海相砂岩油藏水驱动态规律及主控因素  

Water Drive Performance and Main Controlling Factors of Marine Sandstone Reservoir

作　　者：戴建文 李伟 徐伟 王丹翎 涂乙 Dai Jianwen;Li Wei;Xu Wei;Wang Danling;Tu Yi(Shenzhen Branch,CNOOC China Limited,Shenzhen Guangdong 518000)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《中外能源》2021年第5期33-37,共5页Sino-Global Energy

摘　　要：针对南海东部海相砂岩油藏水驱动态规律认识不清、主控因素不明确等问题,将油田单井动态生产资料与地质油藏影响因素相结合,从单一因素分析到多因素耦合分析,找出了水驱动态规律的主控因素,从而指导了油田后续调整开发。研究表明,以海上Y油田为例,根据64口单井的生产资料,主要划分出4种水淹类型:开井水淹型、暴性水淹型、缓慢水淹型及爬坡型。根据不同水淹类型分析隔夹层分布模式、隔夹层发育长度、夹层物性、避水高度、水体厚比、原油黏度、射孔段长度、油井射孔段与边水距离对水淹规律的影响,利用灰色关联度法定量评价了各主控因素对水驱动态规律影响大小,其中避水高度为底水油藏生产动态变化的主控因素,关联度为0.80,边水油藏生产动态变化的主控因素为水体厚比,关联度为0.92。研究成果明确了4种水淹类型各因素的组合形式,定量评价找出了影响生产动态变化的主控因素,为高含水期油田挖潜方案调整指明了方向。Aiming at unclear water drive performance and main controlling factors in marine sandstone reservoirs at the east of the South China sea,the main controlling factors of water drive performance are found out based on the analysis from single factor to multi-factors coupling according to the combination of dy-namic production data of single well in oil field with geological reservoir factors,and then oilfield development adjustment may be guided.The research shows that four types of flooding can be divided according to the production data of 64 single wells in offshore Oilfield Y :flooding type while opening,burst flooding type,slow flooding type and slope climbing type.According to different water flooding types,the influence of distribution model,development length,physical properties of interlayers,water avoidance height,water thickness ratio,crude oil viscosity,perforation length,distance between oil well perforation interval and edge water on water flooding is analyzed.Grey correlation method is used to quantitatively evaluate the effect of main control-ling factors on water drive performance.Among them,the water avoidance height is the main controlling factor of the production performance change in the bottom water reservoir with a correlation degree of 0.80;and the main controlling factor of the production performance change in the edge water reservoir is the water thick-ness ratio with a correlation degree of 0.92.The combined forms of the factors for four types of water flood-ing are identified by the research results,and the main controlling factors affecting the dynamic production changes were found by quantitative evaluation.It points out the direction for the adjustment of the potential tapping program in the high water-cut period of the oilfield.

关 键 词：海相砂岩油藏 水驱动态 水淹类型 水淹模式 主控因素 定量评价 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]