, which contain the division of layer series of development, the choice of development mode, the confirmation of reasonable well spacing, the determination of daily oil production and the daily injection flow rate. At last, adjustment scheme were made on the basis of the former studying, and predicted the development index
引文
[1]吴先承.合理井网密度的选择方法[J].石油学报,1985,6(3):113-120
[2] Tong xianzhang,A comparative Study of Characteristics an Susceptibility of Pattern Type Water-Injection Well Network from Viewpoint of Balanced Water Floods[J].SPE10567
[3]陈元千.不同布井方式下井网密度的确定[J].石油勘探与开发,1986,13(1):60-62
[4]余启泰.计算水驱砂岩油藏合理井网密度与极限井网密度的一种方法[J].石油勘探与开发.1986,13(4):49-54
[5]齐与峰.油田开发总体设计的最优控制[J].石油学报,1987,10(4):98-105
[6]郎兆新.水平井与直井联合开采问题-五点法面积井网[J].石油大学学报(自然科学版),1993,17(6):50-55
[7]郎兆新.油藏工程基础[M].东营:石油大学出版社,1994,20-28
[8]周锡生等.低渗透油藏井网合理加密方式研究[J].大庆石油地质与开发,2000,19(5):20-23
[9]齐与峰等.注采井数比对水驱采收率的影响研究[J].石油勘探与开发,1995,22(1):52-54
[10]熊国荣等.应用干扰试井资料确定文79北块合理注采井网[J].断块油气田,2000,7(4):38-40
[11]彭长水等.注采井网对水驱采收率的影响[J].新疆石油地质,2000,21(4):315-317
[12]马洪涛.复杂断块油藏不同开采阶段井网调整与挖潜措施[J].油气地质与采收率,2001,8(5):56-58
[13]许洪东.窄小砂体油田注采系统调整技术研究[J].世界地质,2001,20(2):148-154
[14]袁向春,杨凤波.高含水期注采井网的重组调整[J].石油勘探与开发,2003,30(5):94-96
[15]侯建锋,姜瑞忠.低渗透油藏压裂井网的水驱采收率与井网密度关系探讨[J].大庆石油地质与开发,2002,21(2):19-20
[16]刘利梅,马传忠,杜兰香,韩胜华,陈红涛.孤岛油田东区行列式井网井排间剩余油潜力分析[J].国外油田工程,2003,19(4):68-69
[17]李兴国.陆相储层沉积微相与微型构造[M].北京:石油工业出版社, 2000,23-33
[18]裘怿楠,陈子琪,主编.油藏描述[M].北京:石油工业出版社,1996,66-77,192-197
[19]齐与峰,李炎波.采注井数比对水驱采收率影响研究[J].石油勘探与开发,1995,22(1):52-53.
[20]才汝成,李阳,孙焕泉等.油气藏工程方法与应用[M].山东东营:石油大学出版社,2002,152-154.
[21] C.R.Clarcson , C.L.Jordan.Production Data Analysis of Coalbed-Methane Wells[J]..SPE107705-PA
[22]阮敏,靳文奇,李庆印.张渠二区开发效果评价[J].西安石油大学学报:自然科学版,2007,22(3):64-66.
[23]童宪章.油井产状和油藏动态分析[M].石油工业出版社,1981,29-45
[24]朱玉双,曲志浩,孙卫等.低渗、特低渗油田注水开发见效见水受控因素分析——以鄯善油田、丘陵油田为例[J].西北大学学报:自然科学版,2003,33(3):314-315.
