坪北油田长6储层裂缝特征
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摘要
坪北油田长6储层属于湖相三角洲前缘砂体,是坪北油田的主力产层。通过用倾角测井及微地震波裂缝监测、几何变形分析和相对地压力分析等方法点、面结合分析了坪北长6储层裂缝特征,按成因总结了三种类型,即剪切构造裂缝、层间缝和压裂缝。构造裂缝、层间裂缝不发育,作为渗流通道对坪北长6储层意义不大。压裂缝中的粒间缝与一般的孔喉所起作用相当,而超微压裂缝在原始状态下对渗流没有意义。
The depositional system of Chang-6 reservoir in Pinbei Oilfield is a deltaic front,and Chang-6 reservoir is main producing layer.We researched the characters of fractrue of Chang-6 reservoir through the methods of dip log、micro earthquake wave fracture watching、analyse of geometric distortion and relative earth pressure analyzing,and summarized three type of fractur: shear tectonic fracture,interbedded fracture and pressing fracture.Tectonic fracture and interbedded fracture are developed seldom and have not important sense to chang-6 reservoir as flow path.Fractures in grain of pressing fracture work as ordinary pore,and super-micro pressing fracture has little sense to flow under original state.
The depositional system of Chang-6 reservoir in Pinbei Oilfield is a deltaic front,and Chang-6 reservoir is main producing layer.We researched the characters of fractrue of Chang-6 reservoir through the methods of dip log、micro earthquake wave fracture watching、analyse of geometric distortion and relative earth pressure analyzing,and summarized three type of fractur: shear tectonic fracture,interbedded fracture and pressing fracture.Tectonic fracture and interbedded fracture are developed seldom and have not important sense to chang-6 reservoir as flow path.Fractures in grain of pressing fracture work as ordinary pore,and super-micro pressing fracture has little sense to flow under original state.
引文
[1]李恕军.安塞油田侯市地区长6油层储层特征.西安石油学院学报,1998,18(4),5-9.
[2]王彩丽、孙六一、王宏.长庆气田马五1储层裂缝类型及特征.天然气工业,1999,19(4):8-12.
[3]文玲、胡书毅、田海芹.靖安油田延长组长6段低孔低渗透储层特征及评价.西北地质,2001,34(4):53-60.
[4]纳尔逊著、柳广第等译.天然裂缝性储层地质分析.北京:石油工业出版社,1988:145-153.
[2]王彩丽、孙六一、王宏.长庆气田马五1储层裂缝类型及特征.天然气工业,1999,19(4):8-12.
[3]文玲、胡书毅、田海芹.靖安油田延长组长6段低孔低渗透储层特征及评价.西北地质,2001,34(4):53-60.
[4]纳尔逊著、柳广第等译.天然裂缝性储层地质分析.北京:石油工业出版社,1988:145-153.
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