涠洲A油田水淹储层参数变化规律及机理研究
|
摘要
涠洲A油田经过多年注水开发,目前油田综合含水率已达70%,开展水淹过程储层动态变化研究,对于油田后期开发具有重要意义。通过开展一系列储层微观实验,对比同种岩石相水淹前后储层参数特征,结合地质背景开展机理分析,得到以下两点认识:(1)水淹导致储层物性明显变差,孔喉结构非均质性变强,粒内溶孔和铸模孔含量增多,泥质含量降低,黏土矿物含量及类型发生改变;(2)水淹过程中储层物性变化的主控因素为硫酸钡晶体的生成和析出,其次为黏土矿物的水化、膨胀、分散、迁移。注入水与地层水不匹配,导致硫酸钡晶体结晶析出形成沉淀,并堵塞喉道。
After years of waterflooding,the total water cut has grown up to 70%in the Weizhou A Oilfield.It is urgently required to carry out researches on the dynamic changes in reservoir parameters during water-flood process for future development and production.Through a series of reservoir microcosmic experiments,we made a comparison of the reservoir parameters before and after flooding for the reservoir of same lithofacies.Mechanism analysis based on geological background was also carried out.It is concluded that,waterlogging may result in obvious deterioration of reservoir properties,such as strong heterogeneity in pore throat structures,increase in pores and moldic holes,decease in mud content and changes of clay in both content and type;during flooding process,the main factor for the changes in reservoir property is the production and precipitation of barium sulfate crystals,followed by hydration,expansion,dispersion and migration of clay minerals.As the injected water does not match well with the formation water,barium sulfate crystals crystallized and precipitated,eventually clogged up the throat and led to poor physical properties.
After years of waterflooding,the total water cut has grown up to 70%in the Weizhou A Oilfield.It is urgently required to carry out researches on the dynamic changes in reservoir parameters during water-flood process for future development and production.Through a series of reservoir microcosmic experiments,we made a comparison of the reservoir parameters before and after flooding for the reservoir of same lithofacies.Mechanism analysis based on geological background was also carried out.It is concluded that,waterlogging may result in obvious deterioration of reservoir properties,such as strong heterogeneity in pore throat structures,increase in pores and moldic holes,decease in mud content and changes of clay in both content and type;during flooding process,the main factor for the changes in reservoir property is the production and precipitation of barium sulfate crystals,followed by hydration,expansion,dispersion and migration of clay minerals.As the injected water does not match well with the formation water,barium sulfate crystals crystallized and precipitated,eventually clogged up the throat and led to poor physical properties.
引文
[1]申辉林,韩情忠,匡立春,等.测井多井解释技术在克拉玛依砾岩油藏水淹层评价中的应用[J].石油大学学报:自然科学版,1998,22(2):21-25.
[2]许小琼,王志战,慈兴华.利用磁共振录井技术定量评价水淹层[J].波谱学杂志,2012,29(2):209-214.
[3]陈科贵,刘顺生,曹鉴华,等.吐哈MW油田水淹层测井解释方法与应用[J].西南石油学院学报,2004,26(6):5-8.
[4]邵维志,梁巧峰,丁娱娇,等.核磁共振测井评价水淹层方法的研究及应用[J].测井技术,2004,28(1):34-44.
[5]张学磊,沈楠,樊茹,等.神经网络技术在复杂断块油藏水淹层评价中的应用[J].复杂油气藏,2015,8(3):55-70.
[6]徐静,高伟,楚延军,等.RMT在保浪油田水淹层评价中的应用[J].西南石油大学学报:自然科学版,2008,30(6):135-137.
[7]郭小燕,魏远明,郭蓓蕾,等.八面河油田水淹层储层性质变化及测井响应特征研究[J].中国西部科技,2011,10(14):13-15.
[8]何文祥,许雅.港东开发区水淹前后储层参数变化规律及机理研究[J].断块油气田,2010,17(2):191-193.
[9]操应长,葸克来,朱如凯,等.松辽盆地南部泉四段扶余油层致密砂岩储层微观孔喉结构特征[J].中国石油大学学报:自然科学版,2015,39(5):7-15.