[25]姜汉桥,姚军,姜瑞忠主编.油藏工程原理与方法[M].山东东营:石油大学出版社,2003,154-202
[26]周红,关振良主编.实用油藏工程[M].北京:中国地质大学出版社,2004,25-38
[27]凡元哲,袁向春.制作含水率与采出程度关系理论曲线常犯错误及解决办法[J].石油与天然气地质,2005,26(3):384-387
[28]谷建伟,李晓庆.油藏高含水开发期确定采收率的一种新方法[J].大庆石油地质与开发,2007,26(1):54-56
[29]袁庆峰,陈鲁含,任玉林等主编.油田开发规划方案编制方法[M].北京:石油工业出版社,2005,156-173
[2] Tong xianzhang,A comparative Study of Characteristics an Susceptibility of Pattern Type Water-Injection Well Network from Viewpoint of Balanced Water Floods[J].SPE10567
[3]陈元千.不同布井方式下井网密度的确定[J].石油勘探与开发,1986,13(1):60-62
[4]余启泰.计算水驱砂岩油藏合理井网密度与极限井网密度的一种方法[J].石油勘探与开发.1986,13(4):49-54
[5]齐与峰.油田开发总体设计的最优控制[J].石油学报,1987,10(4):98-105
[6]郎兆新.水平井与直井联合开采问题-五点法面积井网[J].石油大学学报(自然科学版),1993,17(6):50-55
[7]郎兆新.油藏工程基础[M].东营:石油大学出版社,1994,20-28
[8]周锡生等.低渗透油藏井网合理加密方式研究[J].大庆石油地质与开发,2000,19(5):20-23
[9]齐与峰等.注采井数比对水驱采收率的影响研究[J].石油勘探与开发,1995,22(1):52-54
[10]熊国荣等.应用干扰试井资料确定文79北块合理注采井网[J].断块油气田,2000,7(4):38-40
[11]彭长水等.注采井网对水驱采收率的影响[J].新疆石油地质,2000,21(4):315-317
[12]马洪涛.复杂断块油藏不同开采阶段井网调整与挖潜措施[J].油气地质与采收率,2001,8(5):56-58
[13]许洪东.窄小砂体油田注采系统调整技术研究[J].世界地质,2001,20(2):148-154
[14]袁向春,杨凤波.高含水期注采井网的重组调整[J].石油勘探与开发,2003,30(5):94-96
[15]侯建锋,姜瑞忠.低渗透油藏压裂井网的水驱采收率与井网密度关系探讨[J].大庆石油地质与开发,2002,21(2):19-20
[16]刘利梅,马传忠,杜兰香,韩胜华,陈红涛.孤岛油田东区行列式井网井排间剩余油潜力分析[J].国外油田工程,2003,19(4):68-69
[17]李兴国.陆相储层沉积微相与微型构造[M].北京:石油工业出版社, 2000,23-33
[18]裘怿楠,陈子琪,主编.油藏描述[M].北京:石油工业出版社,1996,66-77,192-197
[19]齐与峰,李炎波.采注井数比对水驱采收率影响研究[J].石油勘探与开发,1995,22(1):52-53.
[20]才汝成,李阳,孙焕泉等.油气藏工程方法与应用[M].山东东营:石油大学出版社,2002,152-154.
[21] C.R.Clarcson , C.L.Jordan.Production Data Analysis of Coalbed-Methane Wells[J]..SPE107705-PA
[22]阮敏,靳文奇,李庆印.张渠二区开发效果评价[J].西安石油大学学报:自然科学版,2007,22(3):64-66.
[23]童宪章.油井产状和油藏动态分析[M].石油工业出版社,1981,29-45
[24]朱玉双,曲志浩,孙卫等.低渗、特低渗油田注水开发见效见水受控因素分析——以鄯善油田、丘陵油田为例[J].西北大学学报:自然科学版,2003,33(3):314-315.
[25]姜汉桥,姚军,姜瑞忠主编.油藏工程原理与方法[M].山东东营:石油大学出版社,2003,154-202
[26]周红,关振良主编.实用油藏工程[M].北京:中国地质大学出版社,2004,25-38
[27]凡元哲,袁向春.制作含水率与采出程度关系理论曲线常犯错误及解决办法[J].石油与天然气地质,2005,26(3):384-387
[28]谷建伟,李晓庆.油藏高含水开发期确定采收率的一种新方法[J].大庆石油地质与开发,2007,26(1):54-56
[29]袁庆峰,陈鲁含,任玉林等主编.油田开发规划方案编制方法[M].北京:石油工业出版社,2005,156-173