基于层次分析法的致密气藏储层分类定量评价——以新场气田蓬莱镇组气藏为例  

Quantitative evaluation of tight gas reservoir classification based on analytic hierarchy process:A case study of Penglaizhen Formation gas reservoir in Xinchang Gas Field

作　　者：周锋 黄仕林[1] 李晓明[1] 廖开贵[1] 李勇[1] ZHOU Feng;HUANG Shilin;LI Xiaoming;LIAO Kaigui;LI Yong(Research Institute of Exploration and Development,Sinopec Southwest China Oil&Gas Company,Chengdu,Sichuan 610041,China)

机构地区：[1]中国石化西南油气分公司勘探开发研究院,四川成都610041

出　　处：《油气藏评价与开发》2024年第3期468-474,483,共8页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项“薄层窄河道致密砂岩气藏气藏工程设计关键技术”(2016ZX05048)。

摘　　要：储层评价是致密砂岩气藏开发的基础,评价结果的准确性直接影响气藏开发的潜力分析,评价方法的选择影响到开发指标预测的可靠性、开发调整部署的科学性。为解决致密砂岩气藏储层评价影响因素多、主控因素不明确、参数敏感性未知、评价指标未量化等问题,以川西新场气田蓬莱镇组气藏为例,运用层次分析法理论,建立定量分析模型,将复杂问题简单化、定性问题定量化。方法优选地球物理、测井解释和地质基础等参数为准则指标,通过构造判断矩阵、确定指标权重、一致性检验等步骤,建立定量评价模型,得到权值向量,再利用真实井进行验证分析可采储量和无阻流量均与评价值呈现较好的相关性,说明研究方法具有较好的可靠性,进一步明确了储层划分类型及标准。根据研究方法确定的气藏储层评价指标,可以深化同区致密砂岩气藏开发“甜点”认识,提升致密砂岩气藏储层预测及开发部署质量,为同类气藏高效开发提供借鉴。Reservoir evaluation serves as a foundational aspect in the development of tight sandstone gas reservoirs,with the accuracy of these evaluations critically influencing potential development analyses.The selection of evaluation methodologies is pivotal in ensuring the reliability of development index predictions and the scientific integrity of adjustments and deployment strategies.Addressing the challenges inherent in evaluating tight sandstone gas reservoirs—such as numerous influencing factors,ambiguous controlling factors,unknown parameter sensitivity,and unquantified evaluation indices—this study develops a quantitative analysis model using the analytic hierarchy process(AHP).This approach simplifies complex issues and quantifies qualitative aspects,facilitating a more structured evaluation.Utilizing geophysical data,logging interpretation,and geological fundamentals as criterion indices,the study constructs a judgment matrix to establish a quantitative evaluation model.This involves determining index weights,conducting consistency tests,and deriving a weight vector.The model is then validated through correlation analysis between the recoverable reserves,open flow,and evaluation values of actual wells.Findings demonstrate the method's reliability and further refine the criteria for reservoir classification.The evaluation indices defined through this research enhance the understanding of“sweet spots”for tight sandstone gas reservoir development within the same region,improve the precision of reservoir prediction,and aid in the strategic deployment of development activities.Ultimately,this study offers valuable insights and a methodological framework for the efficient development of similar gas reservoirs.

关 键 词：储层评价 致密砂岩 判断矩阵 参数优选 层次分析法 

分 类 号：TE122[石油与天然气工程—油气勘探]