水驱曲线标定技术可采储量的极限含水率  

Determination of Limit Water Cut of Technically Recoverable Reserves Calibrated by Water Drive Curve

作　　者：连建文 汪耀宗 杨继光 LIAN Jianwen;WANG Yaozong;YANG Jiguang(PetroChina Tuha Oilfield Company,Research Institute of Exploration and Development,Hami,Xinjiang 839009,China;PetroChina Tuha Oilfield Company,Shanshan Oil Production Management District,Hami,Xinjiang 839009,China)

机构地区：[1]中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009 [2]中国石油吐哈油田分公司鄯善采油管理区,新疆哈密839009

出　　处：《新疆石油地质》2024年第6期687-695,共9页Xinjiang Petroleum Geology

基　　金：中国石油科技重大专项(2017E-04-07)。

摘　　要：在动态法标定可采储量中,水驱曲线法是一种重要的方法。该方法是注水油藏不采取重大调整措施、不改变开发方式、水驱状况基本保持稳定时的向前预测,其将极限含水率标准定为0.98,缺乏科学依据。不同油藏的水驱规律存在很大差异,应在4种水驱特征曲线中选择最接近油藏实际的水驱规律,而不是以技术可采储量最低去选择,造成标定的技术可采储量可靠性不强。为此,将4种水驱特征曲线和产量递减法进行反演优选和联合消元,形成新的水(液)油比与递减产量关系式,不仅可以确定极限含水率,也实现了动态法标定技术可采储量结果的唯一性。Water drive curve method is one of the important methods in dynamically calibrating recoverable reserves.This is a forward estimation method for water flooding reservoir without major adjustment measures and changing development modes,and with basically steady water flooding status.Setting the limit water cut at 0.98 lacks a solid scientific basis.Since the water drive characteristics vary significantly among different reservoirs,it is essential to select a water drive curve that best aligns with the reservoir’s actual behavior from the four water drive characteristic curves,rather than choosing the one with the lowest technically recoverable reserves,which will lead to weak reliability of calibration.Therefore,the four water drive characteristic curves and the production decline method were inverted and optimized for joint elimination,and a new relationship between water/liquid⁃oil ratio and production decline was established.This can determine the limit water cut and also ensure the uniqueness of the recoverable reserves calibrated by dynamic methods.

关 键 词：水驱特征曲线 可采储量标定 极限含水率 产量递减方程 水油比 

分 类 号：TE341[石油与天然气工程—油气田开发工程]