中拐凸起598断块上乌尔禾组气藏低产因素分析
|
摘要
中拐凸起上乌尔禾组储层砂体厚度大,非均质性强,相邻断块间产能差异大。为分析598断块低产因素,应用录井、测井、岩心、岩石薄片、分析化验等资料,对598断块存在明显产能差异的邻井进行储层岩石学、物性、储集空间、孔隙结构特征及含油气性对比研究。研究表明,598断块低产井的储层岩石塑性强,碎屑颗粒间主要呈线接触,压嵌式胶结,储层低孔低渗,孔喉配置关系差。储层物性差、孔隙结构复杂是低产的根本因素;黏土矿物含量高,存在一定水敏性是造成低产的重要因素;孔喉配置差,微细吼道发育,地层能量亏空,近井筒地带存在水锁效应也是不可忽略的因素之一。
The sand body of upper Wuerhe formation of Zhongguai uplift has the characteristics of big thickness, strong heterogeneity and great productivity difference between adjacent fault blocks. In order to analyze the low production factors in 598 fault-block, the data of mud logging, gamma logging, core, rock thin sections and analytical analysis were applied to conduct a comparative study on petrology, physical properties, reservoir space, pore structure characteristics and oil-gas bearing characteristics of adjacent wells with obvious productivity differences in 598 fault-block. The results show that the reservoir rock of low production wells in 598 fault-block is of strong plasticity, and the clastic particles are mainly in linear contact with each other, low porosity and permeability, and poor relationship between pore throat configuration. Poor reservoir physical properties and complex pore structure are the fundamental factors of low production. The high content of clay minerals and the presence of water sensitivity are important factors for low production. Poor hole throat configuration, micro-roar development, formation energy loss and water lock effect near the wellbore are important factors that cannot be ignored.
The sand body of upper Wuerhe formation of Zhongguai uplift has the characteristics of big thickness, strong heterogeneity and great productivity difference between adjacent fault blocks. In order to analyze the low production factors in 598 fault-block, the data of mud logging, gamma logging, core, rock thin sections and analytical analysis were applied to conduct a comparative study on petrology, physical properties, reservoir space, pore structure characteristics and oil-gas bearing characteristics of adjacent wells with obvious productivity differences in 598 fault-block. The results show that the reservoir rock of low production wells in 598 fault-block is of strong plasticity, and the clastic particles are mainly in linear contact with each other, low porosity and permeability, and poor relationship between pore throat configuration. Poor reservoir physical properties and complex pore structure are the fundamental factors of low production. The high content of clay minerals and the presence of water sensitivity are important factors for low production. Poor hole throat configuration, micro-roar development, formation energy loss and water lock effect near the wellbore are important factors that cannot be ignored.
引文
[1]雷振宇,鲁兵,蔚远江,等.准噶尔盆地西北缘构造演化与扇体形成和分布[J].石油与天然气地质,2005,26(1):86–91.
[2]汪孝敬,李维锋,董宏,等.砂砾岩岩相成因分类及扇三角洲沉积特征——以准噶尔盆地西北缘克拉玛依油田五八区上乌尔禾组为例[J].新疆石油地质,2017,38(5):537–543.
[3]张顺存,黄治赳,鲁新川,等.准噶尔盆地西北缘二叠系砂砾岩储层主控因素[J].兰州大学学报:自然科学版,2015,51(1):20–30.
[4]蔚远江,李德生,胡素云,等.准噶尔盆地西北缘扇体形成演化与扇体油气藏勘探[J].地球学报,2007,28(1):62–71.
[5]邹才能,侯连华,匡立春,等.准噶尔盆地西缘二叠–三叠系扇控成岩储集相成因机理[J].地质科学,2007,42(3):587–601.
[6]陈能贵,郭沫贞,孟祥超.准噶尔盆地西北缘中二叠统–下三叠统砂砾岩孔隙结构类型及其控制因素[J].新疆石油地质,2016,37(4):401–408.
[7]韩德金,董平川,石娜.储层水敏实验及其形成机理研究[J].大庆石油地质与开发,2008,27(5):14–17.
[8]廖纪佳,唐洪明,朱筱敏,等.特低渗透砂岩储层水敏实验及损害机理研究——以鄂尔多斯盆地西峰油田延长组第8油层为例[J].石油与天然气地质,2012,33(2):321–328.
[9]刘彦学,王宝峰,刘建坤.压裂液对低渗砂岩气藏的水敏性伤害实验研究[J].石油钻探技术,2013,41(1):70–75.
[10]张振华,鄢捷年.低渗透砂岩储集层水锁损害影响因素及预测方法研究[J].石油勘探与开发, 2000,27(3):75–80.
[11]庞振宇,孙卫,雒婉莹,等.低渗透致密气藏水锁空间及伤害程度影响因素探析:以苏里格气田苏48区块盒8储层为例[J].地质科技情报,2014,33(3):140–144.
[12]任冠龙,吕开河,徐涛,等.低渗透储层水锁损害研究新进展[J].中外能源,2013,18(12):55–61.
[13]杨永利.低渗透油藏水锁伤害机理及解水锁实验研究[J].西南石油大学学报,2013,35(3):137–141.
[2]汪孝敬,李维锋,董宏,等.砂砾岩岩相成因分类及扇三角洲沉积特征——以准噶尔盆地西北缘克拉玛依油田五八区上乌尔禾组为例[J].新疆石油地质,2017,38(5):537–543.
[3]张顺存,黄治赳,鲁新川,等.准噶尔盆地西北缘二叠系砂砾岩储层主控因素[J].兰州大学学报:自然科学版,2015,51(1):20–30.
[4]蔚远江,李德生,胡素云,等.准噶尔盆地西北缘扇体形成演化与扇体油气藏勘探[J].地球学报,2007,28(1):62–71.
[5]邹才能,侯连华,匡立春,等.准噶尔盆地西缘二叠–三叠系扇控成岩储集相成因机理[J].地质科学,2007,42(3):587–601.
[6]陈能贵,郭沫贞,孟祥超.准噶尔盆地西北缘中二叠统–下三叠统砂砾岩孔隙结构类型及其控制因素[J].新疆石油地质,2016,37(4):401–408.
[7]韩德金,董平川,石娜.储层水敏实验及其形成机理研究[J].大庆石油地质与开发,2008,27(5):14–17.
[8]廖纪佳,唐洪明,朱筱敏,等.特低渗透砂岩储层水敏实验及损害机理研究——以鄂尔多斯盆地西峰油田延长组第8油层为例[J].石油与天然气地质,2012,33(2):321–328.
[9]刘彦学,王宝峰,刘建坤.压裂液对低渗砂岩气藏的水敏性伤害实验研究[J].石油钻探技术,2013,41(1):70–75.
[10]张振华,鄢捷年.低渗透砂岩储集层水锁损害影响因素及预测方法研究[J].石油勘探与开发, 2000,27(3):75–80.
[11]庞振宇,孙卫,雒婉莹,等.低渗透致密气藏水锁空间及伤害程度影响因素探析:以苏里格气田苏48区块盒8储层为例[J].地质科技情报,2014,33(3):140–144.
[12]任冠龙,吕开河,徐涛,等.低渗透储层水锁损害研究新进展[J].中外能源,2013,18(12):55–61.
[13]杨永利.低渗透油藏水锁伤害机理及解水锁实验研究[J].西南石油大学学报,2013,35(3):137–141.