基于层次分析法的页岩气储层地质工程一体化甜点评价:以昭通页岩气示范区太阳页岩气田海坝地区X井区为例  

Geology-Engineering Intergration Shale Gas Sweet Spot Evaluation Based on Analytic Hierarchy Process:Application to Zhaotong Shale Gas Demonstration District,Taiyang Shale Gas Field,Haiba Area,X Well Region

作　　者：王红岩[1,2] 刘钰洋 张晓伟 郭为[1,2] 于荣泽 孙玉平[1,2] 梁萍萍 康莉霞[1,2] Wang Hongyan;Liu Yuyang;Zhang Xiaowei;Guo Wei;Yu Rongze;Sun Yuping;Liang Pingping;Kang Lixia(Research Institute of Petroleum Exploration and Development(RIPED),PetroChina,Beijing 100083,China;China National Shale Gas Research&Development(Experiment)Center,Langfang 065007,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]国家能源页岩气研发(实验)中心,河北廊坊065007

出　　处：《地球科学》2023年第1期92-109,共18页Earth Science

基　　金：国家科技重大专项(Nos.2016ZX05037-006,2016ZX05035-004);中石油科技管理部前瞻性基础性课题(No.2021DJ2005)。

摘　　要：“甜点”是页岩气储层中相对高产的层位和区域,地质甜点、工程甜点和综合甜点的合理预测及评价,是页岩气规模效益开发的基础之一.针对页岩气储层甜点多参数综合定量评价,引入层次分析法,综合地质与工程要素,基于高分辨率三维地质模型,形成了地质工程一体化页岩气甜点评价的新方法,进行页岩气储层甜点区域的预测.首先,综合前人研究成果,建立了一种页岩气地质甜点、工程甜点和综合甜点评价的指标体系;随后,设计了基于层次分析法的页岩气储层地质工程一体化甜点评价方法的技术路线;最后,采用昭通页岩气田海坝区块X井区实例数据,基于该区域高分辨率三维地质模型,根据形成的甜点评价方法,进行了研究区地质甜点、工程甜点和综合甜点的预测和评价.结果表明,该方法可以综合地质和工程的多种评价指标,实现了昭通页岩气田海坝区块X井区地质甜点、工程甜点和综合甜点的评价,评价的甜点区域主要分布在奥陶系五峰组,志留系龙马溪组一段1亚段1小层、2小层和3小层(L1_(1)^(1),L1_(1)^(2),L1_(1)^(3)),4小层(L1_(1)^(4))相对较少.基于层次分析法的页岩气储层地质工程一体化甜点评价,可以将定性分析和定量分析相结合,为页岩气甜点的圈定提供了一种新思路,提高了甜点评价结果的合理性和准确性.Sweet spot is a relatively high production formation and region in shale gas reservoir.The reasonable prediction and evaluation of geological sweet spot,engineering sweet spot and comprehensive sweet spot is the key to economical and efficient development of shale gas field.To solve the problem of shale gas sweet spot evaluation based on multi-parameter,a new geologyengineering integration shale gas sweet spot evaluation method is introduced.Base on the high-resolution three-dimensional(3D)attributer models,analytic hierarchy process(AHP)is applied to combine the geological sweet spot evaluation indices and engineering sweet spot evaluation indices.Firstly,by integrating the previous researches,a shale gas sweet spot evaluation system is established for geological,engineering and comprehensive sweet spot evaluations.Secondly,the technical route of geologyengineering integration sweet spot evaluation method for shale gas reservoir based on AHP is designed.Lastly,data from X well region in Taiyang shale gas field of Zhaotong shale gas demonstration area are employed to verify the validity of proposed approach.Base on the high-resolution 3D models of the target area,the geological,engineering and comprehensive sweet spot has been evaluated by using the proposed approach.The results show that the proposed approach can realize the evaluation of geological,engineering and comprehensive sweet spot for the target area by integrating geological and engineering indices.The evaluation results show that sweet spot is mainly distributed in Ordovician Wufeng Formation(WF)and the first three layers of the first sub-formation of the first Silurian Longmaxi Formation(L1_(1)^(1),L1_(1)^(2) and L1_(1)^(3)).While,the sweet spot in the fourth layer of the first sub-formation of the first Silurian Longmaxi Formation(L1_(1)^(4))is relatively rarely distributed.By combining the qualitative analysis and quantitative analysis,the proposed geology-engineering integration sweet spot evaluation approach for shale gas reservoir based on AHP p

关 键 词：页岩气 地质甜点 工程甜点 综合甜点 层次分析法 地质工程一体化 

分 类 号：TE349[石油与天然气工程—油气田开发工程]