双封隔取样压力数据深入解释方法研究  

Research on the In-Depth Interpretation of Measured Pressure Data During Fluid Sampling with Dual Packers

作　　者：余强[1] 褚晓冬[1] 周艳敏[1] 秦小飞[1] 孔笋[1] 左有祥 YU Qiang;CHU Xiaodong;ZHOU Yanmin;QIN Xiaofei;KONG Sun;ZUO Youxiang(Well-Tech Department,China Oilfield Services Limited,Langfang,Hebei 065201,China)

机构地区：[1]中海油田服务股份有限公司油田技术事业部,河北廊坊065201

出　　处：《测井技术》2024年第4期558-564,共7页Well Logging Technology

基　　金：中国海洋石油集团有限公司重大项目“测录试关键技术与装备”(KJGG-2022-1401)。

摘　　要：双封隔器是一种地层测试测压取样工具,取样过程通常需要泵抽几小时甚至十几小时,取得地层流体样品,获得压力和流量数据,但无法真实反映地层渗透率的探测范围。利用油藏模拟软件模拟双封隔器泵抽取样过程,引入Schroeter算法和Levitan算法这两种压力/流量数据反褶积算法,反演渗透率参数波及半径从几厘米到上百米,并使用数值模拟案例验证了只利用取样完成后的压力恢复数据进行反褶积方法的准确性和合理性。该研究应用于双封隔现场测井数据,采用反褶积方法得到渗透率探测半径31m,反褶积处理后的数据可用于产能预测,对正确认识油气藏具有重要意义。Dual packer is a kind of formation test pressure measurement sampling tool,the sampling process usually needs to be pumped for several hours or even more than ten hours to obtain formation fluid samples and pressure/flow rate data,but it can’t truly reflect the detection range of formation permeability.In this paper,the reservoir simulation software is used to simulate the pumping process of dual packer,and two pressure/flow data deconvolution algorithm(Schroeter algorithm and Levitan algorithm)are introduced to invert the permeability parameter radius from a few centimeters to hundreds of meters.Numerical simulation cases are used to validate the accuracy and reasonableness of the method of deconvolution using only the final pressure and flow data after the completion of the sampling.This study was applied to the dual packer oilfield logging data to obtain a permeability detection radius of 31 m by using the deconvolution method,which can be used for production capacity prediction,and is of great significance for the correct understanding of the reservoir.

关 键 词：双封隔器 压力/流量反褶积 模型反演 测压解释 地层测试 

分 类 号：P631.84[天文地球—地质矿产勘探]