摘要
断层封闭性评价是气藏改建储气库前期评价的重要内容。以川东WSC气田为例,针对高陡构造带碳酸盐岩地层断层封闭性评价方法开展研究,基于地震解释剖面和三维构造模型,建立了定性与定量相结合的高陡构造带碳酸盐岩地层断层封闭性评价流程与方法。基于工区资料优选了断层产状、断层性质、组合特征、上下盘岩性配置等4个定性评价指标进行断层封闭性评价;针对高陡构造带断层上下盘岩性组合特征,修正了定量评价参数断层横向封堵系数F_(H)中的岩性封堵系数G,并应用其进行了工区断层封闭性定量评价,所得F_(H)平均值大于20;针对碳酸盐岩地层岩性特征,修正了定量评价参数断层泥比率SGR(R_(SG))中发挥封堵涂抹作用的灰泥岩定义,并应用其进行了工区断层封闭性定量评价,所得R_(SG)均大于50%;综合4个定性指标和2个定量参数进行评价,认为研究工区断层封闭性好,适宜改建储气库。
Fault sealing evaluation is an important part of the early evaluation of gas storage reconstruction.Taking WSC gas field in eastern Sichuan as an example,the fault sealing evaluation method of carbonate formation in high-steep structural belt was studied.Based on seismic interpretation profile and three-dimensional structural model,the fault sealing evaluation process and method of carbonate formation in high-steep structural belt were established by combining qualitative and quantitative methods.Based on the data of the work area,four qualitative evaluation indexes,such as fault occurrence,fault properties,combination characteristics and lithology configuration,were optimized for fault sealing evaluation.In view of the lithological combination characteristics of the upper and lower walls of the fault in the high-steep structural belt,the lithologic sealing coefficient G in fault lateral sealing coefficient F_(H),a quantitative evaluation parameter,was modified and applied to the quantitative evaluation of fault sealing in the work area,and the average value of the obtained F_(H) was greater than 20.According to the lithologic characteristics of carbonateformation,the definition of lime mudstone,which plays the role of sealing and smearing in quantitative evaluationparameter of shale gouge ratio SGR,was modified and applied to the quantitative evaluation of fault sealing in the work area,and the obtained SGR was greater than 50%.Based on the evaluation of four qualitative indexes and two quantitative parameters,it is considered that the fault sealing in the study area is effective suitable for rebuilding gas storage.
作者
邵燕林
乔禹达
张娜
黎厚全
肖斌
王平
项梁
SHAO Yanlin;QIAO Yuda;ZHANG Na;LI Houquan;Xiao Bin;WANG Ping;XIANG Liang(School of Geosciences,Yangtze University,Wuhan 430100,Hubei;Chongqing Gas Field,Southwest Oil and Gas Field Company,PetroChina,Chongqing 400021;Qian’an Oil Production Plant,Jilin Oilfield Company,PetroChina,Songyuan 138000,Jilin)
出处
《长江大学学报（自然科学版）》
2022年第1期1-8,共8页
Journal of Yangtze University(Natural Science Edition)
基金
国家科技重大专项“重点海相层系沉积相研究”(2016ZX05007002-003)。
关键词
储气库
碳酸盐岩
高陡构造带
断层封闭性
定量评价
gas storage
carbonate rock
high-steep structural belt
fault sealing
quantitative evaluation
