缝洞型有水油藏动态储量及水体大小定量评价方法  

Quantitative evaluation method of OOIP and aquifer size for fractured-caved carbonate reservoirs with active aquifer support

作　　者：李勇[1] 于清艳 李保柱[1] 陈利新[3] LI Yong YU QingYan LI BaoZhu CHEN LiXin(Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China School of Energy Resources, China University of Geosciences, Beijing 100083, China Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla 841000, China)

机构地区：[1]中国石油勘探开发研究院油气田开发所,北京100083 [2]中国地质大学(北京)能源学院,北京100083 [3]塔里木油田公司勘探开发研究院,库尔勒841000

出　　处：《中国科学：技术科学》2017年第7期708-717,共10页Scientia Sinica(Technologica)

摘　　要：国内缝洞型碳酸盐岩油藏储层非均质性强、连通性差、油水关系复杂,储集体普遍含边底水且不具有统一油水界面,对油井动态储量错误的估计导致油藏钻井成功率普遍较低、开发效果差.如何定量评价该类型储集体的动态储量及水体大小,为下一步开发井位部署及开发技术政策的制定提供支撑是亟需解决的难题.本文基于Blasingame方法及流动物质平衡方法,推导了油藏拟稳态水侵情况下动态储量评价理论,提出了一种基于水侵动态识别方法进行动态储量及水体大小定量评价的流程与方法.本方法首先基于水侵识别方法将油井生产阶段划分为未水侵段、水侵初期阶段及水侵中后期段;然后通过拟合未水侵阶段油井生产动态数据进行动态储量的评价,通过拟合水侵初期油井生产动态进行水体大小的定量评价.通过建立考虑边底水的数值模拟概念模型,以正演的方式验证了本方法的可靠性.该方法已在国内哈拉哈塘缝洞型碳酸盐岩油田中进行了应用,应用效果较好.Fractured-caved carbonate reservoirs have the characteristic of strong heterogeneity, poor connectivity and complicated oil-water relationship, these reservoirs generally contain edge-bottom aquifer support and has non-uniform oil-water contact. Because of wrong estimation of the well original oil in place, well drilling success ratio is generally low and the development performance is also poor.How to quantitatively evaluate this kind of reservoirs＇ reserves and aquifer size by dynamic methods, which can provide support to the following new well drilling and development strategy decision, is the key problem need to solve. Based on the Blasingame method and flowing material balance method, this paper derives the dynamic reserves evaluation theory for reservoirs with pseudo-steady state water-drive and proposes a process and method according to aquifer influx identification to quantitatively evaluate dynamic reserves and aquifer size. This method firstly uses aquifer influx dynamic identification method to divide well production history into three periods： no aquifer influx period, early aquifer influx period and middle-late aquifer influx period. Then the dynamic reserves can be evaluated according to matching well production data of no aquifer influx period, and then the aquifer size can be quantitatively evaluated by means of matching well production data of early aquifer influx period. What＇s more, the established numerical simulation conceptual model with edge and bottom aquifer support verifies that the method is reliable. This method has been widely used in a fractured-caved carbonate oil field in China, the application is good.

关 键 词：动态储量 水体大小 缝洞型油藏 定量评价 Blasingame方法 流动物质平衡方法 

分 类 号：TE155[石油与天然气工程—油气勘探]