[10]杨正明,姜汉桥,李树铁,等.低渗气藏微观孔隙结构特征参数研究—以苏里格和迪那低渗气藏为例[J].石油天然气学报(江汉石油学院学报),2007,29(6):108-119.
[11]俞军.大庆油田注水开发后期储层性质变化研究[J].油气田地面工程,2007,26(3):15-16.
[12]王娜,句振伟,王汉军,等.水淹层测井评测方法在鄯善油田二次开发中的应用[J].工程地球物理学报,2013,10(1):35-40.
[13]王志章,蔡毅,杨蕾,等.开发中后期油藏参数变化规律及变化机理[M].北京:石油工业出版社,1999:87-94.
[14]张洪波,王志章,戴胜群,等.水驱前后油藏参数变化机理研究[J].石油天然气学报(江汉石油学院学报),2005,27(4):665-666.
[15]赵晓东,杨少春,钟思瑛,等.注水开发油田黏土矿物变化及其对剩余油形成影响[J].矿物学报,2014,34(4):591-598.
[16]何文祥,谭文才,马超亚,等.特低渗透储层水驱前后储层特征变化规律及机理研究[J].石油天然气学报,2010,32(5):56-59.
[17]李跃喜,付美龙,熊帆,等.涠洲12-1油田油井结垢现状分析及对策研究[J].石油天然气学报,2010,32(2):327-329.
[2]许小琼,王志战,慈兴华.利用磁共振录井技术定量评价水淹层[J].波谱学杂志,2012,29(2):209-214.
[3]陈科贵,刘顺生,曹鉴华,等.吐哈MW油田水淹层测井解释方法与应用[J].西南石油学院学报,2004,26(6):5-8.
[4]邵维志,梁巧峰,丁娱娇,等.核磁共振测井评价水淹层方法的研究及应用[J].测井技术,2004,28(1):34-44.
[5]张学磊,沈楠,樊茹,等.神经网络技术在复杂断块油藏水淹层评价中的应用[J].复杂油气藏,2015,8(3):55-70.
[6]徐静,高伟,楚延军,等.RMT在保浪油田水淹层评价中的应用[J].西南石油大学学报:自然科学版,2008,30(6):135-137.
[7]郭小燕,魏远明,郭蓓蕾,等.八面河油田水淹层储层性质变化及测井响应特征研究[J].中国西部科技,2011,10(14):13-15.
[8]何文祥,许雅.港东开发区水淹前后储层参数变化规律及机理研究[J].断块油气田,2010,17(2):191-193.
[9]操应长,葸克来,朱如凯,等.松辽盆地南部泉四段扶余油层致密砂岩储层微观孔喉结构特征[J].中国石油大学学报:自然科学版,2015,39(5):7-15.
[10]杨正明,姜汉桥,李树铁,等.低渗气藏微观孔隙结构特征参数研究—以苏里格和迪那低渗气藏为例[J].石油天然气学报(江汉石油学院学报),2007,29(6):108-119.
[11]俞军.大庆油田注水开发后期储层性质变化研究[J].油气田地面工程,2007,26(3):15-16.
[12]王娜,句振伟,王汉军,等.水淹层测井评测方法在鄯善油田二次开发中的应用[J].工程地球物理学报,2013,10(1):35-40.
[13]王志章,蔡毅,杨蕾,等.开发中后期油藏参数变化规律及变化机理[M].北京:石油工业出版社,1999:87-94.
[14]张洪波,王志章,戴胜群,等.水驱前后油藏参数变化机理研究[J].石油天然气学报(江汉石油学院学报),2005,27(4):665-666.
[15]赵晓东,杨少春,钟思瑛,等.注水开发油田黏土矿物变化及其对剩余油形成影响[J].矿物学报,2014,34(4):591-598.
[16]何文祥,谭文才,马超亚,等.特低渗透储层水驱前后储层特征变化规律及机理研究[J].石油天然气学报,2010,32(5):56-59.
[17]李跃喜,付美龙,熊帆,等.涠洲12-1油田油井结垢现状分析及对策研究[J].石油天然气学报,2010,32(2):327-329.