低渗岩性油藏油井生产模式与产能主控因素研究——以夏盐11井区三工河组为例  

Well Production Modes and Control-Factors of Low-Permeability Lithologic Reservoir:A Case Study of Sangonghe Formation in Xiayan 11 Well Block

作　　者：段波龙 DUAN Bolong(Luliang Oil Production Plant,PetroChina Xinjiang Oilfield Company,Karamay Xinjiang 834000,China)

机构地区：[1]中国石油新疆油田分公司陆梁油田作业区,新疆克拉玛依834000

出　　处：《重庆科技学院学报（自然科学版）》2020年第5期33-36,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：中石油科技攻关项目“复杂断块岩性油藏提高水驱开发效果技术”(P2016-032);四川省援疆计划重点项目“岩性油藏储层评价与有利区预测”(FS2017-251)。

摘　　要：低渗岩性油藏的油井产能受岩性、物性、注采关系等多重因素影响。以夏盐11井区三工河组低渗透岩性油藏为例,研究油井生产模式和产能主控因素。低渗透岩性油藏油井表现出5种生产模式:高产含水缓慢上升型、高产含水突进型、中产含水缓慢上升型、中产含水突进型、低产高含水型。油井产能受构造形态影响小,岩性、物性是影响产能的关键因素。受不同岩性之间渗流屏障作用的影响,油水井以不同岩性砂岩连通时,见效时间长,含水上升缓慢;而以相同岩性砂岩连通时,油井产量高,见效明显,但是见水后含水急剧上升。渗流屏障起到了延缓水驱突破时间和类似深部调驱扩大水驱波及体积的作用,利用好不同岩性之间的渗流屏障,有利于提高水驱采收率。The oil well productivity of low permeability is affected by multiple factors such as lithology,physical properties,and injection-production relationships(IPRS).In this paper,the low-permeability lithologic reservoir of Sangonghe Formation in Xiayan 11 well block is taken as an example to study the production mode and the main control-factors of productivity.The production modes of oil wells in the low-permeability lithologic reservoir can be divided into five types:high production water cut slowly rising type,high production water cut advancing type,middle production water cut slowly rising type,middle production water cut advancing type,low production high water content type.The relationship between structure and productivity is weak,while lithology and physical properties are the key factors affecting productivity.Affected by the seepage barrier between different lithologies,oil and water wells are connected by different lithological sandstones,so the effect time is long,and the water cut rises slowly.On the contrary,when connected by sandstone of the same lithology,the oil well production is high,and the effect is obvious,but the water cut rises sharply after the water breakthrough.The seepage barrier plays a role in delaying the breakthrough time of water flooding and expanding the volume of water flooding which is similar to the deep profile flooding.Therefore,the reasonable use of seepage barrier between different lithology is beneficial to improve water drive recovery.

关 键 词：岩性油藏 低渗透 油井产能 影响因素 渗流屏障 

分 类 号：TE33[石油与天然气工程—油气田开发工程]