录井技术在长庆油田水淹层评价中的应用  

Application of mud logging technology in evaluation of water flooded zones in Changqing oilfield

作　　者：苑洪瑞 肖海田 杨志博 YUAN Hongrui;XIAO Haitian;YANG Zhibo(CNPC GWDC Mud Logging Company,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油长城钻探工程有限公司录井公司

出　　处：《录井工程》2020年第1期62-66,共5页Mud Logging Engineering

摘　　要：长庆油田开采方式主要为注水开发,部分油井已进入高含水期,剩余油在平面上和空间上分布规律性差,控水增油难度较大,厘清剩余油分布及水淹状况是油田开发需要解决的一个难题。为此在准确识别储集层物性及流体性质的基础上,结合水淹机理,应用地化和核磁共振录井技术,建立了地化与核磁共振录井谱图识别、核磁共振油水饱和度交会识别及核磁共振孔隙度与剩余油指数交会识别3种评价方法。截至2018年底,三种方法综合应用在长庆油田水淹层识别评价中,总体解释符合率达到了83.3%,并以J 89-834井为例,详细介绍了评价方法的应用效果,为长庆油田开发中剩余油评价及控水增油提供了有效的技术支持。The exploitation mode of Changqing oilfield is mainly waterflood development. Some oil wells have entered a high water-cut stage, and the distribution regularity of remaining oil is poor in plane and space, controlling water cut to increase oil is difficult. Clarifying the distribution of remaining oil and water flooded status is a problem to be solved in oilfield development. Thus, on the basis of accurate identification of physical properties and fluid properties of reservoirs and combinating with water flooded mechanism, the geochemical and NMR logging techniques were applied to establish three evaluation methods, namely, geochemical and NMR logging spectrogram identification, NMR oil-water saturation crossplot identification and NMR porosity and remaining oil index crossplot identification. By the end of 2018, three methods had been comprehensively applied to the identification and evaluation of water flooded zones in Changqing oilfield. The overall interpretation coincidence rate reached 83.3%. Taking J 89-834 well as an example, the application effect of the evaluation methods was introduced in detail, which provides effective technical support for remaining oil evaluation and controlling water cut to increase oil production in Changqing oilfield development.

关 键 词：地化 核磁共振 录井 水淹层评价 长庆油田 剩余油指数 控水增油 

分 类 号：TE132.1[石油与天然气工程—油气勘探]