复杂断块大跨度油藏层系井网重构研究及应用——以L477井区为例  

Study and Application of Multilayer Well Pattern Reconstruction in Large-span Reservoirs with Complex Fault Blocks——Taking the L477 Well Area as an Example

作　　者：赵玉芝[1] 王红梅[1] 郭发军[1] 王亚洲[2] 王秀伟[1] 邵敏敏 魏宁[1] 高仁安 ZHAO Yuzhi;WANG Hongmei;GUO Fajun;WANG Yazhou;WANG Xiuwei;SHAO Minmin;WEI Ning;GAO Ren'an(The Exploration and Development Research institute of Petrochina Huabei Oilfield Company,Renqiu Hebei 062552;Development Department of Petrochina Huabei Oilfield,Renqiu Hebei 062552)

机构地区：[1]华北油田勘探开发研究院,河北任丘062552 [2]华北油田开发部,河北任丘062552

出　　处：《中国科技纵横》2024年第21期12-16,共5页China Science & Technology Overview

摘　　要：针对复杂断块大跨度油藏层间水驱不均衡、注采系统失衡等问题,本文以L477井区为例,运用油藏工程和数值模拟方法,纵向建立以储量丰度经济界限、渗透率级差等参数为主要指标的层系细分评价方法,平面上以转流线为目标的井网井型优化设计,形成了储量丰度高区域细分两套层系重构井网、丰度低区域错层注水缩小井段矢量注采系统调整模式。方案部署20口内部调整井。目前完钻20口,井区日产油由61吨上升到105吨,自然递减减缓2.5个百分点。本文的研究成果对复杂断块大跨度油藏均衡水驱技术具有较强的指导作用和借鉴意义。To solve the problem of uneven interlayer water driving and unbalance of injection-production system in complex fault block large-span reservoir,taking the L477 well area as an example,reservoir engineering and numerical simulation methods are used to establish the stratified subdivision evaluation method with the economic limit of reserves abundance and permeability level difference as the main indexes,and the well pattern optimization design with the flow line as the target on the plane.The vector injectionproduction system adjustment model is formed by subdividing two sets of stratified reconstructed well pattern in the area of high reserve abundance and reducing well spacing by split-zone waterflooding in the area of low abundance.The scheme deployed 20 internal adjustment Wells,and the numerical simulation predicted that the ultimate recovery rate could be increased by 5.3 percentage points.The research results have a strong guiding role and reference significance for the balanced water drive technology of large-span reservoirs with complex fault blocks.

关 键 词：复杂断块大跨度油藏 开发矛盾 技术经济界限 层系细分 重构水驱井网 

分 类 号：TE324[石油与天然气工程—油气田开发工程]